The Researches Of Copper Based Nanomaterials For Electrochemical Reduction Of Carbon Dixoide

The large-scale consumption of fossil fuels not only poses a serious energy crisis,but also can cause the sharp rise in concentration of CO₂ in the atmosphere,this gives rise to a series of shocking environmental problems.One promising strategy to alleviate this concern is to convert CO₂ into useful fuel,so as to realize the recycling of resources.Electrochemicl reduction of carbon dioxide as a new discipline has been recently attracted a lot of researchers' attention at home and abroad,the main reason is that the reaction process is simple,environmental protection and high energy utilization.To date,copper is the only one catalyst that can convert convert CO₂ into hydrocarbons has draw the most widespread attention.Combining the present research situation most copper catalyst have a mediocre catalytic effect on electrochemical reduction of carbon dioxide due to the poor selectivity and activity.To deal with the two common problems,we designed these copper based catalysts to improve the catalytic activity and selectivity.The main research contents and results are as follows:?1?We synthesized different morphologies of Cu O nanomaterials including naowire,nanoflake and mircosphere through a simple water bath method.Cu O nanowires exhibited the highest activity with these nanomaterials were applied to CO₂ reduction.This activity difference can be attributed to different surface morphologies of nanomaterials.Therefore,it can be adjusted electrocatalytic activity by changing the morphologies of nanomaterial.?2?A simple oil bath method was applied to prepare three-dimensional copper interconnected network nanowires gel.Considering the state of a single CO₂ molecule in the whole reduction reaction,The advantage of this structure was that more CO₂ could diffuse into the catalyst before reaction,and it provided a large number of active sites for CO₂ molecule to improve reaction activity during reaction simultaneously the products could also be transported out of it freely after reaction.Also it was verified the reasonableness of the designed catalyst from the point of view of molecular reaction mechanism.