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Synthesis of transition metal sulfide and reduced graphene oxide hybrids as efficient electrocatalysts for oxygen evolution reactions

Title
Synthesis of transition metal sulfide and reduced graphene oxide hybrids as efficient electrocatalysts for oxygen evolution reactions
Author
송태섭
Keywords
electrocatalyst; water splitting; oxygen evolution reaction; cobalt nickel sulfide; reduced graphene oxide; nanocomposites
Issue Date
2018-09
Publisher
ROYAL SOC
Citation
ROYAL SOCIETY OPEN SCIENCE, v. 5, no. 9, Article no. 180927
Abstract
The development of electrochemical devices for renewable energy depends to a large extent on fundamental improvements in catalysts for oxygen evolution reactions (OERs). OER activity of transition metal sulfides (TMSs) can be improved by compositing with highly conductive supports possessing a high surface-to-volume ratio, such as reduced graphene oxide (rGO). Herein we report on the relationship between synthetic conditions and the OER catalytic properties of TMSs and rGO (TMS-rGO) hybrids. Starting materials, reaction temperature and reaction time were controlled to synergistically boost the OER catalytic activity of TMS-rGO hybrids. Our results showed that (i) compared with sulfides, hydroxides are favourable as starting materials to produce the desired TMS-rGO hybrid nanostructure and (ii) high reaction temperatures and longer reaction times can increase physicochemical interaction between TMSs and rGO supports, resulting in highly efficient OER catalytic activity.
URI
https://royalsocietypublishing.org/doi/10.1098/rsos.180927https://repository.hanyang.ac.kr/handle/20.500.11754/119925
ISSN
2054-5703
DOI
10.1098/rsos.180927
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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