Synthesis of Hydroxylamine Sulfate via NO Hydrogenation over Pt/Graphite Catalysts. I

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Synthesis of Hydroxylamine Sulfate via NO Hydrogenation over Pt/Graphite Catalysts. I : Physicochemical State of Platinum Particles and the Surface of the Support in the Catalysts. / Bobrovskaya, A. N.; Simonov, P. A.; Bukhtiyarov, A. V. et al.

In: Catalysis in Industry, Vol. 10, No. 4, 01.10.2018, p. 279-287.

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

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@article{e22cbfd5af534e5eadcbce03c922c3a5,

title = "Synthesis of Hydroxylamine Sulfate via NO Hydrogenation over Pt/Graphite Catalysts. I: Physicochemical State of Platinum Particles and the Surface of the Support in the Catalysts",

abstract = "The physicochemical state of supported platinum and the surface of the support is studied for a number of industrial 0.5 wt % Pt/graphite (freshly prepared, after the synthesis of hydroxylamine sulfate via NO hydrogenation in sulfuric acid, and regenerated) by scanning electron microscopy (SEM), transmission electron microscopy(TEM), X-ray diffraction, X-ray photoelectron spectroscopy (XPS), and CO chemisorption. It is shown that platinum particles agglomerate in a catalyst during operation, and its regeneration results in finer dispersity of the supported metal. Despite the common opinion that a platinum surface is modified by sulfur during the synthesis or regeneration of such catalysts, no evidence of this is found via XPS. Data showing that the surface nitrogen-containing graphite groups formed during the preparation of a catalyst are responsible for the modification of the absorption properties of platinum particles with respect to CO are obtained for the first time. The latter seems to be one of the factors that influence the catalytic properties of platinum in NO hydrogenation.",

keywords = "dispersity, hydroxylamine synthesis, platinum catalysts, preparation of catalysts, regeneration of catalysts, surface chemistry, NITRIC-OXIDE, XPS",

author = "Bobrovskaya, {A. N.} and Simonov, {P. A.} and Bukhtiyarov, {A. V.} and Kvon, {R. I.} and Rudina, {N. A.} and Romanenko, {A. V.} and Khodorchenko, {V. M.}",

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

year = "2018",

month = oct,

day = "1",

doi = "10.1134/S2070050418040025",

language = "English",

volume = "10",

pages = "279--287",

journal = "Catalysis in Industry",

issn = "2070-0504",

publisher = "Maik Nauka-Interperiodica Publishing",

number = "4",

}

RIS

TY - JOUR

T1 - Synthesis of Hydroxylamine Sulfate via NO Hydrogenation over Pt/Graphite Catalysts. I

T2 - Physicochemical State of Platinum Particles and the Surface of the Support in the Catalysts

AU - Bobrovskaya, A. N.

AU - Simonov, P. A.

AU - Bukhtiyarov, A. V.

AU - Kvon, R. I.

AU - Rudina, N. A.

AU - Romanenko, A. V.

AU - Khodorchenko, V. M.

PY - 2018/10/1

Y1 - 2018/10/1

N2 - The physicochemical state of supported platinum and the surface of the support is studied for a number of industrial 0.5 wt % Pt/graphite (freshly prepared, after the synthesis of hydroxylamine sulfate via NO hydrogenation in sulfuric acid, and regenerated) by scanning electron microscopy (SEM), transmission electron microscopy(TEM), X-ray diffraction, X-ray photoelectron spectroscopy (XPS), and CO chemisorption. It is shown that platinum particles agglomerate in a catalyst during operation, and its regeneration results in finer dispersity of the supported metal. Despite the common opinion that a platinum surface is modified by sulfur during the synthesis or regeneration of such catalysts, no evidence of this is found via XPS. Data showing that the surface nitrogen-containing graphite groups formed during the preparation of a catalyst are responsible for the modification of the absorption properties of platinum particles with respect to CO are obtained for the first time. The latter seems to be one of the factors that influence the catalytic properties of platinum in NO hydrogenation.

AB - The physicochemical state of supported platinum and the surface of the support is studied for a number of industrial 0.5 wt % Pt/graphite (freshly prepared, after the synthesis of hydroxylamine sulfate via NO hydrogenation in sulfuric acid, and regenerated) by scanning electron microscopy (SEM), transmission electron microscopy(TEM), X-ray diffraction, X-ray photoelectron spectroscopy (XPS), and CO chemisorption. It is shown that platinum particles agglomerate in a catalyst during operation, and its regeneration results in finer dispersity of the supported metal. Despite the common opinion that a platinum surface is modified by sulfur during the synthesis or regeneration of such catalysts, no evidence of this is found via XPS. Data showing that the surface nitrogen-containing graphite groups formed during the preparation of a catalyst are responsible for the modification of the absorption properties of platinum particles with respect to CO are obtained for the first time. The latter seems to be one of the factors that influence the catalytic properties of platinum in NO hydrogenation.

KW - dispersity

KW - hydroxylamine synthesis

KW - platinum catalysts

KW - preparation of catalysts

KW - regeneration of catalysts

KW - surface chemistry

KW - NITRIC-OXIDE

KW - XPS

UR - http://www.scopus.com/inward/record.url?scp=85060172408&partnerID=8YFLogxK

U2 - 10.1134/S2070050418040025

DO - 10.1134/S2070050418040025

M3 - Article

AN - SCOPUS:85060172408

VL - 10

SP - 279

EP - 287

JO - Catalysis in Industry

JF - Catalysis in Industry

SN - 2070-0504

IS - 4

ER -

ID: 19262449

Synthesis of Hydroxylamine Sulfate via NO Hydrogenation over Pt/Graphite Catalysts. I: Physicochemical State of Platinum Particles and the Surface of the Support in the Catalysts

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