scholarly journals Preparation and Electrocatalytic Characteristics Research of Pd/C Catalyst for Direct Ethanol Fuel Cell

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Qiao Xia Li ◽  
Ming Shuang Liu ◽  
Qun Jie Xu ◽  
Hong Min Mao
Keyword(s):  
Fuel Cell ◽  
Average Particle Size ◽  
Active Surface ◽  
Carbon Support ◽  
Catalytic Performance ◽  
Active Surface Area ◽  
Average Particle ◽  
Ethanol Fuel ◽  
Direct Ethanol Fuel Cell ◽  
Electrochemical Active Surface Area

Two kinds of carbon-support 20% Pd/C catalysts for use in direct ethanol fuel cell (DEFC) have been prepared by an impregnation reduction method using NaBH4and NaH2PO2as reductants, respectively, in this study. The catalysts were characterized by XRD and TEM. The results show that the catalysts had been completely reduced, and the catalysts are spherical and homogeneously dispersed on carbon. The electrocatalytic activity of the catalysts was investigated by electrochemical measurements. The results indicate that the catalysts had an average particle size of 3.3 nm and showed the better catalytic performance, when NaBH4was used as the reducing agent. The electrochemical active surface area of Pd/C (NaBH4) was 56.4 m2·g−1. The electrochemical activity of the Pd/C (NaBH4) was much higher than that of Pd/C (NaH2PO2).

Synthesis of Pt nanoparticles with preferential (1 0 0) orientation directly on the carbon support for Direct Ethanol Fuel Cell

2016 ◽  
Vol 342 ◽  
pp. 67-74 ◽  
Author(s):  
R.M. Antoniassi ◽  
L. Otubo ◽  
J.M. Vaz ◽  
A. Oliveira Neto ◽  
E.V. Spinacé
Keyword(s):  
Fuel Cell ◽  
Pt Nanoparticles ◽  
Carbon Support ◽  
Ethanol Fuel ◽  
Direct Ethanol Fuel Cell

scholarly journals Comparison of the Effect of Polypyrimidine on Catalytic Performance of Polypyrimidine/CNT as Fuel Cell Catalyst Carrier

2019 ◽  
Author(s):  
Naziermu Dongmulati ◽  
Caijin Shi ◽  
Xieraili Maimaitiyiming
Keyword(s):  
Carbon Nanotubes ◽  
Fuel Cell ◽  
Active Sites ◽  
Active Surface ◽  
Catalytic Performance ◽  
Active Surface Area ◽  
Catalyst Carrier ◽  
Fuel Cell Catalyst ◽  
Platinum Particles ◽  
New Type

A new type π-conjugated poly(2,5-didodecyloxy-1,4-diethynyl-phenylene-alt-2-methyl-4,6-pyrimidine) was prepared by Sonogashira polycondensation. A fuel cell catalyst is prepared by depositing platinum particles on carbon nanotubes which was modified with poly(2,5-didodecyloxy-1,4-diethynyl-phenylene-alt-2-methyl-4,6-pyrimidine) and the previously reported poly(2,5-didodecyloxy-1,4-diethynyl-phenylene-alt-2-amino-4,6-pyrimidine). After comparing the two catalysts, it is found that active sites and catalytic performance of catalysts are significantly influenced by the copolymer on the carbon nanotubes which was the catalysis carrier. The electrochemically active surface area (ECSA) of catalysts containing poly(2,5-didodecyloxy-1,4-diethynyl-phenylene-alt-2-methyl-4,6-pyrimidine) was calculated to be 25.5 m2 g-1, which is higher than the ECSA of the poly(2,5-didodecyloxy-1,4-diethynyl-phenylene-alt-2-amino-4,6-pyrimidine) containing catalyst (18.2 m2 g-1). And the first polymer provides better methanol oxidizability and durability than second polymer for catalyst.

scholarly journals Effects of Environmental Conditions on Cathode Degradation of Polymer Electrolyte Fuel Cell during Potential Cycle

2019 ◽  
Vol 10 (2) ◽  
pp. 24
Author(s):  
Yoshiyuki Hashimasa ◽  
Hiroshi Daitoku ◽  
Tomoaki Numata
Keyword(s):  
Fuel Cell ◽  
Active Surface ◽  
Carbon Support ◽  
Load Cycle ◽  
Polymer Electrolyte Fuel Cell ◽  
Active Surface Area ◽  
Test Protocol ◽  
Carbon Corrosion ◽  
Durability Test ◽  
Cathode Degradation

We investigated the effects of cell temperature and the humidity of gas supplied to the cell during the load cycle durability test protocol recommended by The Fuel Cell Commercialization Conference of Japan (FCCJ). Changes in the electrochemically active surface area (ECA) and in the amount of carbon support corrosion were examined by using the JARI standard single cell. The ECA declined more quickly when the gas humidity was raised, and the carbon corrosion was at the same level. These results suggest that the agglomeration of platinum was accelerated by the same agglomeration mechanism, i.e., by raising the humidity of the gas supplied to the cell.

The Effect of Alloying in Pt-Sn/C Electrocatalysts in the Performance of a Direct Ethanol Fuel Cell

2014 ◽  
Vol 64 (3) ◽  
pp. 1139-1145
Author(s):  
F. Colmati ◽  
R. Sousa ◽  
E. G. Ciapina ◽  
E. R. Gonzalez
Keyword(s):  
Fuel Cell ◽  
Ethanol Fuel ◽  
Direct Ethanol Fuel Cell ◽  
Effect Of Alloying

Nitrocellulose Catalyzed With Manganese Oxide Nanoparticles: Advanced Energetic Nanocomposite With Superior Decomposition Kinetics

2021 ◽  
Author(s):  
Sherif Elbasuney ◽  
M. Yehia ◽  
Shukri Ismael ◽  
Yasser El-Shaer ◽  
Ahmed Saleh
Keyword(s):  
Activation Energy ◽  
Particle Size ◽  
Manganese Oxide ◽  
Energetic Materials ◽  
Average Particle Size ◽  
Active Surface ◽  
Propagation Rate ◽  
Hydroxyl Groups ◽  
Average Particle ◽  
Decomposition Enthalpy

Abstract Nanostructured energetic materials can fit with advanced energetic first-fire, and electric bridges (microchips). Manganese oxide, with active surface sites (negatively charged surface oxygen, and hydroxyl groups) can experience superior catalytic activity. Manganese oxide could boost decomposition enthalpy, ignitability, and propagation rate. Furthermore manganese oxide could induce vigorous thermite reaction with aluminium particles. Hot solid or liquid particles are desirable for first-fire compositions. This study reports on the facile fabrication of MnO2 nanoparticles of 10 nm average particle size; aluminium nanoplates of 100 nm average particle size were employed. Nitrocellulose (NC) was adopted as energetic polymeric binder. MnO2/Al particles were integrated into NC matrix via co-precipitation technique. Nanothermite particles offered an increase in NC decomposition enthalpy by 150 % using DSC; ignition temperature was decreased by 8 0C. Nanothemrite particles offered enhanced propagation index by 261 %. Kinetic study demonstrated that nanothermite particles experienced drastic decrease in NC activation energy by - 42, and - 40 KJ mol-1 using Kissinger and KAS models respectively. This study shaded the light on novel nanostructured energetic composition, with superior combustion enthalpy, propagation rate, and activation energy.

scholarly journals Application of a non-noble Fe-N-C catalyst for oxygen reduction reaction in an alkaline direct ethanol fuel cell

2018 ◽  
Vol 115 ◽  
pp. 226-237 ◽  
Author(s):  
Luigi Osmieri ◽  
Ricardo Escudero-Cid ◽  
Alessandro H.A. Monteverde Videla ◽  
Pilar Ocón ◽  
Stefania Specchia
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Ethanol Fuel ◽  
Direct Ethanol Fuel Cell
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