Carbon supports for low temperature fuel cell catalysts
Carbon supports for low temperature fuel cell catalysts
... single fuel cell, have to be performed to confirm the good long-term performance of the CNTs as a support for fuel cell catalysts. 3.3. Carbon nanohorns and nanocoils Carbon nanohorns and carbon ... 1000 rpm. Carbon nanocoils were grown at 700 8C for 30 min using C 2 H 4 gas. Few works have been performed on catalysts supported on CNHs or CNCs for use in low- tempera...
Ngày tải lên: 23/04/2014, 22:32
hybrid metal oxide and multiwall carbon nanotube films for low temperature gas sensing
... Sensors and Actuators B 127 (2007) 137–142 Hybrid metal oxide and multiwall carbon nanotube films for low temperature gas sensing E.H. Espinosa a , R. Ionescu a , B. Chambon b , G. Bedis b , ... responsible for long-term drift in metal oxide gas sensors [7,8]. Therefore, a strategy to avoid long-term changes in their response could consist in operating the sen- sors at temperatures...
Ngày tải lên: 19/03/2014, 16:48
Novel design of a compacted micro-structured air-breathing PEM fuel cell as a power source for mobile phones
... the end of the cell width of the electrode. For optimal fuel cell performance, a uniform current density generation is desirable, and this could only be achieved with a non-uniform catalyst distribution, ... role in the performance of air-breathing fuel cells. However, these fuel cell designs have generally relied on traditional planar MEA architecture. Because the majority o...
Ngày tải lên: 05/09/2013, 14:58
Tài liệu Báo cáo khoa học: A systems biology approach for the analysis of carbohydrate dynamics during acclimation to low temperature in Arabidopsis thaliana doc
... slightly lower mean rates of carbon uptake before and during the first day of cold acclimation. After 3 days of cold exposure, the mean rate of carbon uptake was significantly lower for C24 than for ... V (2006) Carbon partitioning and export in transgenic Arabidopsis thaliana with altered capacity for sucrose synthesis grown at low temperature: a role for metabo- lite transpor...
Ngày tải lên: 14/02/2014, 22:20
Báo cáo khoa học: ATPase activity of RecD is essential for growth of the Antarctic Pseudomonas syringae Lz4W at low temperature potx
... syringae at low temperature (4 °C). The very low (but non-zero) ATPase activity of RecD (approxi- mately 8–10% of the wild-type) is able to perform the RecBCD-dependent function at low temperature. Probably, ... essential for growth of the Antarctic Pseudomonas syringae Lz4W at low temperature Ajit K. Satapathy, Theetha L. Pavankumar, Sumana Bhattacharjya, Rajan Sankaranarayan...
Ngày tải lên: 30/03/2014, 04:20
carbon nanotube array thermal interfaces for high temperature silicon carbide devices
... thermocouple readings at each tested temperature and pressure. For all experiments, the samples were allowed to dwell at the set temperature for 30 min to ensure steady-state condi- tions before PA characterization. ... J.E. Raymond, A.E. Brown, G.L. William and B.D. Fahlman, Low- Temperature Growth of Carbon Nanotubes from the Catalytic Decomposition of Carbon Tetrachloride, J...
Ngày tải lên: 06/05/2014, 08:53
Báo cáo y học: "Low temperature tolerance of human embryonic stem cells"
... survived exposure to low temperature for extended durations. Spontaneous differentiation of hESC after exposure to low temperature Following serial passage after exposure to low temperature, the ... correlated to loss of cell viability upon exposure to low temperature. It was observed that some cells detached after exposure to low temperature. Virtually all of the...
Ngày tải lên: 31/10/2012, 16:57
lesson plan 10_unit6-an excursion(reading and listening for low level)
... students will be able to: - get information about some beautiful places in Vietnam. - improve reading comprehension skill. II. Skills: Reading for gist and for specific information III. Methods: Mainly ... poster of information about photos: - Asks Ss to translate the information into Vietnamese by matching each box with the given translation - Asks Ss to match the pictures with the info...
Ngày tải lên: 01/07/2013, 01:26
A CFD study of hygro-thermal stresses distribution in tubular-shaped ambient air-breathing PEM micro fuel cell during regular cell operation
... PEM fuel cell design is a tubular-shaped fuel cell. Fuel cell companies and research institutes may have carried out various systematic experimental studies for this type of the fuel cell, for ... PEM micro fuel cell that incorporates the significant physical processes and the key parameters affecting fuel cell performance. The following assumptions are made: (i.)...
Ngày tải lên: 05/09/2013, 14:58
Modeling optimizes PEM fuel cell durability using threedimensional multi-phase computational fluid dynamics model
... degree of the deformation inside the MEA. For an optimum fuel cell performance, and in order to avoid large temperature gradients inside the fuel cell, it is desirable to achieve a uniform current ... from these parametric studies will allow us to identify the critical parameters for fuel cell performance. Results with deferent operating conditions for the cell operat...
Ngày tải lên: 05/09/2013, 14:58