调节Pt SAs-Ni2P的电子结构,用于增强进化反应
Yushun Wang1, Xinzheng Zhang2, Yuquan Yang1
1Beijing Advanced Innovation Center for Materials Genome Engineering, School of Mathematics and Physics, University of Science and Technology Beijing 100083, China.
Journal of colloid and interface science
|August 6, 2024
概括
在化基板上的白金单原子催化剂显示出优越的进化性能. 单原子催化剂 (SAC) 的这一进步为电催化提供了一种具有成本效益和高度活性的电催化解决方案.
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:
- 单原子催化剂 (SAC) 最大限度地利用贵金属,降低成本.
- 基质成分显著影响单个原子的电子结构和活性.
- 优化电子结构是提高催化性能的关键.
研究的目的:
- 在过渡金属硫化物 (NiS) 和化物 (NiP) 基质上注射新的单原子催化剂 (Pt SAs) 的设计和制备.
- 评估和比较Pt SAs-NiS和Pt SAs-NiP催化剂的演化反应 (HER) 性能和稳定性.
- 阐明结构-活性关系控制增强的催化性能.
主要方法:
- 在NiS2和Ni2P基质上添加Pt单个原子的合成.
- 演化反应 (HER) 活性和稳定性的电化学表征.
- 密度函数理论 (DFT) 计算用于研究电子结构和结合能.
主要成果:
- 与Pt SAs-Ni2P催化剂相比,Pt SAs-Ni2P催化剂显著提高了HER的性能和稳定性.
- Pt SAs-Ni2P在50mV时实现了0.225A mgPt-1的质量活动电流密度,是商业Pt/C的33倍.
- 理论计算显示,Pt SAs-Ni2P促进了最佳的H结合和H2O脱吸,这是由于Pt d频段中心向下移动.
结论:
- 在Ni2P基板上使用单个原子是开发高性能进化电催化剂的有效策略.
- 电子结构调制和Ni2P的独特形态学有助于优越的催化活性和稳定性.
- 这项工作为设计先进的SAC提供了一条途径,通过为优化电子性能量身定制基板组合.
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