Title

‘Surface Contrast’ NMR reveals non‐innocent role of support in Pd/CeO2 catalyzed phenol hydrogenation

Publication Date

5-8-2020

Department

Chemistry; Biochemistry, Biophysics and Molecular Biology, Roy J. Carver Department of; Ames Laboratory

Campus Units

Biochemistry, Biophysics and Molecular Biology, Roy J. Carver Department of, Chemistry, Ames Laboratory

OSTI ID+

1630915

Report Number

IS-J 10215

DOI

10.1002/cctc.202000608

Journal Title

ChemCatChem

Abstract

Ceria (CeO 2 )‐supported metals are widely used as catalysts because of their exceptional redox properties. Here, we use surface contrast NMR methods to investigate the hydrogenation of phenol by Pd supported on ceria nanoparticles. We show that the rigid and planar binding of phenol to Pd is mediated by a weak and highly mobile association of the small molecule to ceria. Interestingly, while addition of phosphate to the mixture does not perturb the adsorption of phenol on Pd, it destabilizes its interaction with ceria and proportionally decreases the rate of catalytic conversion. Our data provide strong experimental evidence that weak interactions between adsorbate and ceria are catalytically competent, and explain the exceptional performance of Pd/CeO 2 for reductive conversions under mild reaction conditions.

DOE Contract Number(s)

AC02-07CH11358

Language

en

Publisher

Iowa State University Digital Repository, Ames IA (United States)

2020-VendittiVincenzo-SurfaceContrast-SI.pdf (2403 kB)
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