Park, Hee-Young Shin, Tae Joo Joh, Han-Ik Jang, Jong Hyun Ahn, Docheon Yoo, Sung Jong 2024-01-20T10:03:33Z 2024-01-20T10:03:33Z 2021-09-04 2014-04 1388-2481 https://pubs.kist.re.kr/handle/201004/126971 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. (C) 2014 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE INC Graphene-oxide-intercalated layered manganese oxides as an efficient oxygen reduction reaction catalyst in alkaline media Article 10.1016/j.elecom.2014.01.019 1 ELECTROCHEMISTRY COMMUNICATIONS, v.41, pp.35 - 38 ELECTROCHEMISTRY COMMUNICATIONS 41 35 38 N scie scopus 000333858100010 2-s2.0-84893901712 Electrochemistry Electrochemistry Article NANOPARTICLES CATHODE Fuel cell Oxygen reduction reaction Layered MnO2 Graphene oxide intercalation