Cobalt Based Nanoparticles Embedded Reduced Graphene Oxide Aerogel for Hydrogen Evolution Electrocatalyst

Title
Cobalt Based Nanoparticles Embedded Reduced Graphene Oxide Aerogel for Hydrogen Evolution Electrocatalyst
Authors
오영탁구성환리동준윤태영최동성이경은이길용임준원수지트라 사시칼라이호진김인호정홍주리샵 쟈인김상욱
Issue Date
2019-07
Publisher
Particle & particle systems characterization : measurement and description of particle properties and behavior in powders and other disperse systems
Citation
VOL 36, NO 7-1900090-7
Abstract
Efficient water electrolysis catalyst is highly demanded for the production of hydrogen as a sustainable energy fuel. It is reported that cobalt derived nanoparticle (CoS2, CoP, CoS|P) decorated reduced graphene oxide (rGO) composite aerogel catalysts for highly active and reliable hydrogen evolution reaction electrocatalysts. 7 nm level cobalt derived nanoparticles are synthesized over graphene aerogel surfaces with excellent surface coverage and maximal expose of active sites. CoS|P/rGO hybrid aerogel composites show an excellent catalytic activity with overpotential of approximate to 169 mV at a current density of approximate to 10 mA cm(-2). Accordingly, efficient charge transfer is attained with Tafel slope of approximate to 52 mV dec(-1) and a charge transfer resistance (R-ct) of approximate to 12 omega. This work suggests a viable route toward ultrasmall, uniform nanoparticles decorated graphene surfaces with well-controlled chemical compositions, which can be generally useful for various applications commonly requiring large exposure of active surface area as well as robust interparticle charger transfer.
URI
http://pubs.kist.re.kr/handle/201004/71064
ISSN
0934-0866
Appears in Collections:
KIST Publication > Article
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