Pt/α-MoC催化剂在高电流密度下提高pH-通用进化反应
Wei Liu1, Anyang Wang2, Jihan Zhang1
1Beijing National Laboratory for Molecular Sciences, New Cornerstone Science Laboratory, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
亚纳米对化碳 (Pt/α-MoC) 电催化剂通过水电解有效地产生绿色. 这种催化剂在所有pH级别实现了高性能,显示了工业生产的潜力.
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:
- 高效的演化反应 (HER) 电催化剂对于工业水电解和绿色生产至关重要.
- 在高电流密度下有效运行的pH通用催化剂的开发仍然是一个重大挑战.
研究的目的:
- 为pH-通用演化反应 (HER) 构建和评估一个亚纳米 Pt/α-MoC 电催化剂.
- 研究Pt和α-MoC之间的协同机制,以提高在高电流密度下的HER性能.
主要方法:
- 合成亚纳米的Pt/α-MoC电催化剂.
- 在所有pH电解质中HER性能的电化学表征.
- 几乎在现场的X射线光电子光谱 (XPS) 和密度函数理论 (DFT) 计算.
主要成果:
- Pt/α-MoC表现出极好的HER性能,在125mV的低超电位下达到1000mA cm-2的电流密度.
- 催化剂通过α-MoC表现出高效的水解离和在Pt位点上有利的质子脱吸动力学.
- 使用Pt/α-MoC的质子交换膜水电解装置显示了低电池电压 (1.65V在1A cm-2) 和超过300小时的稳定性.
结论:
- α-MoC和原子分散的 Pt之间的协同作用使得高效的 HER 成为可能,特别是在高电流密度下.
- Pt/α-MoC是一种有前途的,可扩展的电催化剂,用于工业绿色生产.
- 这项研究为设计用于高性能水电解的先进电催化剂提供了宝贵的见解.
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