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

来源：

CARBON | 2017年 / 122卷

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

页码：746 / 755

页数：10

共 56 条

[1] Highly active and durable Pd nanoparticles-porous graphitic carbon nitride composite for electrocatalytic oxygen reduction reaction [J].