Electrocatalysis of Oxygen on Bifunctional Nickel‐Cobaltite Spinel
| Autor: | Alessandra Di Blasi, Vincenzo Antonucci, Vincenzo Baglio, Cinthia Alegre, C. Busacca, Antonino S. Aricò, Orazio Di Blasi |
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| Přispěvatelé: | Governo Italiano, Alegre Gresa, Cinthia, Di Blasi, Alessandra, Aricò, Antonino Salvatore, Antonucci, Vincenzo, Baglio, Vincenzo, Alegre Gresa, Cinthia [0000-0003-1221-6311], Di Blasi, Alessandra [0000-0002-2847-3075], Aricò, Antonino Salvatore [0000-0001-8975-6215], Antonucci, Vincenzo [0000-0001-6090-3939], Baglio, Vincenzo [0000-0002-0541-7169] |
| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
Materials science Oxygen reduction Carbon nanofiber Bifunctional oxygen electrodes Inorganic chemistry Spinel Oxygen evolution Carbon nanofibres chemistry.chemical_element engineering.material Electrocatalyst Oxygen Catalysis Cobaltite Nickel chemistry.chemical_compound chemistry carbon nanofibers Electrochemistry engineering Bifunctional |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname ChemElectroChem 7 (2020): 124–130. doi:10.1002/celc.201901584 info:cnr-pdr/source/autori:Alegre, Cinthia; Busacca, Concetta; Di Blasi, Alessandra; Di Blasi, Orazio; Arico, Antonino S.; Antonucci, Vincenzo; Baglio, Vincenzo/titolo:Electrocatalysis of Oxygen on Bifunctional Nickel-Cobaltite Spinel/doi:10.1002%2Fcelc.201901584/rivista:ChemElectroChem/anno:2020/pagina_da:124/pagina_a:130/intervallo_pagine:124–130/volume:7 |
| ISSN: | 2196-0216 |
| DOI: | 10.1002/celc.201901584 |
| Popis: | 7 Figures, 2 Tables.-- This article also appears in: Giornate dell’Elettrochimica Italiana (GEI 2019). Transition‐metal‐based materials are among the most active and durable catalysts for the effective electrocatalysis of oxygen‐related reactions. Herein, we present a study on bifunctional catalysts as air electrodes aimed at metal‐air batteries based on nickel and cobalt spinel (NiCo2O4) supported on electrospun carbon nanofibers. The physicochemical features of these transition‐metal‐based catalysts are essential for the understanding of their electrochemical activity. Results show that the major presence of oxidized Ni and Co species (Ni3+ and Co3+) produces higher activity for the oxygen evolution reaction (OER), whereas lower oxidation states of the metals (Ni2+, Co2+, Ni0 and Co0) together with the presence of N‐doped carbon lead to enhanced oxygen reduction reaction (ORR) performance. This study highlights the importance of designing catalysts in terms of crystallographic structure and proper oxidation states of the elements for maximizing their performance. The research leading to these results has received funding from the “Accordo di Programma CNR‐MiSE, Gruppo tematico Sistema Elettrico Nazionale e Progetto: Sistemi elettrochimici per l′accumulo di energia”. |
| Databáze: | OpenAIRE |
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