High-surface area CuO–CeO2 catalysts prepared by a surfactant-templated method for low-temperature CO oxidation

Luo, Ming; Ma, Jijie; Lu, Ji-Qing; Song, Yupeng; Wang, Yuejuan

doi:10.1016/j.jcat.2006.11.021

Cited by 399 publications

(105 citation statements)

References 27 publications

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“…They claimed that desorption of H 2 attached on the reduced Cu metal surface could exhibit the apparent double-peak behavior, which could be affected by water vapor produced by the reduction process, and that the H 2 -TPR profile of CuO depends on the particle size and surface area, where the peak top is higher by 288˝C for particle sizes of 425-850 microns compared with <100 microns [39]. A similar tendency but with a much larger peak was also reported by Luo et al [40], who claimed that the hydrogen spillover effect was the reason for the difference between CO-TPR and H 2 -TPR.…”

Section: Temperature Program Reduction (Tpr)supporting

confidence: 77%

Low-Temperature Catalytic Performance of Ni-Cu/Al2O3 Catalysts for Gasoline Reforming to Produce Hydrogen Applied in Spark Ignition Engines

2016

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Abstract:The performance of Ni-Cu/Al 2 O 3 catalysts for steam reforming (SR) of gasoline to produce a hydrogen-rich gas mixture applied in a spark ignition (SI) engine was investigated at relatively low temperature. The structural and morphological features and catalysis activity were observed by X-ray diffractometry (XRD), scanning electron microscopy (SEM), and temperature programmed reduction (TPR). The results showed that the addition of copper improved the dispersion of nickel and therefore facilitated the reduction of Ni at low temperature. The highest hydrogen selectivity of 70.6% is observed over the Ni-Cu/Al 2 O 3 catalysts at a steam/carbon ratio of 0.9. With Cu promotion, a gasoline conversion of 42.6% can be achieved at 550˝C, while with both Mo and Ce promotion, the gasoline conversions were 31.7% and 28.3%, respectively, higher than with the conventional Ni catalyst. On the other hand, initial durability testing showed that the conversion of gasoline over Ni-Cu/Al 2 O 3 catalysts slightly decreased after 30 h reaction time.

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Section: Temperature Program Reduction (Tpr)supporting

confidence: 77%

Low-Temperature Catalytic Performance of Ni-Cu/Al2O3 Catalysts for Gasoline Reforming to Produce Hydrogen Applied in Spark Ignition Engines

2016

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“…Catalytic oxidation is a good removal method, even for low concentrations of CO. The catalytic oxidation of CO is one of the simplest and the most extensively investigated reactions in heterogeneous catalysis [1][2][3][4][5][6][7][8][9][10], and the catalytic oxidation of CO has become an important research topic over the past years. Up to now, many very effective noble metal catalysts, such as Pd [3,11], Au [4,12], Ru [13,14], and Pt [5,15] have been developed for this reaction.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, much attention was given to seeking non-noble metal catalysts such as Cu [7,9,16], Mn [17], and Co [18][19][20] to reduce the price and realize high-efficiency CO conversion. In all of these base metal CO oxidation catalysts, supported copper catalysts on Fe 2 O 3 , CeO 2 , ZrO 2 , and Ce-Zr-O exhibited very high catalytic activities similar to noble metal catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…Many investigations have demonstrated that the high surface area of the supports would give rise to well-dispersed and stable CuO active species nanoparticles on the surface upon calcination and reduction, which would further lead to an improved catalytic performance [2,9]. At the same time, the supported catalysts can show a synergistic effect to induce properties that are different from those of each individual component.…”

Section: Introductionmentioning

confidence: 99%

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CuO Nanorods-Decorated Reduced Graphene Oxide Nanocatalysts for Catalytic Oxidation of CO

et al. 2016

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Abstract:Developing an efficient non-noble catalyst for CO oxidation with high catalytic activity remains a challenge for practical applications. In this work, CuO nanorods decorated reduced graphene oxide (RGO) nanocatalysts were prepared via a facile one-step hydrothermal method. The structure and morphology of the as-prepared samples were characterized by XRD, Raman spectroscopy, SEM, TEM, and X-ray photoelectron spectroscopy (XPS). The analysis results show that CuO nanorods were successfully deposited on the surface of RGO sheets with the length of 250-500 nm. The catalytic properties of the as-prepared catalysts for CO oxidation were evaluated by using a microreactor-gas chromatograph (GC) system. The as-prepared RGO-CuO nanocatalysts exhibited high activity for CO oxidation, and the 10 wt % reduced graphene oxide content catalyst can achieve CO total oxidation at 165 • C.

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“…Figure 5(a)). It is reasonable to consider that the additive Cu promotes CO oxidation reaction, Meng-Fei Luo et al [18] and G. Avgouropoulos et al [19] are also reported that the additive Cu promotes CO oxidation reaction at low temperatures. The same trend of …”

Section: Catalytic Activity Measurements (Co C3h8 No)mentioning

confidence: 99%

Effects of CuO-CeO<sub>2</sub> Addition on Structure and Catalytic Properties of Three Way Catalysts

Luong¹,

Tien²,

Yamasue³

et al. 2017

MSCE

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The noble metals (Pt, Pd, Rh) supported on Cu-Ce mixed oxides with γ-Al 2 O 3 washcoat/FeCrAl substrate were investigated as catalytic performance of Three Way Catalysts (TWC) under simulated automotive exhaust feed gas. The structural, morphological features and catalytic activity were observed by X-ray diffractometry (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS) and GC-TCD (Varian CP-4900). The catalytic performance of noble metals (Pt, Rh, Pd) supported on Cu-Ce mixed oxides with γ-Al 2 O 3 washcoat/FeCrAl substrate was be compared with noble metals (Pt, Rh, Pd) supported on Ce-Zr mixed oxides with γ-Al 2 O 3 washcoat/FeCrAl substrate and only γ-Al 2 O 3 washcoat/FeCrAl substrate at various stoichiometric ratio of oxygen. The results showed that the addition of Cu-Ce mixed oxides improved CO oxidation reaction at lower temperature during stable lambda of 1, the highest CO conversion of 99% is observed for the noble metals (Pt, Pd, Rh) support on Cu-Ce with γ-Al 2 O 3 washcoat/FeCrAl substrate. The results also showed that, the addition of Cu-Ce mixed oxides promoted released oxygen, thus it improved strongly CO and C 3 H 8 conversion at lean oxygen stoichiometric operation.

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High-surface area CuO–CeO2 catalysts prepared by a surfactant-templated method for low-temperature CO oxidation

Cited by 399 publications

References 27 publications

Low-Temperature Catalytic Performance of Ni-Cu/Al2O3 Catalysts for Gasoline Reforming to Produce Hydrogen Applied in Spark Ignition Engines

Low-Temperature Catalytic Performance of Ni-Cu/Al2O3 Catalysts for Gasoline Reforming to Produce Hydrogen Applied in Spark Ignition Engines

CuO Nanorods-Decorated Reduced Graphene Oxide Nanocatalysts for Catalytic Oxidation of CO

Effects of CuO-CeO<sub>2</sub> Addition on Structure and Catalytic Properties of Three Way Catalysts

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High-surface area CuO–CeO2 catalysts prepared by a surfactant-templated method for low-temperature CO oxidation

Cited by 399 publications

References 27 publications

Low-Temperature Catalytic Performance of Ni-Cu/Al2O3 Catalysts for Gasoline Reforming to Produce Hydrogen Applied in Spark Ignition Engines

Low-Temperature Catalytic Performance of Ni-Cu/Al2O3 Catalysts for Gasoline Reforming to Produce Hydrogen Applied in Spark Ignition Engines

CuO Nanorods-Decorated Reduced Graphene Oxide Nanocatalysts for Catalytic Oxidation of CO

Effects of CuO-CeO&lt;sub&gt;2&lt;/sub&gt; Addition on Structure and Catalytic Properties of Three Way Catalysts

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Effects of CuO-CeO<sub>2</sub> Addition on Structure and Catalytic Properties of Three Way Catalysts