Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Stable surface oxygen on nanostructured silver for efficient CO2 electroreduction

Authors
Jee, Michael ShincheonKim, HaeriJeon, Hyo SangChae, Keun HwaCho, JinhanMin, Byoung KounHwang, Yun Jeong
Issue Date
15-6월-2017
Publisher
ELSEVIER SCIENCE BV
Keywords
CO2 electroreduction; Silver; Surface oxygen; NEXAFS; Auger spectroscopy; KPFM
Citation
CATALYSIS TODAY, v.288, pp.48 - 53
Indexed
SCIE
SCOPUS
Journal Title
CATALYSIS TODAY
Volume
288
Start Page
48
End Page
53
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/83116
DOI
10.1016/j.cattod.2016.09.026
ISSN
0920-5861
Abstract
We investigated properties involved in the enhancement in electrocatalytic carbon dioxide (CO2) reduction to carbon monoxide (CO) in electrochemically treated Ag surfaces with surface sensitive analysis methods such as Auger spectroscopy, atomic force microscopy (AFM) coupled with Kelvin probe force microscopy (KPFM) techniques, and near edge X-ray absorption fine structure (NEXAFS) spectroscopy. The absence of Ag M(4,5)VVAuger signals for the electrochemically treated Ag indicate the presence of localized surface oxygen (O) which survives on the best performing Ag electrocatalysts even in the reductive environment of the CO2 reduction reaction. Higher work functions were located at the nanostructure boundaries observed by KPFM/AFM implying the higher surface O concentrations in these regions. Furthermore, NEXAFS measured the selective prominence of pi* states over sigma* in the active Ag surfaces which suggests stronger interaction with intermediates of CO2 reduction while minimizing the OH interaction contributing to increase CO2 reduction activity and selectivity. These results provide direction in engineering surfaces for efficient electrochemical CO2 conversion. (C) 2016 Elsevier B.V. All rights reserved.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Cho, Jin han photo

Cho, Jin han
공과대학 (화공생명공학과)
Read more

Altmetrics

Total Views & Downloads

BROWSE