Journal
INORGANIC CHEMISTRY FRONTIERS
Volume 7, Issue 19, Pages 3627-3635Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0qi00611d
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Funding
- National Natural Science Foundation of China [51704064, 51971058]
- Fundamental Research Funds for the Central Universities [N182312007, N2023001]
- Program for Liaoning Innovative Talents in University [LCR2018016]
- Liaoning Provincial Natural Science Foundation of China [2019-MS-244]
- Liaoning Revitalization Talents Program [XLYC1907031]
- Max Planck-POSTECH-Hsinchu Center for Complex Phase Materials
- Max Planck Society
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It is increasingly important to develop an efficient OER catalyst that can provide high current density at low overpotentials to improve water splitting efficiency. Here, layered Ni3S2/Ag/Ni3S2(N2A1) nanosheets have been grown directly on carbon clothviaa facile alternating electrodeposition method. Compared to the electrocatalyst Ni3S2/Ag(N1A1) with Ag as the innermost layer, the Ag/Ni3S2(A1N1) catalyst with Ni(3)S(2)nanosheets as the initial layer takes greater advantage of the low impedance for water splitting. Benefitting from the coexistence of different morphologies of Ni3S2, quasi-three-dimensional layered N2A1 exhibits excellent catalytic activity and stability toward OER, with an overpotential of 187 mV for 10 mA center dot cm(-2). Notably, based on the temperature-dependent measurement, the lower activation energy (E-a) of N2A1 is observed for the superior OER process. The roles of Ag in N2A1 were uncovered as affecting charge rearrangement, increasing electron transfer, and controlling morphology of Ni3S2.
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