Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid

Ying Wang; Yuanmiao Sun; Hanbin Liao; Shengnan Sun; Shuzhou Li; Joel W. Ager; Zhichuan J. Xu

doi:10.1016/j.electacta.2016.05.095

Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid

Ying Wang, Yuanmiao Sun, Hanbin Liao, Shengnan Sun, Shuzhou Li, Joel W. Ager, Zhichuan J. Xu^*

^*Corresponding author for this work

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

36 Citations (Scopus)

Abstract

This article reports a study of electrochemical cycling effects on hydrogen evolution catalytic activity of gold nanoparticles in sulfuric acid. We found that after cycling within the double layer regime, up to 0.64 V vs RHE, there is a dramatic effect on the HER activity of gold nanoparticles: 128 mV drop of the overpotential, a decrease of 23 mV/dec for the Tafel slope as well as a nearly twenty times increase of the turn-over frequency (TOF). This enhanced activity is tentatively assigned to the formation of stepped like structures by the consecutive electrochemical cycling in the double layer region.

Original language	English
Pages (from-to)	440-447
Number of pages	8
Journal	Electrochimica Acta
Volume	209
DOIs	https://doi.org/10.1016/j.electacta.2016.05.095
Publication status	Published - Aug 10 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016 Elsevier Ltd. All rights reserved.

ASJC Scopus Subject Areas

General Chemical Engineering
Electrochemistry

Keywords

electrocatalysis
gold
hydrogen evolution reaction
nanoparticles

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10.1016/j.electacta.2016.05.095

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title = "Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid",

abstract = "This article reports a study of electrochemical cycling effects on hydrogen evolution catalytic activity of gold nanoparticles in sulfuric acid. We found that after cycling within the double layer regime, up to 0.64 V vs RHE, there is a dramatic effect on the HER activity of gold nanoparticles: 128 mV drop of the overpotential, a decrease of 23 mV/dec for the Tafel slope as well as a nearly twenty times increase of the turn-over frequency (TOF). This enhanced activity is tentatively assigned to the formation of stepped like structures by the consecutive electrochemical cycling in the double layer region.",

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T1 - Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid

AU - Wang, Ying

AU - Sun, Yuanmiao

AU - Liao, Hanbin

AU - Sun, Shengnan

AU - Li, Shuzhou

AU - Ager, Joel W.

AU - Xu, Zhichuan J.

PY - 2016/8/10

Y1 - 2016/8/10

N2 - This article reports a study of electrochemical cycling effects on hydrogen evolution catalytic activity of gold nanoparticles in sulfuric acid. We found that after cycling within the double layer regime, up to 0.64 V vs RHE, there is a dramatic effect on the HER activity of gold nanoparticles: 128 mV drop of the overpotential, a decrease of 23 mV/dec for the Tafel slope as well as a nearly twenty times increase of the turn-over frequency (TOF). This enhanced activity is tentatively assigned to the formation of stepped like structures by the consecutive electrochemical cycling in the double layer region.

AB - This article reports a study of electrochemical cycling effects on hydrogen evolution catalytic activity of gold nanoparticles in sulfuric acid. We found that after cycling within the double layer regime, up to 0.64 V vs RHE, there is a dramatic effect on the HER activity of gold nanoparticles: 128 mV drop of the overpotential, a decrease of 23 mV/dec for the Tafel slope as well as a nearly twenty times increase of the turn-over frequency (TOF). This enhanced activity is tentatively assigned to the formation of stepped like structures by the consecutive electrochemical cycling in the double layer region.

KW - electrocatalysis

KW - gold

KW - hydrogen evolution reaction

KW - nanoparticles

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VL - 209

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JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Activation Effect of Electrochemical Cycling on Gold Nanoparticles towards the Hydrogen Evolution Reaction in Sulfuric Acid

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

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