质子交换膜燃料电池
金属间化合物
氧还原反应
介孔材料
燃料电池
材料科学
氧还原
碳纤维
还原(数学)
氧气
化学工程
膜
催化作用
化学
冶金
电化学
复合材料
工程类
电极
物理化学
有机化学
生物化学
几何学
数学
合金
复合数
作者
Ferng Chun Ke,Qian Cheng,Dong Ge Tong,Deyou Liu,Xu Xiang,Yubin Chen,Hui Yang,Hui Yang
标识
DOI:10.1016/j.jpowsour.2024.234357
摘要
The formation of small-sized (<5 nm) and high-loading (>50 wt%) Pt-based intermetallic compound structures commonly requires thermal treatment to conquer the atom-ordering barrier, which inevitably causes severe nanoparticle agglomeration and hence reduces oxygen reduction reaction activity. Herein, we provided a synthetic wrinkled carbon support by vapor deposition from methane (CH4), and then we utilized the carbon to synthesize sub-5 nm high-loading (50.6 wt%) Pt3Co1 intermetallic compound by mesoporous confinement effect. Structural characterizations reveal that the nanoparticles are mainly located in the pores of the mesoporous carbon with an average size of ca. 4.1 nm, corroborating the confinement effect of the mesoporous structure. As a consequence, the Pt3Co1 intermetallic compound catalyst exhibits superior oxygen reduction reaction activity with a mass activity (@0.9V) of 0.35 A/mgPt and satisfactory durability with a mass activity decline by 22% after 40k-cycles accelerated durability test. Membrane electrode assembly with the resultant catalyst delivers the desirable performance with the peak power density of ca. 1.0 W/cm2 while lowering the Pt loading to 0.1 mg/cm2, suggesting the practical application potential in low-Pt proton exchange membrane fuel cells.
科研通智能强力驱动
Strongly Powered by AbleSci AI