Bimetallic nanoparticles of PtM (M=Au, Cu, Ni) supported on iron oxide: Radiolytic synthesis and CO oxidation catalysis

Yamamoto, Takao A.; Nakagawa, Takashi; Seino, Satoshi; Nitani, Hiroaki

doi:10.1016/j.apcata.2010.08.020

Cited by 86 publications

(50 citation statements)

References 19 publications

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“…Radiolysis can also be performed directly in the presence of the support and without stabilizer. An aqueous solution containing HAuCl4 and H2PtCl6 (1:1), 2-propanol and γ-Fe2O3 powder in suspension was irradiated by electron beam [100]. The resulting particles were 2.9 nm, and the XRD peak located between those of Pt (111) and Au (111) indicated that the particles were bimetallic.…”

Section: Surface Redox Methodsmentioning

confidence: 99%

Chemical Preparation of Supported Bimetallic Catalysts. Gold-Based Bimetallic, a Case Study

Louis

2016

Catalysts

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This review focuses on the chemical methods used to prepare supported bimetallic heterogeneous catalysts, i.e., bimetallic nanoparticles deposited on a support. The review is limited to the preparation of gold-based bimetallic catalysts and moreover to bimetallic nanoparticles supported on powder inorganic supports, i.e., on the surface or in the porosity, and not on model supports such as single crystals.

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Section: Surface Redox Methodsmentioning

confidence: 99%

Chemical Preparation of Supported Bimetallic Catalysts. Gold-Based Bimetallic, a Case Study

Louis

2016

Catalysts

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“…Modifiers are usually added to promote catalytic activity and enhance resistance to deactivation. At present, a lot of research on bimetallic catalysts used in the VOCs combustion concerns mainly Pt and Pd, and more recently Au [10][11][12]. Over the last few years, some studies have also been focused on the catalysts with combination of a noble metal and a base metal oxides for VOCs oxidation reactions.…”

Section: Introductionmentioning

confidence: 98%

Bimetallic Ru-Re/γ-Al2O3 catalysts for the catalytic combustion of propane: Effect of the Re addition

Baranowska

Okal

2015

Applied Catalysis A: General

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“…Meanwhile, a radiation-induced reduction method is a simple one-pot process for the synthesis of nanoparticles, which can be carried out in aqueous media without any polymer stabilizer or post-treatment (Belloni 2006;Belloni et al 1998). Our laboratory has synthesized various Pt-based bimetallic nanoparticles and demonstrated that irradiating a high-energy electron beam on a metal precursor solution with support powder dispersed in it yields supported fine nanoparticles only in several seconds of time scale Yamamoto et al 2010Yamamoto et al , 2011. The solvent water is radiochemically decomposed to give hydrated electrons which in turn reduce metal ions to metal nanoparticles: The conditions for the radiolytic synthesis have a large impact on the structure of resulting particles.…”

Section: Introductionmentioning

confidence: 99%

Effect of reduction enhancer on a radiolytic synthesis of carbon-supported Pt–Cu nanoparticles and their structural and electrochemical properties

et al. 2015

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In order to clarify the effect of reduction enhancer on the nanoparticle formation process and their structural and catalytic properties, carbon-supported Pt-Cu nanoparticles were synthesized by electron beam irradiation on an aqueous precursor solution in the presence/absence of reduction enhancer. In the absence of reduction enhancer, tetravalent platinum oxide particles of approximately 1 nm in diameter were formed on carbon support with copper barely precipitated, while in the presence of 2-propanol or ethylene glycol or glucose both platinum and copper precipitated as few-nanometer-sized alloy particles together with copper oxides. It was suggested that the metal nuclei produced upon electron beam irradiation do not have enough lifetime without reduction enhancer due to fast oxidation of the nuclei by oxidizing radicals, while the reduction enhancer scavenges these oxidizing radicals preventing oxidation of metallic clusters and prolonging their lifetime. Ethylene glycol gave smaller and better alloyed particles with less copper oxides compared to 2-propanol since the carbonyl compounds derived from oxidation of ethylene glycol protect metallic clusters from oxidation further prolonging their lifetime. In the electrochemical measurements, the methanol oxidation activities of Pt-Cu/C catalysts were well explained by their structural characteristics.

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Bimetallic nanoparticles of PtM (M=Au, Cu, Ni) supported on iron oxide: Radiolytic synthesis and CO oxidation catalysis

Cited by 86 publications

References 19 publications

Chemical Preparation of Supported Bimetallic Catalysts. Gold-Based Bimetallic, a Case Study

Chemical Preparation of Supported Bimetallic Catalysts. Gold-Based Bimetallic, a Case Study

Bimetallic Ru-Re/γ-Al2O3 catalysts for the catalytic combustion of propane: Effect of the Re addition

Effect of reduction enhancer on a radiolytic synthesis of carbon-supported Pt–Cu nanoparticles and their structural and electrochemical properties

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