Cu/CeO2 as efficient low-temperature CO oxidation catalysts: effects of morphological structure and Cu content

Wu, Chunlei; Guo, Zengzeng; Chen, Xiaoyu; Liu, Hong

doi:10.1007/s11144-020-01870-0

Cited by 11 publications

(4 citation statements)

References 38 publications

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“…Three different ternary catalysts labeled as Pt Trimetallic AuPdPt@WC/C catalyst also showed improvement in electrocatalytic MO reaction compared to commercial Pt/C catalyst. 200 The anti-poisoning ability of trimetallic AuPdPt@WC/C was 5 times better than the commercial Pt/C catalyst. The formation of highly dispersed AuPdPt metals on WC support, the coupling effect between NPs enhanced the elctrocatalytic performance.…”

Section: Electrocatalysismentioning

confidence: 98%

“…200,201 A comparative study between Pd/Co 3 O 4 , Pd/Fe 3 O 4 and Pd/Ni(OH) 2 catalysts for the CO oxidation in a programmable flow tube furnace reactor indicated that both 30 wt % Pd/Co 3 O 4 and 50 wt% Pd/Fe 3 O 4 catalysts can produce 100 % CO °C as Co 3 O 4 support itself had significant conversion efficiency 127. In related literature, the Pd/Fe 2 O 3 -573 catalyst (Pd 1.87 wt%) prepared by coprecipitation followed by calcination at 573 K produced 100 % CO oxidation efficiency at only 60 °C 202.…”

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confidence: 99%

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Supported nanocatalysts: recent developments in microwave synthesis for application in heterogeneous catalysis

Ahmad

Hossain

2022

Mater. Adv.

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Section: Electrocatalysismentioning

confidence: 98%

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confidence: 99%

Supported nanocatalysts: recent developments in microwave synthesis for application in heterogeneous catalysis

Ahmad

Hossain

2022

Mater. Adv.

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“…However, their widespread application is limited owing to resource scarcity and high prices. Non-noble metal catalysts, particularly transition metal catalysts, such as SnO 2 [8], CuO [9,10], Co 3 O 4 [11], Mn 3 O 4 [12], and CeO 2 [8,13], also demonstrate high activity in the catalytic oxidation reaction of CO. Among them, tin (Sn)-based catalysts have garnered more attention owing to their excellent catalytic activity and stability, which are comparable to those of precious metals.…”

Section: Introductionmentioning

confidence: 99%

Insights into SnO2 Nanoparticles Supported on Fibrous Mesoporous Silica for CO Catalytic Oxidation

Zhang

Yan

et al. 2023

Catalysts

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A large surface area dendritic mesoporous silica material (KCC-1) was successfully synthesized and used as a support to confine SnO2 nanoparticles (NPs). Owing to the large specific surface area and abundant mesoporous structure of dendritic KCC-1, the SnO2 NPs were highly dispersed, resulting in significantly improved CO catalytic oxidation activity. The obtained Snx/KCC-1 catalysts (x represents the mass fraction of SnO2 loading) exhibited excellent CO catalytic activity, with the Sn7@KCC-1 catalyst achieving 90% CO conversion at about 175 °C. The SnO2 NPs on the KCC-1 surface in a highly dispersed amorphous form, as well as the excellent interaction between SnO2 NPs and KCC-1, positively contributed to the catalytic removal process of CO on the catalyst surface. The CO catalytic removal pathway was established through a combination of in situ diffuse reflectance infrared transform spectroscopy and density-functional theory calculations, revealing the sequential steps: ① CO → CO32−ads, ② CO32−ads → CO2free+SnOx−1, ③ SnOx−1+O2 → SnOx+1. This study provides valuable insights into the design of high-efficiency non-precious metal catalysts for CO catalytic oxidation catalysts with high efficiency.

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“…Gold is known for its high activity in low-temperature CO oxidation [8][9][10][11]. Catalysts studied for this reaction are very frequently supported on ceria [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], although other oxides have also been tested as supports [17]. An unsupported cobalt oxide catalyst has also shown to achieve very high conversions of CO at low temperatures [18].…”

Section: Introductionmentioning

confidence: 99%

Reducibility Studies of Ceria, Ce0.85Zr0.15O2 (CZ) and Au/CZ Catalysts after Alkali Ion Doping: Impact on Activity in Oxidation of NO and CO

Iwanek

Liotta

Williams³

et al. 2022

Catalysts

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The aim of these studies was to perform thorough research on the influence of alkali metal ions (Li, Na, K and Cs) on the properties of nanogold catalysts supported on ceria–zirconia. The addition of alkali metal ions onto CeO2 further affected the reducibility, which was not noted for the Zr-doped support (Ce0.85Zr0.15O2). Despite the substantial impact of alkali metal ions on the reducibility of ceria, the activity in CO oxidation did not change much. In contrast, they do not have a large effect on the reducibility of Au/CZ but suppressed the activity of this system in CO oxidation. The results show that for CO oxidation, the negative effect of potassium ions is greater than that of sodium, which corresponds to the shift in the Tmax of the reduction peak towards higher temperatures. The negative effect of Li+ and Cs+ spans 50% CO conversion. The negative effect was visible for CO oxidation in both the model stream and the complex stream, which also contained hydrocarbons and NO. In the case of NO oxidation to NO2, two temperature regimes were observed for Au + 0.3 at% K/CZ, namely in the temperature range below 350 °C; the effect of potassium ions was beneficial for NO oxidation, whereas at higher temperatures, the undoped gold catalyst produced more NO2.

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Cu/CeO2 as efficient low-temperature CO oxidation catalysts: effects of morphological structure and Cu content

Cited by 11 publications

References 38 publications

Supported nanocatalysts: recent developments in microwave synthesis for application in heterogeneous catalysis

Supported nanocatalysts: recent developments in microwave synthesis for application in heterogeneous catalysis

Insights into SnO2 Nanoparticles Supported on Fibrous Mesoporous Silica for CO Catalytic Oxidation

Reducibility Studies of Ceria, Ce0.85Zr0.15O2 (CZ) and Au/CZ Catalysts after Alkali Ion Doping: Impact on Activity in Oxidation of NO and CO

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