Journal
NANO ENERGY
Volume 58, Issue -, Pages 680-686Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2019.01.050
Keywords
Power to hydrogen; Metal-organic frameworks; Trifunctional electrocatalysts; Zinc-air batteries; Water splitting
Categories
Funding
- National Natural Science Foundation of China [21571053, 51872075]
- University of Henan Province [16IRTSTHN004]
- 111 Project [D17007]
- Henan Center for Outstanding Overseas Scientists [GZS2018003]
- University of Waterloo
- U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office. Argonne National Laboratory [DE-AC02-06CH11357]
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Here we report a synthesis of nickel cobalt oxysulfide nanocage trifunctional electrocatalysts by sulfurizing zeolitic imidazolate framework-67. Benefiting from the synergistic coupling of nickel cobalt oxysulfide and N-doped carbon polyhedron in a hollow dodecahedral structure, the nickel cobalt oxysulfide nanocages exhibit superior trifunctional electrocatalytic activity and durability towards oxygen reduction and evolution, and hydrogen evolution reactions in alkaline conditions. Moreover, the nickel cobalt oxysulfide nanocage trifunctional electrocatalysts are used in an air cathode for a rechargeable zinc-air battery and in both anode and cathode for overall water splitting, where the water splitting is directly powered by the assembled zinc-air battery. Such integrative power-to-hydrogen device can operate stably over 17 h without visible energy efficiency losses for hydrogen gas production.
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