激光照射诱导的Ru集群基催化剂具有性气进化的双溢出途径
Deyu Kong1, Chao Meng1,2, Yi Wan1
1State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, P.R. China.
我们在氧化 (Co(OH) x上开发了激光处理的 (Ru) 集群,以实现高效的性进化反应 (HER). 这种设计通过促进中间溢出来增强气生产,大大提高了性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 基于 (Ru) 集群的电催化剂对性气演化反应 (HER) 显示出希望.
- 在Ru集群上强烈吸附 (H*) 和 (OH*) 中间体,阻碍了水分离和气体演化.
- 开发有效的策略来管理中间吸附对于提高 HER 性能至关重要.
研究的目的:
- 为了合理地设计支持Co(OH) x的Ru集群 (L-Ru/Co(OH) x,为H*和OH*中间体提供双重溢出途径.
- 调查激光照射在创造氧气空缺和超细Ru集群中的作用.
- 为了优化催化剂,增强的进化活动和稳定性.
主要方法:
- 激光照射Co(OH) x支持的Ru集群以诱导局部热效应.
- 使用先进技术,对氧气空缺和Ru集群形成进行表征.
- 在性介质中进行电化学测试,以评估演变反应 (HER) 的性能.
- 一个离子交换膜电解仪的制造和测试.
主要成果:
- 激光照射在Co(OH) x上产生均分散的氧空缺 (OVs),并形成在OVs上固定的超细Ru集群.
- 在Ru集群,OV和Co站点之间发生了协同的电子再分配,形成了富含电子的Ru/Co和缺电子的OV站点.
- 最佳的L-Ru/Co(OH) x催化剂表现出13mV的低超电位和42mV dec-1的Tafel斜率,优于现有的催化剂.
- 离子交换膜电解器在2.0V时实现了工业级电流密度1.68 A cm−2,明显超过了基准.
结论:
- L-Ru/Co(OH) x催化剂有效地通过双路径促进H*和OH*溢出,促进高效的进化.
- 激光诱导的修饰为设计HER的高性能电催化剂提供了一种新的方法.
- 开发的催化剂显示出在水电解中的工业应用的巨大潜力.
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