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A new strategy to access Co/N co-doped carbon nanotubes as oxygen reduction reaction catalysts

查看全文 作　　者：Bingshuai [1]Liu;Huang [1]Zhou;Huihui [1]Jin;Jiawei [1]Zhu;Zhe [1]Wang;Chenxi [1]Hu;Lvhan [1]Liang;Shichun [1]Mu;Daping [1,2]He 高影响力作者 机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;[2]Hubei Engineering Research Center of RF-Microwave Technology and Application,Wuhan University of Technology,Wuhan 430070,China高影响力机构 出　　处：《Chinese Chemical Letters》索引2021年第32卷第1期,共4页高影响力期刊 基　　金：financially sponsored by the National Natural Science Foundation of China(Nos.51701146,51672204);the Fundamental Research Funds for the Central Universities(No.WUT:2017IB015);Foundation of National Key Laboratory on Electromagnetic Environment Effects(No.614220504030617);the National Natural Science Foundation of China(No.51672204);the National Key Research and Development Program of China(No.2016YFA0202603)。 摘　　要：Carbon nanotubes(CNTs),as one-dimensional nanomaterials,show great potential in energy conversion and storage due to their efficient electrical conductivity and mass transfer.However,the security risks,time-consuming and high cost of the preparation process hinder its further application.Here,we develop that a negative pressure rather than a following gas environment can promote the generation of cobalt and nitrogen co-doped CNTs(Co/N-CNTs) by using cobalt zeolitic imidazolate framework(ZIF-67) as a precursor,in which the negative pressure plays a key role in adjusting the size of cobalt nanoparticles and stimulating the rearragement of carbon atoms for forming CNTs.Importantly,the obtained Co/N-CNTs,with high content of pyridinic nitrogen and abundant graphitized structure,exhibit superior catalytic activity for oxygen reduction reaction(ORR) with half-wave potential(E_(1/2)) of 0.85 V and durability in terms of the minimum current loss(2%) after the 30,000 s test.Our development provides a new pathway for large-scale and cost-effective preparation of metal-doped CNTs for various applications. 关 键 词：Negative pressure Cobalt zeolitic imidazolate framework Cobalt and nitrogen co-doped Carbon nanotubes Oxygen reduction reaction
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