Synthesis and Hydrazine-Assisted Overall Water Splitting Performance of Ru Nanoclusters/MoO(3-x )Nanobelt Bifunctional Catalyst

This work reports a bifunctional catalyst consisting of ultra-small Ru nanoclusters anchored onto oxygenvacancy-enriched MoO3-x, nanobelts (Ru/MoO3-x). The obtained catalyst exhibited excellent hydrazine oxidation reaction (HzOR) and hydrogen evolution reaction (HER) performances with a low overpotential of -79 and -27 mV at 10 mA.cm(-2), respectively. And the assembled hydrazine-assisted overall water splitting (OWS) device required a low cell voltage of only 13 mV, significantly better than commercial 20% Pt/C and some recently reported catalysts. Such excellent performance is mainly attributed to Ru nanoclusters facilitating dehydrogenation of N2H2, in HzOR and balancing of H* adsorption/desorption in HER and the abundant electrochemical active sites, optimized electron transfer kinetics resulting from oxygen vacancies in MoO3-x and Ru/MoO3-x heterostructures.