Reversible Transformations of Palladium-Indium Intermetallic Nanoparticles upon Repetitive Redox Treatments in H2/O2

被引：2

作者：

Bukhtiyarov, Andrey V. ^{[1
]}

Panafidin, Maxim A. ^{[1
]}

Prosvirin, Igor P. ^{[1
]}

Smirnova, Nadezhda S. ^{[1
,2
]}

Markov, Pavel V. ^{[1
,2
]}

Baeva, Galina N. ^{[2
]}

Mashkovsky, Igor S. ^{[2
]}

Bragina, Galina O. ^{[2
]}

Vinokurov, Zakhar S. ^{[1
]}

Zubavichus, Yan V. ^{[1
]}

Bukhtiyarov, Valerii I. ^{[1
]}

Stakheev, Alexander Yu. ^{[2
]}

机构：

[1] Boreskov Inst Catalysis, Lavrentieva Ave 5, Novosibirsk 630090, Russia

[2] Zelinsky Inst Organ Chem, Leninsky Prospect 47, Moscow 119991, Russia

来源：

CRYSTALS | 2023年 / 13卷 / 09期

关键词：

PdIn intermetallic compound; selective acetylene hydrogenation; redox treatments; XRD; XPS; DRIFTS CO; SELECTIVE HYDROGENATION; PD-IN; SURFACE SEGREGATION; CO OXIDATION; CATALYTIC PERFORMANCE; ACETYLENE; REDUCTION; ALLOYS; GOLD; DEHYDROGENATION;

D O I：

10.3390/cryst13091356

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The transformations of chemical states and structures occurring in the PdIn/Al2O3 catalyst upon redox treatments in different gaseous atmospheres at different temperatures are addressed by an assortment of in situ bulk- (XRD) and surface-sensitive (XPS and DRIFTS CO) techniques. Any desired state of the catalyst between two opposite extremes of highly dispersed oxide species and regularly ordered PdIn intermetallic compound could be set in fully controlled and reversible ways by selecting appropriate conditions for the reductive treatment starting from the fully oxidized state. Since mutual conversions of multi-atomic Pdn centers into single-site Pd-1 centers are involved in these transformations, the methodology could be used to find an optimum balance between the activity and selectivity of the catalytic system.

引用

页数：16

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