According to a report by the British Broadcasting Corporation (BBC) on August 12 (Beijing time), American scientists wrote in the "Science" magazine published on August 12th that they have developed a man-made enzyme that is comparable to natural enzymes. To speed up the chemical reaction of hydrogen production by 10 times, the latest research is expected to speed up the hydrogen production process and reduce costs.
Hydrogen is a kind of "multi-talented" energy carrier, which can be obtained from many energy sources such as wind energy, solar energy and biomass, and applied in many aspects. The key to hydrogen energy utilization process is to first convert electricity into chemical energy and store it. Demand will release it. But the main problem facing the scientific community today is how to make the hydrogen production reaction happen quickly and cheaply in order to achieve scale.
In any place where electricity is available (at home), people can use water to make hydrogen, and then use a fuel cell to convert hydrogen back to electricity. The only by-product obtained is water. However, fuel cells require a catalyst to accelerate the conversion of hydrogen into water and electricity. Platinum performs well in this regard, but platinum is very expensive and scarce.
As early as more than one billion years ago, some microorganisms could use cheap and abundant nickel and iron to make a natural enzyme. Later, people discovered that this natural enzyme can complete the conversion of hydrogen energy and electrical energy. However, American scientists have recently developed a man-made enzyme that performs better than natural enzymes. Experiments show that in the complex chemical reaction of hydrogen production with water, the new man-made enzymes perform quite brilliantly, and the reaction rate is 10 times that of using natural enzymes, which can produce 100,000 hydrogen molecules per second.
The research collaborator Morris Bullock, a scientist at the U.S. Department of Energy's Northwest Pacific National Laboratory, said: "This nickel-based catalyst is really very powerful."
Although the catalytic efficiency of this enzyme is higher, at present, if large-scale promotion of this process is desired, it still needs to consume a large amount of electric energy. However, the author wrote in the paper: "The experimental results highlight the enormous potential of molecular catalysts in hydrogen production."
Scientists said that if we can use iron and nickel to make artificial enzymes, the whole process will be cheaper and we hope to produce cheaper hydrogen.
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