[Chem] 我室黄小青教授发表论文:Exceptionally active and stable RuO2 with interstitial carbon for water oxidation in acid

发布日期:2022年03月10日   浏览次数:

我室黄小青教授在 Chem 上发表论文:Exceptionally active and stable RuO2 with interstitial carbon for water oxidation in acid

摘要:Oxygen evolution reaction (OER) plays a critical role in energy conversion technologies. Significant progress has been made in alkaline conditions. In contrast, it remains a challenge to develop stable OER electrocatalysts in acidic conditions. Herein, we report a new strategy to stabilize RuO2 by introducing interstitial carbon (C-RuO2-RuSe), where the optimized C-RuO2-RuSe-5 exhibits a low overpotential of 212, 259, and 294 mV to reach a current density of 10, 50, and 100 mA cm−2, respectively. More importantly, C-RuO2-RuSe-10 has long-term stability of up to 50 h, representing one of the most stable OER electrocatalysts. X-ray absorption spectroscopy reveals that the Ru–O bonds have been elongated due to the formation of interstitial C. Theoretical calculations show that the elongated Ru–O bonds in RuO2 enhance its stability and reduce energy barriers for OER. This work provides a new perspective for designing and constructing efficient Ru-based electrocatalysts for water splitting.

文章链接:https://www.sciencedirect.com/science/article/pii/S2451929422000882