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Title: Two-Dimensional N,S-Codoped Carbon/Co 9 S 8 Catalysts Derived from Co(OH) 2 Nanosheets for Oxygen Reduction Reaction

Abstract

Investigation of highly active and cost-efficient electrocatalysts for oxygen reduction reaction is of great importance in a wide range of clean energy devices, including fuel cells and metal-air batteries. Herein, the simultaneous formation of Co9S8 and N,S-codoped carbon was achieved in a dual templates system. First, Co(OH)2 nanosheets and tetraethyl orthosilicate were utilized to direct the formation of two-dimensional carbon precursors, which were then dispersed into thiourea solution. After subsequent pyrolysis and templates removal, N/S-codoped porous carbon sheets confined Co9S8 catalysts (Co9S8/NSC) were obtained. Owing to the morphological and compositional advantages as well as the synergistic effects, the resultant Co9S8/NSC catalysts with modified doping level and pyrolysis degree exhibit superior ORR catalytic activity and long-term stability compared with the state-of-the-art Pt/C catalyst in alkaline media. Remarkably, the as-prepared carbon composites also reveal exceptional tolerance of methanol, indicating their potential applications in fuel cells.

Authors:
 [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [2];  [3];  [3]; ORCiD logo [3]; ORCiD logo [1]
  1. School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, United States
  2. School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164, United States; Key Laboratory of Pesticide and Chemical Biology, Ministry of Education of the PR China and College of Chemistry, Central China Normal University, Wuhan 430079, China
  3. Environmental Molecular Science Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1411896
Report Number(s):
PNNL-SA-126249
Journal ID: ISSN 1944-8244; 48877; KP1704020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Applied Materials and Interfaces; Journal Volume: 9; Journal Issue: 42
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Nonprecious metal catalysts; two-dimensional composites; nitrogen/sulfar-codoped carbon; Co9S8; oxygen reduction reaction; Environmental Molecular Sciences Laboratory

Citation Formats

Fu, Shaofang, Zhu, Chengzhou, Song, Junhua, Feng, Shuo, Du, Dan, Engelhard, Mark H., Xiao, Dongdong, Li, Dongsheng, and Lin, Yuehe. Two-Dimensional N,S-Codoped Carbon/Co 9 S 8 Catalysts Derived from Co(OH) 2 Nanosheets for Oxygen Reduction Reaction. United States: N. p., 2017. Web. doi:10.1021/acsami.7b10227.
Fu, Shaofang, Zhu, Chengzhou, Song, Junhua, Feng, Shuo, Du, Dan, Engelhard, Mark H., Xiao, Dongdong, Li, Dongsheng, & Lin, Yuehe. Two-Dimensional N,S-Codoped Carbon/Co 9 S 8 Catalysts Derived from Co(OH) 2 Nanosheets for Oxygen Reduction Reaction. United States. doi:10.1021/acsami.7b10227.
Fu, Shaofang, Zhu, Chengzhou, Song, Junhua, Feng, Shuo, Du, Dan, Engelhard, Mark H., Xiao, Dongdong, Li, Dongsheng, and Lin, Yuehe. Thu . "Two-Dimensional N,S-Codoped Carbon/Co 9 S 8 Catalysts Derived from Co(OH) 2 Nanosheets for Oxygen Reduction Reaction". United States. doi:10.1021/acsami.7b10227.
@article{osti_1411896,
title = {Two-Dimensional N,S-Codoped Carbon/Co 9 S 8 Catalysts Derived from Co(OH) 2 Nanosheets for Oxygen Reduction Reaction},
author = {Fu, Shaofang and Zhu, Chengzhou and Song, Junhua and Feng, Shuo and Du, Dan and Engelhard, Mark H. and Xiao, Dongdong and Li, Dongsheng and Lin, Yuehe},
abstractNote = {Investigation of highly active and cost-efficient electrocatalysts for oxygen reduction reaction is of great importance in a wide range of clean energy devices, including fuel cells and metal-air batteries. Herein, the simultaneous formation of Co9S8 and N,S-codoped carbon was achieved in a dual templates system. First, Co(OH)2 nanosheets and tetraethyl orthosilicate were utilized to direct the formation of two-dimensional carbon precursors, which were then dispersed into thiourea solution. After subsequent pyrolysis and templates removal, N/S-codoped porous carbon sheets confined Co9S8 catalysts (Co9S8/NSC) were obtained. Owing to the morphological and compositional advantages as well as the synergistic effects, the resultant Co9S8/NSC catalysts with modified doping level and pyrolysis degree exhibit superior ORR catalytic activity and long-term stability compared with the state-of-the-art Pt/C catalyst in alkaline media. Remarkably, the as-prepared carbon composites also reveal exceptional tolerance of methanol, indicating their potential applications in fuel cells.},
doi = {10.1021/acsami.7b10227},
journal = {ACS Applied Materials and Interfaces},
number = 42,
volume = 9,
place = {United States},
year = {Thu Oct 12 00:00:00 EDT 2017},
month = {Thu Oct 12 00:00:00 EDT 2017}
}