Fe-doped NiCo2S4 catalyst derived from ZIF – 67 towards efficient hydrogen evolution reaction |
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Affiliation: | Anhui Jianzhu University, 292 Ziyun Road, Hefei, Anhui 230022, PR China |
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Abstract: | The development of economical, efficient and stable non-noble metal catalysts plays a key role in electrocatalytic hydrogen evolution. NiCo2S4 has been proved to be an efficient non-noble catalyst, to further improve its electrocatalytic performance is a meaningful work. In this paper, the effects of Fe doping on electrochemical performance of NiCo2S4 is investigated. The Fe-doped NiCo2S4 catalyst is prepared by a facile solvothermal method with metal-organic-framework (MOF, ZIF-67) as template, and it exhibits an improved hydrogen evolution reaction (HER) performance with an overpotential of 181 mV at 10 mA cm?2, a Tafel slope of 125 mV dec?1 compared with that of NiCo2S4 (252 mV overpotential and 149 mV dec?1 Tafel slope). The combination of improved conductivity, mesopores architecture retained with the ZIF-67 template, which result the reduced internal resistance, enhanced charge transportation as well as large electrochemical double-layer capacitance. This work provides an effective and synergistic strategy for fabricating NiCo2S4-based catalysts toward electrochemical water splitting. |
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Keywords: | Fe doping ZIF-67 Hydrogen evolution reaction |
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