Graphene-oxide-intercalated layered manganese oxides as an efficient oxygen reduction reaction catalyst in alkaline media

Title
Graphene-oxide-intercalated layered manganese oxides as an efficient oxygen reduction reaction catalyst in alkaline media
Authors
박희영신태주조한익장종현안도천유성종
Keywords
electrolysis; fuel cell; MnO2; graphene; Oxygen reduction reaction; Layered MnO2; Graphene oxide intercalation
Issue Date
2014-04
Publisher
Electrochemistry communications
Citation
VOL 41, NO 4, 35-38
Abstract
A graphene-oxide-intercalated layered manganese oxide (GO-HLMO) was prepared by intercalating graphene oxide (GO) into the protonated layered manganese oxide (HLMO, H0.32MnO2), and its enhanced activity towards oxygen reduction reactions (ORR) in alkaline media was demonstrated. As a result of GO intercalation, decreases in interlayer distance and in Mn oxidation state were experimentally confirmed by X-ray diffraction (XRD), X-ray absorption near-edge structure (XANES), and X-ray photoelectron spectroscopic (XPS) analysis. Cyclic voltammetry (CV) analysis indicated that GO-HLMO had more accessible Mn(III)/Mn(IV) sites than HLMO, which probably resulted in the large enhancement in ORR activity in alkaline media, from 0.236 A g− 1 (HLMO) to 0.735 A g− 1 (GO-HLMO) at 0.8 V vs. RHE.
URI
http://pubs.kist.re.kr/handle/201004/47295
ISSN
13882481
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

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

BROWSE