Reaction Kinetics Mechanisms and Catalysis
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2026
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IF 2.1
Hu Yanan,Yang Dawei,Li Qiaoling,Yu Chengcheng
Herein, a Cr-doped Ni-Cu/(NiOH) 2 coating supported on nickel foam (Ni-Cu-Cr/NF) was fabricated via a facile one-step electrodeposition strategy and employed as an efficient electrocatalyst for the hydrogen evolution reaction (HER) in alkaline media. In 1 M NaOH, Ni–Cu–Cr/NF requires an overpotential of 30 mV to reach a current density of − 10 mA cm⁻ 2 and exhibits a Tafel slope of 55 mV dec⁻ 1 . These electrochemical results are associated with the combined effects of the multicomponent composition and an increased electrochemically active surface area (ECSA). The ECSA of Ni–Cu–Cr/NF is approximately 23.6 times that of Ni–Cu/NF. In addition, the catalyst maintains stable operation for 60 h during continuous electrolysis. This work presents a simple preparation method for the novel Ni-Cu-Cr/NF catalyst and systematically investigates the impact of Cr doping on enhancing catalytic performance, providing an effective strategy for the development of nickel-based alloy electrocatalysts. Graphical
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MATERIALS LETTERS
·
2026
·
IF 2.6
Ziqi Xu,Yuanbang Zhao,Ruoyu Wang,Haitao Ma,Yunpeng Wang,Hanying Wang
Copper-based materials are attractive for non-enzymatic glucose sensing due to their high activity and low cost. However, conventional powder-based electrodes often suffer from high interfacial resistance and limited active sites. Herein, we develop a facile strategy combining electrodeposition and anodization to directly fabricate self-supporting porous Cu₂O electrodes on copper foil. This binder-free electrode exhibits outstanding electrocatalytic performance, achieving a sensitivity of 946.19 μA·mM −1 ·cm −2 and a detection limit of 1.01 μM. Notably, it shows an exceptionally wide three-stage linear range (0.02–5.71 mM), covering physiological glucose levels in tears, saliva, interstitial fluid, and blood. The sensor also demonstrates excellent anti-interference ability and reproducibility, offering a promising approach for practical glucose detection.
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FUEL
·
2026
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IF 7.8
Aolue Yan,Yanhong Quan,Yan Li,Jun Ren
Cu aggregation has been a significant obstacle to promoting the catalytic performance of methanol dehydrogenation for the production of high hydrogen storage chemical methyl formate (MF). Catalysts composed of Cu with different loading ( x = 5, 10, 15, 20 wt%) supported on dealuminated mesoporous Y zeolite (mY-deAl) had been prepared by mechanical grinding method and used in methanol dehydrogenation for MF. 10Cu/mY-deAl with appropriate Cu loading exhibited the largest MF yield of 31.9%, which was approximately 30 times higher than that of Cu/mY of 1.0% under 280 °C and 0.2 MPa. The excellent behavior was proved to be attributed to the development of amounts of mesoporous allowing the Cu particle enter into as well as the formation of Al vacancies anchoring optimal amount of Cu, induced by the dealumination of Y. Furthermore, the closely linear relationships between Cu dispersion and TOF Cu , along with that between active Cu 0 concentration and MF selectivity were revealed. The less Cu loading could not provide enough active sites for the conversion of methanol (22.0%) even though having the best dispersion, while the excessive Cu loading would result in Cu aggregation in the mesopores deriving from the limit of Al vacancies. This contribution innovatively provided a kind of Cu supported Y catalyst and clearly elucidated the promotion mechanism of catalytic performance driven by the synergy of Al vacancies and mesopores in methanol dehydrogenation to MF.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Miao Miao,Qijie Jin,Yan Shao,Feng Zeng,Huanhao Chen
This study developed a ternary CuCoIn/Al 2 O 3 catalyst for the direct hydrogenation of CO 2 to ethanol. The incorporation of Co and In species created a synergistic effect that enhanced CO 2 interaction and activation. This synergy also modulated the electronic state of surface Cu atoms, increasing the proportion of Cu + species, which promoted the non-dissociative adsorption of CO and the formation of *HCOO intermediates. These changes significantly enhanced C C coupling, leading to the generation of key ethoxy intermediates. The optimized catalyst, with a Co/(Co + Cu) ratio of 0.08 and 1.5 wt% In loading, achieved over 90% ethanol selectivity among total alcohols at 260 °C, along with a relatively high ethanol production rate of 33.0 g EtOH kg cat −1 h −1 . This work presented an effective strategy for designing high-performance, non-precious metal catalysts for selective CO 2 -to-ethanol conversion.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Jiawei Wang,Jiacheng Li,Fumin Wang,Xubin Zhang,Shuai Liu,Shuai Niu,Liang Chen,Xu Wu
Stabilizing the Cu δ+ (1 < δ < 2) valence state during CO 2 reduction reaction (CO 2 RR) process is essential to enhance the C-C coupling and further promote the conversion of CO 2 into value-added C 2+ products. Herein, we propose a new strategy to stabilize the Cu δ+ under the synergistic effect of 4f orbital and oxygen vacancies (O v ) through the construction of Ce doped CuO with enriched O v via symbiotic strategy (CuCeO-O v ). Theoretical calculations and experimental results show the derived gradient orbital coupling O v -[Ce 4f-O 2p-Cu 3d] unit with Ce 4f as electron buffer as well as O v as electron supply station can facilitate the electron itinerancy during CO 2 RR process, which is beneficial to reinforce the Cu-O covalency and inhibit peroxidation of Cu δ+ , thus endowing CuCeO-O v with a highly active (Faradaic efficiency of C 2 H 4 reaches 51% at −1.3 V vs. RHE) and stable bidirectional self-regulating capability (the current density and FE of C 2 H 4 show virtually no attenuation even after 13 h) simultaneously. This work not only gives a profound insight to the synergistic effect of dopants and O v in metal oxides but also provides new guidance to structural design of high-performance insert materials.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122829
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IF 7.5
Peijun Li,Weicong Xu,Xing Wang,Chao Liu,Anze Ning,Qingwen Chen,WulejiasiI Aerxin,Tao Li,Haowei Huang,Rui Xiao
The electrochemical conversion of CO₂ into gaseous hydrocarbon fuels (CH₄ and C₂H₄) has become a prominent research focus, relying heavily on high-performance catalysts. In this study, commercial pure Cu foil was etched with FeCl₃, utilizing a simple etching approach to alter the etching time (30 s, 60 s, 90 s, and 120 s) to reconstruct the Cu foil surface and form active centers such as grooves and cube-like Cu nanoparticles. The hydrogenation of the *CO intermediate and C–C coupling were facilitated by these features, thereby promoting the formation of gaseous hydrocarbon products during CO₂ electroreduction. By varying the etching time, the groove morphology and the size, surface area, and roughness of the cube-like Cu nanoparticles were systematically tuned. The Cu foil electrode etched for 60 s exhibited the highest surface area and roughness, together with cube-like Cu nanoparticles of approximately ∼43.89 nm, thereby providing optimal active sites for *CO adsorption and selective hydrocarbon formation. At −1.2 V versus RHE, a total hydrocarbon Faradaic efficiency (FE) of 64.94% was achieved, including 33.34% for CH₄ and 31.60% for C₂H₄. These results demonstrate an effective strategy for promoting selective hydrocarbon production during CO₂ electroreduction.
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ADVANCED FUNCTIONAL MATERIALS
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2026
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IF 19.9
Xiangji Zhou,Zhilong Zheng,Jian Zhang,Jiapeng Ji,Xiaolong Zhang
The precise control of product selectivity in the electrochemical CO 2 reduction reaction (ECR) toward specific multi-carbon (C 2+ ) compounds remains a significant challenge. This work demonstrates that incorporating germanium (Ge) into copper (Cu) nanoparticles to form a solid solution effectively tunes the surface electronic states of Cu, thereby steering the C 2+ product distribution from ethylene toward ethanol. First-principles calculations predict that an optimal Ge content (Cu 94 Ge 6 ) optimizes the Cu 3d orbital hybridization and shifts the d-band center, strengthening the adsorption of the critical * CH 2 CHO intermediate and favoring its hydrogenation pathway. Experimentally, the Cu 94 Ge 6 catalyst exhibits an ethanol-to-ethylene ratio of ∼1.8, significantly higher than that of pure Cu (∼0.6). Comprehensive characterization, including in situ ATR-FTIR and quasi in situ XPS, reveals that the Ge-induced electronic modulation enhances the adsorption of COCHO/CH 2 CHO intermediates and promotes the presence of isolated interfacial water, which collectively facilitates ethanol formation. This study presents a viable strategy for regulating C 2+ product selectivity through solid-solution electronic engineering in Cu-based electrocatalysts.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Jiaqi Yang,Kexuan Gao,Yiran Chai,Nigel J.D. Graham,Li-an Hou,Yu Yang
The development of multifunctional catalytic membranes that concurrently enable rapid contaminant degradation, antifouling resistance, and long-term operational stability remains a critical challenge in advanced water treatment. Here, we describe the preparation and testing of a rationally engineered bimetallic CoCu catalyst, anchored onto graphitic carbon nitride (g-C 3 N 4 ) via a glucose-mediated cascade anchoring method (CoCu-CN), and immobilized on to an alumina ceramic membrane (CoCu-CN/M). Atomic-level characterizations revealed the coexistence of surface Co N 4 species and bulk Co Co coordination, and the electron-donating effect of Cu species stabilizes Co in an absolutely reduced state (Co 0 /Co-N 4 ). This bimetallic configuration optimized the peroxymonosulfate (PMS) adsorption configuration ( E ads = −3.05 eV) and facilitated O O oxygen bond cleavage ( I O O = 1.477 Å), thereby accelerating the generation of reactive oxygen species, including SO 4 − , O 2 − , and 1 O 2 . Consequently, the CoCu-CN system achieved complete degradation of a target pollutant carbamazepine (CBZ), with a reaction rate constant (k obs ) of 0.755 min −1 , corresponding to 158.9-fold and 3.23-fold enhancements compared to the monometallic Cu-CN and Co-CN systems, respectively. The CoCu-CN/M membrane demonstrated a high permeability (404.72 LMH/bar), sustained >98% CBZ removal over seven cycles, and exhibited strong antifouling performance. In surface water, the novel membrane maintained >95% degradation efficiency over 72 h of continuous operation, confirming its long-term stability. This study provides atomic-level insights into bimetallic catalytic activation and proposes an effective membrane-based solution for advanced water treatment.
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Biosensors-Basel
·
2026
·Vol. 16
·期 4
·217
·
IF 6.2
Jiang-Shan Chen,Huan Zhu,Tong-Qing Chai,Feng-Qing Yang
Laccase plays an important role in the detection and degradation of phenolic compounds, but it is limited by its cost and stability. In this study, the laccase-like property of copper peptide (GHK-Cu) has been revealed. In terms of enzymatic reaction kinetics, GHK-Cu has aVmaxof 1.735 × 10−4mM·s−1and aKmof 0.061 mM, demonstrating good substrate affinity and excellent catalytic efficiency. Then, a colorimetry was developed for rapid detection of epinephrine (EP) and 2-aminophenol (2-AP). The linear response range of EP is 20–240 μM, with a limit of detection (LOD) of 9.5 μM. The linear response ranges of 2-AP are 14–100 μM (in ultrapure water) and 2–120 μM (in seawater), with LODs of 2.56 μM and 1.65 μM. In addition, combined with a smartphone platform, a cotton-based sensor has been developed for the detection of 2-AP in seawater. The linear response ranges are 0–0.2 mM and 0.2–1 mM, with LOD of 0.033 mM. The structure of GHK-Cu provides a reference for the development of novel laccase mimetic enzymes. The constructed colorimetry offers an option for the rapid detection of phenolic compounds, and the developed cotton-based sensor enabled rapid and portable detection of 2-AP.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Zhencheng Meng,Lijiao Ding,Yan Sun,Yan Gu,Xiangyang Liu,Linbin Jiang,Kaleem Ahmad,Chunlei Wan,Jia Liang,Shibin Yin
There is a big challenge in simultaneously optimizing the Seebeck coefficient and electrical conductivity to improve thermoelectric performance. Herein, an interfacial engineering strategy is employed to decouple thermoelectric properties in solution-processable MoS 2 /Cu nanocomposites. Specifically, a facile electrochemical method enables the exfoliation of natural molybdenite into high-quality nanosheets and the concurrent in-situ decoration of Cu nanoparticles. Within the MoS 2 /Cu heterostructure, the Cu nanoparticles act as electron donors to regulate the carrier concentration. Crucially, Cu nanoparticles also establish robust conductive bridges between adjacent MoS 2 nanosheets, leading to a highly continuous conductive network with high carrier mobility. Furthermore, the constructed MoS 2 /Cu heterointerfaces introduce strong energy filtering to preferentially scatter low-energy carriers and transport high-energy carriers, effectively improving the Seebeck coefficient. Consequently, the all-inorganic flexible film achieves an outstanding room-temperature power factor of 293.8 μW m −1 K −2 . Furthermore, a MoS 2 /Cu-based flexible thermoelectric generator exhibits highly efficient photo-thermo-electric energy conversion. Under simulated AM 1.5 G (1 sun) illumination, the device establishes a stable temperature difference of approximately 12.3 ℃ and an open-circuit voltage of 9.5 mV. This work highlights the profound efficacy of rational interfacial design in developing high-performance, scalable flexible thermoelectric materials for advanced energy harvesting applications.
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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
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2026
·
IF 7
Chen Liu,Xue Zhou,Hanyu Bai,Yana Zhang,Yong Zhao,Xuegang Li
Beta-actin (ACTB), a highly conserved cytoskeletal protein, is frequently dysregulated in early-stage malignancies, making its sensitive and specific detection crucial for cancer screening. Here, we develop a reflective fiber-optic SPR biosensor functionalized with copper–glycine engineered WS₂ nanosheets for label-free ACTB detection. The Cu–glycine modification not only enables WS₂ surface amination for efficient antibody conjugation, but also introduces Cu²⁺-mediated near-infrared absorption to amplify the plasmonic resonance response. Combined with the intrinsically large surface area and high refractive index sensitivity of WS₂, this synergistic design markedly enhances both molecular binding and signal transduction. The resulting WS₂-NH₂-based sensor achieves a refractive index sensitivity of 1467.5 nm/RIU, representing a 1.67-fold enhancement over unmodified fiber probes. For ACTB detection, it delivers an ultralow detection limit down to 9.766 pM, a broadened linear range of 2.4–120 pM (5×expansion), and a biosensing sensitivity of 84.477 nm/nM (1.4× improvement). Furthermore, at 1 ng/mL, a rapid response time of 20 min is achieved, demonstrating applicability for trace-level biomarker screening. Integrating high sensitivity, broad dynamic range, amplified spectral response, and strong anti-interference capability, this plasmonic WS₂-NH₂-modified fiber platform enables highly selective, label-free ACTB quantification. These findings highlight its strong potential for early cancer diagnosis, biomarker monitoring, and precision medical applications.
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JOURNAL OF HAZARDOUS MATERIALS
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2026
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IF 10.6
Jiabai Cai,Wenjia Huang,Jieyi Gong,Jiaqing Huang,Huan Li
Catalytic air oxidation of refractory organic wastewater often faces limitations such as low efficiency and high energy consumption. Herein, by encapsulating size-tuned copper nanoparticles (NPs) within porous Al 2 O 3 and finely optimizing the associated Cu(I)/Cu(II) ratio, we realized a catalytic mechanism that synergistically leveraged spatial confinement and a low-temperature thermal induction effect (LTIE). Porous-Al 2 O 3 -enabled spatial confinement improved surface crystallinity and effectively suppressed copper NPs aggregation. Compared to the high energy required by gas-phase O–O bond homolysis (∼5.16 eV), O–O activation on the Al 2 O 3 @Cu catalyst required dramatically less energy (∼0.1 eV) owing to efficient charge transfer. Under low-temperature conditions, the LTIE promoted hot-electrons generation and transfer, thereby enabling the cascade production of reactive oxygen species (including · OH, · O 2 ⁻, and 1 O 2 ), resulting in exceptional performance in the catalytic air oxidation of refractory organic pollutants. In batch experiments, the LTIE caused an 86% reduction in ultraviolet absorbance at 254 nm for actual biogas slurry at 90°C within 5 h. Further, a continuous bench-scale system demonstrated an average chemical-oxygen-demand removal rate of 92%, compliant with wastewater treatment standards. This study presents an efficient strategy integrating spatial confinement, electron transfer, and thermal activation to achieve complete mineralization of refractory organic pollutants in wastewater.
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