Pt4+as an Active Site for Oxygen Evolution Reaction in La1- xSr xCo1- yPt yO3

Anuj Bisht; Pradeep Kumar Yadav; Shikha Dhakar; Sudhanshu Sharma

doi:10.1021/acs.jpcc.1c06426

Pt⁴⁺as an Active Site for Oxygen Evolution Reaction in La_{1- x}Sr _xCo_{1- y}Pt _yO₃

Anuj Bisht, Pradeep Kumar Yadav, Shikha Dhakar, Sudhanshu Sharma

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

11 Scopus citations

Abstract

This study presents an investigation on the role of Pt4+ in Pt-doped La1-xSrxCoO3 (LSPtCO) perovskite for oxygen evolution reaction (OER) activity. LSPtCO with Pt in the +4 oxidation state shows the highest activity for OER in comparison to undoped La1-xSrxCoO3 (LSCO) and Pt metal-supported LSCO (Pt is in the zero oxidation state). These results indicate that a high oxidation state of Pt is favorable for the OER activity. Pt4+ is also shown as the active center for the OER reaction as its reductive treatment decreases the OER activity significantly. Thus, the formation of high-valent Pt is a key factor in fabricating an active OER catalyst. While Pt metal may not be a good catalyst for OER, Pt4+ is significantly superior, especially in LSCO.

Original language	English
Pages (from-to)	25488-25496
Number of pages	9
Journal	Journal of Physical Chemistry C
Volume	125
Issue number	46
DOIs	https://doi.org/10.1021/acs.jpcc.1c06426
State	Published - Nov 25 2021
Externally published	Yes

Funding

S.S. gratefully acknowledges financial support from MHRD sponsored research project (STARS/APR2019/CS/215/FS). P.K.Y. and S.D. are thankful to IIT Gandhinagar for their fellowship. The authors are obliged to the Central Instrumentation Facility, IIT Gandhinagar, for XRD and TEM analyses.

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10.1021/acs.jpcc.1c06426

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title = "Pt4+as an Active Site for Oxygen Evolution Reaction in La1- xSr xCo1- yPt yO3",

abstract = "This study presents an investigation on the role of Pt4+ in Pt-doped La1-xSrxCoO3 (LSPtCO) perovskite for oxygen evolution reaction (OER) activity. LSPtCO with Pt in the +4 oxidation state shows the highest activity for OER in comparison to undoped La1-xSrxCoO3 (LSCO) and Pt metal-supported LSCO (Pt is in the zero oxidation state). These results indicate that a high oxidation state of Pt is favorable for the OER activity. Pt4+ is also shown as the active center for the OER reaction as its reductive treatment decreases the OER activity significantly. Thus, the formation of high-valent Pt is a key factor in fabricating an active OER catalyst. While Pt metal may not be a good catalyst for OER, Pt4+ is significantly superior, especially in LSCO.",

author = "Anuj Bisht and Yadav, {Pradeep Kumar} and Shikha Dhakar and Sudhanshu Sharma",

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AU - Bisht, Anuj

AU - Yadav, Pradeep Kumar

AU - Dhakar, Shikha

AU - Sharma, Sudhanshu

PY - 2021/11/25

Y1 - 2021/11/25

N2 - This study presents an investigation on the role of Pt4+ in Pt-doped La1-xSrxCoO3 (LSPtCO) perovskite for oxygen evolution reaction (OER) activity. LSPtCO with Pt in the +4 oxidation state shows the highest activity for OER in comparison to undoped La1-xSrxCoO3 (LSCO) and Pt metal-supported LSCO (Pt is in the zero oxidation state). These results indicate that a high oxidation state of Pt is favorable for the OER activity. Pt4+ is also shown as the active center for the OER reaction as its reductive treatment decreases the OER activity significantly. Thus, the formation of high-valent Pt is a key factor in fabricating an active OER catalyst. While Pt metal may not be a good catalyst for OER, Pt4+ is significantly superior, especially in LSCO.

AB - This study presents an investigation on the role of Pt4+ in Pt-doped La1-xSrxCoO3 (LSPtCO) perovskite for oxygen evolution reaction (OER) activity. LSPtCO with Pt in the +4 oxidation state shows the highest activity for OER in comparison to undoped La1-xSrxCoO3 (LSCO) and Pt metal-supported LSCO (Pt is in the zero oxidation state). These results indicate that a high oxidation state of Pt is favorable for the OER activity. Pt4+ is also shown as the active center for the OER reaction as its reductive treatment decreases the OER activity significantly. Thus, the formation of high-valent Pt is a key factor in fabricating an active OER catalyst. While Pt metal may not be a good catalyst for OER, Pt4+ is significantly superior, especially in LSCO.

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ER -

Pt⁴⁺as an Active Site for Oxygen Evolution Reaction in La_{1- x}Sr _xCo_{1- y}Pt _yO₃

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