Quasi-single-crystalline CoO hexagrams with abundant defects for highly efficient electrocatalytic water oxidation

Liang, Zuozhong (author)

Huang, Zhehao (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Yuan, Haitao (author)

Yang, Zhiyuan (author)

Zhang, Chaochao (author)

Xu, Yang (author)

Zhang, Wei (author)

Zheng, Haoquan (author)

Cao, Rui (author)

(creator_code:org_t)

2018
2018
English.
In: Chemical Science. - : Royal Society of Chemistry (RSC). - 2041-6520 .- 2041-6539. ; 9:34, s. 6961-6968

Related links:: https://doi.org/10.1...; show more...; https://pubs.rsc.org...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

Defects and structural long-range ordering have been recognized as two crucial characters for advanced electrocatalysts. However, these two features have rarely been achieved together. Herein, we report the preparation of single-crystalline CoO hexagrams and demonstrate their exceptional electrocatalytic properties for water oxidation. The quasi-single-crystalline CoO hexagrams, prepared at the critical phase transition point of -Co(OH)(2)/Co(OH)F hexagrams, possess both abundant oxygen vacancies as defects and structural long-range ordering. The matching between the b-axis of Co(OH)F crystals and the a-axis of -Co(OH)(2) crystals is critical for the formation of the CoO hexagram single crystals. The quasi-single-crystalline CoO hexagrams with abundant defects are highly efficient for water oxidation by delivering a 10 mA cm(-2) current density at a low overpotential of 269 mV in a 1 M KOH aqueous solution.

By the author/editor: Liang, Zuozhong; Huang, Zhehao; Yuan, Haitao; Yang, Zhiyuan; Zhang, Chaochao; Xu, Yang; show more...; Zhang, Wei; Zheng, Haoquan; Cao, Rui; show less...

About the subject

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