Structure and properties of Pd–Mn hexaaluminate catalysts modified with platinum for the high-temperature oxidation of methane

Yashnik, S. A.; Surovtsova, T. A.; Ищенко, А. В.; Каичев, В. В.; Ismagilov, Z. R.

doi:10.1134/s0023158416040157

Cited by 5 publications

(1 citation statement)

References 48 publications

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“…At present, Pd-based compressed natural gas (CNG) catalysts are the main catalysts for methane oxidation on vehicles. The catalytic performance of methane oxidation with Pd supported on different metal oxidation supports has been widely reported, such as ZrO 2 , CeO 2 , Al 2 O 3 , SiO 2 , TiO 2 , La 2 O 3 , MgO, MnO 2 , and so forth. − Pd/Al 2 O 3 showed outstanding catalytic activity for CH 4 oxidation. A large number of studies have shown that PdO has a higher CH 4 oxidation activity at low temperatures than metallic Pd under lean-burn conditions.…”

Section: Introductionmentioning

confidence: 99%

Pd Species Variation and CH₄ Reaction Path on Pd–Pt/Al₂O₃ from Rich to Lean Burn Conditions

Wang

Shen

et al. 2022

J. Phys. Chem. C

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Oxygen concentration ([O2]) in vehicle exhaust fluctuates sharply under different working conditions, such as acceleration, braking, uphill, downhill, and so forth. To reveal the structure–function relationship of Pd–Pt/Al2O3 catalyst from rich to lean burn conditions, the active Pd species and the CH4 reaction paths were studied. It was found that from rich to lean burn conditions, more PdOx was formed, and metallic Pd was gradually transformed to Pd2+ and then to Pd4+. H2O inhibition on CH4 oxidation was found under both rich- and lean-burn conditions below ∼450 °C. However, above ∼450 °C, H2O no longer inhibited CH4 conversion and participated in CH4 reforming reaction, which was dependent on [O2]. The results of in situ DRIFT showed that the adsorption of H2O on Pd0 under rich conditions and the formation of hydrogen bonds between H2O and Pd–OH under lean conditions suppressed the CH4 oxidation. Under rich-burn conditions, the hydroxyl groups were found to accumulate on Pd0 until the CH4 reforming reaction occurred. This work inspired a chance to improve the low-temperature conversion efficiency of CH4 by finely designing the catalyst with more antioxidant metallic Pd sites.

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Section: Introductionmentioning

confidence: 99%

Pd Species Variation and CH₄ Reaction Path on Pd–Pt/Al₂O₃ from Rich to Lean Burn Conditions

Wang

Shen

et al. 2022

J. Phys. Chem. C

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Catalytic Performance of Novel Hierarchical Porous Flower-Like NiCo2O4 Supported Pd in Lean Methane Oxidation

Huang

Lei

et al. 2018

Catal Lett

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Effect of Pt addition on sulfur dioxide and water vapor tolerance of Pd-Mn-hexaaluminate catalysts for high-temperature oxidation of methane

Yashnik

Chesalov

Ищенко

et al. 2017

Applied Catalysis B: Environmental

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Structure and properties of Pd–Mn hexaaluminate catalysts modified with platinum for the high-temperature oxidation of methane

Cited by 5 publications

References 48 publications

Pd Species Variation and CH₄ Reaction Path on Pd–Pt/Al₂O₃ from Rich to Lean Burn Conditions

Pd Species Variation and CH₄ Reaction Path on Pd–Pt/Al₂O₃ from Rich to Lean Burn Conditions

Catalytic Performance of Novel Hierarchical Porous Flower-Like NiCo2O4 Supported Pd in Lean Methane Oxidation

Effect of Pt addition on sulfur dioxide and water vapor tolerance of Pd-Mn-hexaaluminate catalysts for high-temperature oxidation of methane

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Structure and properties of Pd–Mn hexaaluminate catalysts modified with platinum for the high-temperature oxidation of methane

Cited by 5 publications

References 48 publications

Pd Species Variation and CH4 Reaction Path on Pd–Pt/Al2O3 from Rich to Lean Burn Conditions

Pd Species Variation and CH4 Reaction Path on Pd–Pt/Al2O3 from Rich to Lean Burn Conditions

Catalytic Performance of Novel Hierarchical Porous Flower-Like NiCo2O4 Supported Pd in Lean Methane Oxidation

Effect of Pt addition on sulfur dioxide and water vapor tolerance of Pd-Mn-hexaaluminate catalysts for high-temperature oxidation of methane

Contact Info

Product

Resources

About

Pd Species Variation and CH₄ Reaction Path on Pd–Pt/Al₂O₃ from Rich to Lean Burn Conditions

Pd Species Variation and CH₄ Reaction Path on Pd–Pt/Al₂O₃ from Rich to Lean Burn Conditions