Titanium Oxide/Platinum Catalysis: Charge Transfer from a Titanium Oxide Support Controls Activity and Selectivity in Methanol Oxidation on Platinum

2011 ◽  
Vol 115 (46) ◽  
pp. 22960-22964 ◽  
Author(s):  
Antoine Hervier ◽  
L. Robert Baker ◽  
Kyriakos Komvopoulos ◽  
Gabor A. Somorjai
Keyword(s):  
Charge Transfer ◽  
Titanium Oxide ◽  
Methanol Oxidation ◽  
Platinum Catalysis ◽  
Oxide Support

Electron Holographic Nano-Characterization of Gold Catalyst at Interface

2002 ◽  
Vol 727 ◽  
Author(s):  
S. Ichikawa ◽  
T. Akita ◽  
M. Okumura ◽  
M. Haruta ◽  
K. Tanaka
Keyword(s):  
Contact Angle ◽  
Titanium Oxide ◽  
Gold Catalyst ◽  
Three Dimensional ◽  
High Resolution Electron Microscopy ◽  
Electron Holography ◽  
Gold Particles ◽  
Oxide Support ◽  
The Mean ◽  
A Charge

AbstractThe catalytic properties of nanostructured gold catalyst are known to depend on the size of the gold particles and to be activated when the size decreases to a few nanometers. We investigated the size dependence of the three-dimensional nanostructure on the mean inner potential of gold catalysts supported on titanium oxide using electron holography and high-resolution electron microscopy (HREM). The contact angle of the gold particles on the titanium oxide tended to be over 90° for gold particles with a size of over 5 nm, and below 90° for a size of below 2 nm. This decreasing change in the contact angle (morphology) acts to increase the perimeter and hence the area of the interface between the gold and titanium oxide support, which is considered to be an active site for CO oxidation. The mean inner potential of the gold particles also changed as their size decreased. The value of the inner potential of gold, which is approximately 25 V in bulk state, rose to over 40 V when the size of the gold particles was less than 2 nm. This phenomenon indicates the existence of a charge transfer at the interface between gold and titanium oxide. The 3-D structure change and the inner potential change should be attributed to the specific electronic structure at the interface, owing to both the “nano size effect” and the “hetero-interface effect.”

The Effect of Doping Ce and Fe on the Mn/TiO2 Catalyst for Low Temperature NO Selective Catalytic Reduction with NH3

2012 ◽  
Vol 260-261 ◽  
pp. 1041-1046 ◽  
Author(s):  
Shi Ye Feng ◽  
Pan Gao ◽  
Chang Qing Dong ◽  
Qiang Lu
Keyword(s):  
Iron Oxide ◽  
Low Temperature ◽  
Titanium Oxide ◽  
Catalytic Reduction ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Reduction Of No ◽  
X Ray ◽  
Cerium Oxides ◽  
Oxide Support

A series of manganese-cerium oxide support titanium oxide with different Fe/Ti, Ce/Ti ratio were investigated for selectivity catalytic reduction of NO low at temperature with NH3 as a reducing agent. The catalysts base Mn/TiO2were prepared by sol-gel. The effect of amount of Ce and Fe oxide on the NO conversion of Mn/TiO22was studied. X-ray diffraction (XRD), temperature program desorption (TPD) were carried out. It was known that cerium oxides and iron oxide promoted preformance of Mn/TiO2 for low temperature. because Lewis is mainly take important role in the reaction for low temperature.

scholarly journals Tailored graphenic structures directly grown on titanium oxide boost the interfacial charge transfer

2020 ◽  
Vol 504 ◽  
pp. 144439 ◽  
Author(s):  
Roberto Muñoz ◽  
Carlos Sánchez-Sánchez ◽  
Pablo Merino ◽  
Elena López-Elvira ◽  
Carmen Munuera ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Titanium Oxide ◽  
Interfacial Charge Transfer ◽  
Interfacial Charge

Platinum–titanium alloy catalysts on a Magnéli-phase titanium oxide support for improved durability in Polymer Electrolyte Fuel Cells

2013 ◽  
Vol 223 ◽  
pp. 183-189 ◽  
Author(s):  
Tsutomu Ioroi ◽  
Tomoki Akita ◽  
Masafumi Asahi ◽  
Shin-ichi Yamazaki ◽  
Zyun Siroma ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Titanium Oxide ◽  
Polymer Electrolyte Fuel Cells ◽  
Oxide Support ◽  
Magnéli Phase ◽  
Alloy Catalysts ◽  
Magneli Phase

Mechanism of selective methanol oxidation over vanadium oxide-titanium oxide catalysts: a FT-IR and flow reactor study

1987 ◽  
Vol 91 (20) ◽  
pp. 5263-5269 ◽  
Author(s):  
Guido. Busca ◽  
Ahmed S. Elmi ◽  
Pio. Forzatti
Keyword(s):  
Vanadium Oxide ◽  
Titanium Oxide ◽  
Methanol Oxidation ◽  
Flow Reactor ◽  
Oxide Catalysts ◽  
Ft Ir

High performance Pt/Ti3O5Mo0.2Si0.4 electrocatalyst with outstanding methanol oxidation activity

2019 ◽  
Vol 9 (15) ◽  
pp. 4118-4124 ◽  
Author(s):  
Reza Alipour Moghadam Esfahani ◽  
Reza B. Moghaddam ◽  
E. Bradley Easton
Keyword(s):  
Activation Energy ◽  
Charge Transfer ◽  
Methanol Oxidation ◽  
High Performance ◽  
Charge Transfer Resistance ◽  
Oxidation Activity ◽  
Transfer Resistance ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support

The strong metal–support interaction in Pt/Ti3O5Mo0.2Si0.4 enhances the methanol oxidation activity by decreasing the charge transfer resistance and activation energy.

Tunable Synthesis of N,C-Codoped Ti3+-Enriched Titanium Oxide Support for Highly Durable PEMFC Cathode

ACS Catalysis ◽  
2020 ◽  
Vol 10 (20) ◽  
pp. 12080-12090 ◽  
Author(s):  
Eungjun Lee ◽  
Changmin Park ◽  
Dong Wook Lee ◽  
Gibaek Lee ◽  
Hee-Young Park ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Oxide Support ◽  
Pemfc Cathode
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