Bimetallic Carbides-Based Nanocomposite as Superior Electrocatalyst for Oxygen Evolution Reaction

• DOI: 10.1021/acsami.7b01096
• Publication Date: 2017-05-05T18:25:39Z
• Authors: Yu-Jia Tang; Chun-Hui Liu; Wei Huang; Xiao-Li Wang; Long-Zhang Dong; Shun-Li Li; Ya-Qian Lan
• Keywords: Oxygen evolution; Overpotential; Bimetallic strip

The development of highly efficient and low-cost oxygen evolution electrocatalysts is extremely imperative for the new energy technology. Transition metal carbides have been investigated as remarkable hydrogen reaction (HER) but undesired (OER) need further study. Here, a cobalt-molybdenum-based bimetallic carbide coated by N-doped porous carbon anchored on reduced graphene oxide film (Co6Mo6C2/NCRGO) synthesized directly carbonizing Co-doped polyoxometalate/conductive polymer/graphene (Co-PCG) precursors. precise control Co/Mo molar ratio in Co-PCG precursor critical importance to synthesize pure phase Co6Mo6C2. As active robust OER electrocatalyst, Co6Mo6C2/NCRGO composite exhibits excellent activity alkaline solution, affording low overpotential 260 mV versus RHE at 10 mA cm-2, small Tafel slope 50 dec-1, well long-term stability. superior performances are strongly associated with Co6Mo6C2 particles, polypyrrole (PPy)-derived carbon, conductive RGO films. Remarkably, it first evidence that were used catalysts such high activity.