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Quantified mass transfer and superior antiflooding performance of ordered macro‐mesoporous electrocatalysts
Author(s) -
Wang Min Jie,
Zhao Tao,
Luo Wei,
Mao Zhan Xin,
Chen Siguo,
Ding Wei,
Deng Yonghui,
Li Wei,
Li Jing,
Wei Zidong
Publication year - 2018
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16140
Subject(s) - mesoporous material , mass transfer , porosity , durability , materials science , macro , chemical engineering , volume (thermodynamics) , porous medium , nanotechnology , catalysis , chemistry , composite material , chromatography , thermodynamics , computer science , engineering , organic chemistry , physics , programming language
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