On the 13th, the reporter learned from Zhejiang University that Hou Yang, a researcher in the School of Chemical Engineering and Biological Engineering, designed and developed a single element by anchoring highly dispersed nickel single atoms on a nitrogen-sulfur doped porous nanocarbon substrate. The atomic OER catalyst can make the electro- / photoelectric catalytic water splitting oxygen reaction more efficient, thereby improving the efficiency of hydrogen production. This new catalyst can reduce the cost of hydrogen production by 80% and greatly improve the stability of the OER reaction. This achievement has been reported online by the well-known academic journal Nature Communications.
Oxygen generation through water cracking, which in turn forms hydrogen, is the most common hydrogen preparation method. The electro- / photoelectric catalytic oxygen evolution reaction (OER) it produces limits the overall energy conversion efficiency. Previously, researchers have studied metal iridium as a catalyst to improve the reaction efficiency, but its price is very expensive. Therefore, it has become a difficult problem for academics to develop alternatives that ensure catalytic efficiency and are inexpensive.
Hou Yang's group began to analyze the material's atomic structure through bionics methods. They found that there is a metal in the chloroplast-nitrogen coordination porphyrin structure, which can collect solar energy, use photosynthesis oxidation reaction to decompose water, and release oxygen. Hou Yang introduced that they also found nickel-nitrogen coordination doped carbon materials through analysis.
"In this particular structure, four nitrogen atoms 'pull' metal nickel atoms, attracting hydroxide ion adsorption, reducing the difficulty of conversion of various intermediate links, and thus accelerating the precipitation of oxygen." Hou Yang said, the research team innovated Replace a nitrogen atom with a single sulfur atom to further optimize the charge distribution on the surface of the material. At the same time, a special process is used to "anchor" the nickel-nitrogen material on the carbon substrate to avoid the instability of the material and ultimately make This new type of catalyst electrode exhibits excellent electrocatalytic water splitting oxygen activity and stability under alkaline conditions.
"OER oxygen evolution reaction is the core process of water cracking devices and metal-air batteries." Hou Yang said that this achievement may help a new generation of hydrogen-powered vehicles reduce fuel costs on a large scale. (Jiang Yunhong Hengfei Ke Yineng)
Pressure Sensor,Pressure Transducer,Pressure Transducer Sensor,Air Pressure Sensor
Wuxi Winsun Automation Instrument Co., Ltd , https://www.winsunwx.com