The Chemical Properties of Hydrogen Atoms Adsorbed on M 0 ‐Nanoparticles Suspended in Aqueous Solutions: The Case of Ag 0 ‐NPs and Au 0 ‐NPs Reduced by BD 4  − | Zendy

Sermiagin Alina | Zendy; Meyerstein Dan | Zendy; BarZiv Ronen | Zendy; Zidki Tomer | Zendy

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The Chemical Properties of Hydrogen Atoms Adsorbed on M 0 ‐Nanoparticles Suspended in Aqueous Solutions: The Case of Ag 0 ‐NPs and Au 0 ‐NPs Reduced by BD 4 −

Author(s) -

Sermiagin Alina,

Meyerstein Dan,

BarZiv Ronen,

Zidki Tomer

Publication year - 2018

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.201809302

Subject(s) - adsorption , chemistry , aqueous solution , nanoparticle , hydrogen , catalysis , kinetic isotope effect , halogenation , tafel equation , inorganic chemistry , crystallography , materials science , deuterium , nanotechnology , electrochemistry , organic chemistry , physics , atomic physics , electrode

The nature of H‐atoms adsorbed on M 0 ‐nanoparticles is of major importance in many catalyzed reduction processes. Using isotope labeling, we determined that hydrogen evolution from transient {(M 0 ‐NP)‐H n } n − proceeds mainly via the Heyrovsky mechanism when n is large (i.e., the hydrogens behave as hydrides) but mainly via the Tafel mechanism when n is small (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 M 0 ‐NP‐catalyzed de‐halogenation processes.

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