Detailed Characterization of an Annealed Reduced Graphene Oxide Catalyst for Selective Peroxide Formation Activity
- Authors
- Lee, Tae Hoon; Park, Sojung; Choi, Tae Hwan; Zhang, Liang; Kim, Juyoung; Guo, Jinghua; Park, Ho Bum; Kim, Wooyul; Kim, Hyo Won
- Issue Date
- Oct-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- electrocatalyst; oxygen reduction reaction; reduced graphene oxide; carbon characterization; spectroelectrochemistry
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.12, no.41, pp.46439 - 46445
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 12
- Number
- 41
- Start Page
- 46439
- End Page
- 46445
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/8909
- DOI
- 10.1021/acsami.0c11359
- ISSN
- 1944-8244
- Abstract
- Recently, electrochemical hydrogen peroxide (H2O2) generation from oxygen molecules has been extensively studied. Thus far, the best peroxide activity under alkaline conditions has been reported at the surface of a mild reduced graphene oxide annealed at 600 °C (mrGO-600). However, the detailed material information, such as chemical functionality and structural morphology, is unknown, which results in ambiguous debates on its catalytic active sites. To solve this problem, we intensively characterize the structure of mrGO-600 to clarify the origin of its catalytic activity. Various characterizations, including X-ray photoelectron spectroscopy, Raman spectroscopy, infrared spectroscopy, near-edge X-ray absorption fine spectroscopy, and high-resolution transmittance electron microscopy coupled with in situ infrared spectroelecrochemistry, reveal that the annealing process generates not only various hole edge defects that are related to the ring ether group but also numerous point defects that result in a small-sized disconnected graphitic carbon region. These defects are believed to form a unique atomic level configuration in mrGO-600, which enables it to facilitate high peroxide-generated activity from oxygen molecules in an alkaline electrolyte.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 에너지공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/8909)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.