Temperature Hysteresis in the Reaction of Methane Oxidation on a Palladium-Doped Manganese Hexaaluminate Catalyst

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Temperature Hysteresis in the Reaction of Methane Oxidation on a Palladium-Doped Manganese Hexaaluminate Catalyst. / Yashnik, S. A.; Vinokurov, Z. S.; Salnikov, A. V. et al.

In: Kinetics and Catalysis, Vol. 59, No. 1, 01.01.2018, p. 70-82.

Research output: Contribution to journal › Article › peer-review

Author

Yashnik, S. A. ; Vinokurov, Z. S. ; Salnikov, A. V. et al. / Temperature Hysteresis in the Reaction of Methane Oxidation on a Palladium-Doped Manganese Hexaaluminate Catalyst. In: Kinetics and Catalysis. 2018 ; Vol. 59, No. 1. pp. 70-82.

BibTeX

@article{c1b21ad0eac94af1a43b0e310846d588,

title = "Temperature Hysteresis in the Reaction of Methane Oxidation on a Palladium-Doped Manganese Hexaaluminate Catalyst",

abstract = "A study of the Pd-containing catalyst based on manganese hexaaluminate by X-ray diffraction analysis, transmission electron microscopy, thermo-programmed reduction with hydrogen, and thermoprogrammed oxidation showed the hysteresis manifested itself in a difference between the temperature dependences of its catalytic activity in the oxidation of methane under the conditions of sample heating or cooling is related to the decomposition of PdO to metallic palladium at temperatures higher than 700–800°C and the subsequent formation of PdO nanoparticles, which are localized on the surface of metallic Pd (30–50 nm) in the form of polycrystalline films with a thickness of 2–5 nm, at temperatures lower than 600–700°C. A near-surface oxide film is formed under the conditions of cooling in oxygen-containing atmospheres, including in the presence of methane. The value of the hysteresis depends on the heat treatment temperature of the catalyst, and it reaches a maximum on the catalysts calcined at 900 and 1000°C.",

keywords = "in situ XRD analysis, manganese hexaaluminate, methane oxidation, palladium doping, thermal hysteresis, TPR-O, ALPHA-ALUMINA, PLATINUM, POWER-PLANT, OXIDE CATALYSTS, COMBUSTION CATALYSTS, TPR-O-2, NOBLE-METAL CONTENT, VEHICLE EMISSION CONTROL, ALUMINA-SUPPORTED PALLADIUM, MONOLITHIC CATALYSTS, PD CATALYST",

author = "Yashnik, {S. A.} and Vinokurov, {Z. S.} and Salnikov, {A. V.} and Ishchenko, {A. V.} and Kaichev, {V. V.} and Ismagilov, {Z. R.}",

year = "2018",

month = jan,

day = "1",

doi = "10.1134/S0023158418010160",

language = "English",

volume = "59",

pages = "70--82",

journal = "Kinetics and Catalysis",

issn = "0023-1584",

publisher = "Maik Nauka-Interperiodica Publishing",

number = "1",

}

RIS

TY - JOUR

T1 - Temperature Hysteresis in the Reaction of Methane Oxidation on a Palladium-Doped Manganese Hexaaluminate Catalyst

AU - Yashnik, S. A.

AU - Vinokurov, Z. S.

AU - Salnikov, A. V.

AU - Ishchenko, A. V.

AU - Kaichev, V. V.

AU - Ismagilov, Z. R.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - A study of the Pd-containing catalyst based on manganese hexaaluminate by X-ray diffraction analysis, transmission electron microscopy, thermo-programmed reduction with hydrogen, and thermoprogrammed oxidation showed the hysteresis manifested itself in a difference between the temperature dependences of its catalytic activity in the oxidation of methane under the conditions of sample heating or cooling is related to the decomposition of PdO to metallic palladium at temperatures higher than 700–800°C and the subsequent formation of PdO nanoparticles, which are localized on the surface of metallic Pd (30–50 nm) in the form of polycrystalline films with a thickness of 2–5 nm, at temperatures lower than 600–700°C. A near-surface oxide film is formed under the conditions of cooling in oxygen-containing atmospheres, including in the presence of methane. The value of the hysteresis depends on the heat treatment temperature of the catalyst, and it reaches a maximum on the catalysts calcined at 900 and 1000°C.

AB - A study of the Pd-containing catalyst based on manganese hexaaluminate by X-ray diffraction analysis, transmission electron microscopy, thermo-programmed reduction with hydrogen, and thermoprogrammed oxidation showed the hysteresis manifested itself in a difference between the temperature dependences of its catalytic activity in the oxidation of methane under the conditions of sample heating or cooling is related to the decomposition of PdO to metallic palladium at temperatures higher than 700–800°C and the subsequent formation of PdO nanoparticles, which are localized on the surface of metallic Pd (30–50 nm) in the form of polycrystalline films with a thickness of 2–5 nm, at temperatures lower than 600–700°C. A near-surface oxide film is formed under the conditions of cooling in oxygen-containing atmospheres, including in the presence of methane. The value of the hysteresis depends on the heat treatment temperature of the catalyst, and it reaches a maximum on the catalysts calcined at 900 and 1000°C.

KW - in situ XRD analysis

KW - manganese hexaaluminate

KW - methane oxidation

KW - palladium doping

KW - thermal hysteresis

KW - TPR-O

KW - ALPHA-ALUMINA

KW - PLATINUM

KW - POWER-PLANT

KW - OXIDE CATALYSTS

KW - COMBUSTION CATALYSTS

KW - TPR-O-2

KW - NOBLE-METAL CONTENT

KW - VEHICLE EMISSION CONTROL

KW - ALUMINA-SUPPORTED PALLADIUM

KW - MONOLITHIC CATALYSTS

KW - PD CATALYST

UR - http://www.scopus.com/inward/record.url?scp=85043273073&partnerID=8YFLogxK

U2 - 10.1134/S0023158418010160

DO - 10.1134/S0023158418010160

M3 - Article

AN - SCOPUS:85043273073

VL - 59

SP - 70

EP - 82

JO - Kinetics and Catalysis

JF - Kinetics and Catalysis

SN - 0023-1584

IS - 1

ER -

ID: 23004097