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通过Cl和Ru对Pt单个原子的协同稳定,用于工业规模的电流密度气生产
Qiansen Wang1,2,3, Wenhui Ling2, Yang Lu2
1Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, P.R. China.
单原子催化剂为水电解提供了高效率,但缺乏耐用性. 这项研究引入了一种由Ru纳米粒子稳定的新型Pt-Cl-Pt结构,增强进化反应的活性和寿命.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 单原子 (SA) 催化剂,特别是 (Pt),由于高原子利用率,对PEM水电解 (PEMWE) 是有前途的.
- 对于实用的PEMWE应用,Pt SA催化剂的耐用性仍然是一个重大挑战.
研究的目的:
- 开发用于PEMWE的演化反应 (HER) 的高活性和耐用的Pt SA催化剂.
- 通过协同效应来研究Pt SAs的稳定机制.
主要方法:
- 通过Cl-ligand和Ru纳米粒子协同稳定Pt单个原子的合成.
- 在PEMWE中进行演化反应 (HER) 的电催化试验.
- 使用密度函数理论 (DFT) 进行理论分析,以了解电子结构和稳定机制.
主要成果:
- 开发的Pt SA催化剂对HER具有很高的活性和耐用性.
- 确定了一个动态演变的 Pt-Cl-Pt 协调结构,有效地防止了 Pt SA 聚合.
- 理论计算证实,Ru 和 Cl 的协同作用精细调整了 Pt SAs 的电子结构,提高了稳定性.
结论:
- 新的Pt-Cl-Pt协调结构为稳定Pt单个原子提供了一个可行的策略,克服了PEMWE中的耐用性问题.
- 这种催化剂在1.0 A cm−2时达到1.66 V的低电池电压,具有超低的Pt负载,并保持1000小时以上的稳定性.
- 这些发现强调了稳定SA催化剂在下一代能源技术中的重大应用潜力.
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