Supported PdZn nanoparticles for selective CO2 conversion, through the grafting of a heterobimetallic complex on CeZrOx

Controlling the stoichiometry of supported bimetallic nanoparticles is essential in many catalytic reactions, notably selective CO2 hydrogenation. Thus, a new strategy to ensure preferred (1:1) PdZn presented, involving deposition heterobimetallic precursor, [PdZn(μ-OOCMe)4]2 on CeZrOx support. After calcination and reduction, material contained mainly alloy, as revealed by powder XRD XAFS, further XPS, TEM-EDX, elemental analysis in-situ IR at low temperature using CO probe molecule. Moreover, minor phase oxidized Zn was determined XAFS. This PdZn/CeZrOx reduced catalyst combined with SAPO-34 form tandem system for conversion hydrocarbons. could readily convert H2 high (380 °C) into hydrocarbons 24% relative selectivity light (C2–C3: 82%) virtually no deactivation after 16 h stream. Controlled experiments were performed Pd/CeZrOx Zn/CeZrOx order gain supplementary insights this system: gave only methane under same conditions. The latter clearly shows that control formation has great impact production