3D interconnected hierarchically porous N-doped carbon with NH3 activation for efficient oxygen reduction reaction

被引：133
作者：
Wang, Yi [1 ]
Liu, Hanyu [1 ]
Wang, Kun [2 ]
Song, Shuqin [2 ]
Tsiakaras, Panagiotis [3 ,4 ]
机构：
[1] Sun Yat Sen Univ, Sch Chem Engn & Technol, Key Lab Low Carbon Chem & Energy Conservat Guangd, Zhuhai 519082, Peoples R China
[2] Sun Yat Sen Univ, Sch Mat Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
[3] Univ Thessaly, Dept Mech Engn, Lab Alternat Energy Convers Syst, Volos 38334, Volos, Greece
[4] Inst High Temp Electrochem, Lab Electrochem Devices Based Solid Oxide Proton, Ekaterinburg 620990, Russia
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2017年 / 210卷
基金：
中国国家自然科学基金;
关键词：
Oxygen reduction reaction; Nitrogen-doped; Hierarchically porous carbon; Electrochemical performance; METAL-FREE ELECTROCATALYSTS; MICROBIAL FUEL-CELLS; ORGANIC FRAMEWORK; NITROGEN; PERFORMANCE; GRAPHENE; CATALYSTS; OXIDE; IRON; CO;
D O I：
10.1016/j.apcatb.2017.03.054
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In the present work, a novel metal-free ORR electrocatalyst, with large specific surface area (2600 m(2) g(-1)), high content of N dopants (3.12 at.%) and 3D cross-linking hierarchically porous structure (abbreviated as LHNHPC) is readily prepared by using a modified classical carbon-aerogel method with NH3 as the activating agent. Compared with benchmark Pt/C catalyst, it is found that, LHNHPC exhibits similar electrocatalytic activity towards oxygen reduction reaction (ORR), superior durability and excellent methanol tolerance in basic media. The above electrochemical properties of LHNHPC are mainly attributed to the synergistic contribution of its unique hierarchical pore structure, the rich N doping and the large surface area. It can be anticipated that the proposed two-step process could be used for mass production of metal free electrocatalysts for a wide range of electrochemical devices including fuel cells and metal-air batteries. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：57 / 66
页数：10
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