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author:

Li, Hongmei (Li, Hongmei.) [1] | Qian, Xing (Qian, Xing.) [2] (Scholars:钱兴) | Xu, Chong (Xu, Chong.) [3] | Huang, Shaowei (Huang, Shaowei.) [4] | Zhu, Changli (Zhu, Changli.) [5] | Jiang, Xiancai (Jiang, Xiancai.) [6] (Scholars:江献财) | Shao, Li (Shao, Li.) [7] | Hou, Linxi (Hou, Linxi.) [8] (Scholars:侯琳熙)

Indexed by:

EI Scopus SCIE

Abstract:

The development of highly active and stable earth abundant electrocatalysts to reduce or eliminate the reliance on noble metal based ones for hydrogen evolution reaction (HER) over a broad pH range remains a great challenge. Herein, hierarchical porous Co9S8/N-doped carbon@MoS, (Co9S8/NC@MoS2) polyhedrons have been synthesized by a facile hydrothermal approach using highly conductive Co/NC polyhedrons composed of cobalt nanoparticles embedded in N doped carbon matrices as both the structural support and cobalt source. The Co/NC polyhedrons were prepared by direct carbonization of Co based zeolitic imidazolate framework (ZIF-67) in Ar atmosphere. Benefiting from the prominent synergistic effect of N-doped carbon enhancing the conductivity of the hybrid, MoS2 and Co9S8 providing abundant catalytically active sites as well as the well-defined polyhedral structure promoting mechanical stability, the as-synthesized Co9S8/NC@MoS2 shows excellent HER activity and good stability over a broad pH range, with onset overpotentials of 4, 38, and 45 mV, Tafel slopes of 60.3, 68.8, and 126.1 mV dec(-1), and overpotentials of 67, 117, and 261 mV at 10 mA cm(-2) in 1.0 M KOH, 0.5 M H2SO4, and 1.0 M phosphate buffer solution (PBS), respectively. This work provides a general and promising approach for the design and synthesis of inexpensive and efficient pH-universal HER electrocatalysts.

Keyword:

Co9S8/N-doped carbon@MoS2 electrocatalysts hydrogen evolution reaction polyhedrons synergistic effect zeolitic imidazolate framework

Community:

  • [ 1 ] [Li, Hongmei]Fuzhou Univ, Coll Chem Engn, Xueyuan Rd 2, Fuzhou 350116, Fujian, Peoples R China
  • [ 2 ] [Qian, Xing]Fuzhou Univ, Coll Chem Engn, Xueyuan Rd 2, Fuzhou 350116, Fujian, Peoples R China
  • [ 3 ] [Xu, Chong]Fuzhou Univ, Coll Chem Engn, Xueyuan Rd 2, Fuzhou 350116, Fujian, Peoples R China
  • [ 4 ] [Huang, Shaowei]Fuzhou Univ, Coll Chem Engn, Xueyuan Rd 2, Fuzhou 350116, Fujian, Peoples R China
  • [ 5 ] [Zhu, Changli]Fuzhou Univ, Coll Chem Engn, Xueyuan Rd 2, Fuzhou 350116, Fujian, Peoples R China
  • [ 6 ] [Jiang, Xiancai]Fuzhou Univ, Coll Chem Engn, Xueyuan Rd 2, Fuzhou 350116, Fujian, Peoples R China
  • [ 7 ] [Shao, Li]Fuzhou Univ, Coll Chem Engn, Xueyuan Rd 2, Fuzhou 350116, Fujian, Peoples R China
  • [ 8 ] [Hou, Linxi]Fuzhou Univ, Coll Chem Engn, Xueyuan Rd 2, Fuzhou 350116, Fujian, Peoples R China

Reprint 's Address:

  • 侯琳熙

    [Hou, Linxi]Fuzhou Univ, Coll Chem Engn, Xueyuan Rd 2, Fuzhou 350116, Fujian, Peoples R China

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Source :

ACS APPLIED MATERIALS & INTERFACES

ISSN: 1944-8244

Year: 2017

Issue: 34

Volume: 9

Page: 28394-28405

8 . 0 9 7

JCR@2017

8 . 5 0 0

JCR@2023

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:306

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 188

SCOPUS Cited Count: 192

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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