Mesoporous CuO/TiO2 catalysts prepared by the ammonia driven deposition precipitation method for CO preferential oxidation: Effect of metal loading

Papavasiliou, Aggeliki; Everbroeck, Tim Van; Blonda, Cataldo; Oliani, Benedetta; Sakellis, Elias; Cool, Pegie; Canu, Paolo; Katsaros, Fotios K.

doi:10.1016/j.fuel.2021.122491

Cited by 14 publications

(9 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Raman shifts typical of CuO were not detected. However, the strong absorption in the whole UV-Vis region (Figure 4b) revealed the co-existence of isolated copper ions, oligomer Cu-O-Cu species, and bulk CuO crystallites [70]. The higher absorption above 700 nm in the spectrum of CuTi_WI (Figure 4b) indicated the presence of a higher amount of less-dispersed copper phase, which is consistent with the XRD analyses (Table 2).…”

Section: Copper-titania Compositessupporting

confidence: 83%

Design Control of Copper-Doped Titania–Zirconia Catalysts for Methanol Decomposition and Total Oxidation of Ethyl Acetate

et al. 2022

View full text Add to dashboard Cite

This study is focused on the design control of Cu–Zr–Ti oxide composites by the variation of the Zr/Ti ratio and the copper deposition procedure used. For the first time, these ternary composites were obtained by a combination of template-assisted hydrothermal techniques for the preparation of mesoporous ZrO2–TiO2 mixed oxides with diverse compositions, followed by the consecutive chemisorption and hydrolysis of copper ammonia complexes on them. The nitrogen physisorption, XRD, SEM, HRTEM, TPR, XPS, UV-Vis, and Raman spectroscopies were applied for the catalysts’ characterization. Methanol decomposition and the total oxidation of ethyl acetate, both of which with potential for sustainable environmental protection, were used as catalytic tests. The complex relationship between the phase composition, structure, and morphology of titania–zirconia mixed oxides and the state and catalytic behavior of the copper oxide species supported on them was investigated. In comparison with the conventional impregnation technique, the novel preparation procedure revealed the generation of more uniform and homogeneously dispersed needle-like copper oxide crystallites in the mesoporous TiO2–ZrO2 host matrix, which typically ensure improved catalytic performance. The synergistic activity between the loaded copper species and TiO2–ZrO2 support was discussed. All ternary composites exhibited superior catalytic activity in total oxidation of ethyl acetate. The specific behavior of the catalysts in methanol decomposition was related to the irreversible phase transformations by the influence of the reaction medium.

show abstract

Section: Copper-titania Compositessupporting

confidence: 83%

Design Control of Copper-Doped Titania–Zirconia Catalysts for Methanol Decomposition and Total Oxidation of Ethyl Acetate

et al. 2022

View full text Add to dashboard Cite

show abstract

“…23 In H 2 -TPR, the reduction temperature plays a much larger role than the peak area. According to literature and experimental results, 24 the reduction peaks of pure phase CeO 2 and CuO are about 480 1C and 300 1C, respectively.…”

Section: H 2 -Tprmentioning

confidence: 88%

Effect of copper loading on synergism in CuO/CeO₂ nanorod catalysts for toluene combustion

Gao,

Yun,

Deng

et al. 2024

New J. Chem.

View full text Add to dashboard Cite

show abstract

“…A possible solution would be to use sunlight as a sustainable energy source in combination with a suitable photocatalyst [ 8 , 9 , 10 ]. Semiconductors are a well-known class of photocatalyst, of which TiO 2 is an established example often used in applications because of its stability, cost effectiveness, and photocatalytic activity [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ]. However, because of its large bandgap (3.2 eV, anatase) TiO 2 only absorbs UV light which is equivalent to merely 4% of the total solar spectrum.…”

Section: Introductionmentioning

confidence: 99%

Sunlight-Powered Reverse Water Gas Shift Reaction Catalysed by Plasmonic Au/TiO2 Nanocatalysts: Effects of Au Particle Size on the Activity and Selectivity

et al. 2022

Self Cite

View full text Add to dashboard Cite

This study reports the low temperature and low pressure conversion (up to 160 °C, p = 3.5 bar) of CO2 and H2 to CO using plasmonic Au/TiO2 nanocatalysts and mildly concentrated artificial sunlight as the sole energy source (up to 13.9 kW·m-2 = 13.9 suns). To distinguish between photothermal and non-thermal contributors, we investigated the impact of the Au nanoparticle size and light intensity on the activity and selectivity of the catalyst. A comparative study between P25 TiO2-supported Au nanocatalysts of a size of 6 nm and 16 nm displayed a 15 times higher activity for the smaller particles, which can only partially be attributed to the higher Au surface area. Other factors that may play a role are e.g., the electronic contact between Au and TiO2 and the ratio between plasmonic absorption and scattering. Both catalysts displayed ≥84% selectivity for CO (side product is CH4). Furthermore, we demonstrated that the catalytic activity of Au/TiO2 increases exponentially with increasing light intensity, which indicated the presence of a photothermal contributor. In dark, however, both Au/TiO2 catalysts solely produced CH4 at the same catalyst bed temperature (160 °C). We propose that the difference in selectivity is caused by the promotion of CO desorption through charge transfer of plasmon generated charges (as a non-thermal contributor).

show abstract

Mesoporous CuO/TiO2 catalysts prepared by the ammonia driven deposition precipitation method for CO preferential oxidation: Effect of metal loading

Cited by 14 publications

References 64 publications

Design Control of Copper-Doped Titania–Zirconia Catalysts for Methanol Decomposition and Total Oxidation of Ethyl Acetate

Design Control of Copper-Doped Titania–Zirconia Catalysts for Methanol Decomposition and Total Oxidation of Ethyl Acetate

Effect of copper loading on synergism in CuO/CeO₂ nanorod catalysts for toluene combustion

Sunlight-Powered Reverse Water Gas Shift Reaction Catalysed by Plasmonic Au/TiO2 Nanocatalysts: Effects of Au Particle Size on the Activity and Selectivity

Contact Info

Product

Resources

About

Mesoporous CuO/TiO2 catalysts prepared by the ammonia driven deposition precipitation method for CO preferential oxidation: Effect of metal loading

Cited by 14 publications

References 64 publications

Design Control of Copper-Doped Titania–Zirconia Catalysts for Methanol Decomposition and Total Oxidation of Ethyl Acetate

Design Control of Copper-Doped Titania–Zirconia Catalysts for Methanol Decomposition and Total Oxidation of Ethyl Acetate

Effect of copper loading on synergism in CuO/CeO2 nanorod catalysts for toluene combustion

Sunlight-Powered Reverse Water Gas Shift Reaction Catalysed by Plasmonic Au/TiO2 Nanocatalysts: Effects of Au Particle Size on the Activity and Selectivity

Contact Info

Product

Resources

About

Effect of copper loading on synergism in CuO/CeO₂ nanorod catalysts for toluene combustion