2008
DOI: 10.1002/ange.200801479
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Trends in the Catalytic CO Oxidation Activity of Nanoparticles

Abstract: Although extended gold surfaces are generally considered chemically inert [1,2] nanosized (< 5 nm) gold particles can be very effective catalysts for a number of oxidation reactions. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] There are reports of similar size effects for silver catalysts. [18,19] The origin of the nanoeffects in the catalytic properties of these metals is widely debated, [15] and no consensus has been reached. Based on a set of density functional theory calculations of the full reac… Show more

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Cited by 136 publications
(101 citation statements)
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“…Indeed, a simultaneous enhancement of strength and ductility has been demonstrated for nanotwinned metals [93][94][95] as well as for materials with gradient microstructure varying from nanograined surface to coarse-grained interior [97,98]. Beyond the mechanical properties, the high sensitivity of catalytic activity of metal surfaces and nanoparticles to their atomic structure [ 99,100] suggests that the presence of a broad spectrum of atomic configurations on nanostructured surfaces produced by femtosecond laser processing may lead to an enhanced catalytic activity of the surface. The presence of twins, in particular, have been found to result in a substantial enhancement of hydrogen absorption [ 101 ] and electrocatalitic activity of icosahedral nanoparticles [102,103].…”
Section: Structure Of the Nanocrystalline Surface Layermentioning
confidence: 99%
“…Indeed, a simultaneous enhancement of strength and ductility has been demonstrated for nanotwinned metals [93][94][95] as well as for materials with gradient microstructure varying from nanograined surface to coarse-grained interior [97,98]. Beyond the mechanical properties, the high sensitivity of catalytic activity of metal surfaces and nanoparticles to their atomic structure [ 99,100] suggests that the presence of a broad spectrum of atomic configurations on nanostructured surfaces produced by femtosecond laser processing may lead to an enhanced catalytic activity of the surface. The presence of twins, in particular, have been found to result in a substantial enhancement of hydrogen absorption [ 101 ] and electrocatalitic activity of icosahedral nanoparticles [102,103].…”
Section: Structure Of the Nanocrystalline Surface Layermentioning
confidence: 99%
“…Several previous works have noted that a lower overall coordination of nearby Au atoms has been found to increase binding strengths. 27,45,46 The effects due to local geometry are, however, comparatively small for Au clusters larger than 55 atoms. The global electronic shell structure is responsible for most of the variation in adsorption energy, as evidenced by the consistent oscillating trend.…”
Section: Chemical Properties Of Clustersmentioning
confidence: 99%
“…When the size decreases, the specific activity is higher. Many authors propose that the key factor of the activity in Au catalysts Is the presence of under-coordinated gold atoms [37,38] which adsorb CO and oxygen more strongly, making the reaction possible.…”
Section: *2* Catalytic Activitymentioning
confidence: 99%