电催化制双氧水碳基催化剂性能提升研究:孔径调控与氟掺杂对比  

Research on Performance Improvement of Carbon-based Catalysts for the Electrocatalytic Production of H_(2)O_(2):Comparison of Pore Size Regulation and F-doping

作　　者：庞雅慧 张启航 高阳 刘田菊 潘梦 杨仁春[1] PANG Yahui;ZHANG Qihang;GAO Yang;LIU Tianju;PAN Meng;YANG Renchun(School of Chemical and Environmental Engineering,Anhui Polytechnic University,Wuhu Anhui 241000,China)

机构地区：[1]安徽工程大学化学环境与工程学院,安徽芜湖241000

出　　处：《佳木斯大学学报（自然科学版）》2024年第11期159-163,共5页Journal of Jiamusi University：Natural Science Edition

基　　金：国家自然科学基金(51572004);安徽省自然科学基金(2008085QB91);安徽工程大学校级科研项目(Xjky2022106);安徽省大学生创新创业训练计划项目(202310363263)。

摘　　要：针对电催化氧还原制双氧水最常用的碳基催化材料,进行了孔径调控与氟掺杂两种性能提升方案的对比研究。在利用水热法制备多孔碳微球的过程中,通过引入适量的硅物种调控碳前驱体的组装行为,成功实现了对多孔碳微球孔径的调控;在合成出多孔碳微球的前提下,通过HF浸渍成功在碳骨架中引入了氟元素。电化学测试表明,扩大孔径和氟掺杂都能提高多孔碳材料2e^(-)ORR的活性和选择性,但是扩大孔径对选择性的影响更明显,氟掺杂对活性的提升更显著。此外,氟掺杂还能有效提高多孔碳材料的能量利用效率。因此,氟掺杂样品表现出了比孔径扩大的样品更高的双氧水产率。A comparative study is conducted between the effects of pore size regulation and F-doping on the performance of carbon-based catalytic materials for the electrocatalytic preparation of H_(2)O_(2).During the hydrothermal synthesis of porous carbon microsphere,the assembly behavior of the carbon precursor was changed by adding a certain amount of silicon species into the synthesis system.As a result,the pore size of the prepared porous carbon microsphere is enlarged.In addition,fluorine is successfully introduced into carbon framework through impregnating the prepared porous carbon microsphere in HF solution.The results of electrochemical tests indicate that the pore size regulation and F-doping both can cause the enhancement of the activity and selectivity of the porous carbon in the 2e^(-)oxygen reduction reaction.Further,the pore size regulation has a more significant influence on the selectivity while the F-doping has a better effect on improving the catalytic activity.Moreover,the F-doping endows the porous carbon with higher energy utilization efficiency.Thus,the F-doped sample exhibits a higher H_(2)O_(2) yield than the sample with enlarged pore size.

关 键 词：电催化 双氧水 多孔碳 孔径调控 氟掺杂 

分 类 号：O643.3[理学—物理化学]