Inducing wetting morphologies and increased reactivities of small Au clusters on doped oxide supports

2018 ◽  
Vol 149 (17) ◽  
pp. 174701 ◽  
Author(s):  
Nisha Mammen ◽  
Shobhana Narasimhan
Keyword(s):  
Oxide Supports ◽  
Au Clusters ◽  
Doped Oxide

Structure and composition of metal particles in Pt-Sn/Al2O3 bimetallic catalysts

1990 ◽  
Vol 48 (4) ◽  
pp. 278-279
Author(s):  
A. Sachdev ◽  
J. Schwank
Keyword(s):  
Bimetallic Catalysts ◽  
Bimetallic Catalyst ◽  
Size Structure ◽  
High Surface ◽  
High Surface Area ◽  
Metal Particles ◽  
Alloy Formation ◽  
Particle Size Range ◽  
Oxide Supports ◽  
Petroleum Fractions

Platinum - tin bimetallic catalysts have been primarily utilized in the chemical industry in the catalytic reforming of petroleum fractions. In this process the naphtha feedstock is converted to hydrocarbons with higher octane numbers and high anti-knock qualities. Most of these catalysts contain small metal particles or crystallites supported on high surface area insulating oxide supports. The determination of the structure and composition of these particles is crucial to the understanding of the catalytic behavior. In a bimetallic catalyst it is important to know how the two metals are distributed within the particle size range and in what way the addition of a second metal affects the size, structure and composition of the metal particles. An added complication in the Pt-Sn system is the possibility of alloy formation between the two elements for all atomic ratios.

BSA Au Clusters as a Probe for Enhanced Fluorescence Detection Using Multipulse Excitation Scheme

2014 ◽  
Vol 14 (13) ◽  
pp. 1139-1144 ◽  
Author(s):  
Sangram Raut ◽  
Ryan Rich ◽  
Rafal Fudala ◽  
R. Kokate ◽  
J.D. Kimball ◽  
...  
Keyword(s):  
Fluorescence Detection ◽  
Enhanced Fluorescence ◽  
Excitation Scheme ◽  
Au Clusters

scholarly journals Electron donation of non-oxide supports boosts O2 activation on nano-platinum catalysts

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tao Gan ◽  
Jingxiu Yang ◽  
David Morris ◽  
Xuefeng Chu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Pt Nanoparticles ◽  
Catalytic Performance ◽  
Nitrogen Vacancy ◽  
Innovative Strategy ◽  
Oxide Supports ◽  
Heterogeneous Catalytic ◽  
Highly Active ◽  
Electron Sink ◽  
Nitrogen Vacancies

AbstractActivation of O2 is a critical step in heterogeneous catalytic oxidation. Here, the concept of increased electron donors induced by nitrogen vacancy is adopted to propose an efficient strategy to develop highly active and stable catalysts for molecular O2 activation. Carbon nitride with nitrogen vacancies is prepared to serve as a support as well as electron sink to construct a synergistic catalyst with Pt nanoparticles. Extensive characterizations combined with the first-principles calculations reveal that nitrogen vacancies with excess electrons could effectively stabilize metallic Pt nanoparticles by strong p-d coupling. The Pt atoms and the dangling carbon atoms surround the vacancy can synergistically donate electrons to the antibonding orbital of the adsorbed O2. This synergistic catalyst shows great enhancement of catalytic performance and durability in toluene oxidation. The introduction of electron-rich non-oxide substrate is an innovative strategy to develop active Pt-based oxidation catalysts, which could be conceivably extended to a variety of metal-based catalysts for catalytic oxidation.

Visualizing light-induced dynamic structural transformations of Au clusters-based photocatalyst via in situ TEM

Nano Research ◽  
2021 ◽  
Author(s):  
Bo Weng ◽  
Youhong Jiang ◽  
Hong-Gang Liao ◽  
Maarten B. J. Roeffaers ◽  
Feili Lai ◽  
...  
Keyword(s):  
Structural Transformations ◽  
In Situ Tem ◽  
Au Clusters

Selective reactive ion etching of phosphorus‐doped oxide over undoped SiO2

1993 ◽  
Vol 11 (2) ◽  
pp. 279-285 ◽  
Author(s):  
David Vender ◽  
Gottlieb S. Oehrlein ◽  
Geraldine C. Schwartz
Keyword(s):  
Reactive Ion Etching ◽  
Ion Etching ◽  
Phosphorus Doped ◽  
Doped Oxide
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