Developing highly active and cost-effective catalysts for the hydrogen evolution reaction(HER) is crucial for alkaline water electrolysis,but it remains a significant challenge.Herein,nickel(Ni) nanoparticles composit...Developing highly active and cost-effective catalysts for the hydrogen evolution reaction(HER) is crucial for alkaline water electrolysis,but it remains a significant challenge.Herein,nickel(Ni) nanoparticles composite partially confined in molybdenum dioxide(MoO_(2)) lattices was developed via a facile strong metal-support interaction(SMSI) tuning strategy.Experimental analyses revealed that the regulation of the electronic structure of Ni@MoO_(2) by SMSI significantly alleviated the work function of Ni@MoO_(2),accelerating electron transfer and optimizing adsorption of hydrogen intermediates,thereby boosting the HER activity.The optimized Ni@MoO_(2) catalyst exhibited an overpotential of only 18 and 30 mV to reach a current density of 10 mA cm^(-2),in alkaline freshwater and seawater,respectively,surpassing the commercial Pt/C catalysts.A two-electrode system with Ni@MoO_(2) as a cathode required a voltage of 1.46 V to attain the current density of 10 mA cm^(-2),with no performance degradation after 500 h.This two-electrode configuration exhibited a solar-to-hydrogen conversion efficiency of up to 20.10% when used in constructing a solar-powered water electrolysis electrolyzer.This study provides a promising strategy for designing stable and efficient catalysts for industrial hydrogen production.展开更多
基金financially supported by the National Natural Science Foundation of China(No.22369025)Yunnan Applied Basic Research Projects(Nos.202201AT070095,202301AT070098,202301AT070107,202401AT070438,and 202401AT070433)+2 种基金the Education Reform Research Project of Yunnan University(No.2021Z06)Yunnan Provincial University Service Key Industry Science and Technology Program(No.FWCYBSPY2024021)Yunnan Revitalization Talent Support Program
文摘Developing highly active and cost-effective catalysts for the hydrogen evolution reaction(HER) is crucial for alkaline water electrolysis,but it remains a significant challenge.Herein,nickel(Ni) nanoparticles composite partially confined in molybdenum dioxide(MoO_(2)) lattices was developed via a facile strong metal-support interaction(SMSI) tuning strategy.Experimental analyses revealed that the regulation of the electronic structure of Ni@MoO_(2) by SMSI significantly alleviated the work function of Ni@MoO_(2),accelerating electron transfer and optimizing adsorption of hydrogen intermediates,thereby boosting the HER activity.The optimized Ni@MoO_(2) catalyst exhibited an overpotential of only 18 and 30 mV to reach a current density of 10 mA cm^(-2),in alkaline freshwater and seawater,respectively,surpassing the commercial Pt/C catalysts.A two-electrode system with Ni@MoO_(2) as a cathode required a voltage of 1.46 V to attain the current density of 10 mA cm^(-2),with no performance degradation after 500 h.This two-electrode configuration exhibited a solar-to-hydrogen conversion efficiency of up to 20.10% when used in constructing a solar-powered water electrolysis electrolyzer.This study provides a promising strategy for designing stable and efficient catalysts for industrial hydrogen production.
