Information from the abstract
The sustainable conversion of carbon dioxide (CO 2 )into value-added chemicals remains a major challenge, particularly for the selective formation of C 1 –C 3 alcohols. Herein, bimetallic copper phyllosilicate catalysts (1%X-20%CuPS, X = Zn, Mg, Pt) were developed and systematically evaluated for the liquid-phase hydrogenation of CO 2 to alcohols compared with monometallic 20%CuPS as a benchmark. Among these catalysts, 1%Mg-20%CuPS exhibited the highest activity, excellent stability, and good reusability, highlighting the beneficial role of earth-abundant metal promotion. The enhanced performance is attributed to increased surface basicity and stronger CO 2 adsorption, which facilitated the formation and stabilization of formate intermediates. Concurrently, in situ reduction of Cu + /Cu 0 sites promotes efficient H 2 dissociation and subsequent hydrogenation steps. A high surface Mg/Si ratio further stabilizes CO-derived intermediates and promotes CO-mediated C–C coupling, favoring C 2 + alcohol formation. Zn incorporation induced similar but less pronounced effects, whereas Pt altered the reaction network, leading to increased byproduct formation and lower alcohol selectivity. After 24 h, the total alcohol selectivity followed the order 1%Mg-20%CuPS (98%) > 1%Zn-20%CuPS (88%) > 1%Pt-20%CuPS (73%) > 20%CuPS (67%). Overall, second metal modification effectively tunes catalyst properties and reaction pathways, with Mg emerging as a sustainable and industrially viable promoter for CO 2 valorization to C 1 –C 3 alcohols.
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Related topics: Catalysts for Methane Reforming · Carbon dioxide utilization in catalysis · Catalysis for Biomass Conversion
Thai researcher and institutional participation
Suttiporn Poson · Thapong Teerawatananond · Tanyarat Shoosri · Joongjai Panpranot · Patcharaporn Weerachawanasak · King Mongkut's Institute of Technology Ladkrabang · Chulalongkorn University
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