Bimetallic Doped RuO2 with Manganese and Iron as Electrocatalysts for Favorable Oxygen Evolution Reaction Performance

• Published in: ACS omega Vol. 5; no. 13; pp. 7342 - 7347
• Main Authors: Wu, Yiyi, Tariq, Muhammad, Zaman, Waqas Qamar, Sun, Wei, Zhou, Zhenhua, Yang, Ji
• Format: Journal Article
• Language: English
• Published: American Chemical Society 07.04.2020
• ISSN: 2470-1343; 2470-1343
• DOI: 10.1021/acsomega.9b04237

Synthesizing oxygen evolution reaction (OER) catalysts with enhanced activity by codoping has been proven to be a feasible approach for the efficient use of noble metals via renewing their basic intrinsic properties. In continuation of the research in codoping, we prepare a ruthenium-based bimetallic doped catalyst Mn x Fe y Ru1–x–y O2 with an outstanding OER activity as compared to pure RuO2, one of the state-of-the-art OER catalysts. The synthesized codoped RuO2 with a Mn/Fe molar ratio of 1 reflected a Tafel slope of only 41 mV dec–1, which is appreciably lower than 64 mV dec–1 for pure RuO2. The X-ray photoelectron spectroscopy (XPS) performed reveals that oxygen vacancy and manganese valency are the key factors of the OER activity for codoped catalysts.