兴奋剂
壳体(结构)
甲醇
材料科学
化学工程
蛋黄
化学
无机化学
复合材料
光电子学
有机化学
工程类
食品科学
作者
Shuang Zhao,Haoran Wang,Xiangwei Liu,Xiaoyan Cao,Hui Yang,Xiangming Kong,Qijing Bu,Qingyun Liu
标识
DOI:10.1016/j.colsurfa.2022.129787
摘要
Developing clean and renewable energy to replace fossil fuels becomes an urgent task. Especially, direct methanol fuel cells (DMFC) are considered as the potential candidate. The large-scale application of Pt-based electrocatalysts as the most active electrocatalysts towards methanol oxidation is limited by the cost and scarcity. Therefore, exploring low-cost electrocatalysts with higher catalytic activity has been focused on by scientists from different countries. In this work, we have prepared the N doped Co 3 O 4 hollow microspheres as highly efficient electrocatalysts towards methanol oxidation in basic solution. The electrocatalytic activity of N-Co 3 O 4 toward methanol oxidation in the mixture of KOH (1 M) and CH 3 OH (1 M) is evaluated by cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. In comparison with that of the existing non-metallic doped metal oxide modified electrodes, the prepared N-Co 3 O 4 demonstrates higher electrocatalytic activity together with higher stability toward methanol oxidation. The current density of N-Co 3 O 4 is 23.87 mA cm −2 toward methanol oxidation, which is 3.2 times higher than that of Co 3 O 4 (7.47 mA cm −2 ). The current retention rate of N-Co 3 O 4 and Co 3 O 4 is 65.7% and 58.3% after 500 cycles, respectively. Methanol oxidation was catalyzed by doping Co 3 O 4 with nitrogen.
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