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Instruments / Technical Area	Publication Details	Published	Actions
I06-Nanoscience	Influence of support morphology on the bonding of molecules to nanoparticles Chi Ming Yim , Chi Lun Pang , Diego R. Hermoso , Coinneach Dover , Chris Muryn , Francesco Maccherozzi , Sarnjeet Dhesi , Rubén Pérez , Geoff Thornton Proceedings Of The National Academy Of Sciences DOI: 10.1073/pnas.1506939112 PMID: 26080433 Diamond Proposal Number(s): [6485] Show Abstract ▼ Abstract: Supported metal nanoparticles form the basis of heterogeneous catalysts. Above a certain nanoparticle size, it is generally assumed that adsorbates bond in an identical fashion as on a semiinfinite crystal. This assumption has allowed the database on metal single crystals accumulated over the past 40 years to be used to model heterogeneous catalysts. Using a surface science approach to CO adsorption on supported Pd nanoparticles, we show that this assumption may be flawed. Near-edge X-ray absorption fine structure measurements, isolated to one nanoparticle, show that CO bonds upright on the nanoparticle top facets as expected from single-crystal data. However, the CO lateral registry differs from the single crystal. Our calculations indicate that this is caused by the strain on the nanoparticle, induced by carpet growth across the substrate step edges. This strain also weakens the COmetal bond, which will reduce the energy barrier for catalytic reactions, including CO oxidation.	Jun 2015

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I06-Nanoscience

Influence of support morphology on the bonding of molecules to nanoparticles

Chi Ming Yim , Chi Lun Pang , Diego R. Hermoso , Coinneach Dover , Chris Muryn , Francesco Maccherozzi , Sarnjeet Dhesi , Rubén Pérez , Geoff Thornton

Proceedings Of The National Academy Of Sciences

DOI: 10.1073/pnas.1506939112

PMID: 26080433

Diamond Proposal Number(s): [6485]

Show Abstract ▼