The Chemical Properties of Hydrogen Atoms Adsorbed on M0Nanoparticles Suspended inAqueous Solutions: The Case of Ag0-NPs and Au0-NPs Reduced by BD4

Alina Sermiagin; Dan Meyerstein; Ronen Bar-Ziv; Tomer Zidki

doi:10.1002/ANGE.201809302

The Chemical Properties of Hydrogen Atoms Adsorbed on M⁰Nanoparticles Suspended inAqueous Solutions: The Case of Ag⁰-NPs and Au⁰-NPs Reduced by BD₄

Alina Sermiagin, Dan Meyerstein, Ronen Bar-Ziv, Tomer Zidki

Department of Chemistry

Research output: Contribution to journal › Comment/debate

7 Scopus citations

Abstract

The nature of H-atoms adsorbed on M⁰-nanoparticles is of major importance in many catalyzed reduction processes.Using isotope labeling,wedetermined that hydrogen evolution from transient {(M⁰-NP)-H_n}ⁿ proceeds mainly via the Heyrovsky mechanism when nislarge (i.e., the hydrogens behave as hydrides) but mainly via the Tafel mechanism when nissmall (i.e., the hydrogens behave as atoms). Additionally, the relative contributions of the two mechanisms differ considerably for M = Au and Ag. The results are analogous to those recently reported for the M⁰-NP-catalyzed de-halogenation processes.

Original language	English
Pages (from-to)	16763-16766
Number of pages	4
Journal	Angewandte Chemie - International Edition
Volume	130
Issue number	50
DOIs	https://doi.org/10.1002/ANGE.201809302
State	Published - 10 Dec 2018

Keywords

hydrogen evolution
isotopic labeling
nanoparticles
reduction mechanism
sodium borohydride

ASJC Scopus subject areas

Catalysis
General Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/ANGE.201809302

Cite this

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title = "The Chemical Properties of Hydrogen Atoms Adsorbed on M0Nanoparticles Suspended inAqueous Solutions: The Case of Ag0-NPs and Au0-NPs Reduced by BD4",

abstract = "The nature of H-atoms adsorbed on M0-nanoparticles is of major importance in many catalyzed reduction processes.Using isotope labeling,wedetermined that hydrogen evolution from transient {(M0-NP)-Hn}n proceeds mainly via the Heyrovsky mechanism when nislarge (i.e., the hydrogens behave as hydrides) but mainly via the Tafel mechanism when nissmall (i.e., the hydrogens behave as atoms). Additionally, the relative contributions of the two mechanisms differ considerably for M = Au and Ag. The results are analogous to those recently reported for the M0-NP-catalyzed de-halogenation processes.",

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author = "Alina Sermiagin and Dan Meyerstein and Ronen Bar-Ziv and Tomer Zidki",

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AU - Meyerstein, Dan

AU - Bar-Ziv, Ronen

AU - Zidki, Tomer

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N2 - The nature of H-atoms adsorbed on M0-nanoparticles is of major importance in many catalyzed reduction processes.Using isotope labeling,wedetermined that hydrogen evolution from transient {(M0-NP)-Hn}n proceeds mainly via the Heyrovsky mechanism when nislarge (i.e., the hydrogens behave as hydrides) but mainly via the Tafel mechanism when nissmall (i.e., the hydrogens behave as atoms). Additionally, the relative contributions of the two mechanisms differ considerably for M = Au and Ag. The results are analogous to those recently reported for the M0-NP-catalyzed de-halogenation processes.

AB - The nature of H-atoms adsorbed on M0-nanoparticles is of major importance in many catalyzed reduction processes.Using isotope labeling,wedetermined that hydrogen evolution from transient {(M0-NP)-Hn}n proceeds mainly via the Heyrovsky mechanism when nislarge (i.e., the hydrogens behave as hydrides) but mainly via the Tafel mechanism when nissmall (i.e., the hydrogens behave as atoms). Additionally, the relative contributions of the two mechanisms differ considerably for M = Au and Ag. The results are analogous to those recently reported for the M0-NP-catalyzed de-halogenation processes.

KW - hydrogen evolution

KW - isotopic labeling

KW - nanoparticles

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KW - sodium borohydride

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