Progress has been made in the application of graphite alkyne as catalyst in Qingdao Energy
As an important reaction process in fuel cells and metal-air batteries, oxygen reduction reactions have drawn much attention. The traditional oxygen reduction reaction catalysts are platinum-based catalysts, which are expensive and cost more than 55% of the total cost of the fuel cell stack. , Researchers have prepared a series of non-precious metal catalysts to replace the precious metal platinum, of which carbon-based catalysts for attention due to their low cost, high stability, rich reserves, and strong resistance to carbon monoxide and methanol.Recently, Chinese Academy of Sciences Qingdao Institute of Bioenergy and Process New Energy Carbon Materials team developed a nitrogen-doped graphite acetylene material for oxygen reduction reaction, showing excellent catalytic properties, the relevant research published in the ACS Applied Materials & Interfaces.
Graphite alkyne is a new kind of carbon material, which is composed of acetylenic bonds and benzene rings, has special sp hybridized carbon atoms and has been reported to exhibit excellent properties in photocatalysis, electrocatalysis and biology.New energy carbon On the basis of the previous work, the materials team continued to understand the charge structure of graphite alkyne materials and utilized the unique acetylenic bond of graphite alkyne materials to cause the positive charge of some carbon atoms in the carbon skeleton. Through the nitrogen modification, the graphite alkyne material was successfully used Which is used in the oxygen reduction electrocatalytic reaction and shows excellent catalytic performance for oxygen reduction.When the carbon atom in graphite alkyne is substituted by nitrogen, the charge structure will be controlled and the carbon atom adjacent to nitrogen will show stronger positive charge, Can be used as the active center of the oxygen reduction reaction.Because the graphite alkyne material has special sp hybridized carbon atoms different from the conventional carbon materials (graphene, carbon nanotubes, graphite, amorphous carbon, etc.), nitrogen atoms can be replaced by sp hybridization Carbon, get a new nitrogen doping mode, the theoretical and experimental results show that this new doping mode can effectively improve the catalytic performance of carbon materials obtained by the nitrogen-substituted graphite alkyne material Oxygen reduction catalytic performance comparable with commercial carbon supported platinum catalyst This work breaks through the current research focus on sp and sp2 hybrid carbon material limits show that graphite alkyne in electrocatalytic materials and fuel cells tremendous application prospects, Oxygen reduction reaction of platinum and other noble metal catalysts high cost and limited reserves, providing an important solution.
Research has won the support of the National Natural Science Foundation of China, the CAS Frontier Scientific Research Program, the Chinese Academy of Sciences' Hundred Talents Program, and the Natural Science Foundation of Shandong Province Outstanding Youth Fund.