Hydrogen adsorption and hydrogen evolution reaction on a polycrystalline Pt electrode studied by surface-enhanced infrared absorption spectroscopy

Kunimatsu, Keiji; Senzaki, Takahiro; Samjeské, Gabor; Tsushima, Minoru; Osawa, Masatoshi

doi:10.1016/j.electacta.2006.12.007


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Hydrogen adsorption and hydrogen evolution reaction on a polycrystalline Pt electrode studied by surface-enhanced infrared absorption spectroscopy

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Title:	Hydrogen adsorption and hydrogen evolution reaction on a polycrystalline Pt electrode studied by surface-enhanced infrared absorption spectroscopy
Authors:	Kunimatsu, Keiji Browse this author
	Senzaki, Takahiro Browse this author
	Samjeské, Gabor Browse this author
	Tsushima, Minoru Browse this author
	Osawa, Masatoshi Browse this author →KAKEN DB
Keywords:	Electrocatalysis
	Hydrogen adsorption
	Hydrogen evolution reaction
	Pt
	IR spectroscopy
Issue Date:	10-May-2007
Publisher:	Elsevier Ltd.
Journal Title:	Electrochimica Acta
Volume:	52
Issue:	18
Start Page:	5715
End Page:	5724
Publisher DOI:	10.1016/j.electacta.2006.12.007
Abstract:	Hydrogen evolution reaction (HER) on a polycrystalline Pt electrode has been investigated in Ar-purged acids by surface-enhanced infrared absorption spectroscopy and electrochemical kinetic analysis (Tafel plot). A vibrational mode characteristic to H atom adsorbed at atop sites (terminal H) was observed at 2080–2095 cm−1. This band appears at 0.1 V (RHE) and grows at more negative potentials in parallel to the increase in hydrogen evolution current. Good signal-to-noise ratio of the spectra enabled us to establish the quantitative relation between the band intensity (equivalently, coverage) of terminal H and the kinetics of HER, from which we conclude that terminal H atom is the reaction intermediate in HER and the recombination of two terminal H atoms is the rate-determining step. The quantitative analysis of the infrared data also revealed that the adsorption of terminal H follows the Frumkin isotherm with repulsive interaction.
Relation:	http://www.sciencedirect.com/science/journal/00134686
Type:	article (author version)
URI:	http://hdl.handle.net/2115/26414
Appears in Collections:	触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大澤雅俊

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