Plasma Modified Layered Double Hydroxide Nanosheets And Its Application In Water Oxidation

With the rapid development of science and technology,the energy crisis and environmental pollution caused by the excessive use of traditional fossil fuels are becoming increasingly serious.Therefore,the development of sustainable regeneration of new energy technology to replace traditional fossil fuels has become urgently need.Electrochemical new energy technology is the most stable and efficient in all kinds of new energy technology.The most representative new electrochemical energy technologies include electrolysis water technology,fuel cell and metal air battery and so on.However,due to the slow kinetic process of oxygen precipitation process in these new energy technologies,the development of high efficient and stable electrochemical oxygen precipitation catalyst is electricity.Precious metal and its oxides?Pt,RuO₂/IrO₂?catalysts have the very high catalytic activity in electric catalytic oxygen evolution reaction.However,due to its expensive,insufficient storage capacity on the earth and the instability in the industrial application seriously restrict its large-scale application.Thus,developing a cheap and efficient new oxygen evolution reaction catalyst attract our attention increasingly.A large number of studies have shown that the cobalt-base material is a class of outstanding and foreground oxygen evolution reaction catalyst.Owing to the unique layered 2D structure and electronic regulation of the block CoFe LDHs nanoscale,the plasma technology is used in this paper.The CoFe LDHs nanoscale was modified to improve its electrocatalytic performance.The main contents are:?1?The bulk CoFe LDHs nanoscale is composed of the metal layer and the interlayer anion,and the electrostatic interaction force exists between the metal layer and the interlayer anions.By using water plasma,the anion could be partially etched to remove the space between the nano-chip and the metal hydroxide layer.The layered block material has been successfully stripped by physical characterization,and the ultra-thin CoFe LDHs nanoscale has many vacancies and high specific surface area,which promotes the apparent increase of the oxidation performance.This study opens up a new method for the stripping of layered bulk materials,which is beneficial to the further development of non-precious electrocatalytic.?2?On the basis of the water plasma exfoliated block CoFe LDHs nanosheets,we develop solution plasma to modify the CoFe LDHs nanosheet.The surface activity of the new layer of the water plasma physical dissection is high,so that the chemical reactivity of the two sodium phosphate solution and the LDHs layer peel off from the original site is rapid.Chemical transformation of physical divestiture by solution plasma,the obtained amorphous CoFePi ultra-thin nanoscale has porous structure,multi vacancy,high specific surface area and amorphous structure,which promotes the oxygen release performance obviously.The study for the synthetic ultra-thin layer materials gives a new train of thought.