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author:

Huang, Baobing (Huang, Baobing.) [1] (Scholars:黄宝冰) | Hu, Xiang (Hu, Xiang.) [2] | Liu, Yuchuan (Liu, Yuchuan.) [3] | Qi, Wei (Qi, Wei.) [4] | Xie, Zailai (Xie, Zailai.) [5] (Scholars:谢在来)

Indexed by:

EI Scopus SCIE

Abstract:

Effective 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.

Keyword:

3D framework CNT-Graphene hybrids Effective integration Electrocatalysts Guanine-sulfate

Community:

  • [ 1 ] [Huang, Baobing]Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Fujian, Peoples R China
  • [ 2 ] [Hu, Xiang]Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Fujian, Peoples R China
  • [ 3 ] [Liu, Yuchuan]Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Fujian, Peoples R China
  • [ 4 ] [Xie, Zailai]Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Fujian, Peoples R China
  • [ 5 ] [Qi, Wei]Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China

Reprint 's Address:

  • 谢在来

    [Xie, Zailai]Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Fujian, Peoples R China;;[Qi, Wei]Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China

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Source :

JOURNAL OF POWER SOURCES

ISSN: 0378-7753

Year: 2019

Volume: 413

Page: 408-417

8 . 2 4 7

JCR@2019

8 . 1 0 0

JCR@2023

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:236

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 81

SCOPUS Cited Count: 84

ESI Highly Cited Papers on the List: 4 Unfold All

  • 2020-5
  • 2020-3
  • 2020-1
  • 2019-9

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 7

Online/Total:181/10019457
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