2010
DOI: 10.1021/ja101108w
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Preferential CO Oxidation in Hydrogen: Reactivity of Core−Shell Nanoparticles

Abstract: We report on the first-principles-guided design, synthesis, and characterization of core-shell nanoparticle (NP) catalysts made of a transition metal core (M = Ru, Rh, Ir, Pd, or Au) covered with a approximately 1-2 monolayer thick shell of Pt atoms (i.e., a M@Pt core-shell NP). An array of experimental techniques, including X-ray diffraction, Fourier transform infrared spectroscopy, high resolution transmission electron microscopy, and temperature-programmed reaction, are employed to establish the composition… Show more

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Cited by 265 publications
(232 citation statements)
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“…57 We found that this is the case for small Au NPs as well. As presented by Nilekar et al in transition metal-Pt shell NPs, 57 modifying Au NPs with alloying elements would be a promising way for the lower CO adsorption energy and Figure 7. CO oxidation by Au 13 of CeO 2 -supported Au 13 NPs is shown with Au 13 @CeO 2 -STO in (a) and Au 13 @CeO 2 -3VAC in (b).…”
Section: −1mentioning
confidence: 57%
“…57 We found that this is the case for small Au NPs as well. As presented by Nilekar et al in transition metal-Pt shell NPs, 57 modifying Au NPs with alloying elements would be a promising way for the lower CO adsorption energy and Figure 7. CO oxidation by Au 13 of CeO 2 -supported Au 13 NPs is shown with Au 13 @CeO 2 -STO in (a) and Au 13 @CeO 2 -3VAC in (b).…”
Section: −1mentioning
confidence: 57%
“…A higher coordination number will lead to a deeper d-band center. 54 In addition, lattice strain caused by twinned defects 12 or the core-shell interface 5,55 has a strong influence on the interaction between two adjacent surface atoms and thus affects the electronic structure of surface atoms. If the lattice is compressed, the d-band center will be deeper.…”
Section: Relationship Between Catalytic Performance and The Shape Of mentioning
confidence: 99%
“…16 Further, theoretical methods and the available computational power have reached a level where quantum mechanical simulations can be used for understanding and directing catalyst design. [17][18][19][20] Guided by first principle predictions of the CO tolerance of ternary Pt-Ru-M alloys, Strasser et al discovered an active class of Co-rich Pt-Ru-Co methanol oxidation catalysts. 21,22 The superiority of this system was later confirmed in an independent study by Cooper and McGinn.…”
Section: Introductionmentioning
confidence: 99%