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Rhodium Nanoparticle Shape Dependence In The Reduction Of No By Co, James Russell Renzas, Yawen Zhang, Wenyu Huang, Gabor Somoraji
Rhodium Nanoparticle Shape Dependence In The Reduction Of No By Co, James Russell Renzas, Yawen Zhang, Wenyu Huang, Gabor Somoraji
Wenyu Huang
The shape dependence of the catalytic reduction of nitric oxide by carbon monoxide on rhodium nanopoly- hedra and nanocubes was studied from 230 to 270 ° C. The nanocubes are found to exhibit higher turnover frequency and lower activation energy than the nanopolyhedra. These trends are compared to previous studies on Rh single crystals.
A Reactive Oxide Overlayer On Rhodium Nanoparticles During Co Oxidation And Its Size Dependence Studied By In Situ Ambient-Pressure X-Ray Photoelectron Spectroscopy, Michael E. Grass, Hendrik Bluhm, Yawen Zhang, Derek Butcher, Jeong Y. Park, Yimin Li, Kaitlin M. Bratlie, Tianfu Zhang, Gabor A. Somorjai
A Reactive Oxide Overlayer On Rhodium Nanoparticles During Co Oxidation And Its Size Dependence Studied By In Situ Ambient-Pressure X-Ray Photoelectron Spectroscopy, Michael E. Grass, Hendrik Bluhm, Yawen Zhang, Derek Butcher, Jeong Y. Park, Yimin Li, Kaitlin M. Bratlie, Tianfu Zhang, Gabor A. Somorjai
Kaitlin M. Bratlie
The smaller, the better: In situ synchrotron ambient pressure X-ray photoelectron spectroscopy allows examination of the oxidation state of the surface of the rhodium nanoparticles (NPs) during CO oxidation in an O2 atmosphere. 2 nm NPs oxidize to a larger extent than 7 nm NPs during reaction at 150-200°C, which correlates with a fivefold increase in turnover frequency for the smaller nanoparticles.