Editor's note: According to a recent report from the physicist organization network, researchers at the University of Glasgow in the United Kingdom have succeeded in separating hydrogen and oxygen from water by using the electron-coupled proton buffer (ECPB) method. Cost-scale production of hydrogen.
Hydrogen is an important energy source that can generate electricity when it is burned, and unlike fossil fuels, it can have a bad impact on the environment. By decomposing water, it is a clean way to obtain hydrogen. Through photosynthesis, plants can use the energy of the sun to break down water molecules into hydrogen and oxygen.
Inspired by this, researchers at the University of Glasgow in the UK imitated plant photosynthesis and successfully separated hydrogen and oxygen from water using the electron-coupled proton buffer (ECPB) method. This is a clean, cheap and renewable hydrogen energy production method.
The development of clean energy or alternative new energy is the world trend of future energy construction, of which hydrogen energy is the best choice. Since the combination of hydrogen and oxygen does not produce pollutants such as carbon dioxide, sulfur dioxide and soot, hydrogen is regarded as the ideal clean energy in the future, known as the "future oil".
For a long time, scientists provided positive and negatively charged electrodes to provide direct current electrolysis process, decomposing water to produce hydrogen and oxygen, but the pure hydrogen produced by this industrial production process requires expensive equipment and strict supervision to ensure that the gas is not mixed. In order to change this situation, scientists from all over the world have made efforts to continuously update the technology on the original basis or develop new technologies to achieve the purpose of extracting hydrogen.
In 2007, scientists from the Pennsylvania State University in the United States recently published an article in the "Nano Express" that a thin film composed of an array of vertically aligned iron-titanium oxide nanotubes can decompose water into hydrogen and hydrogen under the sunlight. oxygen. This new photoelectrolytic water technology is inexpensive, has little pollution, and can be continuously improved.
In 2009, researchers from Ohio State University launched a new technology on July 3, using an inexpensive nickel catalyst, which can directly convert urea into pure hydrogen through electrochemical oxidation. During the conversion process, urea molecules are adsorbed on the surface of the nickel electrode, which can be decomposed by the required electrons, and pure hydrogen is generated at the cathode. In addition, nitrogen and trace oxygen react with potassium hydroxide in the solution to produce potassium carbonate. The technology can be applied to the production of hydrogen and can be used to purify wastewater.
In the same year, after eight years of independent research and development, Chinese researchers successfully developed new equipment and replaced the shielded electric pump and flow metering system with large power consumption in the way of natural circulation of electrolyte, thereby greatly reducing power consumption. At the same time, because the new cooling system it uses can directly use the surface water of rivers, rivers, lakes or industrial water for cooling, its water consumption is also greatly saved. Take the example of an equipment that produces 10 cubic meters of hydrogen per hour. Compared with traditional equipment, the company's new equipment can save 50,000 kWh per year, save 150,000 cubic meters of water, and reduce sewage discharge by 150,000 cubic meters.
Now, the success of British scientists may not be far from achieving low-cost and large-scale production of hydrogen. Dr. Mark Symes of the University of Glasgow, UK, said: "The system we developed can produce hydrogen on an industrial scale, which is cheaper and safer than the current method. Most of the hydrogen currently produced depends on fossil fuels in industrial production, but If electricity is provided by solar, wind or wave energy, an almost completely clean source of power can be created. "
"ECPB is made from commercially available phosphomolybdic acid. The properties of this material allow the collection and storage of protons and electrons produced by the decomposition of water, with oxygen as the only gaseous product. The stored protons and electrons can then be used to produce hydrogen To successfully achieve the separation of hydrogen and oxygen, it is easy to produce the pure hydrogen needed. Using a single precious metal electrode and ECPB to produce hydrogen and oxygen from water will produce hydrogen on a larger scale and more economically than existing methods.
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