Ag/CeO2 nanospheres: Efficient catalysts for formaldehyde oxidation

Ma, Lei; Wang, Dingsheng; Li, Junhua; Bai, Bingyang; Fu, Liqun; Li, Yadong

doi:10.1016/j.apcatb.2013.10.039

Cited by 137 publications

(160 citation statements)

References 35 publications

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“…For this hybrid material, interestingly, the 3d 5/2 peak of Ag in our work was found to shift obviously to the lower binding energy compared with the standard value (about 368.2 eV for bulk Ag). 19,20,22 This confirms the interaction between Ag and ZHL support as the binding energy of monovalent Ag is known to be much lower than that of zerovalent Ag. Similar results were also found in Lin et al work.…”

Section: Structural and Morphologic Characterization Of Agnps(x)/ Zhlsupporting

confidence: 54%

“…XPS spectroscopy has been utilized as a useful tool for qualitatively determining the surface component and composition of the samples. [18][19][20][21][22] Figure 3a shows a survey scan in the range of 0-1000 eV. The peaks on the curve of the AgNPs(2)/ ZHL hybrid sample are assigned to Zn, N, O, Ag, and C elements.…”

Section: Structural and Morphologic Characterization Of Agnps(x)/ Zhlmentioning

confidence: 99%

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Ag Nanoparticles-Based Zinc Hydroxide-Layered Hybrids as Novel and Efficient Catalysts for Reduction of 4-Nitrophenol to 4-Aminophenol

Quites

Azevedo

Alves

et al. 2016

Journal of the Brazilian Chemical Society

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Silver nanoparticles and zinc hydroxide-layered hybrid materials (AgNPs/ZHL) have been successfully developed as efficient catalysts for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with sodium borohydride. A facile and rapid visible-light assisted green route was used for the deposition of silver nanoparticles (AgNPs) on the external surface of ZHL material. The resulting AgNPs/ZHL hybrids contained AgNPs with spherical morphology and uniform size distribution. Moreover, the AgNPs/ZHL compounds exhibited excellent catalytic performance (the reduction reaction was finished within 4 min) and reusability (three cycles) toward the reduction of 4-NP to 4-AP in presence of sodium borohydride. The reduction reaction obeyed the pseudo-first-order kinetics. The rate constants increased with the increase of amount of the AgNPs deposited into the hybrid materials. These results suggest that the as-prepared catalysts (AgNPs/ZHL) have great potential for heterogeneous catalytic applications.

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Section: Structural and Morphologic Characterization Of Agnps(x)/ Zhlsupporting

confidence: 54%

Section: Structural and Morphologic Characterization Of Agnps(x)/ Zhlmentioning

confidence: 99%

Ag Nanoparticles-Based Zinc Hydroxide-Layered Hybrids as Novel and Efficient Catalysts for Reduction of 4-Nitrophenol to 4-Aminophenol

Quites

Azevedo

Alves

et al. 2016

Journal of the Brazilian Chemical Society

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“…It has been shown to be a promising method for indoor air HCHO removal. 12 There are two main kinds of catalysts for HCHO oxidation including supported noble metal (Pt, Au, Rh and Pd) [13][14][15][16][17][18] and non-noble metal oxide (Ag, Co, Ce and Mn) 10,[19][20][21][22][23][24] catalysts.…”

Section: 3mentioning

confidence: 99%

Catalytic oxidation of formaldehyde over manganese oxides with different crystal structures

Zhang

Wang

et al. 2015

Catal. Sci. Technol.

493

254

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, β-, γ-and δ-MnO 2 catalysts were prepared by a hydrothermal method and tested for the catalytic oxidation of formaldehyde (HCHO) at low temperature. Dramatic differences in activities among the MnO 2 catalysts with different crystal structures were observed. The δ-MnO 2 catalyst exhibited the best activity among the four catalysts and achieved nearly complete HCHO conversion at 80°C, while the α-, β-and γ-type MnO 2 obtained 100% HCHO conversion at 125°C, 200°C, 150°C, respectively. The catalysts were next characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), Field-Emission Scanning Electron Microscopy (FE-SEM), temperature-programmed reduction by H 2 (H 2 -TPR), X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption of HCHO (HCHO-TPD) methods to investigate the factors influencing the catalytic activity. Based on the characterization results, it is supposed that the tunnel structure and active lattice oxygen species are the main factors that contribute to the excellent performance of δ-MnO 2 . According to the high catalytic performance and facile preparation process, δ-MnO 2 may potentially be used as a support in applications of supported catalysts.

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“…1 Long-term exposure to indoor air containing even very low concentrations of HCHO may be detrimental to human health, leading to serious health problems including nasal tumors, irritation of the mucous membranes of the eyes and respiratory tract, and skin irritation. 2,3 Increasingly, humans are paying more attention to indoor air pollutants, therefore, the effective abatement of indoor air HCHO is urgently needed to improve indoor air quality and reduce public health risk. Over the past decades, four technologies including adsorption, photo-catalysis, plasma technology and catalytic oxidation were investigated for use in the removal of HCHO.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7][8][9] Among these methods, catalytic oxidation is known as the most promising method for HCHO removal, which could selectively decompose HCHO to harmless CO 2 and water at a low temperature without any secondary pollution. 10,11 For decades, researchers paid attention to conventional catalysts including metal oxides (Co, Ni, Mn, Ag) 3,[12][13][14][15][16][17][18][19][20] and supported noble metal (Pt, Au, Pd, Rh) catalysts [21][22][23][24][25][26][27][28][29][30][31][32][33] for HCHO oxidation. A relatively high temperature is generally needed to completely oxidize HCHO using the metal oxide catalysts.…”

Section: Introductionmentioning

confidence: 99%

Influence of alkali metals on Pd/TiO₂catalysts for catalytic oxidation of formaldehyde at room temperature

Zhang

et al. 2016

Catal. Sci. Technol.

114

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We previously observed that sodium (Na) addition had a dramatic promotion effect on Pd/TiO 2 catalysts for formaldehyde (HCHO) oxidation. In this study, a series of alkali metal (Li, Na, K, Cs) doped Pd/TiO 2 catalysts were prepared and tested for ambient temperature HCHO oxidation. The results showed that the doped alkali metals have a common promotion effect on the performance of the Pd/TiO 2 catalysts for HCHO oxidation under ambient temperature, which followed the order K > Cs > Na > Li. X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), CO chemisorption, Transmission Electric Microscopy (TEM), temperature-programmed reduction by H 2 (H 2 -TPR), X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption by O 2 (O 2 -TPD) methods were used to characterize the alkali metal doped catalysts to investigate the mechanism of the alkali metal promotion effect. The results showed that a negatively charged and well-dispersed Pd species was induced and stabilized by alkali metal addition, which facilitates the activation of chemisorbed oxygen, and then enhances the performance of alkali metal doped Pd/TiO 2 catalysts for room temperature HCHO destruction. The K-Pd/TiO 2 catalyst in particular possessed the highest Pd dispersion degree with active sites, attributing to the best activity in ambient temperature HCHO oxidation.

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Ag/CeO2 nanospheres: Efficient catalysts for formaldehyde oxidation

Cited by 137 publications

References 35 publications

Ag Nanoparticles-Based Zinc Hydroxide-Layered Hybrids as Novel and Efficient Catalysts for Reduction of 4-Nitrophenol to 4-Aminophenol

Ag Nanoparticles-Based Zinc Hydroxide-Layered Hybrids as Novel and Efficient Catalysts for Reduction of 4-Nitrophenol to 4-Aminophenol

Catalytic oxidation of formaldehyde over manganese oxides with different crystal structures

Influence of alkali metals on Pd/TiO₂catalysts for catalytic oxidation of formaldehyde at room temperature

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Ag/CeO2 nanospheres: Efficient catalysts for formaldehyde oxidation

Cited by 137 publications

References 35 publications

Ag Nanoparticles-Based Zinc Hydroxide-Layered Hybrids as Novel and Efficient Catalysts for Reduction of 4-Nitrophenol to 4-Aminophenol

Ag Nanoparticles-Based Zinc Hydroxide-Layered Hybrids as Novel and Efficient Catalysts for Reduction of 4-Nitrophenol to 4-Aminophenol

Catalytic oxidation of formaldehyde over manganese oxides with different crystal structures

Influence of alkali metals on Pd/TiO2catalysts for catalytic oxidation of formaldehyde at room temperature

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Product

Resources

About

Influence of alkali metals on Pd/TiO₂catalysts for catalytic oxidation of formaldehyde at room temperature