I will present our recent work on the development of an efficienct catalyst for electrochemical overall water splitting. Trimetallic NiFeMo alloy is synthesized by hydrothermal deposition from inorganic precursors and subsequent low-temperature thermal annealing. A complete cell made of NiFeMo electrodes on nickel foam exhibits a low voltage of 1.45 V at 10 mA/cm<sup>2</sup> as a result of low over-potentials for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). High-resolution transmission electron microscopy reveals that nanometer-sized single crystal domains of Ni, Fe, and Mo are intimately integrated at atomic level, which enables a synergistic effect of metallic Ni, Fe, and Mo for efficient HER; while self-formed Ni-Fe-Mo (oxy)hydroxides on the surface of NiFeMo anode become active sites for OER. Such multi-metallic alloy and its (oxy)hydroxides represent a typical HER/OER catalyst couple,

Trimetallic NiFeMo for overall electrochemical water splitting with a low cell voltage

256th National Meeting (2018)

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