【摘 要】
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Modulate the electronic structure and surface energy by nanostructure and heteroatom doping is an effi-cient strategy to improve electrocatalytic activity of hy
【机 构】
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Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials,College of Chemi
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Modulate the electronic structure and surface energy by nanostructure and heteroatom doping is an effi-cient strategy to improve electrocatalytic activity of hydrogen evolution reaction(HER).Herein,nickel incorporated WP2 self-supporting nanosheet arrays cathode was synthesized on carbon cloth(Ni-WP2 NS/CC)by in-situ phosphating reduction of the Ni-doped W03.It shows that heteroatom doping and the three-dimensional(3D)nanosheet arrays morphology both facilitate to reduce the interfacial transfer resistance and increase electrochemical-active surface areas,which effectively improve electrocatalytic hydrogen evolution reaction(HER)activity.The optimized catalyst,1％Ni-WP2 NS/CC,exhibits an out-standing electrocatalytic performance with an overpotential of 110 mV at 10 mA cm-2 and a Tafel slope of 65 mV dec-1 in the acid solution.DFT calculations further demonstrate the nickel doping can adjust the intrinsic structure of electronics,lower the Gibbs free energy of adsorption of hydrogen(ΔGH·),and effec-tively improve the HER performance.
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