热力学控制的原子配对:通过序列电沉积精确合成双原子电催化剂的潜在窗口策略
Jingsong Xu1, Hang Zhong1, Yuhan Wu2
1Science and Technology on Surface Physics and Chemistry Laboratory, Jiangyou, Sichuan 621908, China.
Journal of the American Chemical Society
|January 13, 2026
概括
研究人员开发了一种可扩展的电化学方法,用于精确的双原子催化剂合成. 这种技术通过优化催化活性,使演化反应 (HER) 的高性能成为可能.
科学领域:
- 催化剂
- 材料科学
- 电化学
背景情况:
- 双原子催化剂 (DAC) 提供高原子利用率和协同效应,但面临合成挑战.
- 原子精确的合成对于释放DAC的全部潜力至关重要.
研究的目的:
- 开发一个可扩展和原子精确的电化学策略来制造基于贵金属的DAC.
- 研究这种方法在演化反应 (HER) 催化中的应用.
主要方法:
- 使用潜在窗口控制的低电位沉积 (UPD) 和替代的电化学合成.
- 使用初级金属位点作为二级金属原子组装的点.
- 使用热力学尺寸选通过沉积潜力控制以排除杂质.
主要成果:
- 在硫添加石墨泡上成功制造了非对称配置的Pt2双原子催化剂 (Pt2/SGF).
- 在 10 mA cm-2 时达到 24. 2 mV 的超电位的杰出 HER 性能.
- 机理学研究显示,由于Pt二聚体中的协同电子转移,优化了中间吸附 (ΔG_H* = -0.06 eV).
结论:
- 开发的电化学策略是多用途的,适用于各种金属和支物.
- Pt2/SGF催化剂表现出优异的HER活性,突出了精确设计的DAC的潜力.
- 通过优化反应中间体,DAC中的协同效应显著提高了催化性能.
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