Elucidating the Role of Oxide–Oxide/Carbon Interfaces of CuOx–CeO2/C in Boosting Electrocatalytic Performance Full article
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Langmuir
ISSN: 0743-7463 , E-ISSN: 1520-5827 |
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| Output data | Year: 2020, Volume: 36, Number: 49, Pages: 15141-15152 Pages count : 12 DOI: 10.1021/acs.langmuir.0c02754 | ||||||
| Tags | Carbon; Cerium oxide; Durability; Electrocatalysts; Electrolytic reduction; Oxygen evolution reaction; Oxygen reduction reaction | ||||||
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| Affiliations |
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Funding (1)
| 1 | Russian Foundation for Basic Research | 18-53-45012 |
Abstract:
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.
Cite:
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 AN PMID OpenAlex
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 AN PMID OpenAlex
Dates:
| Submitted: | Sep 17, 2020 |
| Accepted: | Nov 14, 2020 |
| Published online: | Nov 30, 2020 |
| Published print: | Dec 15, 2020 |
Identifiers:
| Web of science: | WOS:000600153800024 |
| Scopus: | 2-s2.0-85097847343 |
| Elibrary: | 45073051 |
| Chemical Abstracts: | 2020:2440576 |
| PMID: | 33256414 |
| OpenAlex: | W3109110581 |