A carbon material doped with both porous FeO_(x) and N as an efficient catalyst for oxygen reduction reactions  

一种多孔FeO_(x),N共掺杂炭材料的制备及其氧还原反应性能

作　　者：GAO Jian WANG Xin-yao MENG Ling-xin YIN Zhen MA Na TAN Xiao-yao ZHANG Peng 高建;王欣瑶;孟令欣;尹振;马娜;谭小耀;张鹏(天津工业大学,化学工程与技术学院,天津市绿色化工过程重点实验室,分离膜与膜过程国家重点实验室,天津300387;海安南京大学高新技术研究院,江苏海安226600;天津科技大学化工与材料学院,天津300457;天津工业大学环境科学与工程学院,天津300387)

机构地区：[1]State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin Key Laboratory of Green Chemical Engineering Process Engineering,Department of Chemical Engineering,Tiangong University,Tianjin 300387,China [2]Haian Nanjing University High Tech Institute,Haian 226600,China [3]College of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin 300457,China [4]School of Environmental Science and Engineering,Tiangong University,Tianjin 300387,China

出　　处：《新型炭材料（中英文）》2024年第6期1202-1212,共11页New Carbon Materials

基　　金：国家自然科学基金项目(21872104,21776219);中国博士后科学基金(2018M631746);研究生创新项目(2022SKY142);江苏省基础研究计划(BK20201213).

摘　　要：To replace precious metal oxygen reduction reaction(ORR)electrocatalysts,many transition metals and N-doped car-bon composites have been proposed in the last decade resulting in their rapid development as promising non-precious metal catalysts.We used Ketjenblack carbon as the precursor and mixed it with a polymeric ionic liquid(PIL)of[Hvim]NO_(3) and Fe(NO_(3))_(3),which was thermally calcined at 900℃ to produce a porous FeO_(x),N co-doped carbon material denoted FeO_(x)-N/C.Because the PIL of[Hvim]NO_(3) strongly combines with and disperses Fe^(3+)ions,and NO_(3)−is thermally pyrolyzed to form the porous structure,the FeO_(x)-N/C catalyst has a high electrocatalytic activity for the ORR in both 0.1 mol L^(−1) KOH and 0.5 mol L^(−1) H_(2)SO_(4) electrolytes.It was used as the catalyst to assemble a zinc-air battery,which had a peak power density of 185 mW·cm^(−2).Its superior electrocatalytic activity,wide pH range,and easy preparation make FeO_(x)-N/C a promising electrocatalyst for fuel cells and metal-air batteries.为替代氧还原反应(ORR)的贵金属催化剂,近年来许多过渡金属和氮掺杂炭复合材料得到了快速的发展,并成为一种极具发展前景的非贵金属催化剂。本文以科琴黑(KB)为前驱体,通过与[Hvim]NO_(3)聚合离子液体(PIL)和Fe(NO_(3))3充分混合,然后在900℃下煅烧制得一种多孔FeO_(x),N共掺杂的炭材料(记为FeO_(x)-N/C)。由于[Hvim]NO_(3)能与Fe^(3+)离子紧密结合,且NO_(3)-会在高温下热解造孔,所以FeO_(x)-N/C催化剂在碱性(0.1 mol L^(-1)KOH)和酸性(0.5 mol L^(-1)H2SO4)电解质中表现出了较高的ORR电催化活性。随后,FeO_(x)-N/C作为阴极催化剂成功组装了一个锌空气电池(ZAB),其峰值功率密度高达185 m W·cm^(-2)。优异的电催化活性、较宽的pH值适用范围和简便的制备方法使得FeO_(x)-N/C成为未来燃料电池和金属-空气电池的理想电催化材料。

关 键 词：Oxygen reduction reaction Ionic liquid Porous carbon ELECTROCATALYSIS FeOx N co-doping 

分 类 号：TB33[一般工业技术—材料科学与工程]