ZIF衍生FeNi炭基双功能电催化剂制备及性能研究  

Preparation and properties of ZIF-derived FeNi doped carbon-based bifunctional electrocatalyst

作　　者：赵飒 赵得帅 史景利[1,2] 马昌 Zhao Sa;Zhao De-shuai;Shi Jing-li;Ma Chang(School of Materials Science and Engineering,Tiangong University,Tianjin 300387,China;Tianjin Municipal Key Lab of Advanced Fiber and Energy Storage Tecnology,Tianjin 300387,China)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387 [2]天津市先进纤维与储能技术重点实验室,天津300387

出　　处：《炭素技术》2023年第4期27-32,共6页Carbon Techniques

基　　金：天津市自然科学基金(No.16JCQNJC06300)。

摘　　要：为了制备高性能非贵金属炭基复合催化剂,在溶剂热合成沸石咪唑酯骨架-8(ZIF-8)过程中,向液相溶剂引入Ni2+获得Ni掺杂ZIF,进一步在炭化过程中通过有机铁盐气相掺杂Fe,获得ZIF衍生FeNi双掺炭基催化剂。研究了Ni盐添加量对于催化剂形态、活性物种构成、孔结构的影响,并进一步探讨了微结构对ORR、OER双功能催化性能的影响。结果表明,ZIF衍生FeNi双掺炭基催化剂(NiFe-C-2)表现出优异的催化性能:ORR半波电位达0.844 V,高于商用催化剂Pt/C的0.836,催化剂NiFe-C-2在32000 s的测试后电流保持率达89.40%,高于Pt/C的86.04%,具有更好的稳定性;10 mA·cm^(-2)电流密度下OER过电位为326 mV,小于商用RuO2的350 mV。此外,NiFe-C-2具有较小的ΔE(0.712 V),显示了其优异的双功能催化性能。In order to prepare high performance non-precious metal carbon-based composite catalyst,in the process of solvothermal synthesis of zeolite imidazole frame-8(ZIF-8),Ni^(2+)was introduced into the liquid solvent to obtain Ni-doped ZIF,and in the process of carbonization,Fe was doped by organic ferric salt vapor phase to obtain ZIF-derived FeNi double doped carbon-based catalyst.The effects of Ni salt addition on the morphology,active species composition,and pore structure of the catalyst were studied.The effect of microstructure on the difunctional catalytic performance of ORR and OER was further discussed.The results show that the ZIF-derived FeNi double-doped carbon-based catalyst(NiFe-C-2)possesses excellent catalytic performance,with higher ORR half-wave potential(0.844 V)and better stability(89.40%vs 86.04%)compared with Pt/C.The OER overpotential of NiFe-C-2 reaches 326 mV at 10 mA·cm^(-2),smaller than that of commercial RuO2(350 mV).Furthermore,NiFe-C-2 has a smallΔE value of 0.712 V,showing its excellent difunctional catalytic performance.

关 键 词：非贵金属炭基催化剂 氧还原反应 析氧反应 沸石咪唑酯骨架 

分 类 号：TQ150.1[化学工程—电化学工业] O646[理学—物理化学]