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

Author(s)

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

• Document type: Journal article
• Source: CATALYSIS TODAY; v. 444, p. 11-pg., 2024-08-29.

Abstract

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)

• FAPESP's process: 18/19251-7 - Multi-User Equipment approved in grant 2017/50332-0: ASAP 2020 plus surface area analyzer, volume and pore area
• Grantee: Ivana Conte Cosentino
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 19/15110-2 - Development of core-shell catalysts for ethanol steam reforming reaction
• Grantee: Tamara Siqueira Moraes
• Support Opportunities: Scholarships in Brazil - Post-Doctoral