不对称的双原子催化剂与轴性化物协调,以实现高效的氧降解反应
Yan Zhang1,2, Fuhua Li1, Shuwei Li3
1School of Chemistry, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|May 29, 2025
概括
这项研究引入了新的低组金属 (低PGM) 催化剂,用于质子交换膜燃料电池 (PEMFCs). 这些催化剂显著提高了氧降解反应 (ORR) 的性能和稳定性,提供了具有成本效益的解决方案.
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:
- 质子交换膜燃料电池 (PEMFC) 需要具有成本效益的催化剂,以减少对贵金属的依赖.
- 低组金属 (低PGM) 催化剂对于降低PEMFC成本至关重要.
- 双原子催化剂显示出增强的催化活性和稳定性的承诺.
研究的目的:
- 为了研究轴性Cl-协调的Pt-Co双原子在N-化石墨碳 (Pt1Co1/NC-Cl) 上作为低PGM催化剂的有效性.
- 评估异原子调制的不对称结构对催化性能的影响.
- 评估开发的氧减少反应 (ORR) 催化剂的稳定性和耐用性.
主要方法:
- 合成 Pt1Co1/NC-Cl 双原子催化剂.
- 在酸性介质中氧降解反应 (ORR) 的电化学表征.
- 通过循环电压测量进行5000个循环的耐用性测试.
- 对轴向协调在催化剂稳定性中的作用的分析.
主要成果:
- 该Pt1Co1 / NC-Cl催化剂在0.1M HClO4.1中实现了0.841V的高半波电位 (E1/2) 在0.1M HClO4.
- 证明了出色的稳定性,在5000次循环后,E1/2只减少了12mV.
- 轴性原子在电还原过程中被证明是抗去除的,从而提高了催化剂的耐用性.
结论:
- 异原子调节的不对称结构显著提高了基于Pt的催化剂的性能.
- 轴性Cl协调提高了双原子催化剂的稳定性.
- 结合非金属协同元素为PEMFC中高性能低PGM催化剂提供了一个可行的策略.
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