An Ultrasonication-Assisted Cobalt Hydroxide Composite with Enhanced Electrocatalytic Activity toward Oxygen Evolution Reaction

Autor:	Yujun Si, Chaozhong Guo, Chenglong Xie, Zhongping Xiong
Jazyk:	angličtina
Rok vydání:	2018
Předmět:	oxygen evolution reaction electrocatalyst cobalt hydroxide ultrasonication assistance Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Zdroj:	Materials, Vol 11, Iss 10, p 1912 (2018)
Druh dokumentu:	article
ISSN:	1996-1944
DOI:	10.3390/ma11101912
Popis:	A catalyst toward oxygen evolution reaction (OER) was synthesized by depositing cobalt hydroxide on carbon black. Ultrasonication was applied during precipitation to improve the performance of the catalyst. The ultrasonic-assisted process resulted in the refinement of the cobalt hydroxide particles from 400 nm to 50 nm, and the thorough incorporation of these particles with carbon black substrate. The resulting product exhibited enhanced OER catalytic activity with an onset potential of 1.54 V (vs. reversible hydrogen electrode), a Tafel slope of 18.18 mV/dec, and a stable OER potential at a current density of 10 mA cm−2, because of the reduced resistance of the catalyst and the electron transfer resistance.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/2568976f756145a586c9a5e731d45ed4 Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF Plný text ve formátu HTML
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