尿素电氧化钴基催化剂研究进展OA

Urea electrooxidation reaction can be used to treat wastewater containing urea and produce hydrogen or electricity,providing a new way for green treatment and resource utilization of source separated urine.The development of efficient and stable catalysts is the key to realizing the electrooxidation of urea.The traditional nickel-based catalyst depends on alkaline conditions and suffers the problems of high generation potential of the active component NiOOH,easy poisoning and inactivation,etc.By contrast,the cobalt-based catalysts can realize the electrooxidation of urea at a relatively low potential under alkaline conditions.Moreover,they can electrochemically mediate Cl-to produce active chlorine to oxidize urea in neutral Cl-containing urine,demonstrating their application potential as catalysts for urea electrooxidation reaction.Based on this,from both alkaline and neutral conditions,the mechanism of urea electrooxidation of cobalt-based catalysts in two reaction environments was illustrated.Furthermore,the development and modification strategies of cobalt electrooxidation catalysts in urea under two kinds of reaction paths were categorically reviewed.Finally,the future directions of cobalt-based catalysts for urea electrooxidation were prospected,providing ideas for the design and construction of novel urea electrooxidation reaction catalysts.