Preferential CO oxidation in a H2-rich gas by Au/CeO2 catalysts: Nanoscale CeO2 shape effect and mechanism aspect

Yi, Guangquan; Yang, Hongwei; Li, Bodong; Lin, Haiqiang; Tanaka, Kenichi; Yuan, Youzhu

doi:10.1016/j.cattod.2010.01.049

Cited by 69 publications

(31 citation statements)

References 35 publications

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“…The lowest activity of the Au/CeO 2 nanocubes was explained by the predominance of metallic gold species on the support surface and the negligible metal-support interaction, as demonstrated by X-ray photoelectron spectroscopy (XPS) and hydrogen-temperature programmed reduction (H 2 -TPR) [110]. Subsequently, Yuan and co-workers found that the activity in the preferential CO oxidation in H 2 -rich gas followed the same trend mentioned above [112,114]. Cao and co-workers demonstrated that the activity of Au/CeO 2 nanorods in CO oxidation was much higher than that of Au/CeO 2 nanoparticles [113].…”

Section: Effect Of the Particle Morphology Of The Supportmentioning

confidence: 81%

“…(2) can we find active gold catalysts based on previously overlooked supports (e.g., metal phosphates)? In addition, the effects of the crystal phase [65,82,[96][97][98][99][100], size [99,[101][102][103][104][105][106][107][108], and shape [45,[108][109][110][111][112][113][114] of solid supports on the catalytic performance are also of interest. Below we first present the development of Au/SiO 2 and Au/metal phosphate catalysts in our group, and then highlight recent findings on the effects of the particle size and shape of solid supports.…”

Section: General Considerationsmentioning

confidence: 99%

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Development of novel supported gold catalysts: A materials perspective

2010

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Since Haruta et al. discovered that small gold nanoparticles finely dispersed on certain metal oxide supports can exhibit surprisingly high activity in CO oxidation below room temperature, heterogeneous catalysis by supported gold nanoparticles has attracted tremendous attention. The majority of publications deal with the preparation and characterization of conventional gold catalysts (e.g., Au/TiO 2 ), the use of gold catalysts in various catalytic reactions, as well as elucidation of the nature of the active sites and reaction mechanisms. In this overview, we highlight the development of novel supported gold catalysts from a materials perspective. Examples, mostly from those reported by our group, are given concerning the development of simple gold catalysts with single metal-support interfaces and heterostructured gold catalysts with complicated interfacial structures. Catalysts in the first category include active Au/SiO 2 and Au/metal phosphate catalysts, and those in the second category include catalysts prepared by pre-modification of supports before loading gold, by post-modification of supported gold catalysts, or by simultaneous dispersion of gold and an inorganic component onto a support. CO oxidation has generally been employed as a probe reaction to screen the activities of these catalysts. These novel gold catalysts not only provide possibilities for applied catalysis, but also furnish grounds for fundamental research.

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Section: Effect Of the Particle Morphology Of The Supportmentioning

confidence: 81%

Section: General Considerationsmentioning

confidence: 99%

Development of novel supported gold catalysts: A materials perspective

2010

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“…Therefore, the nature of the defects on different shapes of RMO can greatly affect the catalytic performances of supported gold systems. Yi et al [68] also observed that the catalytic activity of Au supported on CeO 2 with different shapes was as the following sequences in the preferential CO oxidation (PROX) reaction: rods > polyhedra > cubes. These results implied that the intrinsic origin of the crystal plane effect of the RMOs might be the different concentration of oxygen or defect on the surfaces, which could impose profound effect on the catalytic activity.…”

Section: Morphology Effects Of the Rmo Supportsmentioning

confidence: 98%

Catalysis by gold: New insights into the support effect

et al. 2013

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“…Indeed the synthesis approach within those papers has become the standard recipe for the preparation of rods and cubes [93,100,[103][104][105][106]. Further, the conclusion from those Catalytic mechanism for CO 2 reforming of methane over Ni-supported CeO 2 rod.…”

Section: Recent Work On the Structure And Reactivity Of Ceria Nanoshapesmentioning

confidence: 96%