Author, as appears in the article.: Ruzzi P; Salusso D; Baravaglio M; Szeto KC; De Mallmann A; Jiménez LG; Godard C; Benayad A; Morandi S; Bordiga S; Taoufik M
Department: Química Física i Inorgànica
URV's Author/s: Godard, Cyril
Keywords: X-ray-absorption Surface organometallic chemistry Palladium Light alkanes In-situ ir Hydrocarbon production zn value-added products palladium methanol synthesis light alka n e s in-situ ir hydrogenation hydrocarbon production cu/zno/zro2 catalysts chemical-properties ceria carbon-dioxide adsorption
Abstract: Controlling the stoichiometry of supported bimetallic nanoparticles is essential in many catalytic reactions, notably selective CO2 hydrogenation. Thus, a new strategy to ensure the preferred stoichiometry (1:1) of supported bimetallic PdZn nanoparticles is presented, involving the deposition of a heterobimetallic precursor, [PdZn(μ-OOCMe)4]2 on a CeZrOx support. After calcination and reduction, the material contained mainly a PdZn alloy, as revealed by powder XRD and XAFS, and further supported by XPS, TEM-EDX, elemental analysis and in-situ IR at low temperature using CO as probe molecule. Moreover, a minor phase of oxidized Zn was determined by XAFS. This PdZn/CeZrOx reduced catalyst was combined with SAPO-34 to form a tandem catalytic system for CO2 conversion to hydrocarbons. This system could readily convert CO2 and H2 at high temperature (380 °C) into hydrocarbons with a conversion of 24% and high relative selectivity in light hydrocarbons (C2–C3: 82%) with virtually no deactivation of the catalyst after 16 h on stream. Controlled experiments were performed with Pd/CeZrOx and Zn/CeZrOx in order to gain supplementary insights on this system: Pd/CeZrOx gave only methane and Zn/CeZrOx gave mainly CO under the same conditions. The latter clearly shows that the control of the formation of PdZn phase has great impact for the selective production of hydrocarbons.
Thematic Areas: Química Process chemistry and technology Medicina i Materiais Interdisciplinar Farmacia Environmental sciences Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Chemistry, physical Catalysis Biotecnología Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: cyril.godard@urv.cat
Author identifier: 0000-0001-5762-4904
Record's date: 2024-09-07
Papper version: info:eu-repo/semantics/publishedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Applied Catalysis A-General. 635
APA: Ruzzi P; Salusso D; Baravaglio M; Szeto KC; De Mallmann A; Jiménez LG; Godard C; Benayad A; Morandi S; Bordiga S; Taoufik M (2022). Supported PdZn nanoparticles for selective CO2 conversion, through the grafting of a heterobimetallic complex on CeZrOx. Applied Catalysis A-General, 635(), -. DOI: 10.1016/j.apcata.2022.118568
Entity: Universitat Rovira i Virgili
Journal publication year: 2022
Publication Type: Journal Publications
Repositori URV