Reduced Titanium Oxide as Carbon-Free Support of Non-Precious Metal Oxide-Based Cathodes for PEFCs

2016 ◽  
Vol 75 (14) ◽  
pp. 863-868 ◽  
Author(s):  
H. Igarashi ◽  
A. Ishihara ◽  
T. Nagai ◽  
S. Tominaka ◽  
K. Matsuzawa ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Titanium Oxide ◽  
Precious Metal

Non-precious Metal Oxide and Metal-free Catalysts for Energy Storage and Conversion

2016 ◽  
pp. 243-320
Author(s):  
Tahereh Jafari ◽  
Andrew G. Meguerdichian ◽  
Ting Jiang ◽  
Abdelhamid El-Sawy ◽  
Abdelhamid El-Sawy ◽  
...  
Keyword(s):  
Energy Storage ◽  
Metal Oxide ◽  
Precious Metal ◽  
Energy Storage And Conversion ◽  
Metal Free

Progress in non-precious metal oxide-based cathode for polymer electrolyte fuel cells

2010 ◽  
Vol 55 (27) ◽  
pp. 8005-8012 ◽  
Author(s):  
Akimitsu Ishihara ◽  
Yoshiro Ohgi ◽  
Koichi Matsuzawa ◽  
Shigenori Mitsushima ◽  
Ken-ichiro Ota
Keyword(s):  
Fuel Cells ◽  
Metal Oxide ◽  
Polymer Electrolyte ◽  
Precious Metal ◽  
Polymer Electrolyte Fuel Cells

Mechanically Alloyed and Spark Plasma Sintered Aluminium/Precious Metal Oxide Composite Materials

2010 ◽  
Vol 638-642 ◽  
pp. 1824-1829
Author(s):  
Masahiro Kubota ◽  
Pavel Cizek
Keyword(s):  
Metal Oxide ◽  
Chemical Reactions ◽  
Precious Metal ◽  
Applied Pressure ◽  
Pure Aluminium ◽  
Mechanically Alloyed ◽  
Composite Powders ◽  
Oxide Composite ◽  
Spark Plasma ◽  
Ma Process

Air-atomised pure aluminium powder with additions of 10 at.% of AgO, PtO2 or PdO was mechanically alloyed (MAed) by using a vibrational ball mill, and MAed powders were consolidated into bulk materials by a spark plasma sintering (SPS) process. Mechano-chemical reactions among pure Al, precious metal oxide and stearic acid, added as a process control agent, during the mechanical alloying (MA) process and subsequent heat treatments were investigated by X-ray diffraction. The mechanical properties of MAed powders obtained under various heat treatment conditions and those of the SPS materials were evaluated by hardness tests. Mechano-chemical reactions occurred in Al/precious metal oxide composite powders during 36 ks of the MA process to form AlAg2, Pt and Al3Pd2 for the Al-AgO, Al-PtO2 and Al-PdO systems, respectively. Further solid-state reactions in MAed powders have been observed after heating at 373 K to 873 K for 7.2 ks. The hardness of MAed powders initially increased significantly after heating at 373 K and then generally decreased with increasing heating temperatures. The full density was obtained for the SPS materials under the conditions of an applied pressure of 49 MPa at 873 K for 3.6 ks. All the SPS materials exhibited hardness values of over 200 HV in the as-fabricated state.

METAL OXIDE TRIALKYLSILYLOXIDE POLYMERS (POLYTRIALKYLSILOXANOMETALLOXANES): PART I. TITANIUM OXIDE TRIMETHYLSILYLOXIDE POLYMERS

1963 ◽  
Vol 41 (3) ◽  
pp. 629-635 ◽  
Author(s):  
D. C. Bradley ◽  
C. Prevedorou-Demas
Keyword(s):  
Molecular Weight ◽  
Metal Oxide ◽  
Titanium Oxide ◽  
Degree Of Polymerization ◽  
Average Degree ◽  
Degree Of Hydrolysis ◽  
Controlled Conditions

Tetrakis-(trimethylsilyloxy)-titanium Ti(OSiMe3)4 has been hydrolyzed under controlled conditions in dioxane. The initial products of hydrolysis undergo facile disproportionation, e.g. 3Ti2O(OSiMe3)6 → 4Ti(OSiMe3)4 + polymeric Ti2O3(OSiMe3)2. Molecular weight determinations were made on the titanium oxide trimethylsilyloxide polymers (polytrimethylsiloxanotitanoxanes) obtained by thermal disproportionation. Structures have been suggested for the polymers on the basis of the variation of number-average degree of polymerization with the degree of hydrolysis.

scholarly journals A promising fuel cell catalyst using non-precious metal oxide

2018 ◽  
Vol 464 ◽  
pp. 012002
Author(s):  
Hamdy F M Mohamed ◽  
E E Abdel-Hady ◽  
M F M Hmamm ◽  
M Ibrahim ◽  
H Ahmed ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Metal Oxide ◽  
Precious Metal ◽  
Fuel Cell Catalyst
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