Abstract
In order to effectively and safely produce, deposit and carry H2 gas, the exploration of the“on–off”switch for demand-based H2 generation from completely N2H4·H2O dehydrogenation is a practically important matter. Herein, we first design and synthesize a battery of nickel molybdate nanorods (NMN)-stabilized NixPty bimetallic nanoparticles (NixPty/NMN), by immobilization of ultrafine NiPt nanoparticles at the surface of nickel molybdate nanorods (NMN), for the high-efficiency and selective demand-based H2 generation from completely N2H4·H2O dehydrogenation. Among them, NMN is synthesized from nickel chloride and sodium molybdate under green hydrothermal condition. Then, the optimized nano-catalyst Ni1Pt1/NMN exhibits the highest turnover frequency (TOF) of 3750 h−1 in H2 generation from N2H4·H2O dehydrogenation at 50 °C with 100 % H2 selectivity, due to its excellent synergistic effect. The comparison of other common supports, including Co3O4, Fe3O4, ZnO, ZrO2 and MoS2, has highlighted the vital role of NiMoO4 nanorods in N2H4·H2O dehydrogenation. More interestingly, the significantly selective“on–off”switch for on-demand H2 generation from N2H4·H2O dehydrogenation has been successfully developed by pH adjusting.
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