在性介质中通过-原子对进行增强进化反应 改性纳米粒子
Parisa Eskandari1, Shujie Zhou1, Jodie Yuwono2
1School of Chemical Engineering, University of New South Wales (UNSW) Sydney, Kensington, NSW, 2052, Australia.
这项研究开发了一种新的电催化剂,将纳米粒子,单个原子和原子对结合在添加碳上,以实现高效的性进化. 新的催化剂的性能明显优于商业/碳,显示出增强的水吸附和解离动力学.
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:
- 优化电子金属支相互作用 (EMSI) 是进化反应 (HER) 中电催化剂性能的关键.
- 调节活动部位的电子结构加速了性HER中的水吸附和解离动力学.
研究的目的:
- 设计基于的电催化剂,改造电子结构,以提高性HER性能.
- 研究单个原子,原子对和纳米颗粒在化碳支器上的作用.
主要方法:
- 将单个鲁原子 (RuSAs) 和Ru-Cr原子对 (RuCrAPs) 嵌入到添加碳 (N-C) 支持器上.
- 优化电子金属支相互作用 (EMSI) 的Ru纳米粒子 (RuNP).
- 对性HER的RuNPs-RuCrAPs-N-C催化剂的电化学表征.
主要成果:
- RuNPs-RuCrAPs-N-C催化剂的周转频率 (TOF) 比商业Pt/C高出六倍.
- 对于性HER.在10 mA·cm−2时,达到较低的超电位 (31 mV vs. 34 mV).
- 确定RuCrAPs作为主要活性位点,促进水吸附/解离,调节脱吸.
结论:
- 结合纳米粒子,单个原子和原子对与优化的EMSI的协同作用策略增强了性HER.
- 开发的基于Ru的催化剂为高效生产的贵金属催化剂提供了一个有希望的替代品.
- 活性站点的合理设计及其与支持的相互作用对于先进的电催化剂开发至关重要.
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