The oscillatory electro-oxidation of formic acid: insights on the adsorbates involved from time-resolved ATR-SEIRAS and UV reflectance experiments

Fabian W. Hartl; Hamilton Varela; Angel Cuesta

doi:10.1016/j.jelechem.2019.04.015

The oscillatory electro-oxidation of formic acid: insights on the adsorbates involved from time-resolved ATR-SEIRAS and UV reflectance experiments

Fabian W. Hartl, Hamilton Varela, Angel Cuesta^* (Corresponding Author)

^*Corresponding author for this work

Universidade de São Paulo

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

6 Citations (Scopus)

4 Downloads (Pure)

Abstract

Galvanostatic potential oscillations during the oxidation of formic acid were studied by time-resolved Surface-Enhanced Infrared Absorption Spectroscopy in the attenuated total reflection configuration (ATR-SEIRAS) and reflectance measurements in the ultraviolet (UV) region. ATR-SEIRAS allowed monitoring oscillations in the coverage of adsorbed CO (COad) and adsorbed bridge-bonded formate (HCOObi), while UV reflectance revealed oscillations in the coverage by specifically adsorbed anions (namely, adsorbed sulfate). The potential oscillations and the coverage of all these species are strongly interconnected, and an analysis of their correlation provides detailed insight into the autocatalytic loop responsible for the emergence of non-linear dynamics.

Original language	English
Pages (from-to)	249-254
Number of pages	6
Journal	Journal of Electroanalytical Chemistry
Volume	840
Early online date	4 Apr 2019
DOIs	https://doi.org/10.1016/j.jelechem.2019.04.015
Publication status	Published - 1 May 2019

Bibliographical note

The support of the University of Aberdeen is gratefully acknowledged. F.W.H. and H.V. acknowledge São Paulo Research Foundation (FAPESP) for the scholarship (grant #2014/08030-9, grant #2017/07286-8) and financial support (grant #2013/16930-7). HV (grant #306151/2010-3) acknowledges Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for financial support. This study was also supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.

Keywords

formic acid oxidation
platinum
potential oscillations
pH effect
ATR-SEIRAS
differential reflectance spectroscopy

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Accepted Manuscript
© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 1.07 MBLicence: CC BY-NC-ND

Cite this

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title = "The oscillatory electro-oxidation of formic acid: insights on the adsorbates involved from time-resolved ATR-SEIRAS and UV reflectance experiments",

abstract = "Galvanostatic potential oscillations during the oxidation of formic acid were studied by time-resolved Surface-Enhanced Infrared Absorption Spectroscopy in the attenuated total reflection configuration (ATR-SEIRAS) and reflectance measurements in the ultraviolet (UV) region. ATR-SEIRAS allowed monitoring oscillations in the coverage of adsorbed CO (COad) and adsorbed bridge-bonded formate (HCOObi), while UV reflectance revealed oscillations in the coverage by specifically adsorbed anions (namely, adsorbed sulfate). The potential oscillations and the coverage of all these species are strongly interconnected, and an analysis of their correlation provides detailed insight into the autocatalytic loop responsible for the emergence of non-linear dynamics.",

keywords = "formic acid oxidation, platinum, potential oscillations, pH effect, ATR-SEIRAS, differential reflectance spectroscopy",

author = "Hartl, {Fabian W.} and Hamilton Varela and Angel Cuesta",

note = "The support of the University of Aberdeen is gratefully acknowledged. F.W.H. and H.V. acknowledge S{\~a}o Paulo Research Foundation (FAPESP) for the scholarship (grant #2014/08030-9, grant #2017/07286-8) and financial support (grant #2013/16930-7). HV (grant #306151/2010-3) acknowledges Conselho Nacional de Desenvolvimento Cient{\'i}fico e Tecnol{\'o}gico (CNPq) for financial support. This study was also supported by the Coordena{\c c}{\~a}o de Aperfei{\c c}oamento de Pessoal de N{\'i}vel Superior - Brasil (CAPES) - Finance Code 001.",

year = "2019",

month = may,

day = "1",

doi = "10.1016/j.jelechem.2019.04.015",

language = "English",

volume = "840",

pages = "249--254",

journal = "Journal of Electroanalytical Chemistry",

issn = "1572-6657",

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T1 - The oscillatory electro-oxidation of formic acid

T2 - insights on the adsorbates involved from time-resolved ATR-SEIRAS and UV reflectance experiments

AU - Hartl, Fabian W.

AU - Varela, Hamilton

AU - Cuesta, Angel

N1 - The support of the University of Aberdeen is gratefully acknowledged. F.W.H. and H.V. acknowledge São Paulo Research Foundation (FAPESP) for the scholarship (grant #2014/08030-9, grant #2017/07286-8) and financial support (grant #2013/16930-7). HV (grant #306151/2010-3) acknowledges Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for financial support. This study was also supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - Galvanostatic potential oscillations during the oxidation of formic acid were studied by time-resolved Surface-Enhanced Infrared Absorption Spectroscopy in the attenuated total reflection configuration (ATR-SEIRAS) and reflectance measurements in the ultraviolet (UV) region. ATR-SEIRAS allowed monitoring oscillations in the coverage of adsorbed CO (COad) and adsorbed bridge-bonded formate (HCOObi), while UV reflectance revealed oscillations in the coverage by specifically adsorbed anions (namely, adsorbed sulfate). The potential oscillations and the coverage of all these species are strongly interconnected, and an analysis of their correlation provides detailed insight into the autocatalytic loop responsible for the emergence of non-linear dynamics.

AB - Galvanostatic potential oscillations during the oxidation of formic acid were studied by time-resolved Surface-Enhanced Infrared Absorption Spectroscopy in the attenuated total reflection configuration (ATR-SEIRAS) and reflectance measurements in the ultraviolet (UV) region. ATR-SEIRAS allowed monitoring oscillations in the coverage of adsorbed CO (COad) and adsorbed bridge-bonded formate (HCOObi), while UV reflectance revealed oscillations in the coverage by specifically adsorbed anions (namely, adsorbed sulfate). The potential oscillations and the coverage of all these species are strongly interconnected, and an analysis of their correlation provides detailed insight into the autocatalytic loop responsible for the emergence of non-linear dynamics.

KW - formic acid oxidation

KW - platinum

KW - potential oscillations

KW - pH effect

KW - ATR-SEIRAS

KW - differential reflectance spectroscopy

U2 - 10.1016/j.jelechem.2019.04.015

DO - 10.1016/j.jelechem.2019.04.015

M3 - Article

SN - 1572-6657

VL - 840

SP - 249

EP - 254

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

ER -

The oscillatory electro-oxidation of formic acid: insights on the adsorbates involved from time-resolved ATR-SEIRAS and UV reflectance experiments

Abstract

Bibliographical note

Keywords

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