无模板法中空碳球电化学产过氧化氢  

Electrochemical production of hydrogen peroxide from hollowcarbon spheres by template-free method

作　　者：詹珉 占敬敬 ZHAN Min;ZHAN Jing-jing(School of Ocean Science and Technology,Dalian University of Technology,Panjin 124221,China)

机构地区：[1]大连理工大学海洋科学与技术学院,辽宁盘锦124221

出　　处：《应用化工》2023年第11期2981-2985,共5页Applied Chemical Industry

基　　金：国家自然科学基金面上项目(21876022)。

摘　　要：采用气溶胶法无模板制备了中空碳球,并进行改性,构建了电化学产H_(2)O_(2)体系,探究了改性机理、最佳改性条件、最佳反应条件、循环性能。研究表明,同时使用H2碳化和KOH活化的中空碳球的产H_(2)O_(2)性能最好,H2使得大量C=C转化为催化活性更高的C—C。中空碳球改性的最佳煅烧温度为800℃,最佳煅烧时间为2 h。改性后的中空碳球产H_(2)O_(2)具有较广的pH(3~11)和电压(-0.8~-1.4 V)适应范围。在电压-1.2 V、催化剂量2.67 mg/cm^(2)、空气流量1.5 L/min、pH 7条件下,产生的H_(2)O_(2)浓度最高,1 h内达到了173 mg/L,循环5次后,性能没有明显下降。The modified hollow carbon spheres were prepared by aerosol method without template,and the electrochemical H_(2)O_(2) production system was constructed.The modification mechanism,the best modification conditions,the best reaction conditions and the cycle performance were investigated.Studies have shown that hollow carbon spheres activated by both H 2 carbonization and KOH have the best H_(2)O_(2) production performance,and H 2 converts a large amount of C C into C—C with higher catalytic activity.The optimum calcination temperature of hollow carbon sphere modification is 800℃,and the optimum calcination time is 2 h.The modified hollow carbon spheres have a wide range of pH(3~11)and potential(-0.8~-1.4 V).Under the conditions of potential-1.2 V,catalyst amount 2.67 mg/cm 2,air flow rate 1.5 L/min and pH 7,the concentration of H_(2)O_(2) produced reached the maximum value,reaching 173 mg/L in 1 h.And the performance did not decrease significantly after 5 cycles.

关 键 词：中空碳球 过氧化氢 电催化 无模板 

分 类 号：TQ150.8[化学工程—电化学工业] O646.5[理学—物理化学]