Exsolution of Ni nanoparticles from La_0.4Sr_0.4Ti_0.8Ni_0.2O_3-δ perovskite for ethanol steam reforming

Autor(es)

Piazzolla, Fernando ; Moraes, Tamara S. ; Figueiredo, Stefany S. ; de Paula, Dryade F. ; Veiga, Emerson L. dos Santos ; Rodella, Cristiane B. ; Fonseca, Fabio C.

• Tipo de documento: Artigo Científico
• Fonte: CATALYSIS TODAY; v. 444, p. 11-pg., 2024-08-29.

Resumo

The escalating increase in global temperatures has highlighted hydrogen (H2) as a promising alternative clean energy carrier. Hydrogen can be derived from biofuels such as bioethanol, offering an efficient liquid carrier that addresses availability, storage, and distribution issues hindering a widespread use of H2. This study reports on the synthesis of La0.4Sr0.4Ti0.8Ni0.2O3-delta catalysts followed by the exsolution process to enhance catalytic activity for H2 production via ethanol steam reforming (ESR) reaction. Single-phase compounds with exsolved metallic nanoparticles were successfully tested for ESR, revealing an ethanol conversion rate of 40 % and over 40 % H2 production for the catalyst reduced at 1000 degrees C for 12 hours. Stability tests demonstrated the catalyst's capacity for regeneration in both water vapor and N2. The experimental data demonstrate that exsolving metallic nanoparticles is a viable strategy for producing a stable catalyst for the ESR reaction. (AU)

• Processo FAPESP: 18/19251-7 - Equipamento Multiusuário (EMU) concedido no processo 2017/50332-0: ASAP 2020 Plus analisador de área superficial, volume e área de poros
• Beneficiário: Ivana Conte Cosentino
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 19/15110-2 - Desenvolvimento de catalisadores core-shell para reação de reforma a vapor do etanol
• Beneficiário: Tamara Siqueira Moraes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado