NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 7
·2889-2897
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IF 2.5
Yanan Zhu,Yongchang Yang,Shiqiang Li,Chang Zhu,Zegang Qiu,Qianqian Zhu
The development of efficient materials for adsorption desulfurization has attracted much attention for the safety of humans and the ecosystem. Metal–organic frameworks have shown promise in removing organic sulfur compounds in liquid fuels, while another star material – MXene has rarely been applied in this field. In this study, Ti3C2Tx MXene/Cu-MOF composites with different MXene contents (3.3%, 6.7%, and 13.3%) were synthesized via an in situ precipitation method. Characterization showed that the Cu-MOF was successfully coated on the surface of Ti3C2Tx MXene and partially embedded between the MXene nanosheets, restraining the agglomeration of both MXene and the Cu-MOF. The optimal composite-3.3%MXene/Cu-MOF presented the largest surface area of 166.6 m2 g−1. Compared to MXene and Cu-MOF, 3.3%MXene/Cu-MOF exhibited an enhanced adsorption performance for methyl phenyl sulfide in the model fuel with an equilibrium adsorption capacity of 87.4 mg g−1. Furthermore, the effects of adsorption parameters, adsorption kinetics, adsorption isotherms, and the adsorption mechanism, and regenerative performance of 3.3%MXene/Cu-MOF were comprehensively discussed. A pseudo-second order kinetic model and the Langmuir adsorption isotherm were found to better explicate the adsorption behavior on 3.3%MXene/Cu-MOF, which exhibited a theoretical maximum adsorption capacity of 183.9 mg g−1. This work hopes to shed light on the material design for adsorption desulfurization.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Yanli Zhang,Jiale Zhao,Simeng Zeng,Zixuan Liu,Bo Wang,Fuhua Lin
In this paper, a novel Cu/F co-doping strategy is proposed to modify the electrochemical performance of Sr 2 Fe 1.5 Mo 0.5 O 6– δ (SFM) cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The pristine SFM, Cu-doped Sr 2 Fe 1.4 Cu 0.1 Mo 0.5 O 6− δ (SFCM) and Cu/F co-doped Sr 2 Fe 1.4 Cu 0.1 Mo 0.5 O 5.9− δ F 0.1 (SFCMF) powders were synthesized by acid-glycine combustion method, and the impacts of Cu/F co-doping on the performance of SFM cathode were investigated systematically. It's found that Cu-doped SFCM has higher oxygen vacancy content and electrical conductivity than the pristine SFM and Cu/F co-doped SFCMF cathodes. While the Coulombic force between B-sites metallic ions and oxygen ions are significantly weaken for SFCMF, enhancing the mobility of lattice oxygen. Due to the combined effects of Cu and F doping, SFCMF cathode exhibits the best electrochemical performance among all investigated samples. At 600 °C, the polarization resistant for SFCMF cathode is 1.79 Ω cm 2 , decreased by 43.71 % in contrast to the parent SFM cathode. These results indicate that Cu/F co-doping is an effective strategy to improve the electrochemical properties of perovskite cathode materials.
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Sustainable Materials and Technologies
·
2025
·
IF 9.2
Shiyu Huang,Deqi Fan,Chengxiao Zhao,Xin Li,Xiaofei Yang
The photocatalytic conversion of anthropogenic carbon dioxide (CO 2 ) into solar fuels using semiconductor nanomaterials represents a promising and sustainable approach to addressing both energy sustainability and climate change concerns. Developing highly efficient semiconductor-based photocatalysts to tailor reaction pathways of CO 2 reduction is the key to producing value-added products with desirable performance. Herein, we report a novel copper-doped indium oxide (Cu-doped In 2 O 3 ) nanostructure prepared via the electrospinning technique, followed by annealing to enhance photocatalytic CO 2 reduction. Our findings demonstrate that modifying the bulk In 2 O 3 with copper enables Cu-doped In 2 O 3 nanofibers to catalyze the CO 2 reduction reaction more efficiently. In situ FTIR spectra measurements were utilized to identify the reaction intermediates and gaseous products for validating the reaction pathway. Combined with in situ electron paramagnetic resonance (EPR) and vibrational spectroscopy measurements, which revealed that interstitial Cu doping induces lattice distortions and oxygen vacancy (O V ) formation, effectively enhancing visible light absorption, accelerating charge separation, and migration. Consequently, the optimized In 2 O 3 -Cu3% nanofiber photocatalyst demonstrated outstanding selectivity (100 %) and a CO production rate of 45.5 μmol·g −1 ·h −1 , which is approximately six times higher than In 2 O 3 . Mechanistic studies have indicated that O V defects serve as electron reservoirs to suppress the recombination of photogenerated charges, while simultaneously creating abundant CO 2 chemisorption sites in nanostructures.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuhan Fu,Yali Li,Yang Chen,Jidong Hu,Hai Liu,Jiawei Zhao,Shoukun Zhao,Hongyun Ma,Yujun Fu,Deyan He,Junshuai Li
The performance of aqueous zinc-ion batteries is frequently hindered by anode-related issues such as uncontrolled dendrite formation and side reactions. Metal–organic frameworks (MOFs), characterized by their highly ordered porous structures, remarkably large specific surface areas, and tunable active sites, offer a promising solution by regulating Zn2+ flux and promoting uniform Zn deposition. In this study, a Cu-MOF was synthesized in situ on carbon cloth (CM-C) and functioned as an ion-buffering layer within the battery. This innovative configuration significantly mitigates side reactions, achieving an extended cycle life of nearly 800 h at a high current density of 10.0 mA cm–2 (areal capacity: 10.0 mA h cm–2) and nearly 1200 h at 5.0 mA cm–2. After 2000 cycles at 5.0 mA cm–2, the battery demonstrated an average Coulombic efficiency of 99.3%. Additionally, the full battery containing CM-C demonstrated enhanced capacity and stability. This simple and novel structure provides new possibilities for enhancing the cycling stability of zinc-ion batteries.
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CHINESE JOURNAL OF CATALYSIS
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2025
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IF 17.7
Wanying Liang,Guangyue Xu,Yao Fu
Transition-state shape selectivity plays a crucial role in catalytic systems where reactants and products exhibit comparable molecular dimensions, as it restricts the accessible configuration space of reaction intermediates. Herein, we designed a Cu@MFI catalyst by encapsulating Cu active sites within the well-defined micropores of MFI zeolite through a pore confinement strategy. This architecture preserves the zeolite framework integrity while maintaining unhindered internal mass transport, thereby enabling precise spatial control over transition-state configurations. Employing furfural hydrogenation as a probe reaction, the metal-zeolite synergy in Cu@MFI endowed the catalyst with exceptional activity (100% furfural conversion) and quantitative selectivity (100% furfuryl alcohol) at 70 °C, sustained across a broad temperature window. Mechanistic studies reveal that the transition-state shape selectivity effectively prevented H 2 O interaction with the furan ring, offering valuable insights for other reaction systems seeking to exploit shape selectivity for specific transformations.
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Journal of Energy Chemistry
·
2025
·
IF 14.9
Chaoran Yang,Shuyu Liang,Cong Zhang,Tianyu Zhang,Wenfu Xie,Min Li,Qiang Wang
Copper (Cu)-based catalysts have demonstrated promising selectivity and activity in electroreducing CO 2 to multi-carbon (C 2+ ) products. Among them, oxide-derived Cu catalysts exhibit high selectivity for C 2+ products in the CO 2 electroreduction reaction (CO 2 RR). Cu chalcogenide-derived catalysts offer a promising approach to tune the electronic structure of Cu sites via surface reconstruction, thereby affecting the product distribution. However, the effect of in-situ anion dissolution, especially Se ions, on the electronic structure of Cu selenides at negative potentials remains overlooked, despite its potential to significantly affect catalytic activity. In this study, we developed a series of Cu selenide catalysts with varying Cu/Se ratios to optimize electronic structures and enhance CO 2 RR performance. Among them, Cu 1.8 Se, featuring Cu vacancies, exhibited the highest activity for C 2+ products formation and the highest C 2+ /C 1 products ratio, nearly 2–3 times greater than the others. This catalyst also demonstrated good stability over 38 h of electrolysis under −450 mA cm −2 , with a maximum C 2+ products Faradaic efficiency (FE) of up to 70 %. In-situ surface reconstruction analysis revealed Se loss and Cu + /Cu 2+ reduction of the initial Cu 1.8 Se catalyst, forming Cu/Cu x Se structures with Cu vacancies, identified as the real active sites. Density functional theory (DFT) calculations and in-situ infrared absorption spectroscopy confirmed that Cu vacancies play a critical role in stabilizing *CHOCO intermediates for C–C coupling while suppressing hydrogen evolution reaction and C 1 products formation. These findings highlight Cu vacancy engineering as an effective strategy for enhancing C 2+ selectivity in CO 2 RR.
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CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Yang Chen,Diwen Zhou,Yongli Chang,Hongqiao Lin,Yunzhao Xu,Yong Zhang,Ding Yuan,Lizhi Wu,Yu Tang,Chengyi Dai,Xingang Li,Qinhong Wei,Li Tan
CO 2 hydrogenation to CH 3 OH is of great significance for achieving carbon neutrality. Here, we show a urea-assisted grinding strategy for synthesizing Cu-Zn-Ce ternary catalysts (CZC-G) with optimized interfacial synergy, achieving superior performance in CO 2 hydrogenation to methanol. The CZC-G catalyst demonstrated exceptional methanol selectivity (96.8%) and a space-time yield of 73.6 g MeOH ·kg cat –1 ·h –1 under optimized conditions. Long-term stability tests confirmed no obvious deactivation over 100 h of continuous operation. Structural and mechanistic analyses revealed that the urea-assisted grinding method promotes the formation of Cu/Zn-O v -Ce ternary interfaces and inhibits the reduction of ZnO, enabling synergistic interactions for efficient CO 2 activation and selective stabilization of formate intermediates (HCOO*), which are critical for methanol synthesis. In-situ diffuse reflectance infrared Fourier transform spectra and X-ray absorption spectroscopy studies elucidated the reaction pathway dominated by the formate mechanism, while suppressing the reverse water-gas shift reaction. This work underscores the critical role of synthetic methodologies in engineering interfacial structures, offering a strategy for designing high-performance catalysts for sustainable CO 2 resource utilization.
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Nano Energy
·
2025
·
IF 17.1
Tong Li,Huiying Yang,Meiyuan Wu,Kelei Huang,Xiangchao Meng,Zizhen Li
Industrial nitrogen fixation processes, such as the Haber-Bosch and Ostwald processes, are energy-intensive and cause environmental issues. Here, a photothermal evaporation catalytic evaporator was constructed using a core-shell Cu/Cu 2 O (Copper/ Copper(I) oxide) catalyst supported on carbon foam (CF) for efficient overall nitrogen fixation under air. The evaporator utilized the localized surface plasmon resonance (LSPR) effect of Cu nanoparticles and the excellent photothermal conversion capability of CF. It could achieve a surface temperature of 362.2°C under full spectrum light intensity of 1500 mW·cm −2 . The gaseous reaction environment generated by this photothermal evaporator overcame the low solubility of conventional photocatalytic N 2 in water and enhanced mass transfer. The Cu/Cu 2 O interface promoted charge separation, and the hot carriers from Cu nanoparticles accelerated the activation of N 2 . Meanwhile, the charge transfer process between the interfaces (Cu 0 -e - →Cu + , O 2- -e - →OV (Oxygen vacancy), Cu + +e - →Cu 0 , O 2 filled OV) made it possible to ensure the structural integrity throughout the reaction cycle. Under air conditions, the evaporator yield rate of NH 4 + and NO 3 - reached 691.96 μmol g −1 h −1 and 423.87 μmol g −1 h −1 , respectively, surpassing most reported catalysts. In-situ X-ray photoelectron spectroscopy (XPS) and Density functional theory (DFT) calculations revealed that the interface of Cu/Cu 2 O facilitated electron transfer to N 2 , weakening the N N bond and lowering reaction barriers. This work demonstrated a synergistic photothermal-evaporation strategy for efficient nitrogen fixation, providing a sustainable pathway for overall nitrogen fixation in air.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hanjun Zhang,Jing Chen,Yuxin Shi,Yaoyue Yang,Xiaole Jiang
Regulating the local microenvironment of metal centers represents an effective yet challenging approach to enhance the catalytic performance of atomically dispersed transition metal-nitrogen-carbon (M–N–C) catalysts towards the oxygen reduction reaction (ORR). Herein, atomically dispersed Cu–N–C catalysts featuring with adjustable carbon vacancies/defects concentrations (Cu–N–C V –X) are fabricated using a simple molten-salt-assisted pyrolysis strategy. The optimized catalyst (Cu–N–C V -1000) exhibits superior ORR catalytic performance with a half-wave potential ( E 1/2 ) of 0.89 V versus the reversible hydrogen electrode (RHE) and a turnover frequency ( TOF ) of 5.01 e site -1 s −1 at 0.85 V, surpassing Pt/C and most recently reported single-atom catalysts. Theoretical calculations confirm that defects adjacent to Cu–N 3 site downshift the d-band center of active sites, facilitating the desorption of *OH intermediate and thereby significantly enhancing the ORR kinetics. Consequently, the Cu–N–C V -1000-based zinc-air battery (ZAB) delivers a peak power density of 175.0 mW cm −2 along with a high discharge specific capacity of 819.4 mA g -1 Zn . This work confirms that the deliberate creation of suitable defects is an effective approach to optimize the intrinsic ORR activity of atomic M–N x sites, providing new insights into the rational design of high-performance catalysts for practical metal-air batteries.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lisong Zhong,Ying Li,Lirong Zheng,Jian Sun,Zhaohui Jin,Linqi Shi,Pengcheng Zhao,Baoyu Qi,Liu Yang,Zhongwei Chen
The development of highly active and robust non-noble-metal catalysts for alkaline hydrogen evolution reaction (HER) is imperative for industrial anion exchange membrane water electrolysis (AEMWE). Herein, we construct a hierarchically multiphase heterostructure via a customized reduction strategy, featuring uniformly dispersed Cu and Ni metallic phases anchored onto a conductive isolated MoO 2 substrate (Cu/Ni@MoO 2 ). The catalyst achieves an ultralow overpotential of 140.7 mV at 1 A cm −2 in 1 M KOH, coupled with ampere-level operational stability exceeding 2000 h without degradation. In-situ Raman spectroscopy and theoretical analyses unveil that Cu-mediated interfacial engineering dynamically restructures interfacial water networks, reduces the water dissociation barrier and optimizes hydrogen adsorption energy. Impressively, the AEMWE device equipped with a Cu/Ni@MoO 2 cathode achieves the industrial-relevant current densities 1.74 A cm −2 and 3.61 A cm −2 at the voltages of only 1.8 V and 2 V (60 °C), respectively, while demonstrating exceptional durability with negligible voltage decay throughout 1000 h operation at 0.5 A cm −2 . This work presents a novel design strategy for high-current-density electrocatalysts, bridging atomic-scale insights and industrial hydrogen production requirements.
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JOURNAL OF THE ENERGY INSTITUTE
·
2025
·
IF 6.2
Peng Zhang,Guang-Hui Liu,Yao-Shun Wen,Yu-Hong Kang,Yang-Fan Yin,Sheng Li,Zhi-Xin Li,Zhi-Hao Ma
Morphology engineering plays a pivotal role in boosting catalytic performance over heterogeneous catalysis. However, although Y 2 O 3 (a rare earth oxide) has been found to possess various morphologies, including nanoplate (NP), nanosphere (NS) and nanorod (NR), the lack of understanding of its catalytic mechanism still limits its further application. Herein, catalytic mechanism of Y 2 O 3 morphologies in reverse water-gas shift (RWGS) reaction over Cu-based catalysts was systematically investigated. Although Y 2 O 3 morphologies don’t affect CO selectivity, it has a significant impact on CO 2 conversion and stability. Systematic characterization reveals that Y 2 O 3 morphologies not only can optimize the CO 2 adsorption capacity and Cu nanoparticles size to enhance catalytic activity, but also can regulate the metal-support interaction to improve catalytic stability. The order of activity and stability of the Cu/Y 2 O 3 catalysts from high to low is: Cu/ NP Y 2 O 3 > Cu/ NR Y 2 O 3 > Cu/ NS Y 2 O 3 . This work clarifies the morphological-performance relationship in rare earth oxide-Y 2 O 3 , providing a new approach for the design of high-performance Cu-based catalysts for RWGS reaction and promoting the application of morphology engineering in heterogeneous catalysis.
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CHEMICAL ENGINEERING COMMUNICATIONS
·
2025
·
IF 2
Lei Zhao,Xiaotong Dong,Haigang Zhou,Xu Wei,Zichao Yin,Zhikun Wang,Songqing Hu
To tackle the critical and multifaceted challenges of metal corrosion in oil and gas operations, a novel green corrosion inhibitor—copper-doped carbon dots (CuCDs)—was synthesized. The results demonstrate that CuCDs exhibit superior corrosion inhibition efficiency (84.20% at 150 mg/L) compared to non-copper-doped carbon dots (NCDs, 70.22% at 200 mg/L), with statistical significance confirmed by triplicate experiments (p < 0.05). Notably, CuCDs also show exceptional antibacterial activity against sulfate-reducing bacteria (SRB), achieving an 88% sterilization rate, which significantly mitigates microbial-induced corrosion. Electrochemical and surface analysis revealed that CuCDs form a denser protective layer on N80 steel, attributed to synergistic chemical and physical adsorption mechanisms. These findings highlight the dual-functional potential of CuCDs as a sustainable solution for simultaneous corrosion and microbial control in oilfield applications.
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