CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Huan Lv,Shengyan Meng,Zhaolun Cui,Shangkun Li,Dongxing Li,Xiaoxia Gao,Hongchen Guo,Annemie Bogaerts,Yanhui Yi
Efficient methane conversion to methanol remains a significant challenge in chemical industry. This study investigates the direct oxidation of methane to methanol under mild conditions, employing a synergy of non-thermal plasma and Cu-MOR (Copper-Mordenite) catalysts. Catalytic tests demonstrate that the Cu-MOR IE-3 catalyst (i.e., prepared by three cycles of ion exchange) exhibits superior catalytic performance (with 51 % methanol selectivity and 7.9 % methane conversion). Conversely, the Cu-MOR catalysts prepared via wetness impregnation tend to over-oxidize CH 4 to CO and CO 2 . Through systematic catalyst characterizations (XRD, TPR, UV–Vis, HRTEM, XPS), we elucidate that ion exchange mainly leads to the formation of zeolite-confined Cu 2+ species, while wetness impregnation predominantly results in CuO particles. Based on the catalytic performance, catalyst characterizations and in-situ FTIR spectra, we conclude that zeolite-confined Cu 2+ species serve as the active sites for plasma-catalytic direct oxidation of methane to methanol.
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高影响因子
ELECTROCHIMICA ACTA
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2026
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IF 5.6
Wei Lin,Yinghui Bian,Jintao Yao,Aocheng Yang,Lixin Yang,Hui Chen,Xuekui Xin,He Bian,Zichuan Lv
The composite material comprising copper phthalocyanine (CuPc) and graphene oxide (GO) is a novel functional material with broad application prospects in the field of electrochemistry. In this paper, a composite material consisting of copper coated with nitrogen-doped carbon supported on reduced graphene oxide (Cu@NC/rGO) was synthesized using CuPc/GO as the precursor through thermal treatment and carbonization processes. The porous Cu@NC/rGO composite not only provides abundant active sites but also constructs rapid ion transport pathways. Within the composite, Cu@NC nanoparticles act as effective electron transfer bridges, forming a continuous conductive network that reduces interfacial contact resistance. The hybrid dual-ion capacitor (HDIC) assembled with the Cu@NC/rGO composite material demonstrated outstanding cycling stability, achieving a discharge specific capacity of 328.6 mAh g -1 at a current density of 2.0 A g -1 after 4000 cycles. Density Functional Theory (DFT) calculations and electronic structure analysis revealed that the Cu@NC/rGO material exhibits the strongest adsorption capability toward EMIm + ions, with an adsorption energy as low as -299.02 kJ·mol -1 , accompanied by the most significant charge transfer. This work provides new design inspiration for the development of anode materials for HDIC.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Yuan Chen,Yanchen Sun,Gaojie Fang,Wenyao Huang,Quan Wang
The performance of energetic hydrogels—a promising class of water-resistant explosives—is often related to the internal microstructure and chemical reactivity. This study introduces a modification strategy employing copper (II) nitrate trihydrate (Cu(NO 3 ) 2 ·3H 2 O) to simultaneously tailor the hydrogel’s microstructure and enhance its chemical reactivity. The additive functions dually: by acidifying the system, it accelerates cross-linking kinetics and refines sensitized microbubbles; concurrently, it lowers the thermal decomposition barrier of the gel matrix. At an optimal content of 0.75 wt%, the proportion of effective microbubbles (diameter ≤ 100 µm) is maximized to 42.2 %, establishing a dense hotspot network. This microstructural and chemical optimization synergistically boosts detonation performance, increasing velocity by 15.34 % to 4610 m·s⁻¹ and reducing the minimum initiation charge from 50 g to 30 g. Thermal analysis confirms a reduced apparent activation energy and reveals a possible low-temperature exothermic pathway, providing direct evidence for the enhanced reactivity. Crucially, this enhancement does not compromise handling safety, as the initial decomposition temperature remains above 244 °C for all formulations. This work establishes additive-mediated modification as an effective route to engineer energetic materials by concurrently optimizing the microstructure and accelerating the reaction kinetics.
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FUEL
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2026
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IF 7.5
Zhenhua Ji,Zhongqiang Bao,Zihao Wu,Peng Zhang,Rui Yang,Ding Luo,Hao Chen
As the most effective after-treatment technology for NH 3 emission control in road vehicles, Ammonia Slip Catalyst still faces challenges such as insufficient catalytic activity and low selectivity to the reaction product N 2 . Especially, the performance bottleneck in anti-aging greatly limits the commercial application of the catalyst, and there are still research gaps. Based on this, this study aims to reconstruct the structure − activity relationship of the catalyst by directionally constructing TiO 2 with a multi − scale channel core − shell structure as the support based on introducing different contents of Pt and Cu dual active components, and to explore the regulation and improvement mechanism of the catalytic performance including anti − aging property under the multi − dimensional synergistic effect. The results indicate that by enhancing the mass transfer capability of the catalyst with three-dimensional mass transfer channels and the influence of the dual active components, Pt 5 -Cu 1 /TiO 2 with a Pt − Cu content ratio of 5:1 achieves the best catalytic activity and N 2 selectivity. The Density Functional Theory calculation results show that due to the relatively low free energy of the key intermediate HNO, the Pt content plays a dominant role in the formation of N 2 O. Based on the relatively low free energy of the key intermediate NH 2 and the sequential dehydrogenation order, the thermodynamic conditions for the N 2 formation pathway under the catalytic action of Cu are extremely favorable, with relatively small kinetic barriers. Compared with Pt, the NO X formation pathway under the catalytic action of Cu has a smooth energy decrease and is more likely to occur, but it is also affected by the complex competition in the synergistic effect of the dual active components. The 17.69 % content of Pt 4+ in the active components of the catalyst after aging is the main reason for the decline in activity. The thicker shell layer reduces the collapse of the core–shell structure at high temperatures, laying a stable structure–activity relationship foundation for maintaining high activity. The prepared Pt 5 -Cu 1 /TiO 2 still meets the emission regulation limits after aging, showing good anti-aging performance.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Zhimo Fang,Zhou Zhou,Xiaomeng Li,Dongyang Li,Bin Hu,Haoyu Wang,Lin Zhang,Qin Dai,Kai Li,Yao Kong,Shiguan Yang,Qiang Lu
Superexchange-mediated dual-acceptor sites enable spatial charge separation. • Synergistic single-atom and vacancy engineering creates multifunctional sites. • Cu SA -TO-O V delivered excellent corresponding turnover frequencies of 177.52 h −1 . • The photo-Fenton system exhibited wide pH adaptability and anti-interference. Synchronously and efficiently utilizing photogenerated electrons and holes remains a significant challenge in Fenton-like reaction. Herein, the Cu single-atom (Cu SA ) and oxygen vacancy (O V ) co-modified TiO 2 nanoflake-like catalyst is successfully synthesized. O V modulate the electronic coupling interaction, which is proposed to trigger superexchange -mediated electron transfer from Cu 3 d x 2 − y 2 to Ti 3 d xy via O 2 p y orbitals. Specifically, Cu SA serves as the hole-accepting site for 1 O 2 generation, while O V and Ti 3+ functions as the electron-accepting site for •OH production and contaminant adsorption. The substrate enrichment effect and the free radical/non-radical coupling interaction significantly enhances photo-Fenton catalytic performance, achieving superior sulfanilamide removal efficiency across a broad pH range (3–11) and a high turnover frequency of of 177.52 h −1 . This work not only highlights the potential of active site engineering in designing photo-Fenton catalysts but also advances the development of efficient and sustainable water purification solutions.
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COMPOSITES PART B-ENGINEERING
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2026
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IF 14
Haizhu Li,Fuyang Sun,Dinghua Hu,Changrui Wang,Qiang Li,Xuemei Chen
The heat dissipation bottleneck induced by the high-power density of electronic devices is a core challenge that limits their operational stability and long-term reliability. Herein, diamond-Cu and diamond-Al composites (DCC and DAC) were systematically investigated with respect to material preparation, performance characterization, and reliability under extreme environments. X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy analyses indicate the presence of W-derived carbide-containing interfacial regions and close contact between the diamond particles and the Cu and Al matrices. Among the investigated particle-size distributions and diamond volume fractions, maximum thermal conductivities of 793.9 and 775.8 W m −1 K −1 were obtained for the DCC and DAC, respectively, while the DCC exhibited a maximum flexural strength of 405 MPa. The DCC underwent interfacial electrochemical corrosion in an acidic salt spray environment with a pH of 3.5, resulting in a maximum degradation of thermal conductivity of 26.8%. A gold-nickel protective coating with a thickness of at least 3 μm effectively suppressed micro-galvanic corrosion and significantly enhanced the corrosion resistance of both DCC and DAC. Furthermore, the composites exhibited excellent structural and thermal stability under high/low temperature, damp heat, and vibration conditions. Infrared thermal imaging tests verified their excellent heat dissipation performance. At 16.7 W cm −2 , the DCC and DAC reduced the heat-source temperature by 88.1 and 66.9 K, respectively, relative to 70Si/Al, with thermal stabilization reached within approximately 300 s. The developed composites demonstrated stable thermal performance under the prescribed laboratory environmental and mechanical loading conditions, indicating their potential for high-reliability electronic thermal-management applications.
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CHINESE JOURNAL OF CATALYSIS
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2026
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IF 17.2
Bin Yang,Ouardia Akdim,Chengcheng Yuan,Ruina Li,Luo Yu,Hermenegildo García,Jiaguo Yu,Graham J. Hutchings,Panyong Kuang
The electroreduction of CO 2 to CO is fundamentally hindered by sluggish COOH intermediate formation and the competing hydrogen evolution reaction. Herein, we show that this challenge can be addressed through the dynamic in-situ reconstruction of a CuO/In 2 O 3 precursor under electrochemical CO 2 reduction conditions. By employing in-situ electrochemical spectroscopy techniques in combination with theoretical calculations, we demonstrate that the presence of In 2 O 3 facilitates the complete reduction of CuO to metallic Cu. This in-situ reconstruction produces electron-rich Cu-In 2 O 3 interfaces, characterized by a reduced work function and an upshifted Cu 3 d -band center, which promote CO 2 activation and the formation of COOH/CO intermediates. Those interfacial properties lead to a pronounced electronic coupling that endows the electrocatalyst with high CO 2 -to-CO selectivity at low potentials. Specifically, the optimised Cu/In 2 O 3 achieves CO Faradaic efficiency above 90% across −0.5 to −0.9 V vs. the reversible hydrogen electrode, reaching 97.6% at −0.6 V in a H-type cell, and sustains a high CO selectivity of 96.0% even at an ultralow potential of −0.2 V in a flow-cell configuration. These findings underscore the crucial role of electron-rich interfaces in directing CO 2 reduction with exceptional selectivity and activity toward CO formation.
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ACS Applied Materials & Interfaces
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2026
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IF 7.8
Simin Zhang,Suiting Ning,Xinran Hu,Zhangheng Lai,Wenzeng Zhao,Hailin Liu,Yichu Wu,Zhiquan Chen
As a mid-temperature thermoelectric material, CuGaTe2 features a distinctive crystal structure, environmentally friendly and high tunability, all of which contribute to its promising thermoelectric performance. However, due to its intrinsically low electrical conductivity and high lattice thermal conductivity, the thermoelectric performance of pristine CuGaTe2 is unsatisfactory. In this work, Cu-deficient Cu0.96GaTe2 was alloyed with different contents of AgSbTe2 via a combined approach involving melting, ball milling, and spark plasma sintering. The Cu-poor condition introduces Cu vacancies, thereby providing more hole carriers. AgSbTe2 alloying leads to a further increase in the carrier concentration. Despite of the decrease in carrier mobility, the electrical conductivity was evidently enhanced. On the other hand, Sb doping increases the density of states at the Fermi level, leading to enhancement of the Seebeck coefficient. Moreover, Cu vacancies and AgSbTe2 alloying both cause a significant decrease in sound velocity, thereby decreasing the lattice thermal conductivity to an ultralow value of 0.29 W m–1 K–1 at 743 K. Finally, the optimized (Cu0.96GaTe2)0.9(AgSbTe2)0.1 sample demonstrates the highest thermoelectric performance, achieving an average zT of 0.41, which represents a 215.4% improvement over pristine CuGaTe2. Its peak zT reaches 1.39 at 743 K, corresponding to a 124.2% improvement relative to pristine CuGaTe2.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Dali Wei,Zhejie Chen,Xuezhu Wang,Zhou Fang,Qianru Li,Junqin Yu,Xiaoyu Sun,Xuan Wang,Linxin Tian,Bo Tian,Jia Ge,Yu Yang,Weihong Tan
An oxidase-mimicking Cu-N/C single-atom nanozyme is developed for colorimetric detection of isoniazid (INH). • A H 2 O 2 -free “signal-off” sensing platform is established, enabling simplified operation and enhanced robustness. • A low detection limit of 0.16 μM is achieved, with successful validation in real-world samples and excellent agreement with HPLC. • Integration with a paper-based chip and a smartphone enables on-site INH detection. A colorimetric sensing platform based on Cu-N/C single-atom nanozymes (Cu-N/C SAzyme) was developed for the sensitive and selective detection of isoniazid (INH), a first-line anti-tuberculosis drug. The Cu-N/C SAzyme exhibits intrinsic oxidase-mimicking activity, generating hydroxyl radicals (⋅OH) and superoxide anion radicals (O 2 · − ) to synergistically oxidize colorless 3,3′,5,5′-tetramethylbenzidine (TMB) into its blue oxidized form (oxTMB) without the addition of H₂O₂. Upon introduction of INH, its strong reducing property rapidly reduces oxTMB and scavenges ·OH and O 2 · − radicals, leading to a concentration-dependent decrease in absorbance at 652 nm. The change in absorbance shows a good linear relationship with INH concentration over the range of 1–50 μM, with a detection limit of 0.16 μM. The method exhibits high reproducibility (RSD < 5%) and excellent selectivity, and has been applied to determine INH in pharmaceutical tablets and human serum samples, achieving recoveries of 95.1–104.7%. The proposed method shows good agreement with the standard HPLC method. Furthermore, a portable point-of-care testing (POCT) platform was established by integrating the Cu-N/C SAzyme with a paper-based chip and smartphone. This platform achieved a detection limit of 0.65 μM over the same linear range (1–50 μM), demonstrating its potential for on-site INH screening. Download: Download high-res image (146KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Junying Tian,Qingxia Guo,Tao Wei,Yongle Guo
The electrochemical CO 2 reduction reaction (ECO 2 RR) offers a route to convert CO 2 into value-added chemicals such as ethylene (C 2 H 4 ). However, this process is constrained by the low content and poor stability of Cu + species, which severely limits the selectivity for C 2 products. To address this issue, we designed CuCe-based oxide catalysts, tuning both the morphology of CeO 2 supports and the Cu loading to maximize the abundance of interfacial Cu + -O V -Ce 3+ motifs and thereby enhance both the content and stability of Cu + species. The resulting optimized catalyst, 10CuCe-S (CeO 2 nanospheres with 10 wt% Cu loading), achieves a C 2 H 4 Faradaic efficiency of 40.2% and a partial current density of 6.63 mA cm −2 at −1.2 V vs. RHE. Structural analyses confirm that the optimal support nanosphere structure and 10 wt% Cu loading give the richest Cu + -O V -Ce 3+ interfacial configuration, leading to a high Cu + density of 69.2% in the 10CuCe-S catalyst, which also exhibits excellent Cu + stability. In situ attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) reveals key intermediates (*COOH, *CO, *CHO, *COH) along with rich *COCO species on 10CuCe-S, indicating that abundant Cu + sites facilitate C-C coupling toward C 2 H 4 formation.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Yifei Liu,Defa Liu,Ying Yu,Zumin Wang,Ruziev Umidjon Abdimajitovich,Donaev Sardor Burkhanovich,Semencha Alexander Vyacheslavovich,Lei Wang,Lingbo Zong,Bin Li,Xufang Qian
Fe-Cu dual-atom sites were prepared through pre-coordination and ultrafast Joule heating. • FeCu-N-MCS displays a large E 1/2 , low H 2 O 2 yield and excellent stability. • FeCu-N-MCS suppresses H 2 O 2 accumulation through hydrogen peroxide reduction reaction (HPRR). • Cooperative interaction of dual-atom sites reduces the energy barrier of OH* desorption for 4e⁻ ORR. • Zn-air batteries achieve ultrahigh power density and remarkable charge/discharge stability. The oxygen reduction reaction (ORR) governs the power output and cycling lifetime of metal-air batteries. Fe-N-C single-atom catalysts are among the most promising precious-metal-free ORR electrocatalysts, but their durability is often compromised by H 2 O 2 generated through the competing two-electron ORR pathway, which can trigger Fenton reactions and radical-induced catalyst degradation. Herein, Fe-Cu dual-atom sites anchored on microporous carbon spheres (FeCu-N-MCS) are constructed through a pre-coordination strategy followed by rapid Joule heating. Combined experimental results and density functional theory (DFT) calculations reveal that the electronic coupling between Fe and Cu sites lowers the energy barrier of the rate-determining step for the four-electron ORR pathway. More importantly, the Fe-Cu dual-site configuration enables spontaneous hydrogen peroxide reduction reaction (HPRR) at Fe sites and significantly facilitates OH* desorption during HPRR, thereby suppressing H 2 O 2 accumulation and alleviating Fenton-type oxidative degradation. Consequently, FeCu-N-MCS delivers outstanding ORR performance with a half-wave potential of 0.91 V, a low H 2 O 2 yield below 2.91%, and 91.05% current retention after 100 h. Aqueous Zn-air batteries (A-ZABs) assembled with FeCu-N-MCS achieve a peak power density of 223.73 mW cm −2 and stable cycling for over 1200 h. FeCu-N-MCS-based Quasi-solid-state ZABs (QSS-ZABs) further exhibit an open-circuit voltage (OCV) of 1.52 V and a power density of 246.85 mW cm −2 . This work establishes a dual-atom-site strategy for coupling high ORR activity with H 2 O 2 -resistant durability, offering mechanistic insight into the design of robust precious-metal-free electrocatalysts for advanced metal-air batteries. Download: Download high-res image (220KB) Download: Download full-size image Fe-Cu dual-atom sites were prepared through pre-coordination and Joule heating. The incorporation of Cu sites into Fe-N-MCS not only reduces the energy barrier of the rate-determining step (RDS) to accelerate the 4e⁻ ORR pathway, but also enables spontaneous hydrogen peroxide reduction reaction (HPRR) to suppress H 2 O 2 accumulation and Fenton corrosion. Consequently, the assembled Zn-air batteries achieve remarkable power density and ultra-long cycling stability.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Xiudong Zhu,Wei Guo,Zhang Wei,Zhe Sheng,Xiongchao Lin,Deping Xu,Yonggang Wang
M 3+ controls phase evolution: Al/Ga form Cu-Co alloy; In 3+ leads to CuIn, CoIn 2 , In 2 O 3 separation. • Surface hydroxyls and bridged CO provide dual CHₓ sources for C 2+ OH formation. • Medium-strength basic sites and Cu + fraction, not total basicity, govern C 2+ OH selectivity. • Smaller M 3+ radius (Al 3+ ) strengthens metal-support interaction, enhancing dispersion and performance. The modulation of trivalent cations in layered double hydroxide (LDH)-derived catalysts provides an effective strategy for tuning the multifunctional active sites for higher alcohol synthesis. In this study, a series of layered CuCoM catalysts (M = Al, Ga, In) was synthesized via alkaline co-precipitation and evaluated for higher alcohols synthesis via CO hydrogenation. The results demonstrate that the introduction of M 3 + is essential for constructing the LDH precursor structure and significantly influences the phase evolution, morphology, textural properties, reducibility, surface basicity, and chemical states of the catalysts. Among the catalysts tested, CuCoAl exhibited the best overall performance, achieving a CO conversion of 35.60%, an ethanol selectivity of 39.97%, and a C 2 + alcohols selectivity of 73.47%. Structural characterization revealed that CuCoAl had the highest specific surface area and the most uniform dispersion of Cu and Co species, which favored the exposure of accessible active sites. CO 2 -TPD, XPS, and in situ DRIFTS results further indicated that CuCoAl contained abundant surface hydroxyl groups and a higher fraction of Cu + , which promoted the formation of formate species, facilitated non-dissociative CO insertion, and enhanced CH x generation through both formate hydrogenation and bridged CO dissociation on Co sites. The superior catalytic performance of CuCoAl is thus attributed to the synergistic effect of highly dispersed Cu-Co active sites, abundant surface hydroxyl groups, and optimized Cu + /Co interfacial functionalities. This study provides mechanistic insights into trivalent-cation regulation in LDH-derived CuCo catalysts and offers a rational strategy for the design of efficient catalysts for higher alcohol synthesis from syngas. Download: Download high-res image (174KB) Download: Download full-size image
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