Advantageous crystalline?amorphous phase boundary for enhanced electrochemical water oxidation

Title
Advantageous crystalline?amorphous phase boundary for enhanced electrochemical water oxidation
Authors
정경윤굴람 알리HyukSu HanHeechae ChoiSungwook MhinYu-Rim HongKang Min KimJiseok KwonMinyeong JeHa Nee UmhDong-Ha LimKenneth DaveyShi-Zhang QiaoUngyu PaikTaeseup Song
Keywords
crystalline-amorphous phase boundary; water oxidation
Issue Date
2019-08
Publisher
Energy & environmental science
Citation
VOL 12, NO 8-2454
Abstract
The development of cost-effective and high-performance electrocatalysts for water oxidation has attracted intense research interest. It was reported recently that the interface between the amorphous and crystalline phases plays a significant role in the electrocatalytic activity of transition metal compounds. It was reckoned therefore that an increase in the density of the crystalline– amorphous phase boundary would enhance the electrochemical water oxidation on the catalyst. In this work we develop a new and facile strategy for inducing high density crystalline– amorphous phase boundaries via selective fluorination surface doping. This resulted in excellent characteristics of the engineered material for electrochemical water splitting. An initial computational simulation is carried out to design the crystalline– amorphous phase boundary material and an experimental verification follows for demonstration and optimization of the impact of surface doping. We conclude that the engineering of the interface using this facile and cost-effective strategy maximizes the crystalline and amorphous phases of metal– metalloids, which can be used to fabricate low-cost and efficient electrocatalysts for water oxidation.
URI
http://pubs.kist.re.kr/handle/201004/69713
ISSN
1754-5692
Appears in Collections:
KIST Publication > Article
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