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Magnetically Recovered Co and Co@Pt Catalysts Prepared by Galvanic Replacement on Aluminum Powder for Hydrolysis of Sodium Borohydride

Magnetically recovered Co and Co@Pt catalysts for H(2) generation during NaBH(4) hydrolysis were successfully synthesized by optimizing the conditions of galvanic replacement method. Commercial aluminum particles with an average size of 80 µm were used as a template for the synthesis of hollow shell...

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Autores principales: Ozerova, Anna M., Skobelkina, Anastasia A., Simagina, Valentina I., Komova, Oksana V., Prosvirin, Igor P., Bulavchenko, Olga A., Lipatnikova, Inna L., Netskina, Olga V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9103126/
https://www.ncbi.nlm.nih.gov/pubmed/35591346
http://dx.doi.org/10.3390/ma15093010
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author Ozerova, Anna M.
Skobelkina, Anastasia A.
Simagina, Valentina I.
Komova, Oksana V.
Prosvirin, Igor P.
Bulavchenko, Olga A.
Lipatnikova, Inna L.
Netskina, Olga V.
author_facet Ozerova, Anna M.
Skobelkina, Anastasia A.
Simagina, Valentina I.
Komova, Oksana V.
Prosvirin, Igor P.
Bulavchenko, Olga A.
Lipatnikova, Inna L.
Netskina, Olga V.
author_sort Ozerova, Anna M.
collection PubMed
description Magnetically recovered Co and Co@Pt catalysts for H(2) generation during NaBH(4) hydrolysis were successfully synthesized by optimizing the conditions of galvanic replacement method. Commercial aluminum particles with an average size of 80 µm were used as a template for the synthesis of hollow shells of metallic cobalt. Prepared Co(0) was also subjected to galvanic replacement reaction to deposit a Pt layer. X-ray diffraction analysis, X-ray photoelectron spectroscopy, scanning electron microscopy, and elemental analysis were used to investigate catalysts at each stage of their synthesis and after catalytic tests. It was established that Co(0) hollow microshells show a high hydrogen-generation rate of 1560 mL·min(−1)·g(cat)(−1) at 40 °C, comparable to that of many magnetic cobalt nanocatalysts. The modification of their surface by platinum (up to 19 at% Pt) linearly increases the catalytic activity up to 5.2 times. The catalysts prepared by the galvanic replacement method are highly stable during cycling. Thus, after recycling and washing off the resulting borate layer, the Co@Pt catalyst with a minimum Pt loading (0.2 at%) exhibits an increase in activity of 34% compared to the initial value. The study shows the activation of the catalyst in the reaction medium with the formation of cobalt–boron-containing active phases.
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spelling pubmed-91031262022-05-14 Magnetically Recovered Co and Co@Pt Catalysts Prepared by Galvanic Replacement on Aluminum Powder for Hydrolysis of Sodium Borohydride Ozerova, Anna M. Skobelkina, Anastasia A. Simagina, Valentina I. Komova, Oksana V. Prosvirin, Igor P. Bulavchenko, Olga A. Lipatnikova, Inna L. Netskina, Olga V. Materials (Basel) Article Magnetically recovered Co and Co@Pt catalysts for H(2) generation during NaBH(4) hydrolysis were successfully synthesized by optimizing the conditions of galvanic replacement method. Commercial aluminum particles with an average size of 80 µm were used as a template for the synthesis of hollow shells of metallic cobalt. Prepared Co(0) was also subjected to galvanic replacement reaction to deposit a Pt layer. X-ray diffraction analysis, X-ray photoelectron spectroscopy, scanning electron microscopy, and elemental analysis were used to investigate catalysts at each stage of their synthesis and after catalytic tests. It was established that Co(0) hollow microshells show a high hydrogen-generation rate of 1560 mL·min(−1)·g(cat)(−1) at 40 °C, comparable to that of many magnetic cobalt nanocatalysts. The modification of their surface by platinum (up to 19 at% Pt) linearly increases the catalytic activity up to 5.2 times. The catalysts prepared by the galvanic replacement method are highly stable during cycling. Thus, after recycling and washing off the resulting borate layer, the Co@Pt catalyst with a minimum Pt loading (0.2 at%) exhibits an increase in activity of 34% compared to the initial value. The study shows the activation of the catalyst in the reaction medium with the formation of cobalt–boron-containing active phases. MDPI 2022-04-21 /pmc/articles/PMC9103126/ /pubmed/35591346 http://dx.doi.org/10.3390/ma15093010 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ozerova, Anna M.
Skobelkina, Anastasia A.
Simagina, Valentina I.
Komova, Oksana V.
Prosvirin, Igor P.
Bulavchenko, Olga A.
Lipatnikova, Inna L.
Netskina, Olga V.
Magnetically Recovered Co and Co@Pt Catalysts Prepared by Galvanic Replacement on Aluminum Powder for Hydrolysis of Sodium Borohydride
title Magnetically Recovered Co and Co@Pt Catalysts Prepared by Galvanic Replacement on Aluminum Powder for Hydrolysis of Sodium Borohydride
title_full Magnetically Recovered Co and Co@Pt Catalysts Prepared by Galvanic Replacement on Aluminum Powder for Hydrolysis of Sodium Borohydride
title_fullStr Magnetically Recovered Co and Co@Pt Catalysts Prepared by Galvanic Replacement on Aluminum Powder for Hydrolysis of Sodium Borohydride
title_full_unstemmed Magnetically Recovered Co and Co@Pt Catalysts Prepared by Galvanic Replacement on Aluminum Powder for Hydrolysis of Sodium Borohydride
title_short Magnetically Recovered Co and Co@Pt Catalysts Prepared by Galvanic Replacement on Aluminum Powder for Hydrolysis of Sodium Borohydride
title_sort magnetically recovered co and co@pt catalysts prepared by galvanic replacement on aluminum powder for hydrolysis of sodium borohydride
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9103126/
https://www.ncbi.nlm.nih.gov/pubmed/35591346
http://dx.doi.org/10.3390/ma15093010
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