氮掺杂再生活性炭的制备及电催化氧还原反应性能研究  

Preparation and Electrocatalytic Oxygen Reduction Performance of Nitrogen Doped Regenerated Activated Carbon

作　　者：叶嘉鸿 李德念 阳济章 赵悦 袁浩然[2,3,4] 陈勇 YE Jiahong;LI Denian;YANG Jizhang;ZHAO Yue;YUAN Haoran;CHEN Yong(School of Biomass Engineering Research,South China Agricultral University,Guangzhou 510642,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China;Guangdong Provincial Key Laboratory of New Energy and Renewable Energy Research,Development and Application,Guangzhou 510640,China)

机构地区：[1]华南农业大学生物质工程研究院,广州510642 [2]中国科学院广州能源研究所,广州510640 [3]南方海洋科学与工程广东省实验室(广州),广州511458 [4]广东省新能源和可再生能源研究开发与应用重点实验室,广州510640

出　　处：《材料导报》2023年第10期37-43,共7页Materials Reports

基　　金：国家重点研发计划(2019YFC1906605);广州市科技计划项目(202201010687);广东省基础与应用基础研究基金(2022A1515011653)。

摘　　要：为解决危废活性炭传统回收方式带来的资源浪费和环境污染等问题,本工作以抗生素脱色废活性炭为原料、氨气为氮源,采用高温热解再生法将氮元素通过sp 2杂化键合进入到活性炭骨架中,制备了氮掺杂再生废活性炭氧还原反应(ORR)催化剂,分析了氮掺杂再生活性炭的物相组成、微观形貌、电化学性能。结果表明,当温度为1000℃、退火时间为1 h时,所制备的N-RWAC-1000-1氧还原电催化性能最佳。N-RWAC-1000-1具有丰富的微孔和介孔结构,比表面积可达908 m^(2)/g,在碱性介质中的起始电位为0.92 V(vs.RHE),半波电位为0.82 V(vs.RHE),均接近商业20%(质量分数)的铂碳催化剂。此外,氮掺杂再生炭拥有优于商业化铂碳的循环稳定性和甲醇耐受性,有望成为新的氧还原催化剂以期为抗生素脱色废活性炭的高值化利用提供了新的方向。In order to solve the problems of resource waste and environmental pollution caused by the traditional recycling of hazardous waste activated carbon,this work prepared a nitrogen-doped regenerated waste activated carbon oxygen reduction reaction(ORR)catalyst by using anti-biotic decolorization waste activated carbon as raw material and ammonia gas as nitrogen source,and the nitrogen element was bonded into the activated carbon skeleton through sp 2 hybridization by high temperature pyrolysis regeneration.The physical composition,microscopic morphology and electrochemical properties of the nitrogen-doped regenerated activated carbon were analyzed.The results showed that the best perfor-mance of the prepared N-RWAC-1000-1 oxygen reduction electrocatalyst was achieved when the temperature was 1000℃and the annealing time was 1 h.The N-RWAC-1000-1 had abundant microporous and mesoporous structures with a specific surface area up to 908 m^(2)/g.The starting potential in alkaline medium was 0.92 V(vs.RHE),the half-wave potential was 0.82 V(vs.vs.RHE),both close to commercial 20wt%platinum carbon catalysts.In addition,the nitrogen-doped regenerated carbon possesses better cycling stability and methanol tolerance than commercial platinum carbon and is expected to be a new oxygen reduction catalyst.It also provides a new direction for the high-value utilization of antibiotic decolorization waste activated carbon.

关 键 词：废活性炭 高温热再生 氮掺杂碳 氧还原反应 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]