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麦芽糖衍生氧自掺杂电催化剂电合成H2O2性能

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两电子氧还原反应原位电合成H2O2是一种有前景的储能及H2O2制备方法。通过一步碳化法获得麦芽糖衍生的氧自掺杂电催化剂用于电合成H2O2，碳化温度会改变催化剂表面官能团种类与缺陷程度从而影响其H2O2选择性。结果表明，在800 ℃碳化的催化剂具有最优的选择性，利用含氧官能团和缺陷作为反应位点，以微孔为主的孔隙结构能促进反应位点均匀分布和物质传递。负载催化剂的空气自呼吸阴极在100mA·cm-2的外加电流密度下，H2O2产率为39。88 mg·h-1·cm-2，接近工业化可持续生产H2O2的要求。
Performance of Electrosynthesis of H2O2 by Maltose-derived Oxygen Self-doped Electrocatalysts
In situ electrosynthesis of H2O2 by two-electron oxygen reduction reaction is a promising method for energy storage and H2O2 production.Maltose-derived oxygen self-doping electrocatalysts were obtained by one-step carbonation method for the electrosynthesis of H2O2.The carbonization temperature would change the types of surface functional groups and the degree of defects of the catalyst,thus affecting the H2O2 selectivity.The results show that the catalyst carbonized at 800℃ has the optimal selectivity,using oxygenic functional groups and defects as reaction sites,and the pore structure dominated by micropores can promote uniform distribution of reaction sites and mass transfer.Under the applied current density of 100 mA·cm-2,the H2O2 yield of the air-breathing cathode loaded with the catalyst achieves 39.88 mg·h-1·cm-2,which is close to the requirement of industrial sustainable production of H2O2.

oxygen reduction reactionhydrogen peroxideoxygen self-dopingmaltose-derived electrocatalystair-breathing cathode

陈金鸿、叶丁丁、朱恂、杨扬、汪少龙、陈蓉、廖强

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重庆大学低品位能源利用技术及系统教育部重点实验室,重庆 400030

重庆大学能源与动力工程学院工程热物理研究所,重庆 400030

氧还原反应 过氧化氢 氧自掺杂 麦芽糖衍生电催化剂 空气自呼吸阴极

国家自然科学基金创新研究群体项目重庆市自然科学基金面上项目重庆英才计划重庆英才计划中央高校基本科研业务经费项目

52021004cstc2020jcyjmsxmX0827CQYC201905012cstc2021ycjhbgzxm00342020CDJ-LHZZ-046

2024

工程热物理学报
中国工程热物理学会 中国科学院工程热物理研究所

工程热物理学报

CSTPCD北大核心
影响因子：0.4
ISSN：0253-231X
年,卷(期)：2024.45(9)