Journal
ACS ENERGY LETTERS
Volume 3, Issue 7, Pages 1698-1707Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.8b00888
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Funding
- Major State Basic Search Program [2014CB46505]
- National Natural Science Foundation of China [51372056, 51472064, 51672057, 51722205]
- National Science Fund for Distinguished Young Scholars [51525201]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [11421091]
- International Science & Technology Cooperation Program of China [2012DFR50020]
- Fundamental Research Funds for the Central Universities [HIT.BRETIV.201801]
- Natural Science Foundation of Heilongjiang Province [E2018032]
- Program for New Century Excellent Talents in University [NCET-13-0174]
- NSF [DMR-1508558]
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Spinel-type oxides have been found to be active electrocatalysts for OER. However, their semiconductor character severely limits their catalytic performance. Herein, we report a facile solvothermal pathway for the synthesis of spinel-type NixFe3-xO4 oxides/Ni metal nanocomposites. The good electrical contact between the metal and semiconductor oxide interface and well tuned compositions of NixFe3-xO4 spinel oxides are crucial to achieve better OER performance. Specifically, the NixFe3-xO4/Ni nanocomposite sample prepared from a metal precursor ratio of y = 0.15 [y = Fe/(Fe + Ni)] that results in an x value of about 0.36 exhibits catalytic activity with an overpotential of 225 mV to achieve an electrocatalytic current density of j = 10 mA cm(-2) and a Tafel slope of 44 mV dec(-1) in alkaline electrolyte. This study not only provides new perspectives to designing nanocomposite catalysts for OER but also opens a promising avenue for further enhancing electrocatalytic performance via interface and composition engineering.
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