Abstract
Supported bimetallic nanoparticles (SBN) are extensively used as efficient redox catalysts. This kind of catalysis particularly using SBN has attracted immense research interest compared to their parent metals due to their unique physico-chemical properties. The primary objective of this contribution is to provide comprehensive overview about SBN and their application as promising catalysts. The present review contains four sections in total. Section 1 starts with a general introduction, recent progress, and brief summary of the application of SBN as promising catalysts for different applications. Section 2 reviews the preparation and characterization methods of SBN for a wide range of catalytic reactions. Section 3 concentrates on our own results related to the application of SBN in heterogeneous catalysis. In this section, the oxidation of cyclohexane to adipic acid (an eco-friendly and novel approach) will be discussed. In addition, the application of bimetallic Pd catalysts for vapor phase toluene acetoxylation in a fixed bed reactor will also be highlighted. Acetoxylation of toluene to benzyl acetate is another green route to synthesize benzyl acetate in one step. Finally, Section 4 describes the summary of the main points and also presents an outlook on the application of SBN as promising catalysts for the production of valuable products.
Highlights
Supported bimetallic nanoparticles (SBN) catalysts are an important class of heterogeneous catalysts due to their remarkable catalytic properties that are different compared to the individual by coke or due to marginal loss of catalyst weight during the work-up process of recovery of the catalyst [84]
Supported bimetallic nanoparticles (SBN) catalysts are an important class of heterogeneous catalysts due to their remarkable catalytic properties that are different compared to the individual metal components
This review briefly presented the most important methods used to synthesis SBN, and what has become clear is that the applicability of each method is largely dependent on the purpose to which it is to be put
Summary
Recent advances made in catalyst technology are attempting to meet these challenges by means of applying a wide range of possibilities, e.g., employing more sustainable feedstocks, application of more efficient catalysts having two or more components (e.g., metals/metal oxides) to generate bifunctional and multi-functional properties etc. Metal particles composed of two different metal components exhibit different catalytic properties to monometallic catalysts. Such bimetallic catalysts reveal the combination of the properties related to the presence of two individual metals, and generate new and distinctive properties due to synergetic effects between the two metals present. The structure of the bimetallic particles can be oriented in random, for instance alloy or intermetallic compound, cluster-in-cluster or core-shell structures etc
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