| Texto completo | |
| Autor(es): |
Lima, Irlan S.
;
Pereira, Rafael S.
;
Ritter, Timothy G.
;
Shahbazian-Yassar, Reza
;
Goncalves, Josue M.
;
Angnes, Lucio
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CATALYSTS; v. 13, n. 10, p. 14-pg., 2023-10-01. |
| Resumo | |
In response to the requirement for alternative energy conversion and storage methods, metal-glycerolates (MG) and their analogs are considered promising classes of electrode material that can be synthesized in various designs. Recently, the concept of high-entropy configuration and multimetallic systems has gained attention in the field of electrocatalysis. In fact, the presence of five or more metals in a single-phase material can produce unique and unexpected properties. Thus, it becomes crucial to explore different metal combinations and evaluate their synergistic interaction as a result of these combinations. Therefore, in this work, a scalable solvothermal method was used to synthesize a high-entropy glycerolate (HEG) containing Ni, Zn, Mn, Mg, and Co ions (HEG) and their respective sub-systems such as NiG, NiMnG, and NiMnZnG. The SEM-EDS images showed the excellent distribution of the metal cations in the obtained microspheres. Surprisingly, our experiments demonstrated that even in reaching a single-phase HEG, the oxygen evolution reaction (OER) performance measured in 1 M KOH electrolyte did not surpass the benefit effect observed in the NiG-based carbon paste with an overpotential of 310 mV (@10 mA cm-2), against 341 mV (@10 mA cm-2) of HEG. Moreover, the NiG shows good stability toward OER even after 24 h, which is attributed to the NiOOH active phase generated during the electrochemical cycling. (AU) | |
| Processo FAPESP: | 20/06176-7 - Estudo dos materiais de eletrodos de hidróxido lamelares com microscopia eletrônica de transmissão in situ |
| Beneficiário: | Josué Martins Gonçalves |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 18/16896-7 - Desenvolvimento de sensores amperométricos e impedimétricos baseados em hidróxidos duplos de níquel e Vanádio (alfa-NixV1-x(OH)2) e seus nanocompósitos com grafite expansível/grafenos |
| Beneficiário: | Josué Martins Gonçalves |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 22/04127-4 - Alfa-hidróxidos metálicos vs. glicerolatos metálicos: síntese, propriedades e aplicações |
| Beneficiário: | Irlan dos Santos Lima |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 17/13137-5 - Formação e propriedades de hemiésteres do ácido carbônico em meio aquoso |
| Beneficiário: | Claudimir Lucio Do Lago |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |