过渡金属碳化物MXenes与Pt亚纳米集群定,以在所有pH范围内实现高性能进化反应
Zhihao Lei1, Sajjad Ali2, C I Sathish1
1Global Innovative Center of Advanced Nanomaterials, College of Engineering, Science and Environment, University of Newcastle, Callaghan, NSW, 2308, Australia.
Nano-micro letters
|January 31, 2025
概括
过渡金属碳化物MXenes与团显示了增强的演化反应 (HER) 性能. 这种富含的MXene催化剂在酸性和性条件下表现优于商业选择.
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:
- 对于电化学反应,MXenes,特别是Ti3C2Tx,正在被探索.
- 过渡金属碳化物MXenes含有高含量的过渡金属碳化物MXenes在催化过程中未得到充分研究.
- 基于的电催化剂对于进化反应 (HER) 是至关重要的.
研究的目的:
- 为了研究富含的过渡金属碳化物MXenes与HER的白金 (Pt) 电催化剂相结合.
- 为了比较Pt集群/MXene催化剂与单原子Pt/MXene和商业Pt/C催化剂的HER性能.
- 了解有助于增强催化活性的潜在机制.
主要方法:
- 制造Pt集群和单个原子纳入富含的MXene结构.
- 在酸性和性电解质中对HER的催化剂的电化学表征.
- 密度函数理论 (DFT) 计算分析电子结构和反应机制.
主要成果:
- Pt集群/MXene催化剂表现出比单原子 Pt/MXene 和商业 Pt/C. 的 HER 性能优越.
- 优化的催化剂实现了低超电位 (28mV在10 mA cm-2),29 mV dec-1的Tafel斜率,以及高质量活性 (1203 mA mgPt-1).
- DFT计算显示了增强的活性点,表面功能组,电荷转移和Pt-MXene电子相互作用.
结论:
- 富含的MXenes与Pt集群集成,是HER的高效电催化剂.
- 增强的性能归因于Pt和富含的MXene基质之间的协同作用.
- 这项研究强调了富含的MXenes作为各种催化应用的有前途平台的潜力.
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