Universität zu Köln

Han, HyukSu, Hong, Yu-Rim, Woo, Jungwook, Mhin, Sungwook, Kim, Kang Min, Kwon, Jiseok, Choi, Heechae ORCID: 0000-0002-9390-6607, Chung, Yong-Chae and Song, Taeseup (2019). Electronically Double-Layered Metal Boride Hollow Nanoprism as an Excellent and Robust Water Oxidation Electrocatalysts. Adv. Energy Mater., 9 (13). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1614-6840

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Abstract

Metal-metalloid compounds have been paid much attention as new high-performance water oxidation catalysts due to their exceptional durability for water oxidation in alkaline media originating from the multi-dimensional covalent bonding of the metalloid with the surrounding metal atoms. However, compared to the excellent stability, a relatively low catalytic activity of metal-metalloids often limits their practical application as high-performance water oxidation catalysts. Here, for the first time, disclosed is a novel self-templating strategy combined with atomic layer deposition (ALD) to design the electrochemically active and stable quaternary metal boride (vanadium-doped cobalt nickel boride, VCNB), hollow nanoprism by inducing electronic double layers on the surface. The incorporation of V in a double-layered structure can substantially increase the number of surface active sites with unsaturated electronic structure. Furthermore, the induced electronic double layers of V can effectively protect the dissolution of the surface active sites. In addition, density functional theory (DFT) calculations reveal that the impressive water oxidation properties of VCNB originate from the synergetic physicochemical effects of the different metal elements, Co and B as active sites, Ni as a surface electronic structure modifier, and V as a charge carrier transporter and supplier.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Han, HyukSu UNSPECIFIED UNSPECIFIED UNSPECIFIED Hong, Yu-Rim UNSPECIFIED UNSPECIFIED UNSPECIFIED Woo, Jungwook UNSPECIFIED UNSPECIFIED UNSPECIFIED Mhin, Sungwook UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Kang Min UNSPECIFIED UNSPECIFIED UNSPECIFIED Kwon, Jiseok UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Heechae UNSPECIFIED orcid.org/0000-0002-9390-6607 UNSPECIFIED Chung, Yong-Chae UNSPECIFIED UNSPECIFIED UNSPECIFIED Song, Taeseup UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-150994
DOI:	10.1002/aenm.201803799
Journal or Publication Title:	Adv. Energy Mater.
Volume:	9
Number:	13
Date:	2019
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1614-6840
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EFFICIENT HYDROGEN-EVOLUTION; BIFUNCTIONAL ELECTROCATALYST; HIGHLY EFFICIENT; OXYGEN EVOLUTION; CATALYSTS; NICOP Multiple languages Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15099