Platinum Monolayer Electrocatalyst on Gold Nanostructures on Silicon for Photoelectrochemical Hydrogen Evolution

被引：98

作者：

Kye, Joohong ^{[1
]}

Shin, Muncheol ^{[1
]}

Lim, Bora ^{[1
]}

Jang, Jae-Won ^{[2
]}

Oh, Ilwhan ^{[3
]}

Hwang, Seongpil ^{[1
]}

机构：

[1] Myongji Univ, Dept Chem, Yongin 449728, South Korea

[2] Pukyong Natl Univ, Dept Phys, Pusan 608737, South Korea

[3] Kumoh Natl Inst Technol, Dept Appl Chem, Gumi 730701, South Korea

来源：

ACS NANO | 2013年 / 7卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

gold nanoparticles; silicon surfaces; galvanic displacement; galvanic exchange; underpotential deposition; photoelectrochemistry; solar fuel; P-TYPE SILICON; GALVANIC DISPLACEMENT; UNDERPOTENTIAL DEPOSITION; SEMICONDUCTOR SURFACES; TUNGSTEN CARBIDE; METAL; WATER; ELECTRODES; CATALYSTS; CELLS;

D O I：

10.1021/nn401720x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pt monolayer decorated gold nanostructured film on planar p-type silicon is utilized for photoelectrochemical H-2 generation in this work. First, gold nanostructured film on silicon was spontaneously produced by galvanic displacement of the reduction of gold ion and the oxidation of silicon in the presence of fluoride anion. Second, underpotential deposition (UPD) of copper under illumination produced Cu monolayer on gold nanostructured film followed by galvanic exchange of less-noble Cu monolayer with more-noble PtCl62-. Pt(shell)/Au(core) on p-type silicon showed the similar activity with platinum nanoparticle on silicon for photoelectrochemical hydrogen evolution reaction in spite of low platinum loading. From Tafel analysis, Pt(shell)/Au(core) electrocatalyst shows the higher area-specific activity than platinum nanoparticle on silicon demonstrating the significant role of underlying gold for charge transfer reaction from silicon to H+ through platinum catalyst.

引用

页码：6017 / 6023

页数：7

共 32 条

[1] Platinum monolayer fuel cell electrocatalysts [J].