Water splitting for hydrogen production using a high surface area RuO2 electrocatalyst synthesized in supercritical water

Title
Water splitting for hydrogen production using a high surface area RuO2 electrocatalyst synthesized in supercritical water
Authors
전효상Antonius Dimas Chandra Permana김재훈민병권
Keywords
water splitting; hydrogen; RuO2; Supercritical water; Electrocatalysts; Electrochemical; Particle size
Issue Date
2013-05
Publisher
International journal of hydrogen energy
Citation
VOL 38, NO 14, 6092-6096
Abstract
In water electrolysis, a major obstacle is the anodic reaction for water oxidation where substantial energy loss occurs mainly due to the large overpotential. Therefore, the electrocatalytic material of an anode is of importance to achieve a highly efficient water splitting reaction. Among the various requirements, the surface area of electrocatalysts has been considered a key factor in electrocatalytic reactions. In this study, to obtain a high surface area RuO2 electrocatalyst, a supercritical hydrothermal synthetic method was applied. Indeed, RuO2 particles with the surface area of 78.2 ㎡/g were successfully synthesized, which is 7 times higher compared with the commercial version. We also investigated the electrocatalytic activity of the synthesized high surface area RuO2 by evaluating the number of active sites and hydrogen production rates and compared them with the commercial one as a reference. Based on the cyclic voltammetric measurements, the number of active sites was estimated to be 152.1 mC cm-2 and 17.0 mC cm-2 for the synthetic and the commercial RuO2, respectively. More importantly, the hydrogen production rates measured by the water splitting device with RuO2 films for the anode showed 4 times higher value for the synthetic RuO2 compared with the commercial one.
URI
http://pubs.kist.re.kr/handle/201004/44763
ISSN
03603199
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

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

BROWSE