摘要
以阳极氧化处理的碳布(ACC)为导电基体,利用Cu的欠电位沉积(UPD)和Cu与Pt金属前驱体之间的置换反应制备了Pt/碳布(Pt/ACC)电极材料,对其微观结构进行了表征并考察了其电催化分解水制氢性能。结果表明,通过控制Cu的沉积电位可以有效地控制Pt的负载量和其在ACC表面的分散状态。随着沉积电位在0.32~0.15 V vs.RHE变化,Pt/ACC电极材料中Pt的负载量呈线性增加;在0.5 mol/L H2SO4溶液中的产氢反应结果表明,随着Pt负载量的增加,析氢起始电位逐渐降低,当沉积电位为0.15 V vs.RHE时,Pt在ACC表面的负载量为588μg/cm2,所得Pt/ACC电极材料起始电位为-0.05 V vs.RHE,且达到10 m A/cm2电流密度所需的过电位仅为56 m V,Tafel斜率为34.2 m V/dec,电极的催化产氢活性与块体Pt箔相近。
Pt/anodized carbon cloth( Pt/ACC) electrodes were prepared via Cu underpotential deposition and replacement reaction between Cu and Pt precursor with ACC as conductive substrates.Their microstructure and electrocatalytic activity for hydrogen production from water were investigated.The results showed that the amount of Pt loading and dispersion of Pt on ACC could be controlled by adjusting Cu deposition potential. When deposition potential changed from 0. 32 to 0. 15 V vs. RHE,the amount of Pt loading on ACC increased linearly. The result of hydrogen evolution in H2SO4 aqueous solution( 0. 5 mol/L) revealed that with the increasing amount of Pt loading,the onset potential for hydrogen evolution decreased gradually. When deposition potential was 0. 15 V vs. RHE,the amount of Pt loading was only 588 μg/cm2 and the obtained Pt/ACC electrode showed similar activity to Pt foil with a onset potential of- 0. 05 V vs. RHE,a overpotential of 56 m V to reach a current density of 10 m A/cm2,and a Tafel slope of 34. 2 m V/dec.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2016年第11期1227-1231,1294,共6页
Fine Chemicals
基金
国家自然科学基金(21463001
21263001)
宁夏自然科学基金(NZ15102)
北方民族大学校级项目(2014XZZ02
2014XYZ02)
北方民族大学国基前期培育项目(2014QZP04)~~
关键词
Cu
欠电位沉积
碳布
PT
电催化
产氢
copper
underpotential deposition
carbon cloth
platinum
electrocatalysis
hydrogen evolution