韓敏教授課題組和包建春教授課題組合作在APPLIED CATALYSIS B-ENVIRONMENTAL發(fā)表研究論文
Synergistically enhanced oxygen reduction electrocatalysis by atomically dispersed and nanoscaled Co species in three-dimensional mesoporous Co, N-codoped carbon nanosheets network
Zhao, SL (Zhao, Shulin)[ 1,2 ] ; Yang, J (Yang, Jing)[ 1,2 ] ; Han, M (Han, Min)[ 1,2 ]*（韓敏）; Wang, XM (Wang, Xiaoming)[ 3 ] ; Lin, Y (Lin, Yue)[ 4 ]*; Yang, R (Yang, Rui)[ 5 ] ; Xu, DD (Xu, Dongdong)[ 1,2 ] ; Shi, NE (Shi, Naien)[ 5 ] ; Wang, Q (Wang, Qi)[ 6 ] ; Yang, MJ (Yang, Minjun)[ 1,2 ] ; Dai, ZH (Dai, Zhihui)[ 1,2 ] ; Bao, JC (Bao, Jianchun)[ 1,2 ]*（包建春）
[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China
[ 2 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Key Lab Biofunct Mat, Nanjing 210023, Jiangsu, Peoples R China
[ 3 ] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan
[ 4 ] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
[ 5 ] Nanjing Univ Posts & Telecommun, Inst Adv Mat, Key Lab Organ Elect & Informat Displays, Nanjing 210023, Jiangsu, Peoples R China
[ 6 ] Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
APPLIED CATALYSIS B-ENVIRONMENTAL，201901,260
Metal-nitrogen-codoped carbon (M-N-C) nanostructures are promising electrocatalysts for oxygen reduction reaction (ORR). Despite the great progress that has been achieved, synthesizing three-dimensional porous nanoarchitectures derived from Co-N-C nanosheets or related nanohybrids with high content ( > 5 wt%) of exposed single-atom sites remains a challenge. Herein, novel three-dimensional mesoporous Co-N-C nanosheets network enwrapping small amount of Co nanoparticles nanohybrids are fabricated by molten-salt template-assisted pyrolysis of Co-folic acid precursors and chemical etching. In the obtained nanohybrids, the content of single-atom-like Co (SA-Co%) is 7.4 wt% < SA-Co% < 19.4 wt%. Due to the unique mesoporous nanosheets network structure and efficient synergy of atomic and nanoscaled Co species, such nanohybrids manifest enhanced ORR activity with a half-wave potential of 0.85 V, outperforming pure Co-N-C, Pt/C and most of other reported catalysts. Moreover, their stability exceeds that of Pt/C. This work will lead to the optimization of M-N-C nanostructures and accelerate their applications in fuel cells.
文章鏈接：
https://www.sciencedirect.com/science/article/pii/S0926337319309543?via%3Dihub
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