和硫兴奋剂用于创建活性位点和调节Ni-Mo-S电催化剂的d频段中心,用于进化反应
Wei Xu1, Yu-Wei Feng1, Shi-Jie Li1
1National Research Base of Intelligent Manufacturing Service, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China.
Inorganic chemistry
|January 23, 2025
概括
这项研究表明,将和硫添加到催化剂中,如何显著提高演化反应 (HER) 的性能. 这些增强的--硫催化剂提供了高效和成本效益的生产.
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:
- 优化活性位点对于提高电催化剂中的演化反应 (HER) 性能至关重要.
- 与金属和非金属合的基催化剂对具有成本效益的HER应用有希望.
研究的目的:
- 为了研究合并的 (Mo) 和硫 (S) 在增强 (Ni) 电催化剂的HER活性中的作用.
- 阐明Ni-Mo-S电催化剂提高HER性能背后的机制.
主要方法:
- 合成和硫联合 (NMS) 电催化剂.
- 电化学表征来评估HER的性能 (超电位,Tafel斜率).
- 理论计算 (例如,DFT) 以了解Mo和S原子的作用及其电子相互作用.
主要成果:
- NMS电催化剂表现出了优异的HER性能,其低超电位为77.0mV (10mA·cm-2),Tafel斜率为64.4mV·dec-1.
- 增强的活性归因于电化学活性较大的表面积,快速反应动力学和改进的电荷转移能力.
- 理论计算证实Mo原子是活性位点,S原子通过调节d频段中心和优化Mo-中间相互作用来进一步促进Mo活性.
结论:
- 和硫的合并有效地增强了基于的电催化剂的HER活性.
- 通过电子结构调制介导的Mo和S原子之间的协同作用是高催化性能的关键.
- 这项工作为设计先进的基于Ni的电催化剂,以高效生产气提供了机械的理解.
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