【摘 要】
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Electrochemical water splitting is a facile and effective route to generate pure hydrogen and oxygen.However,the sluggish kinetics of hydrogen evolution reaction (HER) and especially oxygen evolution reaction (OER) hinder the water splitting efficiency.Me
【机 构】
：
State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beiji
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Electrochemical water splitting is a facile and effective route to generate pure hydrogen and oxygen.However,the sluggish kinetics of hydrogen evolution reaction (HER) and especially oxygen evolution reaction (OER) hinder the water splitting efficiency.Meanwhile,the high-cost of noble-metal catalysts limit their actual application.It is thus highly urgent to exploit an economical and earth-abundant bifunctional HER and OER electrocatalyst to simplify procedure and reduce cost.Herein,we synthesize the three-dimensionally ordered macro-/mesoporous (3DOM/m) NixCo100-x alloys with distinctive structure and large surface area via a dual-templating technique.Among them,the 3DOM/m Ni61Co39 shows the lowest overpotentials of 121 mV and 241 mV at 10 mA/cm2 for HER and OER,respectively.Furthermore,when employed for water splitting,the Ni61Co39 only requires 1.60 V to approach 10 mA/cm2 and presents excellent stability.These encouraging performances of the Ni61Co39 render it a promising bifunctional catalyst for overall water splitting.
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