用碳涂层的氧化作为进化反应的高性能电催化剂
Ning Xu1, Guoxuan Cao1, Liyong Gan1
1School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, PR China.
概括
为演化反应 (HER) 开发高效,低成本的催化剂是水分裂的关键. 这项研究通过控制碳涂层的表面氧化物,优化了-氧化物纳米催化剂,实现了卓越的HER性能和耐用性.
科学领域:
- 电化学和材料科学 材料科学
- 用于能源转换的催化剂
背景情况:
- 高性能,具有成本效益的催化剂对于电化学水分裂至关重要.
- 在非贵金属催化剂 (Co,Ni) 上的表面氧化物增强了基媒介中的进化反应 (HER) 性能.
- 对这些氧化物在催化机制中的作用的系统研究是有限的.
研究的目的:
- 研究Co-Mo-O纳米催化剂表面氧化物形成与电催化性能之间的相关性.
- 通过控制氧化物含量来优化HER活性和耐用性.
- 通过第一原则计算,阐明氧化物在催化机制中的作用.
主要方法:
- 合成和 Co-Mo-O 纳米催化剂的表征.
- 通过碳外涂层对中度氧化物形成的表面修饰.
- 在性环境下对演化反应 (HER) 的电催化性能测试.
- 第一个原则计算来研究活性位点和氧化物影响.
主要成果:
- 在表面氧化物量和Co-Mo-O纳米催化剂的HER电催化性能之间建立了直接的相关性.
- 碳涂层有效地缓和了表面氧化物形成,优化了催化性能.
- 开发的碳涂层Co-Mo-O纳米催化剂 (Co-Mo-O@C/NF) 在性介质中表现出极好的HER活性和耐用性.
结论:
- 控制表面氧化物形成是增强非贵金属HER催化剂的可行策略.
- 碳涂层Co-Mo-O纳米催化剂是一种高效且耐用的非贵金属催化剂,用于演变反应.
- 第一原则计算提供了对活性位点和氧化物在催化过程中的有益作用的见解.
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