La0.80Sr0.20CoO3 as a noble-metal-free catalyst for the direct oxidation of formic acid under zero applied potential

Anuj Bisht; Phanikumar Pentyala; Parag A. Deshpande; Sudhanshu Sharma

doi:10.1016/j.elecom.2018.12.010

La_0.80Sr_0.20CoO₃ as a noble-metal-free catalyst for the direct oxidation of formic acid under zero applied potential

Anuj Bisht
, Phanikumar Pentyala
, Parag A. Deshpande
, Sudhanshu Sharma

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

10 Scopus citations

Abstract

Direct oxidation of formic acid to CO₂ using noble-metal-free La_0.80Sr_0.20CoO₃ is demonstrated in this study. The catalyst was able to oxidize HCOOH without any externally applied potential. The activity of La_0.80Sr_0.20CoO₃ is compared with that of Pt nanoparticles. It is observed that the amount of CO₂ generated using La_0.80Sr_0.20CoO₃ is five times higher than that generated with Pt nanoparticles. The experimental observations are supported by DFT calculations, which reveal the role of the lattice oxygen in La_0.80Sr_0.20CoO₃ in the catalytic effect. The Sr ions were not found to have any appreciable role in the dissociation step. Weak binding of CO₂ involving energy changes of the order of −1 kcal/mol indicated the ease of CO₂ desorption from the catalyst surface, thus making the catalyst highly active for electrochemical HCOOH oxidation.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Electrochemistry Communications
Volume	99
DOIs	https://doi.org/10.1016/j.elecom.2018.12.010
State	Published - Feb 2019
Externally published	Yes

Funding

We gratefully acknowledge the support of IIT Gandhinagar and DST-SERB ( EMR/2016/000806 ). A.B. is thankful to IIT Gandhinagar for fellowship.

Keywords

DFT
Electro-oxidation
Formic acid
Lattice oxygen
Perovskite

Access to Document

10.1016/j.elecom.2018.12.010

Cite this

@article{3d55a0ee42b247fc8cccd061f10d6c4d,

title = "La0.80Sr0.20CoO3 as a noble-metal-free catalyst for the direct oxidation of formic acid under zero applied potential",

abstract = "Direct oxidation of formic acid to CO2 using noble-metal-free La0.80Sr0.20CoO3 is demonstrated in this study. The catalyst was able to oxidize HCOOH without any externally applied potential. The activity of La0.80Sr0.20CoO3 is compared with that of Pt nanoparticles. It is observed that the amount of CO2 generated using La0.80Sr0.20CoO3 is five times higher than that generated with Pt nanoparticles. The experimental observations are supported by DFT calculations, which reveal the role of the lattice oxygen in La0.80Sr0.20CoO3 in the catalytic effect. The Sr ions were not found to have any appreciable role in the dissociation step. Weak binding of CO2 involving energy changes of the order of −1 kcal/mol indicated the ease of CO2 desorption from the catalyst surface, thus making the catalyst highly active for electrochemical HCOOH oxidation.",

keywords = "DFT, Electro-oxidation, Formic acid, Lattice oxygen, Perovskite",

author = "Anuj Bisht and Phanikumar Pentyala and Deshpande, \{Parag A.\} and Sudhanshu Sharma",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2019",

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doi = "10.1016/j.elecom.2018.12.010",

language = "English",

volume = "99",

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TY - JOUR

T1 - La0.80Sr0.20CoO3 as a noble-metal-free catalyst for the direct oxidation of formic acid under zero applied potential

AU - Bisht, Anuj

AU - Pentyala, Phanikumar

AU - Deshpande, Parag A.

AU - Sharma, Sudhanshu

PY - 2019/2

Y1 - 2019/2

N2 - Direct oxidation of formic acid to CO2 using noble-metal-free La0.80Sr0.20CoO3 is demonstrated in this study. The catalyst was able to oxidize HCOOH without any externally applied potential. The activity of La0.80Sr0.20CoO3 is compared with that of Pt nanoparticles. It is observed that the amount of CO2 generated using La0.80Sr0.20CoO3 is five times higher than that generated with Pt nanoparticles. The experimental observations are supported by DFT calculations, which reveal the role of the lattice oxygen in La0.80Sr0.20CoO3 in the catalytic effect. The Sr ions were not found to have any appreciable role in the dissociation step. Weak binding of CO2 involving energy changes of the order of −1 kcal/mol indicated the ease of CO2 desorption from the catalyst surface, thus making the catalyst highly active for electrochemical HCOOH oxidation.

AB - Direct oxidation of formic acid to CO2 using noble-metal-free La0.80Sr0.20CoO3 is demonstrated in this study. The catalyst was able to oxidize HCOOH without any externally applied potential. The activity of La0.80Sr0.20CoO3 is compared with that of Pt nanoparticles. It is observed that the amount of CO2 generated using La0.80Sr0.20CoO3 is five times higher than that generated with Pt nanoparticles. The experimental observations are supported by DFT calculations, which reveal the role of the lattice oxygen in La0.80Sr0.20CoO3 in the catalytic effect. The Sr ions were not found to have any appreciable role in the dissociation step. Weak binding of CO2 involving energy changes of the order of −1 kcal/mol indicated the ease of CO2 desorption from the catalyst surface, thus making the catalyst highly active for electrochemical HCOOH oxidation.

KW - DFT

KW - Electro-oxidation

KW - Formic acid

KW - Lattice oxygen

KW - Perovskite

UR - https://www.scopus.com/pages/publications/85058691318

U2 - 10.1016/j.elecom.2018.12.010

DO - 10.1016/j.elecom.2018.12.010

M3 - Article

AN - SCOPUS:85058691318

SN - 1388-2481

VL - 99

SP - 1

EP - 4

JO - Electrochemistry Communications

JF - Electrochemistry Communications

ER -