INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Yantong Long,Guoliang Zhao,Liuxin Yang,Yuxuan An,Yongjun Xu,Chen Xu
Efficient hydrogen/oxygen evolution reactions (HER/OER) bifunctional catalysts are critical to the overall water splitting efficiency. In this paper, a 1D rod-like structure bifunctional catalyst was firstly prepared, with ultralow Ru (1.19 wt%) loaded into CoNi bimetallic phosphides derived from 1D MOF-74-CoNi nanorods . Due to the strong interface interaction between Co and Ni bimetals which tunes the electronic structure and the Ru loading which increases the number of active sites of the catalyst, the electrocatalytic performance for both HER (8.7mV@10 mA cm −2 ) and OER (179.4mV@10 mA cm −2 ) under alkaline condition were significantly improved. The cell voltage of the full water splitting device assembled by the catalysts was only 1.47 V to achieve 10 mA cm −2 . The rational materials design of 1D rod-like structured bimetallic phosphide catalysts in this work may suggest a new strategy for the preparation of other bifunctional electrocatalysts .
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 13
·11336-11344
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IF 2.324
Qiu Zhilei,Tian Xuemin,Li Yan,Zeng Yan,Fan Chao,Wang Mengjun,Hua Zhongqiu
In this paper, WO 3 nanosheets were prepared by an acidification method and Ru catalyst was loaded on the surface of nanosheets through a conventional impregnation process. NH 3 gas sensors based on the neat and Ru-loaded WO 3 nanosheets were fabricated by the scree-printing technique and their sensing properties to NH 3 were investigated. The morphologies and surface structures of neat and Ru-loaded WO 3 nanosheets were analyzed. It is revealed that WO 3 nanosheets have an irregular flake shape and Ru catalyst is found on the surface of nanosheets with an oxided state. It is also found that the sensor response of WO 3 is greatly improved by the loading of Ru. Based on the power-law response of oxygen and TPR results, the sensitization mechanism of Ru is explained. It is proposed that the introduction of Ru promotes the catalytic activity of WO 3 and in turn modulates the reaction route of NH 3 with oxygen adsorbates on the surface, which inhibit the generation of nitrogen oxides and consequently reduces the competitive adsorption with oxygen during the sensor responses.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
FUEL
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2024
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IF 6.7
Yizi Qiu,Yuhan Ai,Weiyu Luo,Shuyao Li,Yimin Chen,Shun Yi,Kaixin Li,Yonggang Min
Selective transformation of lignin and its model compound is an efficient process for the valorization of lignin to valuable biofuels and chemicals. Here a series of Ru-loaded biochar (BC) catalysts from different biomass waste were developed and applied for the hydrolygenolysis of three lignin model compounds and alkaline-treated lignin, providing both maximum sustainability and economical profitability. The BC from bamboo waste with Ru loading (designated as Ru/BABC) was found to exhibit superior catalytic performance among all the carbon catalysts, giving complete conversion of model compounds and selectivities of 80.8 %, 86.0 %, 88.8 % of monocyclic products from diphenyl ether (DPE), benzyl phenyl ether (BPE) and phenethoxybenzene (PPE) respectively. Ru/BABC also exhibited excellent stability as evidenced by the 5-time recycling experiment with minimum Ru leaching. The reaction pathways for the hydrogenolysis of three model compounds were established to reveal the catalytic mechanisms of Ru/BABC and their promotions on the product selectivity. The superiority of Ru/BABC is supposed to result from its excellent porosity, a diversity of functional groups on the support and extremely high adsorption energies for the reactants which are revealed by DFT calculations. This work aims to provide some guidance for the development of BC catalysts from biomass waste, and to shed some clues on the catalytic transformation of lignin into value-added products.
研究领域:
化学工程
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环境科学
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催化科学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2021
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IF 1.134
Rui-Jie WU,Xue-Min TIAN,Zhong-Qiu HUA,Ning LU,Pan WANG
Catalyst based on Ru loaded HZSM5 zeolite is prepared by a wet impregnation method, which is screen printed onto alumina substrates and serves as sensitive materials for the catalytic combustion sensor. The results show that Ru-HZSM5 catalyst has a high catalytic activity to combustible gases such as hydrogen (H 2 ) and carbon monoxide (CO) at low temperature. However, a poor dispersion of Ru reduces the catalytic activity of the catalyst when the Ru loading is too high. It is due to the pore structure of the sensitive material which facilitates the acquisition of high dispersion characteristics and gas selective regulation. The catalytic sensor based on Ru-HZSM5 also has high selectivity for combustible gases. Due to the low operating temperature, the sensor has a high selectivity for combustible gases and no cross-response to interfering gases such as ammonia (NH 3 ) and volatile organic compound (VOCs). Therefore, the catalytic type gas sensor with low power consumption and good selectivity can be used for monitoring CO, H 2 and other combustible gases.
研究领域:
材料科学
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传感技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Qinrui Sun,Ning Wang,Guihua Liu,Jingde Li,Xiaohang Du,Shujuan Sun
Dimensionally stable RuO 2 -based anodes have achieved excellent performance in the field of electrochemical treatment of wastewater, however, the high price of Ru hinders its industrial application. Herein, TiO 2 nanotubes-supported RuO 2 with ultralow Ru loading (0.34 wt%) and trace Fe and Mo doping (RuFeMo@TiO 2 ) was prepared as anode for efficient degradation of methylene blue. It shows that Fe and Mo doping reduce the oxidation state of Ru (Ru n+ , n < 4). In addition, the potential electroactive sites of the electrodes are effectively enhanced by Mo doping. While the Fe doping is found to improve the generation of hydroxyl radicals (·OH) and superoxide anion ( O 2 − ), which are the dominant oxidants for the degradation of methylene blue. In result, the RuFeMo@TiO 2 catalyst exhibits high performance towards methylene blue degradation of 97.5 % within 2 hours. It shows that the cooperation of trace transition metals enables efficient degradation of organic dye with ultralow-loaded Ru electrocatalyst, implying a promising application in wastewater treatment.
研究领域:
环境科学
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电化学
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废水处理
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产品关联
DOI
高影响因子
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