Enhancing the Electrocatalytic Activity via Hybridization of Cu(I/II) Oxides with Co3O4 Towards Oxygen Electrode Reactions | Sciact - CRIS-system of Boreskov Institute of Catalysis

Enhancing the Electrocatalytic Activity via Hybridization of Cu(I/II) Oxides with Co3O4 Towards Oxygen Electrode Reactions Full article

Journal

Journal of Power Sources
ISSN: 0378-7753

Output data

Year: 2021, Volume: 490, Article number : 229511, Pages count : 11 DOI: 10.1016/j.jpowsour.2021.229511

Tags

Electrocatalysis; Mixed valence oxides; Oxygen evolution reaction; Oxygen reduction reaction

Authors

Hazarika Kumar Kashyap ¹ , Yamada Yusuke ² , Matus Ekaterina V. ³ , Kerzhentsev Mikhail ³ , Bharali Pankaj ¹

Affiliations

1	Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India
2	Department of Applied Chemistry & Bioengineering, Graduate School of Engineering, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
3	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia

Funding (1)

Russian Foundation for Basic Research

18-53-45012

Transition metal oxide based electrocatalysts (ECs) with mixed valence state have gained considerable attention in recent times. Herein, Co3O4–CuO/Cu2O/C nanostructure with mixed valence oxides is reported as an efficient bi-functional EC towards oxygen electrode reactions in alkaline medium. The EC displays higher current density of 6.2 mA cm−2 and mass activity of 12.9 mA mg−1 compared to that of commercially available Pt/C in 0.1 M KOH solution for oxygen reduction reaction (ORR). Rotating disk electrode measurements are used to understand the kinetics of the reaction and the EC is durable up to 1000 redox cycles. The material is highly stable up to 7000 s by retaining 99% of its initial current. The fast electron transfer is established by the smaller Tafel slope value of 83.6 mV dec−1. In addition, the prepared material is also active for oxygen evolution reaction (OER) in 0.1 M KOH solution. Thus, the nanostructure with different bimetallic active sites is found to be a potential material for oxygen electrocatalysis. © 2021 Elsevier B.V.

Hazarika K.K. , Yamada Y. , Matus E.V. , Kerzhentsev M. , Bharali P.
Enhancing the Electrocatalytic Activity via Hybridization of Cu(I/II) Oxides with Co3O4 Towards Oxygen Electrode Reactions
Journal of Power Sources. 2021. V.490. 229511 :1-11. DOI: 10.1016/j.jpowsour.2021.229511 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Oct 8, 2020
Accepted:	Jan 11, 2021
Published online:	Jan 29, 2021
Published print:	Apr 1, 2021

Web of science:	WOS:000621173600004
Scopus:	2-s2.0-85100025797
Elibrary:	44976964
Chemical Abstracts:	2021:250110
OpenAlex:	W3126254447

DB	Citing
Scopus	14
Web of science	15
Elibrary	12
OpenAlex	14