Quadruple perovskite ruthenate as a highly efficient catalyst for acidic water oxidation
Quadruple perovskite ruthenate as a highly efficient catalyst for acidic water oxidation
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四重钙钛矿钌酸盐作为酸性水氧化的高效催化剂
DOI：
10.1038/s41467-019-11789-3
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发表时间：
2019-08-23
影响因子：
16.6
通讯作者：
Zhou, Shiming
中科院分区：
文献类型：
--
作者：
Miao, Xianbing;Zhang, Lifu;Zhou, Shiming
开发酸性介质中高活性、高耐久性的析氧催化剂是质子交换膜水电解制氢设计的主要挑战。在这里，我们报告了一个四重钙钛矿氧化物CaCu 3 Ru 4 O 12作为一个上级催化剂的酸性水氧化。这种复合氧化物在10 mA cm−2geo时表现出171 mV的超小过电位，远低于最先进的RuO 2。与RuO 2相比，CaCu 3Ru 4 O 12的质量活度提高了两个数量级以上，且稳定性更好.密度泛函理论计算表明，四元钙钛矿催化剂具有较低的Ru 4d-带中心相对于RuO 2，这有效地优化了氧中间体的结合能，从而提高了催化活性.
Development of highly active and durable oxygen-evolving catalysts in acid media is a major challenge to design proton exchange membrane water electrolysis for producing hydrogen. Here, we report a quadruple perovskite oxide CaCu3Ru4O12as a superior catalyst for acidic water oxidation. This complex oxide exhibits an ultrasmall overpotential of 171 mV at 10 mA cm−2geo, which is much lower than that of the state-of-the-art RuO2. Moreover, compared to RuO2, CaCu3Ru4O12shows a significant increase in mass activity by more than two orders of magnitude and much better stability. Density functional theory calculations reveal that the quadruple perovskite catalyst has a lower Ru 4d-band center relative to RuO2, which effectively optimizes the binding energy of oxygen intermediates and thereby enhances the catalytic activity.