Effect of yttria in Pt/TiO<sub>2</sub> on sulfur resistance diesel oxidation catalysts: enhancement of low-temperature activity and stability

Yang, Zhengzheng; Zhang, Na; Cao, Yi; Gong, Maochu; Zhao, Ming; Chen, Yaoqiang

doi:10.1039/c4cy00424h

Cited by 45 publications

(31 citation statements)

References 74 publications

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“…It was confirmed by HRTEM (Fig. 36,37 In the process of Pt/FeO x -100 preparation, with the assistance of Pt nanoparticle, a small portion of Fe 3+ in the FeO x -100 was reduced to Fe 2+ forming a certain amount of Fe 3 O 4 phase (see in XRD patterns, Figure 6). They nearly preserve the particle size of Pt colloid nanoparticles.…”

Section: Role Of Feo X Microstructure In the Formation Of Pt-support mentioning

confidence: 70%

“…34 As for Pt/FeO x -430 and Pt/FeO x -500, only α-Fe 2 O 3 phase can be observed, indicating the interface reaction is very weak in these two samples. 19,35,36 The molar ratio of Pt 2+ /Pt 0 is 0.74, 1.54 and 1.64 for Pt/FeO x -100, Pt/FeO x -300 and Pt/FeO x -500, indicating that the amount of Pt 2+ increases from Pt/FeO x -100 to Pt/FeO x -500. It was confirmed by HRTEM (Fig.…”

Section: Role Of Feo X Microstructure In the Formation Of Pt-support mentioning

confidence: 96%

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Role of the FeO_xsupport in constructing high-performance Pt/FeO_xcatalysts for low-temperature CO oxidation

Zheng

Liu

Geng

et al. 2016

Catal. Sci. Technol.

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a Based on a simple colloid deposition method, a series of Pt/FeOx catalysts were prepared using 3-4 nm Pt colloid nanoparticles and FeOx with different microstructure (i.e. the structure and surface properties). FeOx support was obtained via a thermal-treatment method, which enables the tailoring of FeOx from ferrihydrite to α-Fe2O3 and the amount of hydroxides on the surface of FeOx decreases gradually with the phase changing. Over an optimized Pt/FeOx, CO could be completely converted at room temperature (298 K) and a relatively high space velocity (1.2╳10 5 mL·g -1 ·h -1 ). The correlation between the microstructure of FeOx support and the CO oxidation performance of resultant Pt/FeOx catalyst was investigated. Although the oxidation of Pt nanoparticles is inevitable in the process of Pt-loading, relatively large amounts of Pt 0 species can be preserved on the FeOx support possessing abundant surface hydroxides. In-situ DRIFT shows that the surface hydroxides of FeOx could also participate in the catalytic process: they could react with CO absorbed on Pt 0 sites and then recover easily in the co-presence of molecular oxygen and water gas. These results show that intrinsic properties of FeOx support not only affect the oxidation state of supported Pt nanoparticles in the preparation process, but also provide new active sites in the catalytic process. FeOx support possessing abundant surface hydroxides is suitable for preparing high performance Pt/FeOx catalyst for low-temperature CO oxidation.

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Section: Role Of Feo X Microstructure In the Formation Of Pt-support mentioning

confidence: 70%

Section: Role Of Feo X Microstructure In the Formation Of Pt-support mentioning

confidence: 96%

Role of the FeO_xsupport in constructing high-performance Pt/FeO_xcatalysts for low-temperature CO oxidation

Zheng

Liu

Geng

et al. 2016

Catal. Sci. Technol.

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“…Furthermore, the pore volume of Pt/WZ800 x decreased while the average pore diameter increased. It indicated that there are pores reconstructed during the process of calcining, which may lead to the encapsulation of the active site Pt [31]. So, it is not surprising that the gas yields over Cat7-Cat12 are much smaller than that of bare tubes even at high temperatures.…”

Section: The Catalytic Performance Of Catalystsmentioning

confidence: 94%

Performance of RP-3 kerosene cracking over Pt/WO3–ZrO2 catalyst

Jiao

Wang

et al. 2015

Journal of Analytical and Applied Pyrolysis

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“…Besides for improving the contact condition, people also do a lot of work on enhancing the intrinsic activity of catalysts. Many catalysts, which including noble metals, perovskite‐type oxides, CeO 2 ‐based oxides, MnOx‐based oxides etc, have been designed and studied for soot combustion . In the past decades, owing to changing valence states of Mn 4+ , Mn 3+ and Mn 2+ in the MnO x , manganese oxides exhibit excellent catalytic performance for redox reactions.…”

Section: Introductionmentioning

confidence: 75%

3DOM SiO₂-Supported Different Alkali Metals-Modified MnOx Catalysts: Preparation and Catalytic Performance for Soot combustion

Wang

Zhang

et al. 2017

ChemistrySelect

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A series of novel and cheap catalysts, which contain three‐dimensionally ordered macroporous (3DOM) structure and alkali‐doped MnOx nanoparticles, were designed and prepared by a facile method. The physical and chemical properties of as‐prepared catalysts were characterized by XRD, SEM, TEM, Raman and H2‐TPR and so on. The as‐prepared catalysts exhibit excellent catalytic performance for soot combustion, which the T10, T50 and T90 are 275 oC, 323 oC and 351 oC, respectively. This activity result is comparable to or even higher than noble metal catalyst in the medium and high temperature range. The high catalytic activities of as‐prepared catalysts are attributed to marcroporous structure, nano‐effect, immobilization effect and synergistic effect. Based on the analysis results, the possible reaction mechanisms of catalysts for soot combustion, were also proposed. Due to easy synthesis, low cost, high activity, the as‐prepared catalysts are promising for practical applications, and this work also provides potential research approaches to get excellent catalysts.

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Effect of yttria in Pt/TiO₂ on sulfur resistance diesel oxidation catalysts: enhancement of low-temperature activity and stability

Abstract: Yttria in Pt/TiO2 catalyst improved the Pt dispersion and stabilized the structure, and hence enhanced the low-temperature activity and stability.

Cited by 45 publications

References 74 publications

Role of the FeO_xsupport in constructing high-performance Pt/FeO_xcatalysts for low-temperature CO oxidation

Role of the FeO_xsupport in constructing high-performance Pt/FeO_xcatalysts for low-temperature CO oxidation

Performance of RP-3 kerosene cracking over Pt/WO3–ZrO2 catalyst

3DOM SiO₂-Supported Different Alkali Metals-Modified MnOx Catalysts: Preparation and Catalytic Performance for Soot combustion

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Effect of yttria in Pt/TiO2 on sulfur resistance diesel oxidation catalysts: enhancement of low-temperature activity and stability

Abstract: Yttria in Pt/TiO2 catalyst improved the Pt dispersion and stabilized the structure, and hence enhanced the low-temperature activity and stability.

Cited by 45 publications

References 74 publications

Role of the FeOxsupport in constructing high-performance Pt/FeOxcatalysts for low-temperature CO oxidation

Role of the FeOxsupport in constructing high-performance Pt/FeOxcatalysts for low-temperature CO oxidation

Performance of RP-3 kerosene cracking over Pt/WO3–ZrO2 catalyst

3DOM SiO2-Supported Different Alkali Metals-Modified MnOx Catalysts: Preparation and Catalytic Performance for Soot combustion

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Product

Resources

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Effect of yttria in Pt/TiO₂ on sulfur resistance diesel oxidation catalysts: enhancement of low-temperature activity and stability

Role of the FeO_xsupport in constructing high-performance Pt/FeO_xcatalysts for low-temperature CO oxidation

Role of the FeO_xsupport in constructing high-performance Pt/FeO_xcatalysts for low-temperature CO oxidation

3DOM SiO₂-Supported Different Alkali Metals-Modified MnOx Catalysts: Preparation and Catalytic Performance for Soot combustion