定向双电荷送调整了Pt星团的d轨道配置,促进了气演变的动力演变
Zeyi Zhang1,2, Wei Wu1, Suhao Chen1
1College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, China.
Small (Weinheim an der Bergstrasse, Germany)
|December 21, 2023
概括
一个新的战略增强了纳米集群,用于在质子交换膜 (PEM) 水电解中的高效演变反应 (HER) 催化. 这种方法优化了金.
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:
- 在质子交换膜 (PEM) 水电解中,最小化 (Pt) 负载对于具有成本效益的演变反应 (HER) 催化是必不可少的.
- 目前的催化剂在降低Pt量时实现高活性方面面临挑战.
研究的目的:
- 提出并验证一个定向的双电荷取策略,以增强HER的Pt纳米集群的催化活性.
- 优化Pt的电子结构,以提高结和催化效率.
主要方法:
- 理论分析连接体效应和电子金属支相互作用 (EMSI),以了解电子转移动态.
- 实验合成的反配合的氧化锡 (ATO) 支持配合的PtSn异构催化剂 (Fe-PtSn/ATO).
- 在酸性介质中的催化剂性能的电化学表征,用于HER.
主要成果:
- 定向的双电荷送策略有效调整了Pt纳米集群的d轨道电子分布.
- 合成的3%Fe-PtSn/ATO催化剂表现出明显较低的超电位 (10.5 mV在10 mA cm−2) 和更高的质量活性 (28.6x商业Pt/C).
- 催化剂在HER的酸性介质中表现出极好的稳定性.
结论:
- 拟议的战略为开发高效的HER催化剂提供了一个有希望的途径,具有最小的Pt负载.
- 优化的电子结构和金属支相互作用是提高HER性能的关键.
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