高效电催化CO2降解反应的含氧组的性质
Fa Yang1,2, Xianyin Ma3, Wen-Bin Cai3
1State Key Laboratory of Electroanalytical Chemistry, and Jilin Province Key Laboratory of Low Carbon Chemical Power , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , 5625 Renmin Street , Changchun 130022 , P.R. China.
Journal of the American Chemical Society
|December 3, 2019
概括
没有金属的石墨烯纳米盘催化了二氧化碳的减少. 卡基与其他氧基之间的协同作用,而不是单一基,驱动活性. 催化性能是循环再生的长期耐用性.
科学领域:
- 材料科学
- 电化学
- 催化剂
背景情况:
- 碳材料上的含氧组增强了催化活性.
- 电催化减碳 (CO2RR) 对于可持续能源至关重要.
- 没有金属的催化剂提供了无害环境的替代品.
研究的目的:
- 研究石墨烯纳米盘 (GND) 上含氧组对CO2RR的作用.
- 确定表面组含量和催化性能之间的关系.
- 制定提高催化剂耐用性的策略.
主要方法:
- 无金属单层石墨烯纳米盘 (GND) 的合成,含有不同氧基.
- 电催化测试 CO2RR 的形成.
- 密度函数理论 (DFT) 的计算以阐明反应机制.
- 用于催化剂再生的电氧化.
主要成果:
- CO2RR性能与表面基含量具有正相关性.
- 高催化活性源于基和相邻基 (基,环氧,碳基) 之间的协同作用.
- 通过电氧化对基的循环再生恢复了催化活性,确保了长期的耐用性.
结论:
- 表面功能组的协同作用是无金属GND中高CO2RR活性的关键.
- 一个涉及电氧化的"工作和休息"战略使催化剂再生和长期稳定性成为可能.
- 这项研究提供了氧气组在催化中的作用以及设计高性能碳催化剂的新方法.
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