Effect of reduction–oxidation treatment on the catalytic activity over tin oxide supported platinum catalysts

Abstract

In precious metal-oxide catalyst system, the support materials strongly affect the catalytic activity. Especially the term of strong metal-support interaction is well known: Tauster . It was also demonstrated that this interaction could modify the catalytic activity of precious metals in different reactions. Accordingly, elucidating these phenomena will be the useful guide for the development of new class of active catalysts. Thus, we had focused on the chemical interaction between platinum and oxide and reported several results. Tin oxide supported platinum catalysts were heat-treated under oxidizing or reducing atmospheres at various temperatures, and their catalytic activity for methane combustion and electrochemical oxidation of CO was investigated. The resulting catalysts exhibited the peculiar microstructure and catalytic activity because of the metal-support interaction. r

Temperature-Dependent Local Structural Properties of Redox Pt Nanoparticles on TiO2 and ZrO2 Supports

“…Even though the SMSI can enhance catalyst stability, it can also cause local structural changes that can decrease catalyst reactivity [4][5][6][7]. A wide variety of experiments have been performed on different metal-oxide supports, including TiO x , CeO x , VO x , SnO x , and AlO x to assess if and how these oxides can improve the stability of noble metal catalysts, including Pt, Au, Ag, and Pd [8][9][10][11]. Platinum is commonly used as catalysts for industrial applications as well as for academic research [1][2][3][4][5][6]12].…”

SnO2 nanocluster supported Pt catalyst with high stability for proton exchange membrane fuel cells

“…Tin oxide (SnO 2 ), with n-type semiconducting property and good electrochemical stability, has been proposed as a potential catalyst support material for fuel cell application [10][11][12][13][14][15][16][17][18]. Previous studies have shown that SnO 2 can promote the electro-oxidation of CO, methanol, and ethanol due to the formation of OH species at low potentials and the strengthened metal-support interaction [19,20].…”

CO oxidation over Pt/SnO2 catalysts

“…Tin dioxide is an n-type semiconductor with a wide band gap (3.6 eV) and rutile bulk structure [13]. In the past decades, SnO 2 has attracted much attention for its various applications in catalysis, gas sensing, rechargeable Li battery and optical electronic devices [13][14][15][16]. It should be marked that SnO 2 is one of the most widely used semiconductor oxides for the manufacturing of sensors applied in the environment monitoring [17].…”