Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 27
·16592-16604
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IF 10.7
Yajuan Zhang,Hui Xu,Xingwei Shi,Yuanhai Bao,Yong Chen
Designing non-precious-metal catalysts with performance matching that of precious-metal catalysts is crucial to the development of clean hydrogen energy. Herein, construction heterostructures and heteroatom doping strategies have been employed to construct an amorphous CoPB deposited on a crystalline Cu2S/Ni3S2 nanosheet (CoPB@Cu2S/Ni3S2) non-precious-metal electrocatalyst for water electrolysis. The introduction of Cu2+ successfully gave rise to an Ni3S2/Cu2S crystal–crystal heterostructure, on which the coating of the amorphous CoPB layer finally achieves a triple heterostructure by an electroless plating technique. The optimized electronic structure and geometry allow the CoPB@Cu2S/Ni3S2 catalyst to show a competitive catalytic performance, which requires just 25 mV of overpotential for the HER and 247 mV for the OER to achieve a current density of 10 mA cm−2. When loaded into an AEM water electrolyzer, the CoPB@Cu2S/Ni3S2‖CoPB@Cu2S/Ni3S2 cell just requires 1.84 V cell voltage to offer a large current density of 2000 mA cm−2, running for more than 1000 h without significant degradation in performance. This work demonstrates the benefit of the integration of the heterostructures and heteroatom doping strategies to prepare catalysts and provides a scientific basis for the development of high-performance non-precious-metal water electrolysis catalysts.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
Journal of Magnesium and Alloys
·
2022
·
IF 11.813
Zhiqiang Lan,Huiren Liang,Xiaobin Wen,Jiayang Hu,Hua Ning,Liang Zeng,Haizhen Liu,Jun Tan,Jürgen Eckert,Jin Guo
Hydrogen is considered one of the most ideal future energy carriers. The safe storage and convenient transportation of hydrogen are key factors for the utilization of hydrogen energy. In the current investigation, two-dimensional vanadium carbide (VC) was prepared by an etching method using V 4 AlC 3 as a precursor and then employed to enhance the hydrogen storage properties of MgH 2 . The studied results indicate that VC-doped MgH 2 can absorb hydrogen at room temperature and release hydrogen at 170 °C. Moreover, it absorbs 5.0 wt.% of H 2 within 9.8 min at 100 °C and desorbs 5.0 wt.% of H 2 within 3.2 min at 300 °C. The dehydrogenation apparent activation energy of VC-doped MgH 2 is 89.3 ± 2.8 kJ/mol, which is far lower than that of additive-free MgH 2 (138.5 ± 2.4 kJ/mol), respectively. Ab-initio simulations showed that VC can stretch Mg-H bonds and make the Mg-H bonds easier to break, which is responsible for the decrease of dehydrogenation temperature and conducive to accelerating the diffusion rate of hydrogen atoms, thus, the hydrogen storage properties of MgH 2 are remarkable improved through addition of VC.
研究领域:
材料科学
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能源化学
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纳米技术
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催化化学
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计算材料学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2017
·
IF 3.582
Lingwei Lu,Shuang Ni,Gang Liu,Xiaoxiang Xu
The crystal structure of a photocatalyst generally plays a pivotal role in its electronic structure and catalytic properties . In this work, we synthesized a series of La/Cr co-doped perovskite compounds ATiO 3 (M = Ca, Sr and Ba) via a hydrothermal method . Their optical properties and photocatalytic activities were systematically explored from the viewpoint of their dependence on structural variations, i.e. impact of bond length and bond angles. Our results show that although La/Cr co-doping helps to improve the visible light absorption and photocatalytic activity of these wide band gap semiconductors , their light absorbance and catalytic performance are strongly governed by the Ti O bond length and Ti O Ti bond angle. A long Ti O bond and deviation of Ti O Ti bond angle away from 180° deteriorate the visible light absorption and photocatalytic activity. The best photocatalytic activity belongs to Sr 0.9 La 0.1 Ti 0.9 Cr 0.1 O 3 with an average hydrogen production rate ∼2.88 μmol/h under visible light illumination (λ ≥ 400 nm), corresponding to apparent quantum efficiency ∼ 0.07%. This study highlights an effective way in tailoring the light absorption and photocatalytic properties of perovskite compounds by modifying cations in the A site.
研究领域:
材料科学
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物理化学
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能源化学
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无机化学
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光催化
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DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 8
·725
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IF 4
Bingxian Zhu,Yachao Liu,Yue Yan,Hui Wang,Yu Zhang,Ying Xin,Weijuan Xu,Qingshan Zhao
Hydrogen energy is a pivotal carrier for achieving carbon neutrality, requiring green and efficient production via water electrolysis. However, the anodic oxygen evolution reaction (OER) involves a sluggish four-electron transfer process, resulting in high overpotentials, while the prohibitive cost and complex preparation of precious metal catalysts impede large-scale commercialization. In this study, we develop a FeCo-based bimetallic deep eutectic solvent (FeCo-DES) as a multifunctional reaction medium for engineering a three-dimensional (3D) coral-like FeOOH-Co2(OH)3Cl/NF composite via a mild one-step impregnation approach (70 °C, ambient pressure). The FeCo-DES simultaneously serves as the solvent, metal source, and redox agent, driving the controlled in situ assembly of FeOOH-Co2(OH)3Cl hybrids on Ni(OH)2/NiOOH-coated nickel foam (NF). This hierarchical architecture induces synergistic enhancement through geometric structural effects combined with multi-component electronic interactions. Consequently, the FeOOH-Co2(OH)3Cl/NF catalyst achieves a remarkably low overpotential of 197 mV at 100 mA cm−2and a Tafel slope of 65.9 mV dec−1, along with 98% current retention over 24 h chronopotentiometry. This study pioneers a DES-mediated strategy for designing robust composite catalysts, establishing a scalable blueprint for high-performance and low-cost OER systems.
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DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 18
·4401
·
IF 3.2
Jianxu Zhang,Jingwei Li,Weisheng Guan
Biomass reforming under mild conditions for synergistic hydrogen production, driven by renewable solar energy, has rapidly emerged as a promising strategy that not only enables the efficient reutilization of biomass but also facilitates the generation of high-purity hydrogen. In this work, ZnCdS (ZCS) nanoparticles and CoWO4(CW) nanocrystals were assembled via a solvothermal method to construct a ZCS/CW S-type heterojunction composite. The resultant materials’ physicochemical characteristics were methodically described. With lignin model compounds (PP-ol) and sodium lignosulfonate as substrates, the ZnCdS/CoWO4-10% catalyst demonstrated a significant generation of hydrogen activity, producing hydrogen at rates of 223.30 μmol·g−1·h−1and 140.28 μmol·g−1·h−1, respectively, according to experimental results. The formation of heterojunctions endows composite photocatalysts with higher hydrogen evolution rates compared to single-component catalysts. This is attributed to energy band bending at the interface of the heterojunction, which facilitates efficient charge separation while maintaining strong redox capabilities. High-value compounds like phenol and acetophenone were formed when the oxidation products in the post-reaction lignin model compound solution were subsequently analyzed using high-performance liquid chromatography. Additionally, a convincing mechanism for the catalytic reaction was suggested. It is expected that this study will offer a viable route for the creation of effective photocatalytic materials, high-value organic waste transformation, and sustainable hydrogen production.
研究领域:
材料科学
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能源化学
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环境催化
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可持续能源
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光催化转化
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2025
·
IF 7.5
Yu-Yang Cao,Yi Xiong,Xiao-Li Zhang,Xin-Xin Guan,Xiu-Cheng Zheng
Developing a convenient and environmental-friendly catalyst preparation method is of great significance, while the catalytic hydrolysis of ammonia borane (NH 3 BH 3 , AB) is an effective in-situ hydrogen production strategy but faces many challenges including the absence of practicable catalysts. In this study, Ru nanoparticles are tightly encapsulated into the framework of chitosan (CS)-derived carbon aerogel (CCA) through a facile ice-crystal template method combined with one-step direct calcination without using any additional chemical activators. The exciting coordination between Ru 3+ and the N/O-based functional groups of CS in aqueous solution, the hierarchical porous structure of CCA and the self-doped N/O favor the tight and high dispersion of Ru NPs, facilitate mass transfer, as well as improve the hydrophilicity of the resulting catalysts. Therefore, the resulting catalysts exhibit excellent activity and durability in the hydrolytic dehydrogenation of AB. Activated by the optimal [email protected] , the turnover frequency (TOF) and hydrogen generation rate (HGR) in the absence of any strong base are separately 136.6 min −1 and 30.3 × 10 3 mL min −1 g Ru −1 , and the apparent activation energy is 42.1 kJ mol −1 . Interestingly, the introduction of NaOH (2.0 M) can further significantly accelerate hydrogen release (TOF = 562.9 min −1 , HGR = 124.7 × 10 3 mL min −1 g Ru −1 ). Additionally, the kinetic isotope effect of 2.82 recommends that an O–H bond dissociation in water acts a dominant role in AB hydrolysis over [email protected] . This work develops a facile and environmentally friendly method for preparing supported metal-based nanocatalysts that can be effectively used in many reactions including AB hydrolysis.
研究领域:
材料化学
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纳米催化
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能源化学
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绿色化学
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氢能源
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Weisheng Yu,Fen Luo,Xiaojiang Li,Jingjing Tu,Xian Liang,Yan Xu,Zhiru Liu,Wenfeng Li,Jihao Zhang,Luxin Xiong,Huijuan Wang,Liang Wu,Tongwen Xu
Water dissociation (WD, H2O → H+ + OH–) occurring at the bipolar membrane (BPM) junction can be leveraged in water electrolyzers for green hydrogen production, enabling the anode and cathode reactions to operate in kinetically favorable pH environments. However, practical application of BPM-integrated membrane electrode assemblies (BPMEAs) in electrolyzers faces formidable challenges due to the sluggish WD efficiency and insufficient stability at the bipolar junction. Here, we develop a convenient serial spraying approach to fabricate an all-in-one BPMEA. This approach endows the BPMEA with a wrinkled bipolar junction and integrated membrane/electrode interfaces, expanding the active interfaces and thereby enhancing WD efficiency and mass transport within BPMEA. As a result, the BPMEA exhibits competitive pure water and asymmetric acid/alkali electrolyzer voltages of 3.25 and 2.69 V at a high current density of 3000 mA cm–2, achieving 32% and 23% savings in energy consumption. Moreover, the wrinkled architecture imparts physical reinforcement to the bipolar junction and membrane/electrode interfaces, leading to an appropriate durability at current densities of 500–1000 mA cm–2. This work provides insights into the performance degradation mechanisms of BPM electrolyzers, and the proposed all-in-one approach is applicable to a broader range of electrochemical applications beyond water electrolysis.
研究领域:
电化学
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能源材料
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膜科学
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氢能源
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催化
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Zixin Xie,Xihong Zu,Qianwei Lai,Yicheng Cao,Xueqing Qiu
Hydrogen production by biomass electrolysis offers a promising and sustainable route for producing green hydrogen and high-value utilization of biomass. However, this process consumes electricity and suffers from low anode Faraday efficiency of the organic electro-oxidation reaction. Herein, we develop a novel strategy that integrates a room-temperature, high-power lignin-derived aldehyde flow fuel cell (FFC) with hydrogen production, which converts the power-consuming electrocatalytic hydrogen production step into an electricity-generating process. The highly active Ag-Cu x O/CF (copper foam) electrocatalyst exhibits dual functionality of efficient electricity generation and simultaneous hydrogen production by catalyzing low-potential aldehyde group oxidation at the anode, which concurrently releases electrons and generates hydrogen. The Ag-Cu x O/CF electrocatalyst can significantly improve the electron transfer rate and catalytic conversion efficiency of the anode, attributable to its mixed Cu 0 /Cu + valence states, enlarged double-layer capacitance (C dl ), reduced interfacial resistance, and optimized adsorption capacity. The Ag-Cu x O/CF catalyst achieves ∼95 % benzaldehyde conversion and ∼98.4 % Faradaic efficiency for hydrogen production at 0.35 V RHE . Furthermore, the FFC based on Ag-Cu x O/CF electrocatalyst demonstrated excellent dual-functionality at room temperature, achieving both a power density of 173.5 mW cm −2 and a hydrogen production rate of 1.96 mmol cm −2 h −1 . The constructed FFC achieved a room-temperature power density threefold greater than the reported lignin-based power generation technology, while maintaining comparable hydrogen production rate to biomass electrolysis processes. This study provides a novel approach to reduce the cost of green hydrogen production and mitigate the global energy crisis.
研究领域:
电催化
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能源化学
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可再生能源
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氢能源
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生物质转化
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环境能源材料
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产品关联
DOI
高影响因子
Nature Sustainability
·
2025
·
IF 27.1
Li Yunlong,Yin Lichang,Liu Jianan,Qin Xiaolan,Lu Xingyu,Dai Xueya,Qi Ke,Yang Yongqiang,Qi Wei,Liu Gang
Integration of efficient value-added electrochemical oxidation with hydrogen evolution reaction presents a promising sustainable route for both hydrogen energy and the electrochemical refinery industry. However, the serious competition of oxygen evolution reaction (OER) with targeted oxidation reactions at high current densities forms a substantial hurdle for industrial application. Here we report a straightforward approach to inhibit OER side reaction by introducing a trace amount of Cu 2+ into the electrolyte for efficient glycerol oxidation reaction (GOR). Such a strategy enables improved Faradaic efficiency of glycerol to the target product formic acid from 62.2% (without Cu 2+ addition) to 99.3% at a high current density of 800 mA cm −2 . The underlying mechanism is that a reversible redox process of Cu 2+ /Cu + fully suppresses the formation of OER-active-phase hydroxy peroxide on the surface of GOR-active Co 3 O 4 catalyst. The current strategy also applies to other important electrochemical oxidation reactions, paving the way for developing efficient non-OER electrochemical oxidation reactions for various chemical conversion processes.
研究领域:
电化学
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能源化学
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催化化学
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氢能源
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绿色化工
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电催化
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可持续化学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Shanshan Shao,Zixuan Huang,Xiaohua Li,Weicheng Wang,Shiliang Wu
In this study, the impact of pre-reforming procedure on the intermediate products and the production of hydrogen in the two-stage steam reforming of bio-oil generated from pine sawdust was explored. The evolution of the intermediate products in the liquid and gas phase affected by the pre-reforming catalyst (red mud, dolomite, biochar) and pre-reforming temperature was investigated, as is impact of intermediate products on the hydrogen production. The findings indicate that dolomite was identified as the most effective pre-reforming catalyst due to its high CaO/MgO content, which promoted the Boudouard reaction more effectively than the Fe 2 O 3 in in red mud. Low-temperature pre-reforming (≤450 °C) was more beneficial than high-temperature pre-reforming (≥550 °C) at which coke precursors, including aromatic hydrocarbons and phenols were easily produced, leading to rapid catalyst deactivation. Liquid-phase intermediates were primarily composed of furans, phenols, and ketones, with ketones accounting for up to 55.63 %, which may be related closely to the greatly promoted ketonization by the alkaline Ca(OH) 2 produced via the combination dolomite and water at low temperature. Ketones were actually more favorable to the second-stage reforming over Ni-based catalysts, and the ultimate hydrogen yield reached 66.52 %. Due to the low inclusion of phenol and aromatic hydrocarbon intermediates less susceptible to carbon deposition, the catalyst could be more stable. The two-stage steam reforming of pyrolysis bio-oil can avoid catalyst deactivation and enhance the hydrogen production to a higher degree, accomplished by changing the intermediates components with varied pre-reforming catalysts and temperatures.
研究领域:
能源化学
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催化科学
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生物质转化
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氢能源
·
反应工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2016
·Vol. 41
·期 15
·6362-6368
·
IF 3.205
Di-Chang Zhong,Yue-Lei Mao,Xin Tan,Ping Zhong,Liang-Xian Liu
Chemical hydrogen storage, endowed with superiorities of safety and efficiency, has been regarded as one of the most promising approaches. The design and synthesis of metallic catalytic system is an key step for development of chemical hydrogen storate materials. In this paper, we report that RhNi nanocatalyst, formed by spontaneously alloying of well-dispersed Rh and Ni NPs , exhibits much higher performance in the catalytic dehydrogenation of hydrous hydrazine.
研究领域:
材料化学
·
催化化学
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纳米科学
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能源化学
·
氢能源
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·Vol. 43
·期 14
·7038-7045
·
IF 4.229
Rui Lu,Min Hu,Caili Xu,Yi Wang,Yun Zhang,Bin Xu,Daojiang Gao,Jian Bi,Guangyin Fan
Developing effective catalysts for hydrogen evolution from hydrolysis of ammonia borane (AB) is of great significance considering the useful applications of hydrogen. Herein, graphitic carbon nitride (g-C 3 N 4 ) prepared through the simply pyrolysis of urea was employed as a support for Rh nanoparticles (NPs) stabilization. The in-situ generated Rh NPs supported on g-C 3 N 4 with an average size of 3.1 nm were investigated as catalysts for hydrogen generation from the hydrolysis of AB under mild conditions. The Rh/g-C 3 N 4 catalyst exhibits a high turnover frequency of 969 mol H 2 · (min·mol Rh ) −1 and a low activation energy of 24.2 kJ/mol. The results of the kinetic studies show that the catalytic hydrolysis of AB over the Rh/g-C 3 N 4 catalyst is a zero-order reaction with the AB concentration and a first-order reaction with the Rh concentration. This work demonstrates that g-C 3 N 4 is a useful support to design and synthesis of effective Rh-based catalyst for hydrogen-based applications.
研究领域:
催化化学
·
能源材料
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纳米催化
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氢能源
·
反应动力学
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DOI
高影响因子
危险品化学品经营许可证（带存储）