Superior catalytic performance of intermetallic CaPt<sub>2</sub>nanoparticles supported on titanium group oxides in hydrogenation of ketones to alcohols

Kobayashi, Yasukazu; Tada, Shohei; Kondo, Masaru; Fujiwara, Kakeru; Mizoguchi, Hiroshi

doi:10.1039/d1cc07135a

Cited by 2 publications

(2 citation statements)

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“…For example, for Pd 3 Zr, the surface Zr no longer retains its metallic state, even in the presence of parts per billion levels of oxygen . In this context, it is generally difficult to use alloys containing alkali or alkaline-earth − metals as catalysts while retaining their surfaces in their original metallic state.…”

Section: Classificationmentioning

confidence: 99%

Catalysis of Alloys: Classification, Principles, and Design for a Variety of Materials and Reactions

2022

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Alloying has long been used as a promising methodology to improve the catalytic performance of metallic materials. In recent years, the field of alloy catalysis has made remarkable progress with the emergence of a variety of novel alloy materials and their functions. Therefore, a comprehensive disciplinary framework for catalytic chemistry of alloys that provides a cross-sectional understanding of the broad research field is in high demand. In this review, we provide a comprehensive classification of various alloy materials based on metallurgy, thermodynamics, and inorganic chemistry and summarize the roles of alloying in catalysis and its principles with a brief introduction of the historical background of this research field. Furthermore, we explain how each type of alloy can be used as a catalyst material and how to design a functional catalyst for the target reaction by introducing representative case studies. This review includes two approaches, namely, from materials and reactions, to provide a better understanding of the catalytic chemistry of alloys. Our review offers a perspective on this research field and can be used encyclopedically according to the readers' individual interests. CONTENTS

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Section: Classificationmentioning

confidence: 99%

Catalysis of Alloys: Classification, Principles, and Design for a Variety of Materials and Reactions

2022

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“…Molten salt synthesis is a good technique to obtain active catalysts [9][10][11][12]. Previously, we prepared some nanosized intermetallic compounds using the CaH 2 -assisted molten salt synthesis [13] and exhibited that some are available as good catalyst supports, such as Ti 6 Si 7 Ni 16 [14], and some are active species, such as TiNi [15], YIr 2 [16], CaPt 2 [17]. In a reduction condition with a CaH 2 reducing agent in a molten LiCl-KCl at 360 • C, ZnO was totally reduced to metallic zinc to alloy with metallic Ni, following a formation of intermetallic compound NiZn [18].…”

Section: Introductionmentioning

confidence: 99%

CaH2-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn13 and Pt3Zn10 for Catalytic Selective Hydrogenation Application

Kobayashi,

Yamamoto,

Shoji

2024

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Zinc-included intermetallic compound catalysts of RhZn, PtZn, and PdZn with a molar ration of Zn/metal = 1/1, which are generally prepared using a hydrogen reduction approach, are known to show excellent catalytic performance in some selective hydrogenations of organic compounds. In this study, in order to reduce the incorporated mounts of the expensive noble metals, we attempted to prepare zinc-rich intermetallic compounds via a CaH2-assisted molten salt synthesis method with a stronger reduction capacity than the common hydrogen reduction method. X-ray diffraction results indicated the formation of RhZn13 and Pt3Zn10 in the samples prepared by the reduction of ZnO-supported metal precursors. In a hydrogenation reaction of p-nitrophenol to p-aminophenol, the ZnO-supported RhZn13 and Pt3Zn10 catalysts showed a higher selectivity than the RhZn/ZnO and PtZn/ZnO catalysts with the almost similar conversions. Thus, it was demonstrated that the zinc-rich intermetallic compounds of RhZn13 and Pt3Zn10 could be superior selective hydrogenation catalysts compared to the conventional intermetallic compound catalysts of RhZn and PtZn.

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Superior catalytic performance of intermetallic CaPt₂nanoparticles supported on titanium group oxides in hydrogenation of ketones to alcohols

Abstract: Novel molten salt synthesis of a highly active intermetallic CaPt2 catalyst supported on titanium oxide for hydrogenation of cyclohexanone to cyclohexanol.

Cited by 2 publications

References 31 publications

Catalysis of Alloys: Classification, Principles, and Design for a Variety of Materials and Reactions

Catalysis of Alloys: Classification, Principles, and Design for a Variety of Materials and Reactions

CaH2-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn13 and Pt3Zn10 for Catalytic Selective Hydrogenation Application

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Superior catalytic performance of intermetallic CaPt2nanoparticles supported on titanium group oxides in hydrogenation of ketones to alcohols

Abstract: Novel molten salt synthesis of a highly active intermetallic CaPt2 catalyst supported on titanium oxide for hydrogenation of cyclohexanone to cyclohexanol.

Cited by 2 publications

References 31 publications

Catalysis of Alloys: Classification, Principles, and Design for a Variety of Materials and Reactions

Catalysis of Alloys: Classification, Principles, and Design for a Variety of Materials and Reactions

CaH2-Assisted Molten Salt Synthesis of Zinc-Rich Intermetallic Compounds of RhZn13 and Pt3Zn10 for Catalytic Selective Hydrogenation Application

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Superior catalytic performance of intermetallic CaPt₂nanoparticles supported on titanium group oxides in hydrogenation of ketones to alcohols