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Indexed by:期刊论文

Date of Publication:2021-01-31

Journal:CATALYSIS COMMUNICATIONS

Volume:118

Page Number:10-14

ISSN No.:1566-7367

Key Words:CO2 hydrogenation; Methanol; Pd-Cu bimetallic catalyst; Pd-Cu alloy formation; Chemical composition

Abstract:A series of Pd-Cu bimetallic catalysts with a wide range of total loadings (i.e., 2.4-18.7 wt%, Pd, (Pd + Cu) = 0.34 at at(-1)) were prepared and evaluated for CO2 hydrogenation to CH3OH (Methanol). A key: observation is the retention of bimetallic promotion of CH3OH at lower metal loadings. Pd-Cu(2.4)/SiO2, whicl contains the lowest metal loading, yields similar to 1.6 x more CH3OH than the commercial Cu-ZnO-Al2O3 catalyst with respect to metal-based space-time yield (STY) at 523 K and 4.1 MPa. However, an enhancement in CO production is realized. Combined with the characterization results, the size effect-surface alloy composition-catalytic performance relationship was discussed. This work provides insights in designing cost-effective Pd-Cu catalyst with lower metal loadings for CH3OH synthesis via CO2 hydrogenation.