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Biomolecule-derived N/S co-doped CNT-graphene hybrids exhibiting excellent electrochemical activities
Huang, Baobing; Hu, Xiang; Liu, Yuchuan; Qi, Wei; Xie, Zailai
2019-02-15
Source PublicationJOURNAL OF POWER SOURCES
ISSN0378-7753
Volume413Pages:408-417
AbstractEffective integration of CNTs and heteroatom-doped graphene can produce a new functional carbons that combines the extraordinary properties of heteroatom-doped graphene (e.g., catalytic activity, and huge exposed field) with those of CNTs (e.g., mechanical stability, and high electronic conductivity). Herein, we report a straightforward method to manufacture a metal-free, hierarchically porous and N/S co-doped CNT-graphene 3D framework via one-step pyrolysis of the guanine-sulfate and OCNTs. The usage of guanine-sulfate as carbon precursor can yield very regular (2D nanosheet) and in situ nitrogen-doped carbons. By combining with OCNTs, the as-obtained graphene is found to strongly couple with the surface of CNTs, achieving the uniform distribution of both components. Such 3D hybrid shows high activity toward a set of important electrochemical reactions and high-performance in Zn-air batteries. Systematic electrochemical studies indicate the indispensability of both the optimal nitrogen configuration and well-developed porosity for excellent ORR/OER/HER performance. The amount of pyridinic-N and graphitic-N, rather than the total nitrogen content, has a more positive effect on ORR activity, particularly for the onset potential; while the favorable pore size distributions might guarantee a much well-developed diffusion-limited current region and considerable diffusion-limited current value. These results undoubtedly could provide meaningful guidance to develop highly efficient electrocatalysts.
KeywordCNT-Graphene hybrids Effective integration 3D framework Guanine-sulfate Electrocatalysts
Indexed BySCI
Language英语
WOS IDWOS:000457512700047
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:32[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81367
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Huang, Baobing,Hu, Xiang,Liu, Yuchuan,et al. Biomolecule-derived N/S co-doped CNT-graphene hybrids exhibiting excellent electrochemical activities[J]. JOURNAL OF POWER SOURCES,2019,413:408-417.
APA Huang, Baobing,Hu, Xiang,Liu, Yuchuan,Qi, Wei,&Xie, Zailai.(2019).Biomolecule-derived N/S co-doped CNT-graphene hybrids exhibiting excellent electrochemical activities.JOURNAL OF POWER SOURCES,413,408-417.
MLA Huang, Baobing,et al."Biomolecule-derived N/S co-doped CNT-graphene hybrids exhibiting excellent electrochemical activities".JOURNAL OF POWER SOURCES 413(2019):408-417.
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