A Tailored Bifunctional Electrocatalyst: Boosting Oxygen Reduction/Evolution Catalysis via Electron Transfer Between N-Doped Graphene and Perovskite Oxides

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
A Tailored Bifunctional Electrocatalyst: Boosting Oxygen Reduction/Evolution Catalysis via Electron Transfer Between N-Doped Graphene and Perovskite Oxides
Author
Bu, YunfeiNam, GyutaeKim, SeonaChoi, KeunsuZhong, QinLee, Jun HeeQin, YongCho, JaephilKim, Guntae
Issue Date
2018-11
Publisher
WILEY-V C H VERLAG GMBH
Citation
SMALL, v.14, no.48, pp.1802767
Abstract
Fabricating perovskite oxide/carbon material composite catalysts is a widely accepted strategy to enhance oxygen reduction reaction/oxygen evolution reaction (ORR and OER) catalytic activities. Herein, synthesized, porous, perovskite‐type Sm0.5Sr0.5CoO3‐δ hollow nanofibers (SSC‐HF) are hybridized with cross‐linked, 3D, N‐doped graphene (3DNG). This rationally designed hybrid catalyst, SSC‐HF‐3DNG (SSC‐HG), exhibits a remarkable enhancement in ORR/OER activity in alkaline media. The synergistic effects between SSC and 3DNG during their ORR and OER processes are firstly revealed by density functional theory calculations. It suggests that electron transport from 3DNG to O2 and SSC increases the activity of electrocatalytic reactions (ORR and OER) by activating O2, increasing the covalent bonding of lattice oxygen. This electron transfer-accelerated catalysis behavior in SSC‐HG will provide design guidelines for composites of perovskite and carbon with bifunctional catalysts.
URI
https://scholarworks.unist.ac.kr/handle/201301/25429
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/smll.201802767
DOI
10.1002/smll.201802767
ISSN
1613-6810
Appears in Collections:
ECHE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

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

MENU