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Cient\u00edfca)","award":["039.317\/2023"],"award-info":[{"award-number":["039.317\/2023"]}]},{"name":"Universidad de la Rep\u00fablica, Montevideo, Uruguay, and PEDECIBA\u2014F\u00edsica, Uruguay, and DI","award":["1220107"],"award-info":[{"award-number":["1220107"]}]},{"name":"Universidad de la Rep\u00fablica, Montevideo, Uruguay, and PEDECIBA\u2014F\u00edsica, Uruguay, and DI","award":["21210433"],"award-info":[{"award-number":["21210433"]}]},{"name":"Universidad de la Rep\u00fablica, Montevideo, Uruguay, and PEDECIBA\u2014F\u00edsica, Uruguay, and DI","award":["EQM 190016"],"award-info":[{"award-number":["EQM 190016"]}]},{"name":"Universidad de la Rep\u00fablica, Montevideo, Uruguay, and PEDECIBA\u2014F\u00edsica, Uruguay, and DI","award":["ICN 2021\u2013023"],"award-info":[{"award-number":["ICN 2021\u2013023"]}]},{"name":"Universidad de la Rep\u00fablica, Montevideo, Uruguay, and PEDECIBA\u2014F\u00edsica, Uruguay, and DI","award":["039.317\/2023"],"award-info":[{"award-number":["039.317\/2023"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Transition metal oxides are a great alternative to less expensive hydrogen evolution reaction (HER) catalysts. However, the lack of conductivity of these materials requires a conductor material to support them and improve the activity toward HER. On the other hand, carbon paste electrodes result in a versatile and cheap electrode with good activity and conductivity in electrocatalytic hydrogen production, especially when the carbonaceous material is agglomerated with ionic liquids. In the present work, an electrode composed of multi-walled carbon nanotubes (MWCNTs) and cobalt ferrite oxide (CoFe2O4) was prepared. These compounds were included on an electrode agglomerated with the ionic liquid N-octylpyridinium hexafluorophosphate (IL) to obtain the modified CoFe2O4\/MWCNTs\/IL nanocomposite electrode. To evaluate the behavior of each metal of the bimetallic oxide, this compound was compared to the behavior of MWCNTs\/IL where a single monometallic iron or cobalt oxides were included (i.e., \u03b1-Fe2O3\/MWCNTs\/IL and Co3O4\/MWCNTs\/IL). The synthesis of the oxides has been characterized by X-ray diffraction (XRD), RAMAN spectroscopy, and field emission scanning electronic microscopy (FE-SEM), corroborating the nanometric character and the structure of the compounds. The CoFe2O4\/MWCNTs\/IL nanocomposite system presents excellent electrocatalytic activity toward HER with an onset potential of \u2212270 mV vs. RHE, evidencing an increase in activity compared to monometallic oxides and exhibiting onset potentials of \u2212530 mV and \u2212540 mV for \u03b1-Fe2O3\/MWCNTs\/IL and Co3O4\/MWCNTs\/IL, respectively. Finally, the system studied presents excellent stability during the 5 h of electrolysis, producing 132 \u03bcmol cm\u22122 h\u22121 of hydrogen gas.<\/jats:p>","DOI":"10.3390\/ijms25137043","type":"journal-article","created":{"date-parts":[[2024,6,27]],"date-time":"2024-06-27T11:19:02Z","timestamp":1719487142000},"page":"7043","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["\u03b1-Fe2O3\/, Co3O4\/, and CoFe2O4\/MWCNTs\/Ionic Liquid Nanocomposites as High-Performance Electrocatalysts for the Electrocatalytic Hydrogen Evolution Reaction in a Neutral Medium"],"prefix":"10.3390","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-7426-1815","authenticated-orcid":false,"given":"Jos\u00e9","family":"Ibarra","sequence":"first","affiliation":[{"name":"Departamento de Qu\u00edmica Inorg\u00e1nica, Facultad de Qu\u00edmica, Pontificia Universidad Cat\u00f3lica de Chile, Av. Vicu\u00f1a Mackenna 4860, Casilla 306, Correo 22, Santiago 8331150, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1134-4469","authenticated-orcid":false,"given":"Mar\u00eda Jesus","family":"Aguirre","sequence":"additional","affiliation":[{"name":"Millennium Institute on Green Ammonia as Energy Vector (MIGA), Av. Vicu\u00f1a Mackenna 4860, Macul, Santiago 7820436, Chile"},{"name":"Departamento Qu\u00edmica de los Materiales, Facultad de Qu\u00edmica y Biologia, Universidad de Santiago de Chile, Av. B O\u2019Higgins 3363, Estaci\u00f3n Central, Santiago 9170022, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0315-6660","authenticated-orcid":false,"given":"Rodrigo","family":"del R\u00edo","sequence":"additional","affiliation":[{"name":"Departamento de Qu\u00edmica Inorg\u00e1nica, Facultad de Qu\u00edmica, Pontificia Universidad Cat\u00f3lica de Chile, Av. Vicu\u00f1a Mackenna 4860, Casilla 306, Correo 22, Santiago 8331150, Chile"},{"name":"Millennium Institute on Green Ammonia as Energy Vector (MIGA), Av. Vicu\u00f1a Mackenna 4860, Macul, Santiago 7820436, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2612-5413","authenticated-orcid":false,"given":"Rodrigo","family":"Henriquez","sequence":"additional","affiliation":[{"name":"Instituto de Qu\u00edmica, Facultad de Ciencias, Pontificia Universidad Cat\u00f3lica de Valpara\u00edso, Av. Brasil 2950, Valpara\u00edso 2362807, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1650-7677","authenticated-orcid":false,"given":"Ricardo","family":"Faccio","sequence":"additional","affiliation":[{"name":"\u00c1rea F\u00edsica & Centro NanoMat, DETEMA, Facultad de Qu\u00edmica, Universidad de la Rep\u00fablica, Av. Gral. Flores 2124, CC 1157, Montevideo 11800, Uruguay"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Enrique A.","family":"Dalchiele","sequence":"additional","affiliation":[{"name":"Instituto de F\u00edsica, Facultad de Ingenier\u00eda, Universidad de la Rep\u00fablica, Herrera y Reissig 565, C.C. 30, Montevideo 11000, Uruguay"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roxana","family":"Arce","sequence":"additional","affiliation":[{"name":"Millennium Institute on Green Ammonia as Energy Vector (MIGA), Av. Vicu\u00f1a Mackenna 4860, Macul, Santiago 7820436, Chile"},{"name":"Departamento de Ciencias Qu\u00edmicas, Facultad de Ciencias Exactas, Universidad Andr\u00e9s Bello, Av. Rep\u00fablica 275, Santiago 8370146, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6217-4730","authenticated-orcid":false,"given":"Galo","family":"Ram\u00edrez","sequence":"additional","affiliation":[{"name":"Departamento de Qu\u00edmica Inorg\u00e1nica, Facultad de Qu\u00edmica, Pontificia Universidad Cat\u00f3lica de Chile, Av. Vicu\u00f1a Mackenna 4860, Casilla 306, Correo 22, Santiago 8331150, Chile"},{"name":"Millennium Institute on Green Ammonia as Energy Vector (MIGA), Av. Vicu\u00f1a Mackenna 4860, Macul, Santiago 7820436, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,6,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"102676","DOI":"10.1016\/j.est.2021.102676","article-title":"A Study on Hydrogen, the Clean Energy of the Future: Hydrogen Storage Methods","volume":"40","author":"Tarhan","year":"2021","journal-title":"J. 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