Effect of Bimetallic Pd/Pt Clusters on the Sensing Properties of Nanocrystalline SnO<Subscript>2</Subscript> in the Detection of CO期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Effect of Bimetallic Pd/Pt Clusters on the Sensing Properties of Nanocrystalline SnO2 in the Detection of CO

Authors:	I. V. Malkov V. V. Krivetskii D. I. Potemkin A. V. Zadesenets M. M. Batuk J. Hadermann A. V. Marikutsa M. N. Rumyantseva A. M. Gas’kov

Affiliation:	1.Moscow State University,Moscow,Russia;2.Boreskov Institute of Catalysis, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia;3.Nikolaev Institute of Organic Chemistry, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia;4.ЕMАТ, University of Antwerp,Antwerpen,Belgium

Abstract:	Nanocrystalline tin dioxide modified by Pd and Pt clusters or by bimetallic PdPt nanoparticles was synthesized. Distribution of the modifers on the SnO₂ surface was studied by high-resolution transmission electron microscopy and energy dispersive X-ray microanalysis with element distribution mapping. It was shown that the Pd/Pt ratio in bimetallic particles varies over a broad range and does not depend on the particle diameter. The effect of platinum metals on the reducibility of nanocrystalline SnO₂ by hydrogen was determined. The sensing properties of the resulting materials towards 6.7 ppm CO in air were estimated in situ by electrical conductivity measurements. The sensor response of SnO₂ modified with bimetallic PdPt particles was a superposition of the signals of samples with Pt and Pd clusters.

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