A Co-Doped Nanorod-like RuO2 Electrocatalyst with Abundant Oxygen Vacancies for Acidic Water Oxidation
A Co-Doped Nanorod-like RuO2 Electrocatalyst with Abundant Oxygen Vacancies for Acidic Water Oxidation
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具有丰富氧空位的共掺杂纳米棒状 RuO2 电催化剂用于酸性水氧化
DOI：
10.1016/j.isci.2019.100756
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发表时间：
2019-12
期刊：
影响因子：
5.8
通讯作者：
Chen Liang
中科院分区：
文献类型：
--
作者：
Tian Yuanyuan;Wang Shuo;Velasco Ever;Yang Yueping;Cao Lujie;Zhang Linjuan;Li Xing;Lin Yichao;Zhang Qiuju;Chen Liang
目前，作为化石燃料燃烧的清洁替代品，在酸性介质中用于析氧反应（OER）的活性和高度稳定的电催化剂具有很高的需求。在此，我们报告了一种Co掺杂的纳米棒状RuO 2电催化剂，通过Ru交换的ZIF-67衍生物的简单的一步退火实现了丰富的氧空位。该化合物在酸性介质中表现出超高的OER性能，在10 mA cm− 2下具有169 mV的低过电位，同时保持优异的活性，即使在10 mA cm−2的恒定电流下暴露于50小时恒电流稳定性测试时也是如此。实验表征和密度泛函理论（DFT）计算结果表明，Co掺杂RuO 2的OER性能显著提高主要是由于其丰富的氧空位和调制的电子结构，这依赖于空位相关的晶格氧氧化机制（LOM）而不是吸附物演化反应机制（AEM）.
Active and highly stable electrocatalysts for oxygen evolution reaction (OER) in acidic media are currently in high demand as a cleaner alternative to the combustion of fossil fuels. Herein, we report a Co-doped nanorod-like RuO2electrocatalyst with an abundance of oxygen vacancies achieved through the facile, one-step annealing of a Ru-exchanged ZIF-67 derivative. The compound exhibits ultra-high OER performance in acidic media, with a low overpotential of 169 mV at 10 mA cm−2while maintaining excellent activity, even when exposed to a 50-h galvanostatic stability test at a constant current of 10 mA cm−2. The dramatic enhancement in OER performance is mainly attributed to the abundance of oxygen vacancies and modulated electronic structure of the Co-doped RuO2that rely on a vacancy-related lattice oxygen oxidation mechanism (LOM) rather than adsorbate evolution reaction mechanism (AEM), as revealed and supported by experimental characterizations as well as density functional theory (DFT) calculations.
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