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Hydrogen Evolution Reaction on Platinum Catalyzed by Palladium and Rhodium Nanoislands

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2014
Authors
Smiljanić, Milutin
Rakočević, Zlatko Lj.
Maksic, A.
Štrbac, Svetlana
Article (Published version)
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Abstract
Pd/Pt(poly) and Rh/Pt(poly) bimetallic electrodes prepared by spontaneous deposition of Pd and Rh nanoislands on Pt(poly) at submonolayer coverage were explored as catalysts for hydrogen evolution reaction (HER) in alkaline media. Characterization of bimetallic surfaces was performed ex situ by height and phase AFM imaging and in situ by cyclic voltammetry. HER was investigated by linear sweep voltammetry in 0.1 M NaOH. Both Pd/Pt(poly) and Rh/Pt(poly) surfaces exhibited an enhanced catalysis for HER with respect to bare Pt(poly), which is explained by a strong synergistic electronic effect of platinum substrate on the deposited Pd or Rh nanoislands. This electronic effect leads to the lowering of a binding energy of adsorbed hydrogen intermediate and consequently to the lowering of the overpotential for HER.
Keywords:
Platinum / Palladium / Rhodium / AFM / Hydrogen evolution
Source:
Electrochimica Acta, 2014, 117, 336-343
Publisher:
  • Pergamon-Elsevier Science Ltd, Oxford
Projects:
  • Functional, Functionalized and Advanced Nanomaterials (RS-45005)

DOI: 10.1016/j.electacta.2013.11.142

ISSN: 0013-4686

WoS: 000332812300045

Scopus: 2-s2.0-84891606338
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46
URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1548
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