电催化剂
贵金属
氢
兴奋剂
联轴节(管道)
甘油
金属
材料科学
化学
无机化学
化学工程
物理化学
电化学
冶金
光电子学
电极
有机化学
工程类
作者
Yanxia Wu,Xiaoling Zhou,Hanbin Jin,Lulu Guo,Qingtao Wang
标识
DOI:10.1021/acs.energyfuels.4c05699
摘要
Hydrogen energy represents a novel energy source characterized by its diverse range of origins, high energy density, and absence of carbon emissions. Coupled hydrogen evolution (CHE) is to achieve efficient, energy-saving, and economical generation of hydrogen by constructing systems that promote synergistic interactions between multiple reaction steps in order to reduce energy consumption and optimize resource utilization. This study reports the design and preparation of a vanadium(V)-doped Ni3S2 (V-Ni3S2@NF) electrocatalyst on a nickel foam substrate. The electrocatalytic material exhibits excellent electrochemical performance when catalyzing the glycerol oxidation reaction (GOR) and hydrogen evolution reaction (HER). Specifically, the electrode only needs to apply a voltage equivalent to the reversible hydrogen electrode potential (RHE) of 1.41 and 0.56 V when driving the current intensity of GOR and HER to 100 mA cm–2. In addition, the 0.15 V-Ni3S2@NF electrode material exhibits excellent stability characteristics under continuous operation conditions for 10 h. In conclusion, 0.15 V-Ni3S2@NF was employed as a bifunctional electrode material, and a comprehensive analysis of its performance in the context of GOR synergistically enhancing HER was conducted. For the conversion of glycerol to formate, the Faradaic efficiency (FE) consistently remains at a high level of over 85%. Similarly, in the hydrogen evolution reaction system, the FE of hydrogen production at the electrode consistently remains approximately 99%. The findings suggest that the 0.15 V-Ni3S2@NF electrode exhibits significant efficiency of energy conversion and selectivity during the processes of GOR and HER, and few side reactions occur to consume electrical energy.
科研通智能强力驱动
Strongly Powered by AbleSci AI