Ru0.1Mn0.9Ox 电催化剂用于在酸性海水中的持久氧气演变
Jun Xu1, Chun-Chuan Kao1, Haifeng Shen1
1School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia.
Angewandte Chemie (International ed. in English)
|November 24, 2024
概括
一个新的非珍贵的氧化阳极能够在酸性海水电解中实现高度选择性和稳定的氧气演变,克服绿色生产的离子沉挑战.
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
- 绿色化学 绿色化学
背景情况:
- 在中性/性系统中,直接的海水电解为绿色被离子沉所阻碍.
- 酸性系统提供了一个解决方案,但由于竞争的演化反应 (CER),需要高度选择性和稳定的阳极.
- 基于/的催化剂虽然活跃,但也促进了CER,需要替代的阳极材料.
研究的目的:
- 开发一种非贵金属阳极,用于直接酸性海水电解.
- 为了实现高氧化演化反应 (OER) 选择性和长期稳定性.
- 了解化物离子存在的选择性OER的催化机制.
主要方法:
- 一种非珍贵的Ru0.1Mn0.9Ox阳极材料的合成和表征.
- 在酸性海水中对阳极进行电化学测试,以检测OER和CER.
- 在现场进行机制研究,以阐明离子和活性位点的作用.
主要成果:
- Ru0.1Mn0.9Ox阳极表现出高的OER选择性和超过1200小时的显著稳定性.
- 离子占据了Ru位点,将OER活性中心转移到Mn并防止Ru溶解.
- 由Ru激活的Mn位点促进了OH吸附,创造了一个受OER有利的环境,抑制了CER.
结论:
- 开发了一种利用化物辅助活性位点转移到对CER不敏感的Mn的策略.
- 这种方法可以在酸性海水电解中实现高度选择性和持久的氧气进化.
- Ru0.1Mn0.9Ox阳极代表了从海水中生产绿色的有希望的进步.
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