Elucidating the Role of Oxide–Oxide/Carbon Interfaces of CuOx–CeO2/C in Boosting Electrocatalytic Performance | Sciact - CRIS-система Института катализа

Elucidating the Role of Oxide–Oxide/Carbon Interfaces of CuOx–CeO2/C in Boosting Electrocatalytic Performance Научная публикация

Журнал

Langmuir
ISSN: 0743-7463 , E-ISSN: 1520-5827

Вых. Данные

Год: 2020, Том: 36, Номер: 49, Страницы: 15141-15152 Страниц : 12 DOI: 10.1021/acs.langmuir.0c02754

Ключевые слова

Carbon; Cerium oxide; Durability; Electrocatalysts; Electrolytic reduction; Oxygen evolution reaction; Oxygen reduction reaction

Авторы

Goswami Chiranjita ¹ , Yamada Yusuke ² , Matus Ekaterina V. ³ , Ismagilov Ilyas Z. ³ , Kerzhentsev Mikhail ³ , Bharali Pankaj ¹

Организации

1	Department of Chemical Sciences, Tezpur University, Tezpur 784 028, Assam, India
2	Department of Applied Chemistry & Bioengineering, Graduate School of Engineering, Osaka City University, Osaka 558-8585, Japan
3	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia

Информация о финансировании (1)

Российский фонд фундаментальных исследований

18-53-45012

Herein, we report the synthesis and bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activities of a CuOx–CeO2/C electrocatalyst (EC) with rich oxide–oxide and oxide–carbon interfaces. It not only demonstrates a smaller Tafel slope (65 mV dec–1) and higher limiting current density (−5.03 mA cm–2) but also exhibits an onset potential (−0.10 V vs Ag/AgCl) comparable to that of benchmark Pt/C. Besides undergoing the favorable direct four-electron ORR pathway, it unveils a loss of 23% of its initial current after 6 h of a stability test and a negative shift of 4 mV in the half-wave potential after the accelerated durability test compared to the corresponding current loss of 28% and negative shift of 20 mV for Pt/C. It also reveals remarkable OER activity in an alkaline medium with a low onset potential (0.20 V) and a smaller Tafel slope (177 mV dec–1). The bifunctional ORR/OER activity of CuOx–CeO2/C EC can be ascribed to the synergistic effects, its unique structure with enriched oxygen vacancies owing to the presence of Ce4+/Ce3+, robust oxide–oxide and oxide–carbon heterointerfaces, and homogeneous dispersion of oxides over the carbon bed, which facilitates faster electronic conduction.

Goswami C. , Yamada Y. , Matus E.V. , Ismagilov I.Z. , Kerzhentsev M. , Bharali P.
Elucidating the Role of Oxide–Oxide/Carbon Interfaces of CuOx–CeO2/C in Boosting Electrocatalytic Performance
Langmuir. 2020. V.36. N49. P.15141-15152. DOI: 10.1021/acs.langmuir.0c02754 WOS Scopus РИНЦ CAPlus PMID OpenAlex

Поступила в редакцию:	17 сент. 2020 г.
Принята к публикации:	14 нояб. 2020 г.
Опубликована online:	30 нояб. 2020 г.
Опубликована в печати:	15 дек. 2020 г.

Web of science:	WOS:000600153800024
Scopus:	2-s2.0-85097847343
РИНЦ:	45073051
Chemical Abstracts:	2020:2440576
PMID (PubMed):	33256414
OpenAlex:	W3109110581

БД	Цитирований
Scopus	31
Web of science	29
РИНЦ	28
OpenAlex	29