TY - JOUR
T1 - Exceptionally active and stable RuO2 with interstitial carbon for water oxidation in acid
AU - Wang, Juan
AU - Cheng, Chen
AU - Yuan, Qi
AU - Yang, Hao
AU - Meng, Fanqi
AU - Zhang, Qinghua
AU - Gu, Lin
AU - Cao, Jianlei
AU - Li, Leigang
AU - Haw, Shu Chih
AU - Shao, Qi
AU - Zhang, Liang
AU - Cheng, Tao
AU - Jiao, Feng
AU - Huang, Xiaoqing
N1 - Publisher Copyright:
© 2022 Elsevier Inc.
PY - 2022/6/9
Y1 - 2022/6/9
N2 - 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.
AB - 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.
KW - RuO2
KW - SDG7: Affordable and clean energy
KW - interstitial carbon
KW - oxygen evolution reaction
KW - stability
KW - water splitting
UR - https://www.scopus.com/pages/publications/85132367745
U2 - 10.1016/j.chempr.2022.02.003
DO - 10.1016/j.chempr.2022.02.003
M3 - Article
AN - SCOPUS:85132367745
SN - 2451-9308
VL - 8
SP - 1673
EP - 1687
JO - Chem
JF - Chem
IS - 6
ER -