由化RuO引发的加速解质使酸性水的电解有效且稳定
Jian Zheng1, Zheng-Jie Chen2, Wei Lu1
1Institute of Technology for Carbon Neutrality, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
Journal of the American Chemical Society
|December 18, 2025
概括
离子增强水电解剂中的酸氧演化反应的氧化催化剂. 这一突破提高了催化活性和长期稳定性,为成本高效的生产铺平了道路.
科学领域:
- 电化学
- 材料科学
- 催化剂
背景情况:
- 基于的催化剂对于具有成本效益的质子交换膜水电解器 (PEMWE) 是至关重要的.
- 氧化演化反应 (OER) 中的苛刻酸性条件导致 (Ru) 的过氧化,降低了催化活性和稳定性.
研究的目的:
- 研究RuO2中的离子 (F−) 介导机制,以增强OER活性和稳定性.
- 为酸性OER应用开发一个高性能催化剂.
主要方法:
- 合成含有离子的改性氧化催化剂 (RuO1.86F0.14).
- 在酸性OER中催化剂性能的电化学表征.
- 在OER条件下和PEMWE中测试催化剂的长期稳定性.
主要成果:
- 优化的RuO1.86F0.14催化剂在10 mA cm-2时表现出超低的153 mV.
- 催化剂表现出极好的稳定性,持续运行超过980小时,降解率低至27μVh-1.
- 在PEMWE中,RuO1.86F0.14只需要1.63V,在1A cm-2下稳定运行超过100小时.
结论:
- 由离子触发的键介导机制增强了酸性OER动力学和催化剂稳定性.
- 合物通过减少 Ru-O 键的共价性来稳定 RuO2.
- 阴离子调节为设计高性能酸性OER催化剂提供了一个有前途的策略.
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