Formation of Surface Platinum Oxides in the Interaction of the Pt/Sibunit Catalysts with NO2

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Formation of Surface Platinum Oxides in the Interaction of the Pt/Sibunit Catalysts with NO₂ : Estimates of the Width of Oxide Shell from XPS Data. / Smirnov, M. Yu; Vovk, E. I.; Kalinkin, A. V. и др.

в: Kinetics and Catalysis, Том 59, № 5, 01.09.2018, стр. 663-671.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{055a235ca8df4401b2a23453eec83b23,

title = "Formation of Surface Platinum Oxides in the Interaction of the Pt/Sibunit Catalysts with NO2: Estimates of the Width of Oxide Shell from XPS Data",

abstract = "The method of X-ray photoelectron spectroscopy (XPS) using two types of radiation, nonmonochromatic AlKα (hν = 1486.6 eV) and monochromatic AgLα (hν = 2984.3 eV), was used to study the interaction of the Pt/C (C = Sibunit) catalysts with NO2, which occurs in the preparation chamber of an XPS spectrometer at room temperature and NO2 pressure, equal to 3 × 10–6 mbar. It was found that, under these conditions, platinum was partially oxidized and metallic core becomes covered with a shell formed by a mixture of PtO and PtO2 oxides. The ratio of intensities Pt4f and Pt3d5/2 belonging to platinum oxides to the corresponding intensities of metallic platinum was used to estimate the width of oxide shell. For two of the three studied Pt/C samples, the width of the shell was 0.15–0.3 nm, which approximately corresponds to one monolayer of platinum oxide with a stoichiometry of PtO or PtO2.",

keywords = "core–shell structure, nitrogen dioxide, platinum, Sibunit, XPS, THERMAL-STABILITY, IN-SITU OXIDATION, SIZE, STATE, PT/C CATALYSTS, CO OXIDATION, OXYGEN, NANOPARTICLES, SUPPORT, core-shell structure, NITROGEN-DIOXIDE",

author = "Smirnov, {M. Yu} and Vovk, {E. I.} and Kalinkin, {A. V.} and Simonov, {P. A.} and Gerasimov, {E. Yu} and Bukhtiyarov, {V. I.}",

note = "Publisher Copyright: {\textcopyright} 2018, Pleiades Publishing, Ltd.",

year = "2018",

month = sep,

day = "1",

doi = "10.1134/S0023158418050130",

language = "English",

volume = "59",

pages = "663--671",

journal = "Kinetics and Catalysis",

issn = "0023-1584",

publisher = "Maik Nauka-Interperiodica Publishing",

number = "5",

}

RIS

TY - JOUR

T1 - Formation of Surface Platinum Oxides in the Interaction of the Pt/Sibunit Catalysts with NO2

T2 - Estimates of the Width of Oxide Shell from XPS Data

AU - Smirnov, M. Yu

AU - Vovk, E. I.

AU - Kalinkin, A. V.

AU - Simonov, P. A.

AU - Gerasimov, E. Yu

AU - Bukhtiyarov, V. I.

PY - 2018/9/1

Y1 - 2018/9/1

N2 - The method of X-ray photoelectron spectroscopy (XPS) using two types of radiation, nonmonochromatic AlKα (hν = 1486.6 eV) and monochromatic AgLα (hν = 2984.3 eV), was used to study the interaction of the Pt/C (C = Sibunit) catalysts with NO2, which occurs in the preparation chamber of an XPS spectrometer at room temperature and NO2 pressure, equal to 3 × 10–6 mbar. It was found that, under these conditions, platinum was partially oxidized and metallic core becomes covered with a shell formed by a mixture of PtO and PtO2 oxides. The ratio of intensities Pt4f and Pt3d5/2 belonging to platinum oxides to the corresponding intensities of metallic platinum was used to estimate the width of oxide shell. For two of the three studied Pt/C samples, the width of the shell was 0.15–0.3 nm, which approximately corresponds to one monolayer of platinum oxide with a stoichiometry of PtO or PtO2.

AB - The method of X-ray photoelectron spectroscopy (XPS) using two types of radiation, nonmonochromatic AlKα (hν = 1486.6 eV) and monochromatic AgLα (hν = 2984.3 eV), was used to study the interaction of the Pt/C (C = Sibunit) catalysts with NO2, which occurs in the preparation chamber of an XPS spectrometer at room temperature and NO2 pressure, equal to 3 × 10–6 mbar. It was found that, under these conditions, platinum was partially oxidized and metallic core becomes covered with a shell formed by a mixture of PtO and PtO2 oxides. The ratio of intensities Pt4f and Pt3d5/2 belonging to platinum oxides to the corresponding intensities of metallic platinum was used to estimate the width of oxide shell. For two of the three studied Pt/C samples, the width of the shell was 0.15–0.3 nm, which approximately corresponds to one monolayer of platinum oxide with a stoichiometry of PtO or PtO2.

KW - core–shell structure

KW - nitrogen dioxide

KW - platinum

KW - Sibunit

KW - XPS

KW - THERMAL-STABILITY

KW - IN-SITU OXIDATION

KW - SIZE

KW - STATE

KW - PT/C CATALYSTS

KW - CO OXIDATION

KW - OXYGEN

KW - NANOPARTICLES

KW - SUPPORT

KW - core-shell structure

KW - NITROGEN-DIOXIDE

UR - http://www.scopus.com/inward/record.url?scp=85053827825&partnerID=8YFLogxK

U2 - 10.1134/S0023158418050130

DO - 10.1134/S0023158418050130

M3 - Article

AN - SCOPUS:85053827825

VL - 59

SP - 663

EP - 671

JO - Kinetics and Catalysis

JF - Kinetics and Catalysis

SN - 0023-1584

IS - 5

ER -

ID: 16702811

Formation of Surface Platinum Oxides in the Interaction of the Pt/Sibunit Catalysts with NO2: Estimates of the Width of Oxide Shell from XPS Data

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Formation of Surface Platinum Oxides in the Interaction of the Pt/Sibunit Catalysts with NO₂: Estimates of the Width of Oxide Shell from XPS Data