Nickel-cobalt bimetallic anode catalysts for direct urea fuel cell
نویسندگان
چکیده
Nickel is an ideal non-noble metal anode catalyst for direct urea fuel cell (DUFC) due to its high activity. However, there exists a large overpotential toward urea electrooxidation. Herein, NiCo/C bimetallic nanoparticles were prepared with various Co contents (0, 10, 20, 30 and 40 wt%) to improve the activity. The best Co ratio was 10% in the aspect of cell performance, with a maximum power density of 1.57 mW cm(-2) when 0.33 M urea was used as fuel, O2 as oxidant at 60 °C. The effects of temperature and urea concentration on DUFC performance were investigated. Besides, direct urine fuel cell reaches a maximum power density of 0.19 mW cm(-2) with an open circuit voltage of 0.38 V at 60 °C.
منابع مشابه
Pt-Ni and Pt-M-Ni (M = Ru, Sn) Anode Catalysts for Low-Temperature Acidic Direct Alcohol Fuel Cells: A Review
In view of a possible use as anode materials in acidic direct alcohol fuel cells, the electro-catalytic activity of Pt-Ni and Pt-M-Ni (M = Ru, Sn) catalysts for methanol and ethanol oxidation has been widely investigated. An overview of literature data regarding the effect of the addition of Ni to Pt and Pt-M on the methanol and ethanol oxidation activity in acid environment of the resulting bi...
متن کاملMagnetic Modification of Nano-structured Direct Methanol Fuel Cell Anode Catalysts
The anode electro-oxidation of methanol is central to the operation of Direct Methanol Fuel Cells (DMFC), which have the potential to become the fastest growing next generation mobile power sources. While Pt and Pt-based catalysts are known for their effectiveness in methanol activation, they are also most susceptible to catalyst poisoning by reaction intermediates such as CO. A second or even ...
متن کاملSynthesis of MWCNTs Using Monometallic and Bimetallic Combinations of Fe, Co and Ni Catalysts Supported on Nanometric SiC via TCVD
Nanometric Carbid Silicon (SiC) supported monometallic and bimetallic catalysts containing Fe, Co, Ni transition metals were prepared by wet impregnation method. Multiwall carbon nanotubes (MWCNTs) were synthesized over the prepared catalysts from catalytic decomposition of acetylene at 850°C by thermal chemical vapor deposition (TCVD) technique. The synthesized nanomaterials (catalysts and CNT...
متن کاملRole of surface iron in enhanced activity for the oxygen reduction reaction on a Pd3Fe(111) single-crystal alloy.
Applications of polymer electrolyte membrane fuel cells (PEM-FCs) require a continued search for an optimal catalyst with attributes of high activity, durability, low cost, and resistance to negative effects of impurities in the fuel. Platinum-based bimetallic catalyst systems are widely utilized in PEM-FCs because of their good performance in both the cathode and the anode. Alloying with inexp...
متن کاملActivity of platinum/carbon and palladium/carbon catalysts promoted by Ni2 P in direct ethanol fuel cells.
Ethanol is an alternative fuel for direct alcohol fuel cells, in which the electrode materials are commonly based on Pt or Pd. Owing to the excellent promotion effect of Ni2 P that was found in methanol oxidation, we extended the catalyst system of Pt or Pd modified by Ni2 P in direct ethanol fuel cells. The Ni2 P-promoted catalysts were compared to commercial catalysts as well as to reference ...
متن کامل