期刊
ACS NANO
卷 7, 期 7, 页码 6017-6023出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn401720x
关键词
gold nanoparticles; silicon surfaces; galvanic displacement; galvanic exchange; underpotential deposition; photoelectrochemistry; solar fuel
类别
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2012R1A1A2006038]
- National Research Foundation of Korea [2012R1A1A2006038] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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