在Ru-Sn氧化物中压力调节的Ru-O共性,使酸性溶液中的水能够有效和稳定地氧化
Yiming Xu1,2, Zhixian Mao2,3, Jifang Zhang2,3
1Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
Angewandte Chemie (International ed. in English)
|January 3, 2024
概括
引入氧化 (RuSnOx) 催化剂的拉伸应变显著提高了水电解剂中氧化演化反应 (OER) 的稳定性和活性. 这种策略可以防止催化剂降解,从而改善长期性能.
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:
- 二氧化卢 (RuO) 是质子交换膜水电解剂的关键阳极催化剂.
- 它的应用受长期稳定性较差的限制,原因是氧网参与氧和氧演化反应 (OER) 期间的溶解.
研究的目的:
- 通过设计Ru-O债券共价性来提高OER基于Ru的催化剂的稳定性和活性.
- 开发一种强大的电催化剂,用于高效的水分离.
主要方法:
- 制造一个二进制Ru-Sn氧化物矩阵 (RuSnOx) 来引入RuO6八面体的拉伸应变.
- 催化剂的结构和电化学性质的表征.
- 在酸性介质中评估OER活性和长期稳定性.
主要成果:
- 在RuSnOx中的拉伸应变削弱了Ru-O键,抑制了晶格氧气参与和Ru溶解.
- 工程催化剂表现出优化的中间吸附能量,提高了OER活动.
- RuSnOx表现出极好的OER活性,在0.1M HClO4中,在10mA cm-2时具有184mV的超电位.
- 催化剂保持了10 mA cm-2的电流密度超过150小时,潜力增加最小.
结论:
- 通过拉力应变调整Ru-O键共价是改善基于Ru的OER电催化剂稳定性的有效策略.
- 在水分应用中,RuSnOx表现出卓越的性能和耐用性.
- 这种方法为开发用于清洁能源技术的先进电催化剂提供了有希望的途径.
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