Improved durability of Pt catalyst supported on N-doped mesoporous graphitized carbon for oxygen reduction reaction in polymer electrolyte membrane fuel cells

被引:38
作者
Jung, Won Suk [1 ]
Popov, Branko N. [1 ]
机构
[1] Univ South Carolina, Dept Chem Engn, Ctr Electrochem Engn, Columbia, SC 29208 USA
关键词
ENHANCED-ELECTROCATALYTIC ACTIVITY; NANOTUBE ELECTRODES; METHANOL OXIDATION; NITROGEN; NANOPARTICLES; PLATINUM; CO; NANOSTRUCTURES; PERFORMANCE; SURFACES;
D O I
10.1016/j.carbon.2017.07.028
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
N-doped mesoporous graphitized carbon (NMGC) was prepared by the pyrolysis of chelating complex adsorbed on carbon. The NMGC shows a higher degree of graphitization than carbon black as evidenced by the change of specific surface area, interlayer spacing, and ID/IG value. The stable quaternary nitrogen type is dominantly observed in the NMGC incorporated with Fe (NMGC-Fe). Pt particles are well-distributed on the NMGC-Fe in the range of 2-3 nm. The Pt/NMGC-Fe catalyst shows remarkably improved durability after 30,000 potential cycles between 0.6 and 1.0 V. The maximum power density and the potential loss of Pt/NMGC-Fe catalyst decrease by 26% and 83 mV at 600 mA cm(-2). The commercial Pt/C catalyst shows the very poor durability of 52% loss of maximum power density and zero potential at 600 mA cm(-2). The electrochemical surface area of Pt/NMGC-Fe catalyst is more stable than the commercial Pt/C catalyst. The interaction between Pt and NMGC-Fe contributes strongly to the observed high durability under practical operating conditions. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:746 / 755
页数:10
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