JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Dongfeng Sun,Yu Kang,Junwei Wang,Luo Huang,ShuKai Ding,Guohui Dong,Yanning Qu,Yuan Yu
Ammonia synthesis via photocatalytic nitrogen fixation is regarded as a green and sustainable alternative to the conventional Haber-Bosch process. Nevertheless, its practical application is greatly hindered by the chemically inert N N triple bonds and slow reaction kinetics. In this work, a Cu-doped TiO 2 /g-C 3 N 4 composite with a well-defined type-II heterojunction was synthesized through a facile wet-chemical method integrating low-temperature crystallization and in-situ molecular assembly. Characterizations confirm that Cu-TiO 2 nanoparticles are evenly immobilized on g-C 3 N 4 nanosheets, which effectively suppresses nanoparticle aggregation. On the one hand, Cu doping tunes the band structure of TiO 2 and introduces abundant oxygen vacancies, greatly promoting the adsorption and activation of N 2 molecules. On the other hand, the formed type-II heterojunction establishes an internal electric field, which broadens light response and accelerates the separation and migration of photogenerated charge carriers. Benefiting from the synergistic effect of Cu doping, oxygen vacancies and type-II heterojunction, the optimal Cu-TiO 2 /g-C 3 N 4 (CuTCN-2) achieves an outstanding NH 3 evolution rate of 91.14 μmol·g −1 ·h −1 with a quantum yield of 1.75% at 420 nm under simulated solar illumination. The activity is 7.6-, 3.4- and 34.1-fold higher than that of bare TiO 2 , single Cu-TiO 2 and pristine g-C 3 N 4 , respectively. This work reveals that the co-regulation of heteroatom doping, defect engineering and heterojunction construction can remarkably boost photocatalytic kinetics. It also provides a feasible design principle for high-performance photocatalysts toward solar-driven nitrogen fixation.
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Catalysts
·
2026
·Vol. 16
·期 8
·689
·
IF 4.5
Zhongqiang Bao,Yiwei Zhang,Zhenhua Ji,Zhenguo Li,Peng Zhang,Ding Luo,Zhanming Chen,Han Gao,Lei Zhu,Hao Chen
Supported Pt catalysts are highly active for the selective catalytic oxidation of ammonia (NH3-SCO), but their practical use is limited by poor N2selectivity and insufficient hydrothermal durability under high-temperature exhaust conditions. Herein, we report a composition-regulated high-entropy oxide interface strategy to stabilize Pt–Cu dual sites and steer NH3oxidation toward selective N2formation. A series of fluorite-type Ce-based high-entropy oxides, including CeZrLaPrYOx, CeSmLaPrYOx, and CeSnLaPrYOx, were constructed as thermally robust supports for Pt and Cu loading. Among them, PtCu/HEO-Zr calcined at 1000 °C exhibits the best NH3-SCO performance, achieving 90% NH3conversion at 260 °C while maintaining N2selectivity above 80% over a broad temperature window of 100–300 °C under a high weight hourly space velocity of 100,000 mL·g−1·h−1. More importantly, after harsh hydrothermal aging at 800 °C with 10 vol% H2O for 12 h, the catalyst shows negligible activity loss and nearly unchanged N2selectivity, demonstrating exceptional structural and catalytic robustness. Structural and surface analyses reveal that Zr incorporation optimizes the fluorite high-entropy lattice, increases oxygen vacancy concentration, promotes lattice oxygen mobility, strengthens surface acidity, and enriches active Cu2+species, thereby enhancing the interfacial cooperation between NH3activation and oxygen-assisted intermediate conversion. In situ DRIFTS further reveals that PtCu/HEO-Zr favors an Olat-assisted internal selective catalytic reduction pathway, in which adsorbed NH3is activated to -NH2species and subsequently reacts with lattice oxygen-derived intermediates to form N2O22−-like species that decompose into N2and H2O. Meanwhile, the formation of nonselective NOxand N2O products is suppressed. This work highlights high-entropy oxide-supported Pt–Cu interfaces as a promising platform for designing hydrothermally durable and N2-selective NH3-SCO catalysts.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2026
·
IF 3
Wenya Huo,Yike Kuang,Zhendong Sha,Jun Ding
p-Nitrophenol (p-NP) is a toxic and persistent pollutant commonly found in industrial wastewater, necessitating efficient and economically viable treatment strategies. In this work, we develop a low-cost and high-performance catalyst consisting of Fe-Cu-Cr mixed metal oxides supported on activated carbon (AC), synthesized through a simple impregnation-calcination method and applied for peroxymonosulfate (PMS) activation.Systematic optimization of preparation parameters revealed that HCl pretreatment of activated carbon, a ternary Fe-Cu-Cr composition, a 20 wt% metal loading, and calcination at 600 °C yield the highest catalytic activity, achieving p-NP degradation with Ct/C₀ ≈ 0.25 after 4 h. Notably, the total treatment cost can be maintained below 30 CNY per ton of wastewater, demonstrating a substantial economic advantage over reported catalytic systems. Mechanistic studies show that p-NP degradation follows a synergistic adsorption-catalysis pathway, wherein activated carbon enriches p-NP at the catalyst surface and multivalent metal oxides efficiently activate PMS to generate reactive oxygen species, primarily •OH. This work introduces a practical, scalable, and cost-effective catalyst design using earth-abundant metals, offering a promising avenue
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JOURNAL OF MOLECULAR STRUCTURE
·
2026
·
IF 4.9
Yu-Fen Zhang,Yi-Ping Tian,Si-Yu Tian,Xiao Wang,Ji-Jiang Wang,Long Tang,Er-Lin Yue,Xiang-Yang Hou
Developed novel electrochemical sensors with nano-sheet structured, addressing the low conductivity and poor stability of traditional MOFs in sensing applications. As far as we know, this is the first report. • Realized simultaneous determination of Cu²⁺ and Hg²⁺ with outstanding performance: wide linear range, low detection limit, rapid electrochemical response, excellent selectivity against interfering ions, good reproducibility, and long-term stability. • Comprehensively elucidated the sensing mechanism by integrating Laviron’s adsorption theory, involving the intrinsic electrochemical activity of MOF nanosheets and specific interactions between MOF crystalline frameworks and target metal ions. • Validated practical applicability in complex real matrices (seaweed food samples) with satisfactory accuracy and recoveries meeting international analytical standards, enabling on-site heavy metal monitoring. • Provided a rational design strategy for the development of high-performance MOF-based sensors, highlighting significant practical potential in food safety and environmental heavy metal detection. Heavy metal ion presence in food poses a severe threat to human and ecological health. It is important to achieve rapid, sensitive and efficient detection of heavy metal ions. Two novel electrochemical sensing platforms based on Ni-MOF1/GCE and Cd-MOF2/GCE modified electrodes were developed for discriminative simultaneous detection of Cu²⁺ and Hg²⁺ in seaweed food matrices. Two sensors exhibit significantly enhanced electrochemical performance compared to conventional MOF-based sensors, featuring a three-dimensional Nano-network structure and abundant accessible active sites. Under optimized differential pulse anodic stripping voltammetry (DPV) conditions, two sensors exhibited rapid responses, wide linear ranges (20–180 μM for Cu²⁺, 7–180 μM for Hg²⁺) for both Cu²⁺ and Hg²⁺, with low limit of detection (LOD, 3.00 × 10⁻⁹ M for Cu²⁺, 2.50 × 10⁻⁹ M for Hg²⁺). Benefiting from the structural characteristics, two sensors show highly selective, sensitive, long-term stability under real sample testing. Applications in real seaweed food samples demonstrated high recovery rates and validated the sensor’s reliability. A possible mechanism involving the electrochemical sensing of Cu²⁺ and Hg²⁺ was proposed by integrating laviron’s adsorption theory. This work provides superior sensors, offering promising prospects for Cu²⁺ and Hg²⁺ monitoring in environmental and agricultural safety. Ni-MOF1/GCE and Cd-MOF2/GCE sensors are constructed as electrochemical sensors with excellent simultaneous ultrasensitive determination performance for trace multiple Cu 2+ and Hg 2+ in food samples. Download: Download high-res image (420KB) Download: Download full-size image
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Energy Materials
·
2026
·Vol. 6
·期 8
·N
·
IF 11.9
Jianfang Zhang\u003Csup\u003E1,2,\u003C\u002Fsup\u003E,Jiapei Li\u003Csup\u003E2,\u003C\u002Fsup\u003E,Yan Wang\u003Csup\u003E1,\u003C\u002Fsup\u003E,Miao Han\u003Csup\u003E1\u003C\u002Fsup\u003E,Chuhao Luan\u003Csup\u003E2\u003C\u002Fsup\u003E,Shuai Xia\u003Csup\u003E1\u003C\u002Fsup\u003E,Cuiping Yu\u003Csup\u003E1\u003C\u002Fsup\u003E,Yucheng Wu\u003Csup\u003E1,3,\u003C\u002Fsup\u003E,Wenjun Zhang\u003Csup\u003E2,\u003C\u002Fsup\u003E
The development of efficient and durable electrocatalysts for industrial-level water splitting remains a critical challenge. Here we report a CuO-MoS2/MoO3 precatalyst that undergoes electrochemical reconstruction under working conditions to yield two distinct active phases: Cu-MoS2 for the hydrogen evolution reaction (HER) at the cathode and an optimized CuO-MoS2/MoO3 for the oxygen evolution reaction (OER) at the anode. In 1.0 M KOH, the reconstructed electrodes deliver remarkably low overpotentials of 35 mV for HER and 124 mV for OER at 10 mA cm-2, along with outstanding long-term durability, sustaining 500 mA cm-2 for 100 h. Combined in situ Fourier-transform infrared spectroscopy and density functional theory calculations reveal that Cu species not only enhance charge transport but also tailor the electronic structure to optimize intermediate adsorption and reorganize interfacial water into a strongly hydrogen-bonded network, thereby accelerating water dissociation and proton transfer kinetics. When assembled into an anion-exchange-membrane water electrolyzer, the system delivers 1.0 A cm-2 at a low voltage of 1.77 V and 80 °C, with stable operation for 500 h, substantially surpassing noble-metal benchmarks. Our findings offer an efficient and durable catalyst system for sustainable hydrogen production, as well as fundamental insights into catalyst reconstruction and interfacial water regulation that inform the rational design of electrocatalytic materials.
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Catalysts
·
2025
·Vol. 15
·期 7
·623
·
IF 4
Caidong Du,Wenwei Wu,Jiangtao Shang,Keyi Xiang
Methane (CH4) has attracted much attention regarding its use in electrochemical carbon dioxide reduction reaction (CO2RR) due to its high mass-energy density; however, the uneven adsorption of intermediates on copper sites by conventional Cu-based catalysts limits the selective production of CH4. The introduction of a second metal can effectively regulate the adsorption energy of intermediates on the Cu site. In this paper, a method of alloying Cu with oxyphilic metals (M) using rapid electrodeposition is presented; the synergistic effect of the bimetal effectively directed the reaction pathway toward CH4. The best Faraday efficiency for methane occurred in the optimized Cu30La20electrode, reaching 66.9% at −1.7 V vs. RHE potential. In situ infrared testing revealed that the *CHO intermediate—a critical species for the electrocatalytic conversion of CO2to CH4—was detected on the Cu30La20catalytic electrode. However, no *CHO intermediate was observed on the Cu20La30electrode. Instead, the characteristic peak of the *OCCHO intermediate associated with C-C coupling emerged on the Cu20La30catalyst. This indicates that the adsorbed oxygen-containing groups on lanthanum sites reacted with carbon-containing groups on copper sites to form C2products, serving as the primary reason for the shift in reduction products from methane to ethylene.
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Advanced Science
·
2025
·
IF 14.1
Siyao Cheng,Qinglin Zhou,Daohu Sheng,Wei Dong,Jinhu Dou,Yuanbiao Huang,Rong Cao,Aming Xie,Roland A. Fischer,Soumya Mukherjee,Weijin Li
Conduction and polarization are known to profoundly impact conductive metal–organic frameworks (c-MOFs) for their applications in electromagnetic wave (EMW) absorption. Albeit a few advances along c-MOF platforms in enhancing their EMW absorption performances, reticular modulation-led inter/intra-layer conduction and polarization loss remains an unmet challenge. To address this, a ligand substitution-guided bottom-up structural control strategy is introduced to study the depth of reticular modulation-led inter/intra-layer conduction and polarization loss in c-MOFs under an electromagnetic (EM) field. A family of triphenylene-X ligands (X = −NH 2 , −OH, and −SH) is harnessed to afford an isoreticular family of three Cu-based c-MOFs. Thanks to the distinct Cu─X bonds, such a platform allowed to systematically study the synergistic features of conduction and polarization loss in EMW absorption enhancement. One of the trio, Cu 3 (HITP) 2 (X = −NH 2 ; HITP, 2,3,6,7,10,11-hexahydroxytriphenylene) is identified with an optimal EM loss capacity under the EM field, achieving a record-high reflection loss of −63.03 dB in the effective absorption range of 3–18 GHz band. Setting up a new benchmark for EM loss among c-MOFs, this study introduces a way to leverage control in the charge mobility characteristics of Cu─X bonds relative to the dielectric losses at both molecular and atomic scales.
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ENERGY & FUELS
·
2025
·
IF 5.3
Chen Chen,Cengceng Du,Zhenyu Wang,Xin Chen,Yiming Wang,Na Ju,You Fu,Zilong Liu,Mingjie Jia,Shenyin Luo,Guangwen Xu,Junli Xu,Hong-bin Sun
The development of economical and efficient catalysts for the hydrogen evolution reaction (HER) is critical for achieving low-energy water splitting. This study demonstrates that self-supported Cu–Co–B/NF, synthesized via the one-pot NaBH4 reduction, is converted into the active species Cu–Co(OH)2 during the HER process. This in situ conversion was verified through XRD, HRTEM, XPS, and other characterization techniques. This noble-metal free catalyst exhibits exceptional HER performance. It requires overpotentials of only 32 mV and 148 mV to achieve the current densities of 10 mA cm–2 and 500 mA cm–2, respectively, and maintains stability for over 200 h at a current density of 200 mA cm–2. The density functional theory (DFT) calculations reveal that the Co(OH)2 holds the active site, while the introduction of copper optimizes both the hydrogen adsorption free energy (ΔGH*) and the d-band center, thereby enhancing the catalytic activity. More than water electrolysis, an Al–H2O battery employing Cu–Co–B/NF as the positive electrode achieves a high open-circuit voltage (1.29 V) and a maximum power density of 11.17 mW cm–2.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xi Wang,Fengyun Mao,Yun Gong
Prussian Blue Analogs (PBAs) stood out as promising candidates for sodium metal batteries cathode, leveraging their unique open-framework architecture, straightforward synthesis, and cost-effectiveness. However, PBAs were plagued by limited capacity arising from insufficient redox-active sites. Additionally, iodine cathode with high theoretical capacity (211 mAh g −1 ) suffer from poor practical performance due to the shuttle effect of polyiodides and slow kinetic conversion. The complex cathode to construct conversion reaction might be a better method to improve the capacity and easy to implement. Herein, we reported the design of a Cu-based PBAs/iodine composite cathode, where the PBAs framework serves as an iodine host and a conversion reaction mechanism via copper‑iodine coupling within PBAs cavities was established to enhance capacity. Various characterization results demonstrated that the Cu-based PBAs framework enabled favorable iodine encapsulation and facilitated Cu I coupling, enabling reversible conversion during charge/discharge progress. Density Functional Theory (DFT) simulations confirmed that the complexation of Cu-based PBAs with iodine represents a thermodynamically favorable process. Thereby, the assembled full battery achieved a high specific capacity of 276.4 mAh g −1 at 0.1 A g −1 and a capacity retention of 80.9 % after 1000 cycles at 0.3 A g −1 . This work introduced a novel Cu-based PBAs/iodine complexed conversion cathode, offering an innovative insight for the development of high-performance sodium metal batteries.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Luping Feng,Leikeqing Shen,Xueping Dang,Huaixia Chen
Copper 1,3,5-benzenetricarboxylate (Cu-BTC) holds promise for adsorption applications due to its high specific surface area, yet its aqueous instability severely restricts practical use. To overcome this limitation, a novel hydrophobic modification strategy using isopropyl alcohol (IPA) was developed to significantly enhance the structural stability of Cu-BTC in water. Capitalizing on this improved stability, the modified Cu-BTC-IPA was integrated with the conductive polymer 3,4-ethylenedioxythiophene (PEDOT) through electrodeposition copolymerization, creating a robust Cu-BTC-IPA@PEDOT composite coating for solid-phase microextraction (SPME). This developed coating enabled the establishment of a highly sensitive direct immersion SPME-GC-FID method for the efficient extraction and detection of six trace phenolic compounds. The resulting coating exhibited extraction capacities 2–8 times higher than the PEDOT and 6–40 times greater than the commercial PDMS coating. Adsorption mechanisms were elucidated through isotherm studies and electrostatic potential mapping. The established method exhibited low detection limits (0.01–0.08 μg L −1 ), a wide linear range (0.05–50 μg L −1 ), and was successfully applied to the analysis of five environmental water samples, yielding satisfactory recoveries ranging from 87.2 % to 117.9 %.
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Molecular Catalysis
·
2025
·
IF 4.9
Pai Peng,Tianhao Li,Yichun Cai,Yao Zhang,Zhuoxi Li,Zhao-Bin Ding,Qiang Chen
Selective hydrogenation of nitroaromatics to anilines is a kind of important reaction in pharmacy industry and fine chemical engineering. However, this reaction is restrained by lack of catalysts and reaction system with high efficiency, energy saving, environmental protection and high selectivity. Herein, Cu nanoclusters were successfully encapsulated into Silicalite-1 zeolite by in-situ hydrothermal synthesis with ligand protection to obtain Cu@S-1 catalyst. The catalyst showed an excellent selectivity of 98 % with substrate conversion of 100 % in the hydrogenation of p -nitrostyrene to 4-vinylaniline using ammonia borane as hydrogen source, which was due to the preferential adsorption effect of Cu@S-1 catalyst on the nitro group. The Cu@S-1 catalyst also exhibits good recycling performance and substrate compatibility.
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ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Tianlong Tan,Hai Liu,Wenlong Cao,Lei Yang,Shujing Ju,Caiyu Chen,Ewald Janssens,Guowei Han,Dachun Lu,Jue Wang,Qinfang Zhang
The electrochemical CO2 reduction reaction (CO2RR) is one of the most promising pathways to achieving carbon neutrality. However, in acidic electrolytes, the CO2RR tends to suffer from competitive hydrogen evolution side reactions. Alkaline electrolytes are typically employed to suppress side reactions and promote the formation of valuable multicarbon (C2+) products (e.g., ethylene(C2H4)). In this study, we fabricated surface-loaded copper cluster catalysts with particle sizes below 5 nm by magnetron sputtering and inert gas condensation in combination with cluster beam deposition. This approach enabled precise control over the catalyst surface structure, allowing for in-depth investigation of the synergistic effects between the catalyst microstructure and its catalytic microenvironment. We demonstrate that the Faradaic efficiency (FE) for CO2-to-C2H4 conversion exceeds 50% across a broad current density range of 50 to 180 mA cm–2 in a flow cell using 1 M KOH electrolyte. Compared with a pristine Cu/PTFE catalyst, the optimized Cu cluster catalyst not only exhibits a significant enhancement in FEC2H4 but also expands the effective current density range. Furthermore, finite element simulations combined with in situ Raman spectroscopy reveal synergistic interactions among interfacial species (e.g., *CO, OH–, and K+). Therefore, this study proposes a general strategy to regulate the dynamic evolution of catalytic interfaces through an initial nanostructure design, thereby opening a promising avenue for the selective conversion of CO2 to ethylene.
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