介孔材料
传质
多孔性
耐久性
材料科学
宏
化学工程
体积热力学
多孔介质
纳米技术
催化作用
化学
复合材料
色谱法
热力学
计算机科学
工程类
有机化学
物理
程序设计语言
作者
Min Jie Wang,Tao Zhao,Wei Luo,Zhan Mao,Siguo Chen,Wei Ding,Yonghui Deng,Wei Li,Jing Li,Zidong Wei
出处
期刊:Aiche Journal
[Wiley]
日期:2018-03-12
卷期号:64 (7): 2881-2889
被引量:23
摘要
For oxygen reduction reaction (ORR), constructing porous catalysts are highly important for mass transfer inside. However, the various porous structures usually possess significantly different water buffer efficiency, that is, the antiflooding capability, for which one is still difficult to give a quantitative evaluation. In this work, we designed a special “rattle‐drum” like working electrode, by which an exactly quantitative assessment on the mass transfer efficiencies can be conducted. Particularly, ordered macro‐mesoporous Pt/C shows quantified mass transfer and antiflooding efficiency to be four times high as that of the commercial one. This observation should be attributed to their different pore characteristics, as the dual‐porosity Pt/C has 3.4 times the pore volume of the commercial one, together with regular pore arrangement. Simultaneously, it also demonstrated excellent durability, indicating that the macro‐mesoporous Pt/C indeed owns high stability in both antiflooding and durability. © 2018 American Institute of Chemical Engineers AIChE J , 64: 2881–2889, 2018
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