10.1021/acsomega.9b04237.s001 Yiyi Wu Yiyi Wu Muhammad Tariq Muhammad Tariq Waqas Qamar Zaman Waqas Qamar Zaman Wei Sun Wei Sun Zhenhua Zhou Zhenhua Zhou Ji Yang Ji Yang Bimetallic Doped RuO<sub>2</sub> with Manganese and Iron as Electrocatalysts for Favorable Oxygen Evolution Reaction Performance American Chemical Society 2020 OER activity codoping Favorable Oxygen Evolution Reaction Performance Synthesizing oxygen evolution reaction RuO 2 codoped RuO 2 Bimetallic Doped RuO 2 Mn X-ray photoelectron spectroscopy mV catalyst XPS dec 2020-03-26 02:43:18 Journal contribution https://acs.figshare.com/articles/journal_contribution/Bimetallic_Doped_RuO_sub_2_sub_with_Manganese_and_Iron_as_Electrocatalysts_for_Favorable_Oxygen_Evolution_Reaction_Performance/12032751 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<i><sub>x</sub></i>Fe<i><sub>y</sub></i>Ru<sub>1–<i>x</i>–<i>y</i></sub>O<sub>2</sub> with an outstanding OER activity as compared to pure RuO<sub>2</sub>, one of the state-of-the-art OER catalysts. The synthesized codoped RuO<sub>2</sub> with a Mn/Fe molar ratio of 1 reflected a Tafel slope of only 41 mV dec<sup>–1</sup>, which is appreciably lower than 64 mV dec<sup>–1</sup> for pure RuO<sub>2</sub>. 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.