C-N共掺杂TiO2电极电解水产H2O2的催化机制(英文) |
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作者姓名: | 薛生国 唐璐 唐甜 张锋 吕华港 刘鸿钰 江钧 黄艳红 |
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作者单位: | 1. School of Metallurgy and Environment Central South University;2. Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution Central South University;3. Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology;4. Guangxi Research Institute of Environmental Protection |
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基金项目: | Project(2021JJ30792) supported by the Natural Science Foundation of Hunan Province,China;;Project(52170031) supported by the National Natural Science Foundation of China;;Project supported by the Fundamental Research Funds for the Central Universities,China; |
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摘 要: | 在两电子电解水产H2O2过程中,电极表面存在四电子和一电子水氧化等竞争反应,同时在强氧化环境中电催化剂会发生表面重构,这对其活性位点的解析带来了很大困难。本文基于Ti/TiO2基电极,在空气、氮气或尿素不同环境煅烧后作为H2O2电催化剂,通过电化学测试评估其催化的活性与反应选择性;借助扫描电化学显微镜和XPS氩离子束溅射等手段,分析了电极表面形貌和电流变化,以及在深度上化学组分的演变。结果表明,Ti/TiO2纳米管阵列作为基底,其与尿素共热解得到的羰基和吡咯氮官能团是电解水产H2O2的关键活性位点。研究结果为设计高效的H2O2电催化剂提供了新的借鉴。
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关 键 词: | 过氧化氢 原位表征 二氧化钛电极 羰基 吡咯氮 |
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