Insights of the efficient hydrogen evolution reaction performance in bimetallic Au₄Cu₂ nanoclusters

Abstract

The bimetallic nanocluster catalyst (Au4Cu2/MoS2) exhibits remarkable efficiency and durability with enhanced charge transfer, highlighting the structure–property relationship crucial for atomic-level understanding of electrocatalysis.

Construction of Ultrathin CuAuAg Nanosheet-Assembled Three-Dimensional Nanoflowers for Photothermal Conversion and Electrocatalytic Hydrogen Evolution

“…The slope of Tafel curves is adopted to indicate the rate-limiting step in the HER process where the Volmer–Heyrovsky mechanism and Tafel mechanism are competitive. − As depicted in Figure c, the Tafel slope is determined to be 120 mV dec –1 for Cu 10.5 Au 58.4 Ag 31.1 NFs. This value is notably smaller than the slopes of Cu 71.4 Ag 28.6 NFs (201.0 mV dec –1 ) and Au NCs (220.4 mV dec –1 ), suggesting that the Volmer–Heyrovsky pathway is dominant in the reaction mechanism.…”

Universal pH electrocatalytic hydrogen evolution with Au-based high entropy alloys

“…19,20 These distinct attributes have driven scientific exploration in this field, resulting in reported research on various compositions involving Au–Pd, Au–Ni, Au–Cu and others. 15,19,21–23 However, the extent of modification in the electronic properties is confined by the range of compositional tunability, limiting the performance. 24…”