INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Effective Construction of the NiFe-P/Graphene Bifunctional Electrocatalyst for Overall Water Splitting |
YANG Zhiqi1, SUN Li1,2,*, SONG Weiming1, ZHAO Bing1,2, YE Jun1, CHEN Zhaohui1, ZHAO Huaping1, WANG Fuyang1
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1 School of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, Heilongjiang, China 2 Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar 161006, Heilongjiang, China |
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Abstract To gain bifunctional electrocatalyst with low cost and high catalytic activity for HER and OER, we used the principle of group coordination, and then the NiFe-P/RGO bifunctional catalyst was successfully prepared by a hydrothermal-phosphatizing pyrolysis method, in which graphite oxide was selected as the host carrier, nickel nitrate, potassium ferricyanide and trisodium citrate were acted as the raw materials. The chemical structure and morphological characterization of as-prepared catalysts were carried out by SEM, TEM, XRD, XPS and BET, respectively. Moreover, the alkaline hydrolysis performance of NiFe-P/RGO electrocatalyst was tested. The results exhibited that the effective recombination between highly active NiFe-P and good conductive RGO can vastly accelerate ion/electron charge transport to increase electrocatalytic performance. For HER and OER, NiFe-P/RGO manifests excellent bifunctional activity with low overpotentials was 125 mV and 218 mV at a current density of 10 mA/cm2, respectively. The electrolyzer equipped with the NiFe-P/RGO as both cathode and anode requires only 1.52 V at a current density of 10 mA/cm2 with superior catalytic durability.
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Published:
Online: 2023-07-10
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Fund:National Natural Science Foundation of China (21978140,21501104),Postdoctoral Foundation of Heilongjiang Province (LBH-Z18231),Basic Scientific Research Funds for Universities Affiliated to Heilongjiang Province (YSTSXK135409211,YSTSXK201845),Open Project Fund of Heilongjiang Province Key Laboratory of Surfactants and Industrial Additives (BMHXJKF 007),and Qiqihar University Graduate Innovative Research Project (YJSCX2020004). |
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