Reaction of H2 with polyoxometalate supported Rhodium(0) and Iridium(0) nanoparticles in aqueous suspensions: a kinetic study. (29th June 2022)

• Record Type: Journal Article
• Authors: Vijay, Aswin Kottapurath; Meyerstein, Dan; Marks, Vered; Albo, Yael
• Is Part Of: New journal of chemistry. Volume 46:Number 28(2022)
• Page Start: 13643
• Page End: 13650
• Publication Date: 2022-06-29
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj02253b
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The mechanism of the reaction between Rh 0 and Ir 0 NPs with H2 was measured in the absence of an electrical bias via monitoring the catalytic reduction of PW12 O40 3− and it was compared to the previous results of Pt 0 NPs. Abstract : The kinetics of the reactions of H2 with rhodium and iridium nanoparticles (NPs), in aqueous suspensions, were studied by following their catalytic reduction of PW12 O40 3−, POM. The reaction of H2 with the same size (∼2.5 nm) of two different nanoparticles was carried out to check how the nature of the nanoparticles affects the reaction kinetics. Herein we report the first kinetic measurement of H2 + Rh 0 and Ir 0 NPs in the absence of an electric field. A comparison of the apparent rate constants of the reactions Rh 0 -NPs and Ir 0 -NPs + H2 to the previously reported Pt 0 -NPs + H2 indicates that the rates decrease along the series k (Pt) > k (Rh) > k (Ir), though they are of the same order of magnitude. The adsorption of hydrogen and/or H atom can affect the structure of the M 0 -NPs.