Nitrogen Doping of Graphite for Enhancement of Durability of Supported Platinum Clusters

2011 ◽  
Vol 2 (6) ◽  
pp. 577-580 ◽  
Author(s):  
Takahiro Kondo ◽  
Tetsuya Suzuki ◽  
Junji Nakamura
Keyword(s):  
Nitrogen Doping ◽  
Supported Platinum ◽  
Platinum Clusters

scholarly journals Structurally simple supported platinum clusters prepared from [Pt15(CO)30]2- on magnesium oxide

1992 ◽  
Vol 114 (16) ◽  
pp. 6460-6466 ◽  
Author(s):  
J. R. Chang ◽  
D. C. Koningsberger ◽  
B. C. Gates
Keyword(s):  
Magnesium Oxide ◽  
Supported Platinum ◽  
Platinum Clusters

Thermal Stability of Supported Platinum Clusters Studied by in Situ GISAXS

2004 ◽  
Vol 108 (47) ◽  
pp. 18105-18107 ◽  
Author(s):  
Randall E. Winans ◽  
Stefan Vajda ◽  
Byeongdu Lee ◽  
Stephen J. Riley ◽  
Sönke Seifert ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Supported Platinum ◽  
Platinum Clusters ◽  
Thermal Stability Of

The Electronic Interaction of Pt-Clusters with ITO and HOPG Surfaces upon Water Adsorption

2014 ◽  
Vol 228 (4-5) ◽  
Author(s):  
Joachim Klett ◽  
Stephan Krähling ◽  
Benjamin Elger ◽  
Rolf Schäfer ◽  
Bernhard Kaiser ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Catalytic Efficiency ◽  
Catalytic Performance ◽  
Substrate Material ◽  
Binding Energies ◽  
Electronic Interaction ◽  
Support Materials ◽  
Platinum Cluster ◽  
Supported Platinum ◽  
Platinum Clusters

AbstractIn order to investigate the catalytic properties of supported platinum clusters, their interaction with water was monitored using photoelectron spectroscopy. The clusters were exposed to up to five Langmuir of water at cryogenic temperatures. Additionally, the influence of the substrate was studied by employing HOPG and ITO as complementary support materials. In contrast to bulk platinum a distinct chemical shift is observable in the Pt4f binding energies for Pt clusters deposited on ITO. The same clusters on HOPG show no changes in binding energy. We propose that this trend is due to a change in the surface Fermi level in ITO, hence highlighting the strong interaction between the platinum cluster and the substrate material. Therefore it is reasonable to assume, that the catalytic efficiency of these clusters in general can not solely be described by the electronic structure of the cluster alone, but that also the electronic changes induced in the substrate may have a major impact on the catalytic performance as well.

One-Step Flame-Synthesis of Carbon-Embedded and -Supported Platinum Clusters

2008 ◽  
Vol 20 (6) ◽  
pp. 2117-2123 ◽  
Author(s):  
Frank O. Ernst ◽  
Robert Büchel ◽  
Reto Strobel ◽  
Sotiris E. Pratsinis
Keyword(s):  
Flame Synthesis ◽  
Supported Platinum ◽  
Platinum Clusters ◽  
One Step

Transformation of Atomically Dispersed Platinum in SAPO-37 into Platinum Clusters: Catalyst for Ethylene Hydrogenation

2021 ◽  
Author(s):  
Jorge E. Perez-Aguilar ◽  
James Hughes ◽  
Cong-Yan Chen ◽  
Bruce C Gates
Keyword(s):  
Infrared Spectra ◽  
Molecular Sieve ◽  
Platinum Catalysts ◽  
Ethylene Hydrogenation ◽  
Supported Platinum ◽  
Supported Platinum Catalysts ◽  
Platinum Clusters

Atomically dispersed supported platinum catalysts were synthesized by the reaction of Pt(acac)2 (acac = acetylacetonato) with the silicoaluminophosphate molecular sieve SAPO-37, with infrared spectra showing that the reaction involved SAPO...

scholarly journals METHANE LIQUEFACTION: Selective Conversion of Methane to Cyclohexane via Efficient Surface-Hydrogen-Transfer Catalyzed by GaN-Supported Platinum Clusters

2021 ◽  
Author(s):  
Li-Da Tan ◽  
Hui Su ◽  
Jingtan Han ◽  
Mingxin Li ◽  
Chao-Jun Li
Keyword(s):  
Hydrogen Transfer ◽  
Ambient Pressure ◽  
Chemical Research ◽  
Methane Aromatization ◽  
Surface Hydrogen ◽  
Platinum Cluster ◽  
Supported Platinum ◽  
Conversion Of Methane ◽  
Platinum Clusters

Abstract Non-oxidative liquefaction of methane at room temperature and ambient pressure has long been a scientific “holy grail” of chemical research. In this report, we exploit an unprecedented catalytic transformation of methane exclusively to cyclohexane through effective surface-hydrogen-transfer (SHT) at the heterojunctions boundary consisting of electron-rich platinum cluster (Pt) loaded on methane-activating gallium nitride (GaN) host. The experimental analysis demonstrates that interface-induced overall reaction starts with methane aromatization to benzene initiated by the Ga-N pairs, followed by hydrogenation of benzene to cyclohexane via hydrogen transfer. The in-situ activated hydrogen at electron-rich metal Pt cluster plays a key role for the hydrogenation and enables an outstanding selectivity (as high as 89 %) towards cyclohexane, which is well-delivered even after 5 recycling runs.

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