Hydrogen energy is a clean, renewable energy source that can be made from electrolyzed water. However, the electrolysis of water for hydrogen production requires the use of platinum as a catalyst. The scarcity of this precious metal has restricted the long-term development of hydrogen production from electrolyzed water and has kept its cost high. French researchers recently used cobalt to synthesize two new materials that could replace platinum catalysts, making it possible to reduce the cost of hydrogen energy production. The catalyst used to increase the efficiency of electrolyzed water should be as active as a platinum catalyst. Since hydrogen production from electrolyzed water involves both the generation of hydrogen and the generation of oxygen, the catalyst must be able to operate in a neutral to alkaline environment in order to function in both reactions. Researchers at the French Atomic Energy Commission and the French National Research Center and other institutions recently reported in British academic journals Natural Materials and Nature Chemistry that they successfully synthesized two cobalt catalysts that can work in a neutral environment. One is composed of cobalt nanoparticles, which have two different forms that can catalyze the reaction to generate hydrogen and generate oxygen, respectively. The catalyst can be converted between these two forms and become a non-precious metal-free switchable catalyst. Researchers are currently working hard to integrate the two new, lower-cost materials into artificial photosynthesis technologies to explore ways to use water and solar energy to obtain hydrogen energy. (Reporter Huang Han)
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France is expected to reduce the cost of hydrogen energy production