Fabricating energy-saving,inexpensive and high-activity electrocatalysts for overall water splitting has always been a significant challenge.Electrochemical deposition is considered as a promising method for large-sca...Fabricating energy-saving,inexpensive and high-activity electrocatalysts for overall water splitting has always been a significant challenge.Electrochemical deposition is considered as a promising method for large-scale industrial applications,but it is prone to generating dense compounds,which reduces the effective catalytic activity area of electrodes.Herein,a low-cost and high-performance bifunctional NiFeMn alloy@NiFeMn oxyhydroxide electrocatalyst was deposited by several minute electrodeposition.Due to the doping of manganese,this method effectively engineers a multi-level dendritic NiFeMn alloy and oxyhydroxide layer,and significantly reduces the energy barrier for the oxygen evolution reaction(OER)and hydrogen evolution reaction(HER),which has been proved by the density functional theory calculations.Specifically,the as-prepared catalyst shows excellent electrocatalytic performance for OER(219 mV)and HER(19 mV)at a current density of 10 mA cm^(−2).Experimentally and theoretically,the catalyst demonstrated extraordinary performance for overall water splitting and provides a new possibility for industrialization in the future.展开更多
基金supported by the National Natural Science Foundation of China(no.:51507104,62071307).
文摘Fabricating energy-saving,inexpensive and high-activity electrocatalysts for overall water splitting has always been a significant challenge.Electrochemical deposition is considered as a promising method for large-scale industrial applications,but it is prone to generating dense compounds,which reduces the effective catalytic activity area of electrodes.Herein,a low-cost and high-performance bifunctional NiFeMn alloy@NiFeMn oxyhydroxide electrocatalyst was deposited by several minute electrodeposition.Due to the doping of manganese,this method effectively engineers a multi-level dendritic NiFeMn alloy and oxyhydroxide layer,and significantly reduces the energy barrier for the oxygen evolution reaction(OER)and hydrogen evolution reaction(HER),which has been proved by the density functional theory calculations.Specifically,the as-prepared catalyst shows excellent electrocatalytic performance for OER(219 mV)and HER(19 mV)at a current density of 10 mA cm^(−2).Experimentally and theoretically,the catalyst demonstrated extraordinary performance for overall water splitting and provides a new possibility for industrialization in the future.
