Probing electronic and atomic ensembles effects on PtAu3 nanoparticles with CO adsorption and electrooxidation

Gema Cabello; Rogerio A. Davoglio; José F. Marco; Angel Cuesta

doi:10.1016/j.jelechem.2020.114233

Probing electronic and atomic ensembles effects on PtAu3 nanoparticles with CO adsorption and electrooxidation

Gema Cabello^*, Rogerio A. Davoglio, José F. Marco, Angel Cuesta

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

We have studied the adsorption and electrooxidation of CO on PtAu3 nanoalloys, aiming at providing further insight about the correlation between atomic structure and catalytic properties. The multiplicity of adsorption sites with different geometry and composition on the nanoparticles surface is demonstrated by a combination of electrochemical and infrared experiments. Specifically, the occurrence of low- and high-coordinated Pt atoms was confirmed by the splitting of the linearly-bonded CO band after removing CO from the electrolyte. Despite the low activity for the electrooxidation of COad of our PtAu3 nanoparticles, the combination of small Pt(111) terraces and small Pt atomic ensembles on their surfaces revealed by our experiments is connected with the negligible CO poisoning and the resulting high catalytic activity of our PtAu3 NPs for the formic acid oxidation reaction [Electrochim. Acta 2017, 224, 56–63].

Original language	English
Article number	114233
Journal	Journal of Electroanalytical Chemistry
Volume	870
Early online date	19 May 2020
DOIs	https://doi.org/10.1016/j.jelechem.2020.114233
Publication status	Published - 1 Aug 2020

Bibliographical note

Acknowledgements
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) is gratefully acknowledged for financial support (grant #3039/2010).

Keywords

CO electrooxidation
PtAu nanoparticles
Electronic effects
Atomic ensembles
ATR-SEIRAS
METHANOL
STRIPPING VOLTAMMOGRAMS
COVERAGE
CHARGE DISPLACEMENT
POTENTIAL DEPENDENCE
CARBON-MONOXIDE
SITU INFRARED-SPECTROSCOPY
PT(111) ELECTRODES
ELECTROCATALYSIS
CYCLIC VOLTAMMETRY

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title = "Probing electronic and atomic ensembles effects on PtAu3 nanoparticles with CO adsorption and electrooxidation",

abstract = "We have studied the adsorption and electrooxidation of CO on PtAu3 nanoalloys, aiming at providing further insight about the correlation between atomic structure and catalytic properties. The multiplicity of adsorption sites with different geometry and composition on the nanoparticles surface is demonstrated by a combination of electrochemical and infrared experiments. Specifically, the occurrence of low- and high-coordinated Pt atoms was confirmed by the splitting of the linearly-bonded CO band after removing CO from the electrolyte. Despite the low activity for the electrooxidation of COad of our PtAu3 nanoparticles, the combination of small Pt(111) terraces and small Pt atomic ensembles on their surfaces revealed by our experiments is connected with the negligible CO poisoning and the resulting high catalytic activity of our PtAu3 NPs for the formic acid oxidation reaction [Electrochim. Acta 2017, 224, 56–63].",

keywords = "CO electrooxidation, PtAu nanoparticles, Electronic effects, Atomic ensembles, ATR-SEIRAS, METHANOL, STRIPPING VOLTAMMOGRAMS, COVERAGE, CHARGE DISPLACEMENT, POTENTIAL DEPENDENCE, CARBON-MONOXIDE, SITU INFRARED-SPECTROSCOPY, PT(111) ELECTRODES, ELECTROCATALYSIS, CYCLIC VOLTAMMETRY",

author = "Gema Cabello and Davoglio, {Rogerio A.} and Marco, {Jos{\'e} F.} and Angel Cuesta",

note = "Acknowledgements Coordena{\c c}{\~a}o de Aperfei{\c c}oamento de Pessoal de N{\'i}vel Superior (CAPES) is gratefully acknowledged for financial support (grant #3039/2010).",

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doi = "10.1016/j.jelechem.2020.114233",

language = "English",

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AU - Cabello, Gema

AU - Davoglio, Rogerio A.

AU - Marco, José F.

AU - Cuesta, Angel

N1 - Acknowledgements Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) is gratefully acknowledged for financial support (grant #3039/2010).

PY - 2020/8/1

Y1 - 2020/8/1

N2 - We have studied the adsorption and electrooxidation of CO on PtAu3 nanoalloys, aiming at providing further insight about the correlation between atomic structure and catalytic properties. The multiplicity of adsorption sites with different geometry and composition on the nanoparticles surface is demonstrated by a combination of electrochemical and infrared experiments. Specifically, the occurrence of low- and high-coordinated Pt atoms was confirmed by the splitting of the linearly-bonded CO band after removing CO from the electrolyte. Despite the low activity for the electrooxidation of COad of our PtAu3 nanoparticles, the combination of small Pt(111) terraces and small Pt atomic ensembles on their surfaces revealed by our experiments is connected with the negligible CO poisoning and the resulting high catalytic activity of our PtAu3 NPs for the formic acid oxidation reaction [Electrochim. Acta 2017, 224, 56–63].

AB - We have studied the adsorption and electrooxidation of CO on PtAu3 nanoalloys, aiming at providing further insight about the correlation between atomic structure and catalytic properties. The multiplicity of adsorption sites with different geometry and composition on the nanoparticles surface is demonstrated by a combination of electrochemical and infrared experiments. Specifically, the occurrence of low- and high-coordinated Pt atoms was confirmed by the splitting of the linearly-bonded CO band after removing CO from the electrolyte. Despite the low activity for the electrooxidation of COad of our PtAu3 nanoparticles, the combination of small Pt(111) terraces and small Pt atomic ensembles on their surfaces revealed by our experiments is connected with the negligible CO poisoning and the resulting high catalytic activity of our PtAu3 NPs for the formic acid oxidation reaction [Electrochim. Acta 2017, 224, 56–63].

KW - CO electrooxidation

KW - PtAu nanoparticles

KW - Electronic effects

KW - Atomic ensembles

KW - ATR-SEIRAS

KW - METHANOL

KW - STRIPPING VOLTAMMOGRAMS

KW - COVERAGE

KW - CHARGE DISPLACEMENT

KW - POTENTIAL DEPENDENCE

KW - CARBON-MONOXIDE

KW - SITU INFRARED-SPECTROSCOPY

KW - PT(111) ELECTRODES

KW - ELECTROCATALYSIS

KW - CYCLIC VOLTAMMETRY

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DO - 10.1016/j.jelechem.2020.114233

M3 - Article

SN - 1572-6657

VL - 870

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

M1 - 114233

ER -

Probing electronic and atomic ensembles effects on PtAu3 nanoparticles with CO adsorption and electrooxidation

Abstract

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Keywords

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