Published November 2000 | Version v1
Journal article Metadata-only

Redox transformations in the surface layer of complex RBa2Cu3Oy oxides (R = Nd, Ho, Y) and their catalytic properties in CO oxidation

Creators

  • 1. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Khimicheskij Fakul'tet, Moscow (Russian Federation)
  • 2. RAN, Inst. Neftekhimicheskogo Sinteza im. A.V. Topchieva, Moscow (Russian Federation)

Description

Initial stages of redox transformations in the surface layer of complex oxides with the RBa2Cu3Oy (R = Nd, Ho, Y) composition at their reaction with CO and O2 in non-stationary conditions were studied using pulse microcatalytic method. It is demonstrated that weak-connected oxygen is removed, surface layer produced by reduction of RBa2Cu3Oy is formed during interaction of RBa2Cu3Oy (R = Nd, Ho, Y) phases with CO. RBa2Cu3Oy oxides established to be possess of ability to reoxidation following reduction treatment. Principal capability of multicomponent RBa2Cu3Oy volume phase oxygen participation in reaction of catalytic oxidation of CO was shown

Abstract (Russian)

С использованием импульсного микрокаталитического метода исследованы начальные стадии окислительно-восстановительных превращений в поверхностном слое сложных оксидов состава RBa2Cu3Oy (R = Nd, Ho, Y) при их взаимодействии с СО и О2 в нестационарных условиях. Показано, что при взаимодействии фаз RBa2Cu3Oy (R = Y, Ho, Nd) с СО удаляется слабосвязанный кислород, формируется поверхностный слой продуктов восстановления RBa2Cu3Oy. Установлено, что после восстановительной обработки оксиды RBa2Cu3Oy сохраняют способность к реокислению. Показана принципиальная возможность участия кислорода объемной фазы многокомпонентных оксидов RBa2Cu3Oy в реакции каталитического окисления СО

Additional details

Additional titles

Original title (Russian)
Окислительно-восстановительные превращения в поверхностном слое сложных оксидов RBa

Publishing Information

Journal Title
Kinetika i Kataliz
Journal Volume
41
Journal Issue
6
Journal Page Range
p. 878-884
ISSN
0453-8811
CODEN
KNKTA4

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
33016958
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
BARIUM OXIDES; CARBON MONOXIDE; CATALYSIS; CATALYSTS; CHEMICAL COMPOSITION; CHEMICAL REACTION KINETICS; CUPRATES; HOLMIUM OXIDES; LAYERS; NEODYMIUM OXIDES; OXIDATION; OXYGEN; REDOX REACTIONS; SURFACE PROPERTIES; YTTRIUM OXIDES
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; COPPER COMPOUNDS; ELEMENTS; HOLMIUM COMPOUNDS; KINETICS; NEODYMIUM COMPOUNDS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; REACTION KINETICS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS

Optional Information

Notes
10 refs., 7 figs., 1 tab.