Enhancement of hydrogen evolution reaction by Pt nanopillar-array electrode in alkaline media and the effect of nanopillar length on the electrode efficiency

Hsyi En Cheng; Wen Lung Li; Zu Po Yang

doi:10.1016/j.ijhydene.2019.09.188

Enhancement of hydrogen evolution reaction by Pt nanopillar-array electrode in alkaline media and the effect of nanopillar length on the electrode efficiency

Hsyi En Cheng^*, Wen Lung Li, Zu Po Yang

^*Corresponding author for this work

Institute of Photonic System

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

6 Scopus citations

Abstract

Pt nanopillar-array 3D electrodes with nanopillar length of 150, 450 and 900 nm and nanopillar density of ~10⁹ cm⁻² were fabricated. Their catalytic activity for hydrogen evolution reaction (HER) was evaluated by linear sweep voltammetry and electrochemical impedance spectroscopy. In comparison with straightly electrodeposited black Pt film and forged Pt sheet electrodes, the HER current density has been significantly improved by the nanopillar-array architecture. The overpotential of HER at current density of 10 mA cm-2 at 26 °C is as low as 78 mV, lower than the black Pt film of 107 mV and the Pt sheet of 174 mV. The improvement of HER is ascribed to the low charge transfer resistance of the 3D electrode and the high desorption capability of hydrogen bubbles at the nanotips. Interestingly, the nanopillar-array 3D electrode has an optimal nanopillar length for HER. The mechanisms for the optimal nanopillar length were investigated here.

Original language	English
Pages (from-to)	30141-30150
Number of pages	10
Journal	International Journal of Hydrogen Energy
Volume	44
Issue number	57
DOIs	https://doi.org/10.1016/j.ijhydene.2019.09.188
State	Published - 15 Nov 2019

Keywords

3D electrode
Electrolysis
Hydrogen evolution
Nanoarchitecture
Platinum

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

Access to Document

10.1016/j.ijhydene.2019.09.188

Fingerprint Dive into the research topics of 'Enhancement of hydrogen evolution reaction by Pt nanopillar-array electrode in alkaline media and the effect of nanopillar length on the electrode efficiency'. Together they form a unique fingerprint.

Cite this

@article{9da072435ec24cb68bf6cde505f33df9,

title = "Enhancement of hydrogen evolution reaction by Pt nanopillar-array electrode in alkaline media and the effect of nanopillar length on the electrode efficiency",

abstract = "Pt nanopillar-array 3D electrodes with nanopillar length of 150, 450 and 900 nm and nanopillar density of ~109 cm−2 were fabricated. Their catalytic activity for hydrogen evolution reaction (HER) was evaluated by linear sweep voltammetry and electrochemical impedance spectroscopy. In comparison with straightly electrodeposited black Pt film and forged Pt sheet electrodes, the HER current density has been significantly improved by the nanopillar-array architecture. The overpotential of HER at current density of 10 mA cm-2 at 26 °C is as low as 78 mV, lower than the black Pt film of 107 mV and the Pt sheet of 174 mV. The improvement of HER is ascribed to the low charge transfer resistance of the 3D electrode and the high desorption capability of hydrogen bubbles at the nanotips. Interestingly, the nanopillar-array 3D electrode has an optimal nanopillar length for HER. The mechanisms for the optimal nanopillar length were investigated here.",

keywords = "3D electrode, Electrolysis, Hydrogen evolution, Nanoarchitecture, Platinum",

author = "Cheng, {Hsyi En} and Li, {Wen Lung} and Yang, {Zu Po}",

year = "2019",

month = nov,

day = "15",

doi = "10.1016/j.ijhydene.2019.09.188",

language = "English",

volume = "44",

pages = "30141--30150",

journal = "International Journal of Hydrogen Energy",

issn = "0360-3199",

publisher = "Elsevier Limited",

number = "57",

}

TY - JOUR

T1 - Enhancement of hydrogen evolution reaction by Pt nanopillar-array electrode in alkaline media and the effect of nanopillar length on the electrode efficiency

AU - Cheng, Hsyi En

AU - Li, Wen Lung

AU - Yang, Zu Po

PY - 2019/11/15

Y1 - 2019/11/15

N2 - Pt nanopillar-array 3D electrodes with nanopillar length of 150, 450 and 900 nm and nanopillar density of ~109 cm−2 were fabricated. Their catalytic activity for hydrogen evolution reaction (HER) was evaluated by linear sweep voltammetry and electrochemical impedance spectroscopy. In comparison with straightly electrodeposited black Pt film and forged Pt sheet electrodes, the HER current density has been significantly improved by the nanopillar-array architecture. The overpotential of HER at current density of 10 mA cm-2 at 26 °C is as low as 78 mV, lower than the black Pt film of 107 mV and the Pt sheet of 174 mV. The improvement of HER is ascribed to the low charge transfer resistance of the 3D electrode and the high desorption capability of hydrogen bubbles at the nanotips. Interestingly, the nanopillar-array 3D electrode has an optimal nanopillar length for HER. The mechanisms for the optimal nanopillar length were investigated here.

AB - Pt nanopillar-array 3D electrodes with nanopillar length of 150, 450 and 900 nm and nanopillar density of ~109 cm−2 were fabricated. Their catalytic activity for hydrogen evolution reaction (HER) was evaluated by linear sweep voltammetry and electrochemical impedance spectroscopy. In comparison with straightly electrodeposited black Pt film and forged Pt sheet electrodes, the HER current density has been significantly improved by the nanopillar-array architecture. The overpotential of HER at current density of 10 mA cm-2 at 26 °C is as low as 78 mV, lower than the black Pt film of 107 mV and the Pt sheet of 174 mV. The improvement of HER is ascribed to the low charge transfer resistance of the 3D electrode and the high desorption capability of hydrogen bubbles at the nanotips. Interestingly, the nanopillar-array 3D electrode has an optimal nanopillar length for HER. The mechanisms for the optimal nanopillar length were investigated here.

KW - 3D electrode

KW - Electrolysis

KW - Hydrogen evolution

KW - Nanoarchitecture

KW - Platinum

UR - http://www.scopus.com/inward/record.url?scp=85073719718&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2019.09.188

DO - 10.1016/j.ijhydene.2019.09.188

M3 - Article

AN - SCOPUS:85073719718

VL - 44

SP - 30141

EP - 30150

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 57

ER -

Enhancement of hydrogen evolution reaction by Pt nanopillar-array electrode in alkaline media and the effect of nanopillar length on the electrode efficiency

Abstract

Keywords

UN SDGs

Access to Document

Other files and links

Cite this