Mesoporous\nBimetallic Au@Rh Core–Shell Nanowires\nas Efficient Electrocatalysts for pH-Universal Hydrogen Evolution

Abstract

Electrochemical\nwater splitting is one hopeful strategy for hydrogen\nproduction, and designing efficient hydrogen evolution electrocatalysts\nunder universal pH is one of the most critical topics. Here, we have\nsuccessfully prepared mesoporous bimetallic core–shell nanostructures\nwith Au nanowires (Au NWs) as cores and mesoporous Rh as shells (Au@mRh\nNWs). Due to the one-dimensional structure and mesoporous core–shell\nstructure, Au@mRh NWs possess more active sites and provide the synergistic\neffect, leading to the great improvement of the electrochemical activity\ntoward the hydrogen evolution reaction under a wide range of pH. The\npresent work proposes a versatile strategy for preparing a bimetallic\ncore–shell structure with a mesoporous shell, which is highly\npromising for more electrocatalytic applications.