Ambient electrocatalytic hydrogenation reactions(EHRs),such as biomass hydrogenation reaction and nitrogen reduction reaction(NRR),have aroused great research interest in recent years.However,to achieve high-performance EHRs,high-efficiency electrocatalysts are necessary to be developed,which need to meet the requirements of superior hydrogenation activities without interference by the thermodynamically favored hydrogen evolution reaction(HER).Therefore,the development of effective strategies,capable of effectively inhibiting the HER activity and concurrently improving the hydrogenation activity of an electrocatalyst,are highly desirable.In this respect,our group has recently developed the regulation strategies of crystal facets and catalyst/electrolyte interface to achieve these objectives,demonstrating great potential for designing and developing high-efficiency hydrogenation catalysts and catalysis systems.