Unraveling the Role of CeO2 in Stabilization of Multivalent Mn Species on α-MnO2/Mn3O4/CeO2/C Surface for Enhanced Electrocatalysis | Sciact - CRIS-система Института катализа

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

Журнал

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

Вых. Данные

Год: 2021, Том: 35, Номер: 13, Страницы: 10756-10769 Страниц : 14 DOI: 10.1021/acs.energyfuels.1c00785

Ключевые слова

Redox reactions, Carbon, Electrodes, Catalysts, Transition metals

Авторы

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

Организации

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

Информация о финансировании (2)

1	Российский фонд фундаментальных исследований	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 OpenAlex CAPlus

Поступила в редакцию:	12 мар. 2021 г.
Принята к публикации:	13 мая 2021 г.
Опубликована online:	22 июн. 2021 г.
Опубликована в печати:	1 июл. 2021 г.

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

≡ Web of science	30	Сбор данных от 20.02.2026
≡ Scopus	30	Сбор данных от 15.02.2026
≡ РИНЦ	25	Сбор данных от 15.02.2026
≡ OpenAlex	31	Сбор данных от 15.02.2026