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

中文翻译：

---

有序大介孔介电催化剂的定量传质和出色的防溢性能

对于氧还原反应（ORR），构造多孔催化剂对于内部的质量转移非常重要。然而，各种多孔结构通常具有显着不同的水缓冲效率，即抗溢流能力，对此仍然难以进行定量评估。在这项工作中，我们设计了一个类似工作电极的特殊“鼓鼓”，通过它可以对传质效率进行准确的定量评估。特别是，有序的宏观中孔Pt / C的定量传质和防溢效率是商业化Pt / C的四倍。该观察结果应归因于它们不同的孔隙特征，因为双重孔隙Pt / C的孔隙体积是商品孔隙的3.4倍，并且孔隙排列规则。同时，它还表现出出色的耐久性，表明中微孔Pt / C确实在防潮性和耐久性方面都具有很高的稳定性。©2018美国化学工程师学会AIChE J，64：2881–2889，2018