电催化剂
气凝胶
过电位
无定形固体
碳纤维
氧化钴
无定形碳
化学工程
氧化物
催化作用
材料科学
电解水
纳米技术
化学
电解
冶金
复合材料
工程类
有机化学
电极
电化学
复合数
物理化学
电解质
作者
Guorong Ma,Shanshan Gao,Guofeng Tang,Fushan Chen,Xukang Lang,Xianglin Qiu,Xiaoming Song
标识
DOI:10.1016/j.carbpol.2023.120942
摘要
Hydrogen energy is turning into a major research topic in this complex and changing world. In recent years, more and more research has been done on transition metal oxides and biomass composites. In this study, potato starch and amorphous cobalt oxide were assembled into carbon aerogel by sol-gel method and high-temperature annealing (CoOx/PSCA). The connected porous structure of the carbon aerogel is conducive to HER mass transfer, and its structure can avoid the agglomeration of transition metals. It also has great mechanical properties and can be directly used as a self-supporting catalyst for electrolysis with 1 M KOH for hydrogen evolution, which showed excellent HER activity and yielded the effective current density of 10 mA cm-2 at 100 mV overpotential. Electrocatalytic experiments further showed that the better performance of CoOx/PSCA for HER can be attributed to the high electrical conductivity of carbon and the synergistic effect of unsaturated catalytic sites on the amorphous CoOx cluster. The catalyst comes from a wide range of sources, is easy to produce, and has good long-term stability, so it can be used in large-scale production. This paper provides a simple and easy method to make biomass-based transition metal oxide composites for electrolyzing water to produce hydrogen.
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