Preferential oxidation of carbon monoxide on Co/CeO2 nanoparticles

Woods, Matthew P.; Gawade, Preshit; Tan, Bing; Ozkan, Umit S.

doi:10.1016/j.apcatb.2010.03.015

Cited by 129 publications

(83 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the CeO 2 is not a promising candidate for catalytic samples mainly due to its low catalytic activities [4][5][6][7][8][9]. Numerous reports have shown that the activity of ceria in total oxidation reactions is greatly enhanced by transitional metals like Co, Cu, Ti, Ni, and so on [10][11][12]. Co 3 O 4 is widely used as a non-noble metallic oxide in the catalysis field and shows very high CO oxidation activity in CO/O 2 mixtures even at ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

Deng

Chen

et al. 2015

Catal Lett

View full text Add to dashboard Cite

Three-dimensional macro/mesoporous Co 3 O 4 -CeO 2 was prepared via a facile self-sustained decomposition of metal-organic complexes. Porous Co 3 O 4 -CeO 2 was characterized using X-ray diffraction, scanning electron microscopy/-transmission electron microscopy imaging, N 2 adsorption/ desorption and X-ray photoelectron spectroscopy to examine the morphology and microstructure to find out the cause. Co 3 O 4 -CeO 2 with the 3D hierarchical porous structure consisting of nanoparticles is a coral-like shape with a size of tens of micrometers and exhibits the hierarchically porous morphology, in which the walls of the macropores contain smaller mesopores. The catalytic performance of the porous Co 3 O 4 -CeO 2 for CO oxidation has been studied. Among the obtained catalysts, the porous Co 3 O 4 -CeO 2 with 20 wt% Co exhibits the best catalytic activity and the 50 % CO conversion can be reached at 74°C. The presence of transition metal element Co can promote the production of oxygen vacancies and improve oxygen mobility, which result in enhancing the oxygen-storage capacity of porous Co 3 O 4 -CeO 2 and its catalytic performance for CO conversion. Graphical Abstract& Yude Wang

show abstract

Section: Introductionmentioning

confidence: 99%

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

Deng

Chen

et al. 2015

Catal Lett

View full text Add to dashboard Cite

show abstract

“…[148][149][150][151][152] It is known that CO can be converted to CO 2 by hot electron-assisted oxidation. Deng et al reported visible-light photocatalytic oxidation of CO over a plasmonic metal/semiconductor hybrid material, Au/TiO 2 .…”

Section: Other Chemical Reactionsmentioning

confidence: 99%

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

Kim

Lin

Son

et al. 2017

Advanced Optical Materials

167

116

View full text Add to dashboard Cite

Hot electron chemistry has drawn tremendous attention from applications related to materials, energy, sensing, and catalysis. The plasmon‐induced generation of hot electrons and their transfer behavior are very important for understanding plasmonic‐enhanced applications and for achieving practically useful efficiency. From a plasmonic perspective, well‐designed plasmonic structures that can manipulate surface plasmons are able to enhance the efficiencies of hot electron‐based processes. This progress report summarizes the recent experimental and theoretical advances on the hot electron effect, emphasizing the crucial role of surface plasmons that are highly designable by using metal nanostructures. In particular, recent breakthroughs in the emerging fields of heterogeneous catalysis based on the hot electron effect are highlighted. Important design principles, mechanisms, and concepts, as well as challenges and perspectives, are illustrated and discussed.

show abstract

“…PEMFC technology promises to be a clean and efficient alternative to combustion of fuels for power generation in stationary and mobile applications [1]. Hydrogen, as PEMFC fuel, can be generated by steam reforming, partial oxidation, or auto-thermal reforming of liquid fuels [2] or natural gas in combination with the water gas shift reaction.…”

Section: Introductionmentioning

confidence: 99%

CuO-CeO2 supported on montmorillonite-derived porous clay heterostructures (PCH) for preferential CO oxidation in H2-rich stream

et al. 2015

View full text Add to dashboard Cite

a b s t r a c tThis study reports on the preparation and characterization of porous clay heterostructures (PCH) as a high-surface-area support for CuO-CeO 2 based catalysts for the preferential oxidation of CO in excess of H 2 (CO-PROX). After pillaring the montmorillonite clay with silica (Si-PCH) and silica-zirconia (SiZr-PCH), the Cu-Ce active phase was loaded by incipient wet impregnation setting the cerium amount constant (20 wt%) and investigating three different copper loadings (3, 6 and 12 wt%). The use of pillars of silica or silica-zirconia inserted in the interlayer space of a natural clay provides a high surface area support that can favor the dispersion of both CuO and CeO 2 active phases, leading to the formation of a high amount of copper-ceria interfacial sites, responsible for a very high catalytic activity in the CO-PROX reaction.The results obtained from characterization of the materials by XRD, N 2 physisorption, H 2 -TPR, XPS and CO 2 -TPD suggest that this synthesis method gives rise to catalysts with copper species highly active and selective for the CO-PROX reaction.The catalysts exhibit high CO conversion values and the sample with 6 wt% of copper on Si-PCH displays very good performances, comparable to those based on precious metal catalysts, even at low temperatures.The system reducibility was found modified by the incorporation of zirconium in the support, with a slight decrement of the CO conversion value, compared to the same material without Zr. The influence of the presence of CO 2 and H 2 O in the gas feed was also studied in order to simulate the real operating conditions of a PEMFC feed stream. Correlations between catalytic performances and physicochemical properties of the materials have been made.

show abstract

Preferential oxidation of carbon monoxide on Co/CeO2 nanoparticles

Cited by 129 publications

References 25 publications

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

Flash Synthesis and CO Oxidation of Macro-/Nano-porous Co3O4–CeO2 Via Self-Sustained Decomposition of Metal–Organic Complexes

Hot‐Electron‐Mediated Photochemical Reactions: Principles, Recent Advances, and Challenges

CuO-CeO2 supported on montmorillonite-derived porous clay heterostructures (PCH) for preferential CO oxidation in H2-rich stream

Contact Info

Product

Resources

About