A graphitic edge plane rich meso-porous carbon anode for alkaline water electrolysis

Title
A graphitic edge plane rich meso-porous carbon anode for alkaline water electrolysis
Authors
함형철Dongyoon ShinMyounghoon ChounJae Kwang LeeJaeyoung Lee
Keywords
alkaline water electrolysis; carbon anode
Issue Date
2017-09
Publisher
Physical chemistry chemical physics : PCCP
Citation
VOL 19, NO 33-21995
Abstract
There is growing interest in alkaline water electrolysis as a sustainable approach for producing hydrogen, but developing efficient and inexpensive catalysts for the oxygen evolution reaction, which can limit the operational efficiency of water electrolysis due to its considerable overpotential, is regarded as the most overriding challenge. Therefore, significant progress has been made in developing catalysts with transition metal and carbon materials as alternative catalysts. Here, we prepared cobalt containing carbon nanofibers via a facile route of electrospinning and pyrolysis, and metal leached carbon nanofibers were also prepared by subsequently leaching the metal. Despite metal leaching, the latter ones still show comparable activity and stability with iridium black in alkaline water electrolysis. After detailed physicochemical and electrochemical characterizations, we revealed that graphitic edge plane rich carbon is mainly responsible for the activity of our material rather than embedded metal species. In addition, the metal plays a role in forming the specific carbon structure along with improving graphitization based on the catalytic graphitization. This result indicates the importance of the graphitic edge plane and might be helpful to understand carbon anodes for alkaline water electrolysis.
URI
http://pubs.kist.re.kr/handle/201004/66111
ISSN
1463-9076
Appears in Collections:
KIST Publication > Article
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