2026-04-17T03:34:50Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1793702025-12-04T20:57:07Zcom_2072_1057col_2072_478796col_2072_478917

00925njm 22002777a 4500 dc Golovanova, Viktoria author Spadaro, Maria Chiara author Arbiol, Jordi author Golovanov, Viacheslav author Rantala, Tapio T. author Andreu Arbella, Teresa author Morante i Lleonart, Joan Ramon author 2021-07-23T10:12:34Z 2021-07-23T10:12:34Z 2021-02-23 2021-07-23T10:12:34Z Utilization of the renewable energy sources is one of the main challenges in the state-of-the-art technologies for CO2 recycling. Here we have taken advantage of the solar light harvesting in the thermocatalytic approach to carbon dioxide methanation. The large-surface-area Ni/CeO2 catalyst produced by a scalable low-cost method was characterized and tested in the dark and under solar light irradiation conditions. Light-assisted CO2 con-version experiments as well as in-situ DRIFT spectrometry, performed at different illumination intensities, have revealed a dual effect of the incident photons on the catalytic properties of the two-component Ni/CeO2 catalyst. On the one hand, absorbed photons induce a localized surface plasmon resonance in the Ni nanoparticles fol-lowed by dissipation of the heat to the oxide matrix. On the other hand, the illumination activates the photo-catalytic properties of the CeO2 support, which leads to an increase in the concentration of the intermediates being precursor for methane production. Analysis of the methane production at different temperatures and illumination conditions has shown that the methanation reaction in our case is controlled by a photothermally- activated process. The used approach has allowed us to increase the reaction rate up to 2.4 times and conse-quently to decrease the power consumption by 20 % under solar illumination, thus replacing the conventional thermal activation of the reaction with a green energy source. Absorció de calor Níquel Hidrogenació Nanopartícules Diòxid de carboni Heat absorption Nickel Hydrogenation Nanoparticles Carbon dioxide Effects of solar irradiation on thermally driven CO2 methanation using Ni/CeO2-based catalyst