Identifying low-coverage surface species on supported noble metal nanoparticle catalysts by DNP-NMR

Robert L Johnson; Frédéric A Perras; Takeshi Kobayashi; Thomas J Schwartz; James A Dumesic; Brent H Shanks; Marek Pruski

doi:10.1039/c5cc06788j

Identifying low-coverage surface species on supported noble metal nanoparticle catalysts by DNP-NMR

Chem Commun (Camb). 2016 Jan 31;52(9):1859-62. doi: 10.1039/c5cc06788j.

Authors

Robert L Johnson¹, Frédéric A Perras², Takeshi Kobayashi², Thomas J Schwartz³, James A Dumesic³, Brent H Shanks¹, Marek Pruski⁴

Affiliations

¹ Department of Chemical and Biological Engineering, Iowa State University, Ames, IA 50011-2230, USA.
² US DOE, Ames Laboratory, Ames, IA 50011-3020, USA.
³ Department of Chemical and Biological Engineering, University of Wisconsin, Madison, WI 53706, USA.
⁴ US DOE, Ames Laboratory, Ames, IA 50011-3020, USA and Department of Chemistry, Iowa State University, Ames, IA 50011-3020, USA. [email protected].

PMID: 26675287
DOI: 10.1039/c5cc06788j

Abstract

DNP-NMR spectroscopy has been applied to enhance the signal for organic molecules adsorbed on γ-Al2O3-supported Pd nanoparticle catalysts. By offering >2500-fold time savings, the technique enabled the observation of (13)C-(13)C cross-peaks for low coverage species, which were assigned to products from oxidative degradation of methionine adsorbed on the nanoparticle surface.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Aluminum Oxide / chemistry
Catalysis
Magnetic Resonance Spectroscopy / methods*
Metal Nanoparticles*
Oxidation-Reduction
Surface Properties

Substances

Aluminum Oxide