Electrochemical Preparation Of Microporous Copper And Its Thermal Catalytic Performance On Sodium Perchlorate

The structural characteristics of porous copper,such as high specific surface and high porosity,make porous copper become a research hotspot in energy storage and energy conversion,catalytic supports,aerospace and other fields.Na Cl O₄ is an important energetic oxide,and reducing its decomposition temperature can expand its application in the field of pyrotechnic materials.Based on hydrogen bubble template electrodeposition technology and Cu SO₄-H₂SO₄ as the base liquid,this paper studied the influence of additives（Cl^-,polyethylene glycol（PEG）,Cetyl trimethyl ammonium bromide（CTAB））on the copper deposition process,and combined porous copper with Na Cl O₄ to preliminarily explore its catalytic mechanism.The main results are as follows:（1）The additives were selected by electrochemical test method.The effects of Cl^-,PEG and CTAB on the electrodeposition behavior of porous copper were studied to optimize the composition of hydrogen bubble template plating solution system.The results showed that Cl^-could accelerate the reaction of copper precipitation.The synergistic effect of CTAB and PEG on copper evolution reaction and hydrogen evolution reaction was the most obvious.The copper separation voltage,the width of metal nucleation ring and the reaction resistance of Cl^-+PEG+CTAB were all the maximum values.（2）The effect of single-component and multi-component additives on the microstructure of porous copper layer was studied.It was found that in the Cl^-+PEG two-component additive,the porosity of porous copper decreased with the increase of PEG concentration.When PEG concentration exceeded 0.8g/L,the porosity of porous copper decreased to 92%,and 0.6g/LPEG was determined as the best concentration.On this basis,0.6mmol/LCTAB was added to form a three-component additive solution,and the obtained porous copper has a porosity of 94%,average surface pore size of 15～20μm,and 77%pore size of 5～15μm,which is the best type of porous copper.（3）The thermal catalytic performance and mechanism of microporous copper/Na Cl O₄ composites were analyzed by constructing microporous copper/Na Cl O₄composites with different types and loads.The results show that the microporous copper prepared by Cl^-+PEG+CTAB has the best catalytic performance,and can advance the thermal decomposition temperature of Na Cl O₄ from 517℃to 282℃.When the load of Na Cl O₄ is 30μL,the catalysis is divided into two steps:Na Cl O₄+4Cu→Na Cl+4Cu O;Na Cl O₄→Na Cl+2O₂↑...