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Volume 13
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10.3390/pr13123832
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Article

Boosting Hydrogen Generation with Platinum Nanoparticles Decorated on HTiNbO5 via NaBH4 Hydrolysis

by
Juliana Peña Gómez
1,
Geraldo Magela de Lima
1,*,
Veronica Evangelista Machado
2,
Noemí Cristina Silva de Souza
2,
José D. Ardisson
1,
Tiago Almeida Silva
2,
Fabrício Vieira de Andrade
3 and
Renata Pereira Lopes Moreira
2,*
1
Department of Chemistry, Universidade Federal de Minas Gerais—Belo Horizonte, Av. Presidente Antônio Carlos, 6627, Belo Horizonte 31270-901, MG, Brazil
2
Department of Chemistry, Universidade Federal de Viçosa (UFV), Av. Peter Henry Rolfs, s/n, Campus Universitário, Viçosa 36570-900, MG, Brazil
3
Department of Chemistry, Universidade Federal de Itajubá—Itabira, Rua Irmã Ivone Drumond, Distrito Industrial II, 200, Itabira 35903-087, MG, Brazil
*
Authors to whom correspondence should be addressed.
Processes 2025, 13(12), 3832; https://doi.org/10.3390/pr13123832
Submission received: 15 October 2025 / Revised: 7 November 2025 / Accepted: 24 November 2025 / Published: 27 November 2025
(This article belongs to the Section Chemical Processes and Systems)
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Abstract

In this study, we report the preparation of platinum nanoparticles (Pt NPs) deposited on HTiNbO5 and the application of the resultant material in the catalytic decomposition of sodium borohydride (NaBH4) to generate hydrogen. The starting material, KTiNbO5, was prepared through a solid-state process involving Nb2O5, K2CO3, and TiO2. The subsequent treatment with HNO3 resulted in the exchange of potassium by protons, rendering HTiNbO5. This material served as support for Pt nanoparticles (3.6 ± 0.7 nm), producing Pt NPs/HTiNbO5. All compounds were characterized using TGA, FTIR, XRD, Raman, SEM-EDS, and HRTEM. The influence of different factors on the reaction kinetics was evaluated, resulting in a hydrogen generation rate (HGR) of 22,790.18 mL min−1gcat−1 at 50 °C. The activation energy (41.83 kJ mol−1) was also determined. A mechanistic study with deuterated water revealed a kinetic isotopic effect (KIE) value of 1.27, indicating the dissociation of B-H from BH4− as the rate-determining step of the process. Furthermore, the reuse and durability of the material were evaluated, revealing a catalyst performance close to 100% over the 10 tested cycles. Therefore, it can be concluded that the synthesized material, Pt-nanoparticles dispersed on HTiNbO5, exhibits excellent performance and is suitable for hydrogen evolution from NaBH4.
Keywords: materials based on niobium; hydrogen storage; catalysis; metallic nanoparticles; alternative energy sources materials based on niobium; hydrogen storage; catalysis; metallic nanoparticles; alternative energy sources

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MDPI and ACS Style

Gómez, J.P.; de Lima, G.M.; Machado, V.E.; de Souza, N.C.S.; Ardisson, J.D.; Silva, T.A.; de Andrade, F.V.; Moreira, R.P.L. Boosting Hydrogen Generation with Platinum Nanoparticles Decorated on HTiNbO5 via NaBH4 Hydrolysis. Processes 2025, 13, 3832. https://doi.org/10.3390/pr13123832

AMA Style

Gómez JP, de Lima GM, Machado VE, de Souza NCS, Ardisson JD, Silva TA, de Andrade FV, Moreira RPL. Boosting Hydrogen Generation with Platinum Nanoparticles Decorated on HTiNbO5 via NaBH4 Hydrolysis. Processes. 2025; 13(12):3832. https://doi.org/10.3390/pr13123832

Chicago/Turabian Style

Gómez, Juliana Peña, Geraldo Magela de Lima, Veronica Evangelista Machado, Noemí Cristina Silva de Souza, José D. Ardisson, Tiago Almeida Silva, Fabrício Vieira de Andrade, and Renata Pereira Lopes Moreira. 2025. "Boosting Hydrogen Generation with Platinum Nanoparticles Decorated on HTiNbO5 via NaBH4 Hydrolysis" Processes 13, no. 12: 3832. https://doi.org/10.3390/pr13123832

APA Style

Gómez, J. P., de Lima, G. M., Machado, V. E., de Souza, N. C. S., Ardisson, J. D., Silva, T. A., de Andrade, F. V., & Moreira, R. P. L. (2025). Boosting Hydrogen Generation with Platinum Nanoparticles Decorated on HTiNbO5 via NaBH4 Hydrolysis. Processes, 13(12), 3832. https://doi.org/10.3390/pr13123832

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