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Synthesis of an ordered porous carbon with the dual nitrogen-doped interfaces and its ORR catalysis performance

查看全文 作　　者：Hongwei [1,2]Zhao;Yanqiu [1,2]Zhang;Li [1,2]Lixiang;Xin [1,2]Geng;Haiming [1,2]Yang;Weimin [1,2]Zhou;Chengguo [1,2]Sun;Baigang [1,2]An 高影响力作者 机构地区：[1]School of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,China;[2]Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province,Anshan 114051,China高影响力机构 出　　处：《Chinese Chemical Letters》索引2021年第32卷第1期,共6页高影响力期刊 基　　金：The financial supports from National Natural Science Foundation of China projects(NSFC,Nos.51672117,51672118,51872131,51972156 and 21701077);the Distinguished Professor Project of Education Department of Liaoning and Key Scientific Research Plan of Liaoning Province(No.2018304017)are acknowledged。 摘　　要：Both nitrogen-doping feature and pore structure are critical factors for developing nitrogen-doped carbons based catalysts with a high performance toward oxygen reduction reaction(ORR).Herein,a simple one-step CVD of acetylene and acetonitrile vapor method using silanized SBA-15 as a template has been developed to synthesize an ordered porous carbon(OPC) with dual nitrogen-doped interfaces.The optimized sample as prepared with the CVD of 4 h at 750℃ contains two types of ordered mesopores that one type is the ordered cylindrical pores inheriting from the pores of SBA-15 and has a pore width of4.0~5.0 nm,the other type is the ordered quasi-hexagonal pores with a width of 3.0~4.0 nm produced by etching the pore walls of SBA-15.These two types of pores whose pore walls are built by the nitrogen doped carbon layers resulted by the CVD and thus it actually makes the dual nitrogen-doped interfaced OPC(DN-OPC).Meanwhile,DN-OPC contains a few of micropores and a large SSA of 1430 m~2/g.This dualordered pores and dual nitrogen-doped interfaces cannot only facilitate mass transport but also utilize the active sites of DN-OPC for ORR.Therefore,as metal-free ORR catalyst,DN-OPC exhibits a good activity close to commercial Pt/C catalyst,and an excellent durability and methanol tolerance. 关 键 词：Silanized SBA-15 NITROGEN-DOPED Dual-ordered pores CVD of acetonitrile Oxygen reduction reaction
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