Cidetec Technology Centre’s Energy Department has designed a prototype for a motorised bicycle that works off fuel cells. The project, financed by the Gipuzkoa Provincial Government, involved using a bicycle kindly provided by the ORBEA bicycle manufacturing company and the pedalling action of which is assisted by a motor. The novelty lies in that the battery power source for the motor is substituted by a fuel cell which, for its operation, only needs oxygen from the air and hydrogen contained under pressure in a small tank.
The fuel cell employed is of the PEMFC (polymer electrolyte membrane fuel cell) type, a technology considered to be cutting edge in this field. The fuel cell is, in reality, a series of numerous MEAs (membrane-electrode assembly) layered one on top of each other in order to reach useful power values, given that the voltage generated by each MEA is less than 1 V.
Each MEA is made up of an anodic electrode, where hydrogen molecules break up into protons and electrons. The membrane used enables the passage of protons, but not electrons, thus obliging the latter to travel around an exterior electric circuit made up of the equipment itself that is being supplied with power. Finally, at the cathodic electrode, the electrons recombine with oxygen from air, thus producing water. This involves an electrochemical reaction that does not generate any contaminating waste; there is, thus, no combustion.
Irati Kortabitarte | alfa
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The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
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