Han, HyukSu, Choi, Heechae ORCID: 0000-0002-9390-6607, Mhin, Sungwook ORCID: 0000-0001-5515-8399, Hong, Yu-Rim, Kim, Kang Min, Kwon, Jiseok, Ali, Ghulam ORCID: 0000-0003-2815-6667, Chung, Kyung Yoon ORCID: 0000-0002-1273-746X, Je, Minyeong, Umh, Ha Nee, Lim, Dong-Ha, Davey, Kenneth, Qiao, Shi-Zhang, Paik, Ungyu and Song, Taeseup (2019). Advantageous crystalline-amorphous phase boundary for enhanced electrochemical water oxidation. Energy Environ. Sci., 12 (8). CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1754-5706

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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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Han, HyukSuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Choi, HeechaeUNSPECIFIEDorcid.org/0000-0002-9390-6607UNSPECIFIED
Mhin, SungwookUNSPECIFIEDorcid.org/0000-0001-5515-8399UNSPECIFIED
Hong, Yu-RimUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kim, Kang MinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kwon, JiseokUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ali, GhulamUNSPECIFIEDorcid.org/0000-0003-2815-6667UNSPECIFIED
Chung, Kyung YoonUNSPECIFIEDorcid.org/0000-0002-1273-746XUNSPECIFIED
Je, MinyeongUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Umh, Ha NeeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lim, Dong-HaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Davey, KennethUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Qiao, Shi-ZhangUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paik, UngyuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Song, TaeseupUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-145711
DOI: 10.1039/c9ee00950g
Journal or Publication Title: Energy Environ. Sci.
Volume: 12
Number: 8
Date: 2019
Publisher: ROYAL SOC CHEMISTRY
Place of Publication: CAMBRIDGE
ISSN: 1754-5706
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
EFFICIENT; HYDROGEN; CATALYSTS; ELECTROCATALYST; TRENDS; NICOPMultiple languages
Chemistry, Multidisciplinary; Energy & Fuels; Engineering, Chemical; Environmental SciencesMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/14571

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