Kwon, Yongkeun Hong, Doosun Jang, Jue-Hyuk Kim, Minjoong Oh, Sekwon Song, Donghoon Lim, Jeonghoon Yoo, Sung Jong Cho, Eunae 2024-01-19T09:00:06Z 2024-01-19T09:00:06Z 2023-09-07 2023-09 0926-3373 https://pubs.kist.re.kr/handle/201004/113330 In developing anion exchange membrane fuel cells (AEMFCs), the sluggish hydrogen oxidation reaction (HOR) under alkaline condition is one of the major challenges to be overcome. A screening process using the simple electrodeposition method suggests Ni-29Mo as the most promising composition among the prepared Ni-M (M= Co, Fe, Zn, Cr, Mo, W) and Ni-xMo (x = 22 similar to 33 at%) samples. Experimental analyses and theoretical computations demonstrate that the Ni-29Mo is composed of metallic nickel and molybdenum oxide (Ni-MoOx) domains and the hydrogen adsorption energy on metallic Ni is tailored in the presence of MoO2 towards the optimal value. The Ni-MoOx composite catalyst shows a superior HOR activity (1.12 mA/cm(2) @ 20 mV(RHE)), outperforming carbon supported platinum (Pt/C, 1.01 mA/cm(2) @ 20 mV(RHE)), the best HOR catalyst. An AEMFC fabricated using Ni-29Mo nanoparticles as an anode catalyst exhibits excellent performance, approximately half of the Pt/C counterpart cell, demonstrating practical applicability of the catalyst. English Elsevier BV A Ni-MoOx composite catalyst for the hydrogen oxidation reaction in anion exchange membrane fuel cell Article 10.1016/j.apcatb.2023.122740 1 Applied Catalysis B: Environmental, v.332 Applied Catalysis B: Environmental 332 N scie scopus 001054840700001 2-s2.0-85151884054 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article OXYGEN REDUCTION REACTION ROTATING-DISK ELECTRODE ALLOY CATALYSTS BINDING-ENERGY NICKEL METAL IN-SITU ALKALINE ELECTROCATALYSTS EFFICIENT MECHANISM Anion exchange membrane fuel cell Alkaline hydrogen oxidation reaction Hydrogen binding energy Nickel Molybdenum