Ligand effect of SnO2 on a Pt–Ru catalyst and the relationship between bond strength and CO tolerance

Tatsuya Takeguchi; Akane Kunifuji; Napan Narischat; Mikio Ito; Hidenori Noguchi; Kohei Uosaki; Shin R. Mukai

doi:10.1039/C5CY01523E

Ligand effect of SnO₂ on a Pt–Ru catalyst and the relationship between bond strength and CO tolerance

Tatsuya Takeguchi,*^a Akane Kunifuji,^b Napan Narischat,^ab Mikio Ito,^c Hidenori Noguchi,^d Kohei Uosaki^d and Shin R. Mukai^b

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* Corresponding authors

^a Department of Chemistry and Biological Sciences, Faculty of Science and Engineering, Iwate University, Iwate 020-8551, Japan
E-mail: takeguch@iwate-u.ac.jp

^b Graduate School of Engineering, Hokkaido University, Hokkaido 060-8628, Japan

^c Department of Chemical Science and Engineering, National Institute of Technology, Tokyo College, 1220-2 Kunugida-machi, Hachioji, Tokyo 193-0997, Japan

^d International Center for Materials Nanoarchitectonics (MANA) and Global Research Center for Environment and Energy Based on Nanomaterials Science (GREEN), National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan

Abstract

Pt–Ru/SnO₂/C catalysts were prepared by a rapid quenching method. The structure and morphology of Pt–Ru particles in Pt–Ru/SnO₂/C are controlled to obtain the same Pt–Ru particle as that in a commercial Pt–Ru catalyst. The Pt–Ru/SnO₂/C and commercial Pt–Ru catalysts were characterized by X-ray diffraction and scanning transmission electron microscopy. Electrochemical activities were evaluated by CO stripping voltammetry, single cell tests, in situ infrared reflection–absorption spectroscopy (IRRAS) and surface-enhanced infrared absorption spectroscopy (SEIRAS). The Pt–Ru/SnO₂/C catalyst showed the same structure, morphology and catalytic activity for hydrogen oxidation reaction (HOR) in the absence of CO as those of a Pt–Ru/C catalyst. Both the activity for electrochemical CO oxidation and Pt–CO bond strength were quantitatively evaluated. The addition of SnO₂ decreased the Pt–CO bond strength with maintained HOR activity to enhance CO tolerance.

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https://doi.org/10.1039/C5CY01523E

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Paper

Submitted

10 Sep 2015

Accepted

01 Dec 2015

First published

03 Dec 2015

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Catal. Sci. Technol., 2016,6, 3214-3219

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Ligand effect of SnO₂ on a Pt–Ru catalyst and the relationship between bond strength and CO tolerance

T. Takeguchi, A. Kunifuji, N. Narischat, M. Ito, H. Noguchi, K. Uosaki and S. R. Mukai, Catal. Sci. Technol., 2016, 6, 3214 DOI: 10.1039/C5CY01523E

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Catalysis Science & Technology

Ligand effect of SnO₂ on a Pt–Ru catalyst and the relationship between bond strength and CO tolerance

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Ligand effect of SnO₂ on a Pt–Ru catalyst and the relationship between bond strength and CO tolerance

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