Optimization of sulfur-doped graphene as an emerging platinum nanowires support for oxygen reduction reaction

Md Ariful Hoque; Fathy M. Hassan; Min Ho Seo; Ja Yeon Choi; Mark Pritzker; Shanna Knights; Siyu Ye; Zhongwei Chen

doi:10.1016/j.nanoen.2015.11.004

Optimization of sulfur-doped graphene as an emerging platinum nanowires support for oxygen reduction reaction

Md Ariful Hoque, Fathy M. Hassan, Min Ho Seo, Ja Yeon Choi, Mark Pritzker, Shanna Knights, Siyu Ye, Zhongwei Chen

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

50 Citations (Scopus)

Abstract

The slow kinetics of the oxygen reduction reaction (ORR) on platinum catalyst is a critical parameter for application in polymer electrolyte membrane fuel cells (PEMFCs). Herein, we study the effects of sulfur on the electrochemical activity and stability of sulfur doped graphene supported platinum nanowires (PtNW/SGs). To investigate the influence of sulfur, a series of sulfur-doped graphene materials with varying sulfur contents ranging from 0.35 to 3.95at% are applied as platinum nanowire catalyst supports. Based on the physico-chemical characterizations, electrochemical measurements and density functional theory (DFT) calculations, we find that the amount of sulfur significantly affects the electrokinetics of the Pt nanowires. The best ORR kinetics are observed for the platinum nanowires supported on graphene with 1.40at% sulfur, showing a mass activity of 182mA/mg_Pt and a specific activity of 662μA/cm²_Pt at 0.9V vs. RHE. At this sulfur content, well-defined platinum nanowires with diameters in the range of 4-16nm are observed that are beneficial for enhancing ORR kinetics.

Original language	English
Pages (from-to)	27-38
Number of pages	12
Journal	Nano Energy
Volume	19
DOIs	https://doi.org/10.1016/j.nanoen.2015.11.004
Publication status	Published - Jan 1 2016
Externally published	Yes

Keywords

Activation energy
Oxygen reduction
Pt nanowires
S contents
S doped graphene

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Materials Science(all)
Electrical and Electronic Engineering

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10.1016/j.nanoen.2015.11.004

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title = "Optimization of sulfur-doped graphene as an emerging platinum nanowires support for oxygen reduction reaction",

abstract = "The slow kinetics of the oxygen reduction reaction (ORR) on platinum catalyst is a critical parameter for application in polymer electrolyte membrane fuel cells (PEMFCs). Herein, we study the effects of sulfur on the electrochemical activity and stability of sulfur doped graphene supported platinum nanowires (PtNW/SGs). To investigate the influence of sulfur, a series of sulfur-doped graphene materials with varying sulfur contents ranging from 0.35 to 3.95at% are applied as platinum nanowire catalyst supports. Based on the physico-chemical characterizations, electrochemical measurements and density functional theory (DFT) calculations, we find that the amount of sulfur significantly affects the electrokinetics of the Pt nanowires. The best ORR kinetics are observed for the platinum nanowires supported on graphene with 1.40at% sulfur, showing a mass activity of 182mA/mgPt and a specific activity of 662μA/cm2Pt at 0.9V vs. RHE. At this sulfur content, well-defined platinum nanowires with diameters in the range of 4-16nm are observed that are beneficial for enhancing ORR kinetics.",

keywords = "Activation energy, Oxygen reduction, Pt nanowires, S contents, S doped graphene",

author = "Hoque, {Md Ariful} and Hassan, {Fathy M.} and Seo, {Min Ho} and Choi, {Ja Yeon} and Mark Pritzker and Shanna Knights and Siyu Ye and Zhongwei Chen",

note = "Funding Information: The work was supported by NSERC, the University of Waterloo and the Waterloo Institute for Nanotechnology. This research was conducted as part of the Catalysis Research for Polymer Electrolyte Fuel Cells (CaRPE FC) Network administered from Simon Fraser University and supported by Automotive Partnership Canada (APC) Grant APCPJ 417858-11 through the Natural Sciences and Engineering Research Council of Canada (NSERC) . Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

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doi = "10.1016/j.nanoen.2015.11.004",

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T1 - Optimization of sulfur-doped graphene as an emerging platinum nanowires support for oxygen reduction reaction

AU - Hoque, Md Ariful

AU - Hassan, Fathy M.

AU - Seo, Min Ho

AU - Choi, Ja Yeon

AU - Pritzker, Mark

AU - Knights, Shanna

AU - Ye, Siyu

AU - Chen, Zhongwei

N1 - Funding Information: The work was supported by NSERC, the University of Waterloo and the Waterloo Institute for Nanotechnology. This research was conducted as part of the Catalysis Research for Polymer Electrolyte Fuel Cells (CaRPE FC) Network administered from Simon Fraser University and supported by Automotive Partnership Canada (APC) Grant APCPJ 417858-11 through the Natural Sciences and Engineering Research Council of Canada (NSERC) . Publisher Copyright: © 2015 Elsevier Ltd.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - The slow kinetics of the oxygen reduction reaction (ORR) on platinum catalyst is a critical parameter for application in polymer electrolyte membrane fuel cells (PEMFCs). Herein, we study the effects of sulfur on the electrochemical activity and stability of sulfur doped graphene supported platinum nanowires (PtNW/SGs). To investigate the influence of sulfur, a series of sulfur-doped graphene materials with varying sulfur contents ranging from 0.35 to 3.95at% are applied as platinum nanowire catalyst supports. Based on the physico-chemical characterizations, electrochemical measurements and density functional theory (DFT) calculations, we find that the amount of sulfur significantly affects the electrokinetics of the Pt nanowires. The best ORR kinetics are observed for the platinum nanowires supported on graphene with 1.40at% sulfur, showing a mass activity of 182mA/mgPt and a specific activity of 662μA/cm2Pt at 0.9V vs. RHE. At this sulfur content, well-defined platinum nanowires with diameters in the range of 4-16nm are observed that are beneficial for enhancing ORR kinetics.

AB - The slow kinetics of the oxygen reduction reaction (ORR) on platinum catalyst is a critical parameter for application in polymer electrolyte membrane fuel cells (PEMFCs). Herein, we study the effects of sulfur on the electrochemical activity and stability of sulfur doped graphene supported platinum nanowires (PtNW/SGs). To investigate the influence of sulfur, a series of sulfur-doped graphene materials with varying sulfur contents ranging from 0.35 to 3.95at% are applied as platinum nanowire catalyst supports. Based on the physico-chemical characterizations, electrochemical measurements and density functional theory (DFT) calculations, we find that the amount of sulfur significantly affects the electrokinetics of the Pt nanowires. The best ORR kinetics are observed for the platinum nanowires supported on graphene with 1.40at% sulfur, showing a mass activity of 182mA/mgPt and a specific activity of 662μA/cm2Pt at 0.9V vs. RHE. At this sulfur content, well-defined platinum nanowires with diameters in the range of 4-16nm are observed that are beneficial for enhancing ORR kinetics.

KW - Activation energy

KW - Oxygen reduction

KW - Pt nanowires

KW - S contents

KW - S doped graphene

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JO - Nano Energy

JF - Nano Energy

ER -

Optimization of sulfur-doped graphene as an emerging platinum nanowires support for oxygen reduction reaction

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Keywords

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