INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Jingting Sun,Shangshang Wang,Xingyu Liu,Huan Yu,Jiaming Li,Chao Liu,Qinfang Zhang,Zhigang Zou
Photocatalytic hydrogen production (PHE) technology has emerged as a sustainable approach to convert solar energy into hydrogen energy, exhibiting significant potential for clean energy applications. In this study, an ultrasonic-assisted method was adopted to fabricate S-scheme MoSe 2 /Mn 0.5 Cd 0.5 S (MoSe 2 /MCS) composites, where intimate heterostructures are formed through interfacial Mo–S bonds between MCS and MoSe 2 . The atomic-level Mo–S bonds establish charge transport pathways and enable directional control of charge transfer. The as-constructed S-scheme MoSe 2 /MCS photocatalysts exhibit two critical advantages: enhanced charge carrier separation rate and improved overall redox capacity. Under visible-light irradiation, the MoSe 2 /MCS composites significantly outperform pure MCS in PHE performance. The optimal 5-MoSe 2 /MCS composite demonstrates the superior PHE activity, achieving an apparent quantum yield value of 71.16 % at 400 nm and remarkable photocatalytic stability. Key characterization techniques, including (solution-based) time-resolved photoluminescence technique, theoretical calculation, photoelectrochemical measurements, were employed to elucidate the positive correlation between ion-carrier interaction and charge separation efficiency, thereby enhancing the PHE performance. Based on experimental analysis and theoretical calculation, a plausible PHE mechanism for the S-scheme MCS composites is revealed and discussed in detail. These findings provide valuable insights for designing high-efficiency S-scheme heterostructured composites with interfacial chemical bonds.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Jiaming Cheng,Yan Xu,Zhaopeng Liu,Zhenhua Li,Baowei Wang,Yujun Zhao,Xinbin Ma
A series of Mo-based catalysts supported on Ce1–xLaxO2−δ solid solution were prepared and performed in sulfur-resistant methanation. Characterization results suggested the formation of Ce1–xLaxO2−δ solid solution with a cubic fluorite structure. The correlation between the surface concentration of Ce3+ and oxygen mobility was well revealed. The higher oxygen storage capacity induced by La dopant enhanced the reducibility of the MoO3/Ce1–xLaxO2−δ during the sulfidation. Meanwhile, the presence of oxygen vacancy induced by Ce3+ prompted the sulfidation of Mo species, resulting in a higher dispersion of MoS2. The coupling between the CO hydrogenation and water–gas-shift (WGS) reaction is important for the sulfur-resistant methanation. The apparent methanation rate is easily determined by CO hydrogenation, and WGS reaction could provide more H2 for the CO hydrogenation. MoO3/Ce0.8La0.2O2−δ catalyst exhibited the highest activity in a broad temperature regime of 450–550 °C due to its high MoS2 dispersion and surface concentration of Ce3+.
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INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2022
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IF 4.804
Xin Lan,Zhi-Bo Li,He Zhang,Guo-Hua Zhang
Oxide dispersion-strengthened (ODS) molybdenum‑tungsten (Mo W) alloys are ideal materials for plasma-facing components of fusion reactors. In this paper, the effects of rare earth oxides (RE x O y ) Y 2 O 3 , CeO 2 and La 2 O 3 on the sintering behavior , microstructural and mechanical properties of Mo W solid solution alloys were investigated. The initial alloy powders were produced by spray drying combined with the two-step reduction method (composed of carbothermal reduction and deep hydrogen reduction steps), and the solid solution alloy with good mechanical properties was prepared by subsequent sintering. The results showed that the doping of rare earth oxides suppressed the grain growth of Mo W alloy, and thus improved the mechanical properties. Compared with CeO 2 and Y 2 O 3 , the doping of La 2 O 3 is more favorable to obtain dense and fine-grained Mo W solid-solution alloys. The doping of La 2 O 3 produced a larger Zener force and interfacial drag force, which effectively hindered the grain boundary migration and refined the grains. The microhardness and bending strength of Mo-30 W-1La 2 O 3 alloy reached the maximum values of 557 HV and 771 MPa.
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OPTICAL MATERIALS
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2026
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IF 4.3
Cong Zhang,Huidong Xiong,Zhonghao Zhao,Xiaoyu Sun,Jingliang Cheng,Chaxiu Guo,Huadong Liu
In response to the need for efficient elimination of methylene blue (MB) from dye-containing wastewater, a Mo, N-co-doped carbon quantum dot-modified BiVO 4 (5% Mo, N-CQDs/BiVO 4 ) composite photocatalyst was developed. Pristine BiVO 4 suffers from rapid charge carrier recombination and limited visible-light utilization. Introduction of Mo, N-CQDs establishes a synergistic enhancement mechanism: (1) Mo, N-CQDs act as electron mediators, improving interfacial charge separation and migration, as evidenced by reduced charge transfer resistance. Mo doping introduces impurity energy levels that trap electrons and retard recombination, while nitrogen doping enhances electron tunneling and reduces interfacial resistance. (2) UV-Vis DRS confirms bandgap narrowing and enhanced visible-light absorption. (3) Photoelectrochemical analysis reveals significantly enhanced photocurrent response and reduced charge transfer resistance, confirming improved charge separation efficiency. Under visible light, the composite achieved a degradation rate constant of 0.04089 min −1 toward MB, a 3.31-fold enhancement over pure BiVO 4 , with >95% removal within 80 min. Radical trapping identified superoxide radicals (·O 2 − ) and holes (h + ) as the predominant active species, with h + contributing ∼62% of the activity. The catalyst retained 88.65% of its initial efficiency after four cycles, demonstrating good stability. This study provides a viable charge-regulation strategy using multi-element co-doped carbon quantum dots for semiconductor modification, highlighting its potential in dye wastewater treatment.
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ACS Sustainable Chemistry & Engineering
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2026
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IF 7.6
Liming Chen,Wanjun Ou,Huijun Zhu,Wenbiao Zhang,Yuying Meng,Qingsheng Gao
The development of electrocatalysts that combine high activity with robust resistance to chlorine-induced corrosion remains a critical challenge for seawater electrocatalysis. Herein, we report a Mo-doped Ni3S2 (Mo-Ni3S2) bifunctional electrocatalyst grown in situ on nickel foam via a one-step hydrothermal method. In simulated seawater (1.0 M NaOH + 0.5 M NaCl), the optimal Mo-Ni3S2-50 catalyst exhibits exceptional bifunctional activity, requiring overpotentials of only 290 mV for the oxygen evolution reaction (OER) and 175 mV for the hydrogen evolution reaction (HER) to reach the current density of ±100 mA cm–2. More importantly, in situ characterizations reveal a dynamic equilibrium between Mo dopant dissolution and readsorption of molybdate species (MoO42–) during operation. This self-adaptive process not only enhances the OER activity by optimizing the reaction kinetics but also forms a chloride-repelling protective layer, endowing the catalyst with remarkable corrosion resistance and long-term stability (>300 h for OER at 100 mA cm–2). When assembled in an anion exchange membrane water electrolyzer (AEMWE), the Mo-Ni3S2-50∥Mo-Ni3S2-50 couple delivers excellent overall water splitting performance, requiring 1.7 V at 100 mA cm–2 and maintaining stable operation for over 165 h. This work elucidates a self-adaptive protection mechanism induced by Mo doping, offering a promising strategy for designing efficient and durable catalysts for practical seawater electrolysis and large-scale green hydrogen production.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Yaning Gong,Dingyu Qiu,Xingchen He,Junhui Shao,Najun Li,Dongyun Chen,Hua Li,Qingfeng Xu,Jianmei Lu
Hybrid HfO 2 -PMA subnanobelts are synthesized by cluster–nuclei co-assembly. • Subnanometer belt morphology enhances piezoelectric polarization response. • Hf-O-Mo interfacial orbital coupling enhances charge separation. • PMA redox pairs act as electron buffers for efficient CO 2 activation. • Dilute CO 2 is efficiently converted into syngas via piezocatalysis. Efficient piezocatalytic conversion of dilute CO 2 into syngas offers a sustainable route for industrial flue gas valorization, yet conventional piezoelectric materials are often constrained by lattice rigidity and rapid charge recombination under weak mechanical stress. Herein, we constructed ultrathin 1D HfO 2 -phosphomolybdic acid (PMA) hybrid subnanobelts (SNBs) via cluster-nuclei co-assembly. The subnanometer architecture and flexible morphology induce an intense polarization response by leveraging the piezoelectric size effect, enabling HfO 2 -PMA SNBs to achieve remarkable CO and H 2 production rates of 4.5 and 5.8 mmol g −1 h −1 , respectively. In-situ FTIR spectra and density functional theory (DFT) calculations reveal that the asymmetric Hf-O-Mo interfacial coordination induces spontaneous electron transfer from HfO 2 to PMA, constructing a robust built-in electric field. Concurrently, the reversible redox properties of PMA clusters further enrich interfacial electron density and facilitate CO 2 adsorption and activation through Hf-O-Mo coupling, lowering the formation energy barrier of the key *COOH intermediates. This interfacial electronic structure engineering strategy establishes a novel paradigm for mechanical-energy-driven CO 2 conversion and offers a new approach for designing emerging sub-nanometer piezocatalysts. Download: Download high-res image (202KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Ting Bian,Jingwen Zhang,Zheng Yang,Feitao Fan,Liuting Zhang,Shitan Yan,Petr Senin,Jie Yu
Designing affordable electrocatalysts that accelerate the oxygen evolution reaction and resist chloride corrosion is key for practical seawater electrolysis. A fan-like Mn–Co 3 O 4 @Mo–Co 3 O 4 core–shell heterostructure was synthesized, where vertically aligned Mn-doped Co 3 O 4 nanowires serve as structural ribs and conformal Mo-doped Co 3 O 4 nanosheets form the fan surface. Dual Mn/Mo doping creates oxygen vacancies and modulates the metal–oxygen electronic structure, boosting intermediate adsorption and OER kinetics, while the nanosheet–nanowire framework maximizes active sites and facilitates charge and mass transport. As a result, the catalyst delivers an overpotential of 220 mV at 50 mA cm −2 in 1 M KOH, outperforming other reference samples. In alkaline seawater, it maintains overpotentials of 252 and 289 mV at 50 and 100 mA cm −2 and exhibits negligible degradation over 120 h with nearly 100% Faradaic efficiency. These results demonstrate that synergistic electronic tuning and nano-architectural design enable robust electrocatalysts for efficient seawater electrolysis.
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Science China-Chemistry
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2026
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IF 9.8
Tang Ruixin,Li Xiaolin,Li Ying,Hao Qiuyan,Huang Wenjie,Liang Limin,Deng Yida,Zheng Xuerong,Liu Hui
The sluggish oxygen evolution reaction (OER) hinders efficient water splitting, with conventional adsorbate evolution mechanisms (AEM) facing inherent activity limitations. While the lattice oxygen activation mechanism (LOM) offers a promising pathway for enhanced activity, its practical implementation often grapples with stability issues, especially under industrial-level conditions. Herein, we report a novel ultrathin, bilayer high-entropy MoMnFeCoNiCu LDH nanosheet with a unique graphene-like wrinkled morphology. The strategic introduction of high-valent molybdenum triggers a fundamental shift in the OER mechanism from AEM to LOM, as unequivocally confirmed by in situ Raman spectroscopy and 18 O isotope gas-phase mass spectrometry. This unique Mo-triggered lattice oxygen activity leads to excellent performance: the catalyst achieves a remarkable 235 mV overpotential at 10 mA cm −2 in alkaline media, and maintains 500 h stability at 200 mA cm −2 . Crucially, when integrated into an anion exchange membrane water electrolyzer (AEMWE), our catalyst demonstrates excellent stability by maintaining consistent performance at an unprecedented 1.0 A cm −2 for 200 h, highlighting its immense potential for industrial-scale water electrolysis.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Ziyuan Li,Mingsheng Luo,Zihan Xu,Lingxin Chen,Yuanyuan Fang,Hao Sun,Minwei Yi,Yutong Liu,Yiduo Huo,Roshni Rahman
In this study, in situ assembled MOFs on Al2O3-supported catalysts were prepared to compare with the traditional Al2O3-supported catalysts promoted with Ga and Mo for CO2 hydrogenation to methanol reaction. Among supported catalysts, the 5%MoZnCu/Al2O3 catalyst exhibited the highest CO2 conversion and methanol selectivity, while the 2.5%Mo-modified catalyst demonstrated the best performance among MOF-composited catalysts. MOF compositing can enhance the surface area and pore size of the catalyst, yielding increased CO2 conversion at 230 °C and 3.0 MPa. Meanwhile, Mo modification enhanced the methanol selectivity. Characterization data from XRD, Raman spectroscopy, and BET surface area analysis revealed that the crystal structure, surface morphology, pore structure, and metal valence distribution of the active components were influenced by the metallic promoters. This study provides valuable insights into catalyst development for efficient CO2 hydrogenation to produce methanol.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yanxu Wang,Yinjie Zhou,Yaoqi Huang,Ge He,Lili Zhang,Mingwu Tan,Shaojun Yuan
Ammonia (NH 3 ) is a hazardous pollutant that poses significant health and environmental risks, necessitating efficient removal strategies. Schottky junction-enhanced photothermal catalytic oxidation offers a promising approach to address the limitations of conventional photocatalysis, including low solar energy utilization and suboptimal catalytic performance. Here, metal nanoparticles (Ni, Pd, Pt, Cu, Ag) were loaded onto Mo-doped TiO 2 to construct Schottky junctions, resulting in significantly improved NH 3 oxidation performance. Notably, Pt uniquely outperformed other metals due to its exceptional stability in maintaining a metallic state even after prolonged exposure. In-situ DRIFTS analysis revealed a distinct ·NH 2 pathway for NH 3 oxidation on Pt/Mo-TiO 2 , differing from mechanisms observed in other metal-loaded catalysts. Combined experimental findings and DFT analyses provided direct evidence of the relationship between chemical states of metals, Schottky junction formation, and enhanced electron-hole separation. This study offers valuable theoretical insights into Schottky junction-enhanced photothermal catalysis and highlights its potential for efficient NH₃ removal under solar irradiation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Xiao Xiao,Zhiyuan Wang,Zhengting Wang,Rui Gao,Yujie Xiang,Wen Ge,Qihang Zhou,Shukang Deng
Highly efficient, cost-effective, and durable electrocatalysts are crucial for scalable renewable hydrogen production via water electrolysis. Herein, a Ni 3 Se 2 –Mo@NiFe-LDH composite catalyst was synthesized through a hierarchical strategy combining two-step hydrothermal treatment and electrodeposition. The catalyst exhibits outstanding OER performance, delivering a low overpotential of 205 mV at 10 mA cm −2 and stable operation for 200 h. In this heterostructure, the conductive Ni 3 Se 2 core promotes electron transport, while the in-situ formed NiMoO 4 phase regulates the electronic structure to optimize oxygen intermediate adsorption. Meanwhile, the NiFe-LDH shell undergoes surface reconstruction during operation, forming an active oxyhydroxide layer that activates the lattice oxygen mechanism (LOM). Operando Raman spectroscopy and post-stability analyses (XPS, SEM, ICP-OES) verify the formation of the active phase and preserved structural integrity. The synergistic effects of electronic modulation and interfacial engineering accelerate charge transfer and reduce OER kinetic barriers, offering an effective strategy for developing high-performance non-precious-metal OER catalysts.
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INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2026
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IF 4.7
Feiyu Liu,Weiqiang Hu,Geng An,Kai He,Lu Yang,Jinli Chen,Gui Tian,Zongqing Ma
Different from the traditional single strategy of strengthening molybdenum matrix, we designed a full chain preparation process to regulate the Mo-TiC alloy matrix at three scales. Refining the grain size of traditional large-sized molybdenum alloy from >10 μm to <3 μm lays the foundation for high strength. Next, optimizing the dislocation distribution to generate subgrain boundaries at lower scales and layered structures of low/high defect grain regions at higher scales. The subgrain boundaries with high stability due to ultrafine grain pinning could first pin dislocations and indirectly slow down the dislocation accumulation at grain boundaries. Furthermore, the cracks restricted by layered structure tend to propagate longitudinally, which reduces local stress concentration and promotes further stress dispersion through long-distance plastic deformation. Based on the above factors, the Mo-TiC alloy possesses a combination of high strength (792.9 MPa) and excellent plasticity (26.2%), which provides a new perspective for preparing high-performance refractory alloys.
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