摘要
The development of highly active,low-cost,and durable electrocatalysts is crucial for the efficient glycerol oxidation reaction(GOR).Herein,a Cu-doped,self-supported NiCo_(2)O_(4)nanosheet array catalyst grown on nickel foam(Cu-NiCo_(2)O_(4)/NF)was fabricated through a simple electrodeposition method followed by thermal annealing.The resulting nanosheet arrays are uniformly anchored on the conductive NF substrate,forming a three-dimensional nanoflower-like architecture that offers abundant accessible active sites and enhanced electronic conductivity.Moreover,Cu doping effectively tailors the electronic structure of NiCo_(2)O_(4),optimizing the adsorption and transformation of key glycerol oxidation intermediates.This synergistic effect significantly lowers charge transfer resistance and promotes rapid electron transport.Benefiting from these structural and electronic advantages,the Cu-NiCo_(2)O_(4)/NF catalyst achieves a current density of 10 mA·cm^(-2)at a low overpotential of 1.22 V vs.reversible hydrogen electrode(RHE).It delivers a remarkable glycerol conversion rate of 90.4%with a formate Faradaic efficiency of 94.3%at 1.35 V vs.RHE.Furthermore,the catalyst exhibits excellent long-term electrochemical durability with sustained catalytic performance during extended operation.This work offers a promising strategy to boost the electrocatalytic activity of NiCo_(2)O_(4)through Cu doping,providing new insights into the design of efficient GOR electrocatalysts and contributing to the high-value utilization of biomass-derived molecules and the advancement of green electrochemic al energ y technologies.
基金
supported by the National Natural Science Foundation of China(No.22302051)
Hainan Provincial Natural Science Foundation of China(No.223QN186)
Scientific Research Starting Foundation of Hainan University(No.KYQD(ZR)-22018)
the specific research fund of the Innovation Platform for Academicians of Hainan Province(No.YSPTZX202123)。
