Unraveling the Role of CeO2 in Stabilization of Multivalent Mn Species on α-MnO2/Mn3O4/CeO2/C Surface for Enhanced Electrocatalysis | Sciact - CRIS-system of Boreskov Institute of Catalysis

Unraveling the Role of CeO2 in Stabilization of Multivalent Mn Species on α-MnO2/Mn3O4/CeO2/C Surface for Enhanced Electrocatalysis Full article

Journal

Energy and Fuels
ISSN: 0887-0624 , E-ISSN: 1520-5029

Output data

Year: 2021, Volume: 35, Number: 13, Pages: 10756-10769 Pages count : 14 DOI: 10.1021/acs.energyfuels.1c00785

Tags

Redox reactions, Carbon, Electrodes, Catalysts, Transition metals

Authors

Chutia Bhugendra ¹ , Hussain Nayab ¹ , Puzari Panchanan ¹ , Jampaiah Deshetti ² , Bhargava Suresh K. ² , Matus Ekaterina V. ³ , Ismagilov Ilyas Z. ³ , Kerzhentsev Mikhail ³ , Bharali Pankaj ¹

Affiliations

1	Department of Chemical Sciences, Tezpur University, Tezpur, Assam 784 028, India
2	Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science, RMIT University, Melbourne, Victoria 3001, Australia
3	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia

Funding (2)

1	Russian Foundation for Basic Research	18-53-45012
2	Council of Scientific and Industrial Research

A hybrid heteronanostructure of α-MnO2/Mn3O4/CeO2 with the atomic-level coupled nanointerface entrenched in Vulcan carbon is reported and explored for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). CeO2 plays an essential role in increasing the surface Mn2+/3+/4+ in α-MnO2/Mn3O4/CeO2/C for ORR/OER processes. It shows enhanced bifunctional activity, superior to that of the benchmark 20 wt % Pt/C and Pd/C catalysts. It displays an ORR onset potential of −0.13 V (vs Ag/AgCl), limiting current density of −6.63 mA cm–2 (at 1600 rpm), mass-specific current of 47.6 mA mgMO–1 with a lower Tafel slope (921.9 mV dec–1), and an inclusive 4-e transfer involved in ORR. The OER onset potential and current density are 0.58 V (vs Ag/AgCl) and 8.45 mA cm–2 (at 0.8 V). The unique hybrid structure with oxide–oxide interface in α-MnO2/Mn3O4/CeO2 is correlated to explain the mechanistic pathway. Multistate Mn(II/III/IV) and Ce(III/IV) synergistically influence in tendering superior activity with enhanced stability.

Chutia B. , Hussain N. , Puzari P. , Jampaiah D. , Bhargava S.K. , Matus E.V. , Ismagilov I.Z. , Kerzhentsev M. , Bharali P.
Unraveling the Role of CeO2 in Stabilization of Multivalent Mn Species on α-MnO2/Mn3O4/CeO2/C Surface for Enhanced Electrocatalysis
Energy and Fuels. 2021. V.35. N13. P.10756-10769. DOI: 10.1021/acs.energyfuels.1c00785 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Mar 12, 2021
Accepted:	May 13, 2021
Published online:	Jun 22, 2021
Published print:	Jul 1, 2021

Web of science:	WOS:000670646600033
Scopus:	2-s2.0-85110383139
Elibrary:	46954037
Chemical Abstracts:	2021:1358018
OpenAlex:	W3174433095

DB	Citing
Web of science	21
Scopus	22
Elibrary	18
OpenAlex	21