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

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

Kunimatsu, Keiji; Senzaki, Takahiro; Samjeské, Gabor et al.

Electrochimica Acta, 2007, 52(18), 5715-5724

Permalink : https://hdl.handle.net/2115/26414

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アクセス権	open access
URI	https://hdl.handle.net/2115/26414
タイトル	Hydrogen adsorption and hydrogen evolution reaction on a polycrystalline Pt electrode studied by surface-enhanced infrared absorption spectroscopy
著者	Kunimatsu, Keiji ; Senzaki, Takahiro ; Samjeské, Gabor ; Tsushima, Minoru ; Osawa, Masatoshi
著者名 Kunimatsu, Keiji
著者名 Senzaki, Takahiro
著者名 Samjeské, Gabor
著者名 Tsushima, Minoru
e-Rad_Researcher 00108466 著者名 Osawa, Masatoshi
言語	英語
キーワード	Electrocatalysis
	Hydrogen adsorption
	Hydrogen evolution reaction
	Pt
	IR spectroscopy
発行日	2007-05-10
出版者	Elsevier Ltd.
収録物名	Electrochimica Acta
巻(号)	52(18)
ページ	5715-5724
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0013-4686
関連情報	URI http://www.sciencedirect.com/science/journal/00134686
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.electacta.2006.12.007