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On the role of bismuth as modifier in AuPdBi catalysts: Effects on liquid-phase oxidation and hydrogenation reactions

DOI: 10.1016/j.catcom.2021.106340 DOI Help

Authors: Sebastiano Campisi (Università degli Studi di Milano) , Sofia Capelli (Università degli Studi di Milano) , Michele Ferri (Università degli Studi di Milano) , Alberto Villa (Università degli Studi di Milano) , Ellie Dann (University College London) , Austin Wade (Thermo Fisher Scientific) , Peter P. Wells (University of Southampton; UK Catalysis Hub; Diamond Light Source) , Nikolaos Dimitratos (ALMA MATER STUDIORUM Università di Bologna)
Co-authored by industrial partner: Yes

Type: Journal Paper
Journal: Catalysis Communications , VOL 158

State: Published (Approved)
Published: October 2021
Diamond Proposal Number(s): 8071

Open Access Open Access

Abstract: There is much about the action of bismuth within heterogeneous catalysis that still require a deeper understanding. We observed that, when Bi was added to AuPd bimetallic nanoparticles (NPs) supported on activated carbon, Bi affected the activity and significantly alters the selectivity in two model liquid phase reactions, namely the oxidation of cinnamyl alcohol and the hydrogenation of cinnamaldehyde. A combination of transmission electron microscopy and X-ray absorption spectroscopy provided a detailed characterization of trimetallic AuPdBi systems. We propose that the introduction of bismuth on AuPd NPs results in a partial blockage of most active sites, limiting the occurrence of consecutive reactions.

Journal Keywords: Nanoalloys; EXAFS; Heterogeneous catalysis; Promoter

Subject Areas: Chemistry


Instruments: B18-Core EXAFS

Documents:
1-s2.0-S1566736721000637-main.pdf

Discipline Tags:

Physical Chemistry Catalysis Chemistry

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS)