Enhanced activity of Pt-based electrocatalysts for oxygen reduction via a selective Pt deposition process

Tae Yeol Jeon; Nicola Pinna; Sung Jong Yoo; Seung Ho Yu; Sang Kyung Kim; Seongyop Lim; Donghyun Peck; Doo Hwan Jung; Yung Eun Sung

doi:10.1016/j.jelechem.2011.03.023

Enhanced activity of Pt-based electrocatalysts for oxygen reduction via a selective Pt deposition process

Tae Yeol Jeon, Nicola Pinna, Sung Jong Yoo, Seung Ho Yu, Sang Kyung Kim, Seongyop Lim, Donghyun Peck, Doo Hwan Jung, Yung Eun Sung

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

21 Citations (Scopus)

Abstract

Carbon-supported Pt nanoparticles with various loading of Pt are prepared by a novel seed-mediated growth method using hydroquinone (HQ) assisted selective deposition. The structural and morphological dependence of the Pt nanoparticles on the catalytic activity in oxygen reduction reaction (ORR) is investigated. The analysis of core-level X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) cannot elucidate the origin of the large enhancement of the ORR activity. In contrast, electrochemical measurements of the CO-displacement charge and the concomitant CO adlayer oxidation behavior prove that the selective deposition of additional Pt contributed to the decrease of surface defects and to the increase of the onset potential for OH adsorption.

Original language	English
Pages (from-to)	70-79
Number of pages	10
Journal	Journal of Electroanalytical Chemistry
Volume	662
Issue number	1
DOIs	https://doi.org/10.1016/j.jelechem.2011.03.023
Publication status	Published - 2011 Nov 1
Externally published	Yes

Keywords

Electrocatalyst
Oxygen reduction reaction
Pt nanoparticle
Surface defect

ASJC Scopus subject areas

Analytical Chemistry
Chemical Engineering(all)
Electrochemistry

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10.1016/j.jelechem.2011.03.023

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title = "Enhanced activity of Pt-based electrocatalysts for oxygen reduction via a selective Pt deposition process",

abstract = "Carbon-supported Pt nanoparticles with various loading of Pt are prepared by a novel seed-mediated growth method using hydroquinone (HQ) assisted selective deposition. The structural and morphological dependence of the Pt nanoparticles on the catalytic activity in oxygen reduction reaction (ORR) is investigated. The analysis of core-level X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) cannot elucidate the origin of the large enhancement of the ORR activity. In contrast, electrochemical measurements of the CO-displacement charge and the concomitant CO adlayer oxidation behavior prove that the selective deposition of additional Pt contributed to the decrease of surface defects and to the increase of the onset potential for OH adsorption.",

keywords = "Electrocatalyst, Oxygen reduction reaction, Pt nanoparticle, Surface defect",

author = "Jeon, {Tae Yeol} and Nicola Pinna and Yoo, {Sung Jong} and Yu, {Seung Ho} and Kim, {Sang Kyung} and Seongyop Lim and Donghyun Peck and Jung, {Doo Hwan} and Sung, {Yung Eun}",

note = "Funding Information: This work was support by the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science & Technology (MEST) (NRF-C1AAA001-2010-0029065) and WCU (World Class University) Program (R31-10013). TYJ acknowledges New & Renewable Energy R&D Program (2008NFC08P030000) under the Ministry of Knowledge Economy.",

year = "2011",

month = nov,

day = "1",

doi = "10.1016/j.jelechem.2011.03.023",

language = "English",

volume = "662",

pages = "70--79",

journal = "Journal of Electroanalytical Chemistry",

issn = "1572-6657",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Enhanced activity of Pt-based electrocatalysts for oxygen reduction via a selective Pt deposition process

AU - Jeon, Tae Yeol

AU - Pinna, Nicola

AU - Yoo, Sung Jong

AU - Yu, Seung Ho

AU - Kim, Sang Kyung

AU - Lim, Seongyop

AU - Peck, Donghyun

AU - Jung, Doo Hwan

AU - Sung, Yung Eun

N1 - Funding Information: This work was support by the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science & Technology (MEST) (NRF-C1AAA001-2010-0029065) and WCU (World Class University) Program (R31-10013). TYJ acknowledges New & Renewable Energy R&D Program (2008NFC08P030000) under the Ministry of Knowledge Economy.

PY - 2011/11/1

Y1 - 2011/11/1

N2 - Carbon-supported Pt nanoparticles with various loading of Pt are prepared by a novel seed-mediated growth method using hydroquinone (HQ) assisted selective deposition. The structural and morphological dependence of the Pt nanoparticles on the catalytic activity in oxygen reduction reaction (ORR) is investigated. The analysis of core-level X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) cannot elucidate the origin of the large enhancement of the ORR activity. In contrast, electrochemical measurements of the CO-displacement charge and the concomitant CO adlayer oxidation behavior prove that the selective deposition of additional Pt contributed to the decrease of surface defects and to the increase of the onset potential for OH adsorption.

AB - Carbon-supported Pt nanoparticles with various loading of Pt are prepared by a novel seed-mediated growth method using hydroquinone (HQ) assisted selective deposition. The structural and morphological dependence of the Pt nanoparticles on the catalytic activity in oxygen reduction reaction (ORR) is investigated. The analysis of core-level X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) cannot elucidate the origin of the large enhancement of the ORR activity. In contrast, electrochemical measurements of the CO-displacement charge and the concomitant CO adlayer oxidation behavior prove that the selective deposition of additional Pt contributed to the decrease of surface defects and to the increase of the onset potential for OH adsorption.

KW - Electrocatalyst

KW - Oxygen reduction reaction

KW - Pt nanoparticle

KW - Surface defect

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U2 - 10.1016/j.jelechem.2011.03.023

DO - 10.1016/j.jelechem.2011.03.023

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AN - SCOPUS:80055084398

SN - 1572-6657

VL - 662

SP - 70

EP - 79

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

IS - 1

ER -

Enhanced activity of Pt-based electrocatalysts for oxygen reduction via a selective Pt deposition process

Abstract

Keywords

ASJC Scopus subject areas

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