PtAu Nanoparticles Supported by Reduced Graphene Oxide as a Highly Active Catalyst for Hydrogen Evolution

Rakočević, Lazar; Simatović, Ivana Stojković; Maksić, Aleksandar; Rajić, Vladimir; Štrbac, Svetlana; Srejić, Irina

doi:10.3390/catal12010043

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PtAu Nanoparticles Supported by Reduced Graphene Oxide as a Highly Active Catalyst for Hydrogen Evolution

Lazar Rakočević

¹,

Ivana Stojković Simatović

²,

¹,

¹,

³ and

^1,*

INS Vinca, Department of Atomic Physics, University of Belgrade, Mike Petrovića Alasa 12–14, 11351 Belgrade, Serbia

Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12–16, 11158 Beograd, Serbia

Department of Electrochemistry, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia

Author to whom correspondence should be addressed.

Academic Editors: Vincenzo Baglio and Shuhui Sun

Catalysts 2022, 12(1), 43; https://doi.org/10.3390/catal12010043

Received: 16 November 2021 / Revised: 8 December 2021 / Accepted: 28 December 2021 / Published: 31 December 2021

(This article belongs to the Special Issue Advanced Nanomaterials for Electrocatalysis: Synthesis, Characterization and Application)

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Abstract

PtAu nanoparticles spontaneously deposited on graphene support, PtAu/rGO, have shown remarkably high catalytic activity for hydrogen evolution reaction (HER) in sulfuric acid solution. SEM images of the PtAu/rGO electrode surface showed that Pt nanoparticles that are non-uniform in size occupy both the edges of previously deposited uniform Au nanoparticles and the edges of graphene support. XPS analysis showed that the atomic percentages of Au and Pt in PtAu/rGO were 0.6% and 0.3%, respectively. The atomic percentage of Au alone on previously prepared Au/rGO was 0.7%. Outstanding HER activity was achieved for the PtAu/rGO electrode, showing the initial potential close to the equilibrium potential for HER and a low Tafel slope of −38 mV/dec. This was confirmed by electrochemical impedance spectroscopy. The chronoamperometric measurement performed for 40 min for hydrogen evolution at a constant potential indicated good stability and durability of the PtAu/rGO electrode. View Full-Text

Keywords: platinum; gold; PtAu nanoparticles; graphene; SEM; XPS; hydrogen evolution

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MDPI and ACS Style

Rakočević, L.; Simatović, I.S.; Maksić, A.; Rajić, V.; Štrbac, S.; Srejić, I. PtAu Nanoparticles Supported by Reduced Graphene Oxide as a Highly Active Catalyst for Hydrogen Evolution. Catalysts 2022, 12, 43. https://doi.org/10.3390/catal12010043

AMA Style

Rakočević L, Simatović IS, Maksić A, Rajić V, Štrbac S, Srejić I. PtAu Nanoparticles Supported by Reduced Graphene Oxide as a Highly Active Catalyst for Hydrogen Evolution. Catalysts. 2022; 12(1):43. https://doi.org/10.3390/catal12010043

Chicago/Turabian Style

Rakočević, Lazar, Ivana S. Simatović, Aleksandar Maksić, Vladimir Rajić, Svetlana Štrbac, and Irina Srejić. 2022. "PtAu Nanoparticles Supported by Reduced Graphene Oxide as a Highly Active Catalyst for Hydrogen Evolution" Catalysts 12, no. 1: 43. https://doi.org/10.3390/catal12010043

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PtAu Nanoparticles Supported by Reduced Graphene Oxide as a Highly Active Catalyst for Hydrogen Evolution

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