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Co/N-doped carbon nanotube arrays grown on 2D MOFs-derived matrix for boosting the oxygen reduction reaction in alkaline and acidic media

引用

Chinese Chemical Letters 2021年第2期32卷 816-821页

作者： Shuao Wan Jiadong Wu Depeng Wang Huiling Liu Zhicheng Zhang Jianmin Ma Cheng Wang Institute for New Energy Materials and Low-carbon Technologies School of Materials Science and EngineeringTianjin Key Laboratory of Advanced Functional Porous Materials.Tianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of SciencesTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China School of Physics and Electronics Hunan UniversityChangsha 410082China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China

The development of high-performance and cost-effective electrocatalysts towards oxygen reduction reaction(ORR) is of significant importance,but still challenging for the practical applications in related energy *** process typically suffers from sluggish kinetics,the exploration of ORR electrocatalyst thus requires elaborate ***,an effective strategy is developed for growing Co/N-doped carbon nanotube arrays on 2D MOFs-derived matrix via the pyrolysis of Co/Zn metalorganic-framework(MOF) *** Co/Zn-MOF nanosheets serve as both the self-template for the 2D carbonized framework morphology and C/N source for the in-situ growth of 1D N-doped carbon *** constructed hie rarchical architecture effectively integrates the OD/1D Co nanoparticle/Ndoped carbon nanotube interface and 1D(nanotubes)/2D(nanosheets) junction into frameworks with highly exposed active surface,enhanced mass-transport kinetics and electrical *** a result,the designed composite exhibits superior ORR activity and durability in alkaline media as compared to commercial Pt/***,it shows promising ORR performance with a half-wave potential of 0.78 V versus reversible hydrogen electrode and negligible activity attenuation after 5000 potential cycles in acidic *** designed strategy can be extended to construct other MOFs-derived carbon matrixes with diverse hierarchical structures and provide an efficient avenue for searching highperformance electrocatalysts.

关键词： carbon nanotube arrays metal-organic-frameworks derived materials metal/nitrogen-doped carbon electrocatalysts Oxygen reduction reaction Alkaline and acidic media

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