Nanoporous Au Thin Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction

Jun Tae Song, Hyewon Ryoo, Minhyung Cho, Jaehoon Kim, Jin Gyu Kim, Sung Yoon Chung, Jihun Oh

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

An Si photoelectrode with a nanoporous Au thin film for highly selective and efficient photoelectrochemical (PEC) CO2 reduction reaction (CO2RR) is presented. The nanoporous Au thin film is formed by electrochemical reduction of an anodized Au thin film. The electrochemical treatments of the Au thin film critically improve CO2 reduction catalytic activity of Au catalysts and exhibit CO Faradaic efficiency of 96% at 480 mV of overpotential. To apply the electrochemical pretreatment of Au films for PEC CO2RR, a new Si photoelectrode design with mesh-type co-catalysts independently wired at the front and the back of the photoelectrode is demonstrated. Due to the superior CO2RR activity of the nanoporous Au mesh and high photovoltage from Si, the Si photoelectrode with the nanoporous Au thin film mesh shows conversion of CO2 to CO with 91% Faradaic efficiency at positive potential than the CO2/CO equilibrium potential.

Original languageEnglish
Article number1601103
JournalAdvanced Energy Materials
Volume7
Issue number3
DOIs
Publication statusPublished - Feb 8 2017
Externally publishedYes

Fingerprint

Thin films
Carbon Monoxide
Catalysts
Catalyst activity

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Nanoporous Au Thin Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction. / Song, Jun Tae; Ryoo, Hyewon; Cho, Minhyung; Kim, Jaehoon; Kim, Jin Gyu; Chung, Sung Yoon; Oh, Jihun.

In: Advanced Energy Materials, Vol. 7, No. 3, 1601103, 08.02.2017.

Research output: Contribution to journalArticle

Song, Jun Tae ; Ryoo, Hyewon ; Cho, Minhyung ; Kim, Jaehoon ; Kim, Jin Gyu ; Chung, Sung Yoon ; Oh, Jihun. / Nanoporous Au Thin Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction. In: Advanced Energy Materials. 2017 ; Vol. 7, No. 3.
@article{824e07e93c35499a80b7f61e29c48f3a,
title = "Nanoporous Au Thin Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction",
abstract = "An Si photoelectrode with a nanoporous Au thin film for highly selective and efficient photoelectrochemical (PEC) CO2 reduction reaction (CO2RR) is presented. The nanoporous Au thin film is formed by electrochemical reduction of an anodized Au thin film. The electrochemical treatments of the Au thin film critically improve CO2 reduction catalytic activity of Au catalysts and exhibit CO Faradaic efficiency of 96{\%} at 480 mV of overpotential. To apply the electrochemical pretreatment of Au films for PEC CO2RR, a new Si photoelectrode design with mesh-type co-catalysts independently wired at the front and the back of the photoelectrode is demonstrated. Due to the superior CO2RR activity of the nanoporous Au mesh and high photovoltage from Si, the Si photoelectrode with the nanoporous Au thin film mesh shows conversion of CO2 to CO with 91{\%} Faradaic efficiency at positive potential than the CO2/CO equilibrium potential.",
author = "Song, {Jun Tae} and Hyewon Ryoo and Minhyung Cho and Jaehoon Kim and Kim, {Jin Gyu} and Chung, {Sung Yoon} and Jihun Oh",
year = "2017",
month = "2",
day = "8",
doi = "10.1002/aenm.201601103",
language = "English",
volume = "7",
journal = "Advanced Energy Materials",
issn = "1614-6832",
publisher = "Wiley-VCH Verlag",
number = "3",

}

TY - JOUR

T1 - Nanoporous Au Thin Films on Si Photoelectrodes for Selective and Efficient Photoelectrochemical CO2 Reduction

AU - Song, Jun Tae

AU - Ryoo, Hyewon

AU - Cho, Minhyung

AU - Kim, Jaehoon

AU - Kim, Jin Gyu

AU - Chung, Sung Yoon

AU - Oh, Jihun

PY - 2017/2/8

Y1 - 2017/2/8

N2 - An Si photoelectrode with a nanoporous Au thin film for highly selective and efficient photoelectrochemical (PEC) CO2 reduction reaction (CO2RR) is presented. The nanoporous Au thin film is formed by electrochemical reduction of an anodized Au thin film. The electrochemical treatments of the Au thin film critically improve CO2 reduction catalytic activity of Au catalysts and exhibit CO Faradaic efficiency of 96% at 480 mV of overpotential. To apply the electrochemical pretreatment of Au films for PEC CO2RR, a new Si photoelectrode design with mesh-type co-catalysts independently wired at the front and the back of the photoelectrode is demonstrated. Due to the superior CO2RR activity of the nanoporous Au mesh and high photovoltage from Si, the Si photoelectrode with the nanoporous Au thin film mesh shows conversion of CO2 to CO with 91% Faradaic efficiency at positive potential than the CO2/CO equilibrium potential.

AB - An Si photoelectrode with a nanoporous Au thin film for highly selective and efficient photoelectrochemical (PEC) CO2 reduction reaction (CO2RR) is presented. The nanoporous Au thin film is formed by electrochemical reduction of an anodized Au thin film. The electrochemical treatments of the Au thin film critically improve CO2 reduction catalytic activity of Au catalysts and exhibit CO Faradaic efficiency of 96% at 480 mV of overpotential. To apply the electrochemical pretreatment of Au films for PEC CO2RR, a new Si photoelectrode design with mesh-type co-catalysts independently wired at the front and the back of the photoelectrode is demonstrated. Due to the superior CO2RR activity of the nanoporous Au mesh and high photovoltage from Si, the Si photoelectrode with the nanoporous Au thin film mesh shows conversion of CO2 to CO with 91% Faradaic efficiency at positive potential than the CO2/CO equilibrium potential.

UR - http://www.scopus.com/inward/record.url?scp=84995792387&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84995792387&partnerID=8YFLogxK

U2 - 10.1002/aenm.201601103

DO - 10.1002/aenm.201601103

M3 - Article

AN - SCOPUS:84995792387

VL - 7

JO - Advanced Energy Materials

JF - Advanced Energy Materials

SN - 1614-6832

IS - 3

M1 - 1601103

ER -