The structure-dependent enhancement of the oxygen reduction reaction performance of Co-based low Pt catalysts through Au addition

Zi Jun Lin; Tsung Fu Chou; Chen Wei Liu; Po Hsiang Huang; Yao Zhang Guo; Jeng Han Wang; Kuan Wen Wang

doi:10.1039/c6ta04154j

The structure-dependent enhancement of the oxygen reduction reaction performance of Co-based low Pt catalysts through Au addition

Zi Jun Lin, Tsung Fu Chou, Chen Wei Liu, Po Hsiang Huang, Yao Zhang Guo, Jeng Han Wang^*, Kuan Wen Wang

^*Corresponding author for this work

Department of Chemistry

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

15 Citations (Scopus)

Abstract

In this study, we have investigated the oxygen reduction reaction (ORR) activity and durability of Co-based catalysts mechanistically. CoPt/C catalysts with a Pt loading of 7 wt% and Au modification have been prepared and shown excellent ORR performance. The various as-prepared CoPt/C and CoPtAu/C catalysts have about 2.6-9.2 times higher mass activity than commercial Pt/C. The mechanistic insight obtained by density functional theory calculations has shown that the enhanced activity is attributable to the fact that Co-based catalysts can easily dissociate surface O₂∗ without the high-barrier protonation step and efficiently remove the dissociated O∗. The improved stability, 1000^th decay = 14.6%, corresponds to the fact that the core Au can resist the shrinkage of surface Pt during the accelerated durability test.

Original language	English
Pages (from-to)	11023-11029
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	4
Issue number	28
DOIs	https://doi.org/10.1039/c6ta04154j
Publication status	Published - 2016

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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10.1039/c6ta04154j

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title = "The structure-dependent enhancement of the oxygen reduction reaction performance of Co-based low Pt catalysts through Au addition",

abstract = "In this study, we have investigated the oxygen reduction reaction (ORR) activity and durability of Co-based catalysts mechanistically. CoPt/C catalysts with a Pt loading of 7 wt% and Au modification have been prepared and shown excellent ORR performance. The various as-prepared CoPt/C and CoPtAu/C catalysts have about 2.6-9.2 times higher mass activity than commercial Pt/C. The mechanistic insight obtained by density functional theory calculations has shown that the enhanced activity is attributable to the fact that Co-based catalysts can easily dissociate surface O2∗ without the high-barrier protonation step and efficiently remove the dissociated O∗. The improved stability, 1000th decay = 14.6%, corresponds to the fact that the core Au can resist the shrinkage of surface Pt during the accelerated durability test.",

author = "Lin, {Zi Jun} and Chou, {Tsung Fu} and Liu, {Chen Wei} and Huang, {Po Hsiang} and Guo, {Yao Zhang} and Wang, {Jeng Han} and Wang, {Kuan Wen}",

note = "Publisher Copyright: {\textcopyright} 2016 The Royal Society of Chemistry.",

year = "2016",

doi = "10.1039/c6ta04154j",

language = "English",

volume = "4",

pages = "11023--11029",

journal = "Journal of Materials Chemistry A",

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publisher = "Royal Society of Chemistry",

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T1 - The structure-dependent enhancement of the oxygen reduction reaction performance of Co-based low Pt catalysts through Au addition

AU - Lin, Zi Jun

AU - Chou, Tsung Fu

AU - Liu, Chen Wei

AU - Huang, Po Hsiang

AU - Guo, Yao Zhang

AU - Wang, Jeng Han

AU - Wang, Kuan Wen

PY - 2016

Y1 - 2016

N2 - In this study, we have investigated the oxygen reduction reaction (ORR) activity and durability of Co-based catalysts mechanistically. CoPt/C catalysts with a Pt loading of 7 wt% and Au modification have been prepared and shown excellent ORR performance. The various as-prepared CoPt/C and CoPtAu/C catalysts have about 2.6-9.2 times higher mass activity than commercial Pt/C. The mechanistic insight obtained by density functional theory calculations has shown that the enhanced activity is attributable to the fact that Co-based catalysts can easily dissociate surface O2∗ without the high-barrier protonation step and efficiently remove the dissociated O∗. The improved stability, 1000th decay = 14.6%, corresponds to the fact that the core Au can resist the shrinkage of surface Pt during the accelerated durability test.

AB - In this study, we have investigated the oxygen reduction reaction (ORR) activity and durability of Co-based catalysts mechanistically. CoPt/C catalysts with a Pt loading of 7 wt% and Au modification have been prepared and shown excellent ORR performance. The various as-prepared CoPt/C and CoPtAu/C catalysts have about 2.6-9.2 times higher mass activity than commercial Pt/C. The mechanistic insight obtained by density functional theory calculations has shown that the enhanced activity is attributable to the fact that Co-based catalysts can easily dissociate surface O2∗ without the high-barrier protonation step and efficiently remove the dissociated O∗. The improved stability, 1000th decay = 14.6%, corresponds to the fact that the core Au can resist the shrinkage of surface Pt during the accelerated durability test.

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The structure-dependent enhancement of the oxygen reduction reaction performance of Co-based low Pt catalysts through Au addition

Abstract

ASJC Scopus subject areas

UN SDGs

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