首页|Flexible bifunctional electrocatalyst(Ni@(Ni,Fe)Se2/Ni@CC)by adjusting d-band center for high-efficiency HER and overall water splitting
Flexible bifunctional electrocatalyst(Ni@(Ni,Fe)Se2/Ni@CC)by adjusting d-band center for high-efficiency HER and overall water splitting
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Nickel foam is widely used as a collector for electrocatalysts because of its excellent electrical conductivity;how-ever,it is prone to react with elements such as oxygen,sulfur,and phosphorus during the growth of electrode materials,which makes it brittle and fragile,thus limiting its large-scale application.In this study,bifunctional electrocatalysts with flexible multilevel Ni-based nanoclusters Ni@(Ni,Fe)Se2/Ni@CC were synthesized on car-bon cloth(CC)by hydrothermal and electrodeposition methods;these flexible electrocatalysts are convenient for subsequent industrial applications.At a current density of 10 mA cm-2,the overpotentials of the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)reached 98 and 224 mV,respectively,exceeding the catalytic effects of most metal-based collectors.The overall water-splitting potential of the catalyst was only 1.56 V at 10 mA cm-2,and the performance was maintained after a 24 h stability test.Ni@(Ni,Fe)Se2/Ni@CC significantly improved the activity in alkaline environments by modulating the center of the d-band,thereby increasing the adsorption capacity of the catalyst for H ions.In this study,we improved the intrinsic activity and charge transfer of transition metal electrocatalysts by modifying the carbon cloth and constructing multilevel Ni-based nanoclusters,which provided some insights into the rational design of flexible bifunctional electrocat-alysts.
Flexible bifunctional electrocatalystsNickel-based nanoclustersMultilevel architectureHEROverall water splitting
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