The pores within the ZnO-CuO mesocrystal provide direct diffusion channels for gas molecules to diffuse and contribute to fast adsorption/desorption at the interface, which is ideal for reducing the response/recovery time in gas sensing.
First, it is quite possible, and even likely, that different trans-national diffusion channels operate simultaneously.
Much like the FRPs themselves, one can argue diffusion channels (and mechanisms) to be interdependent.
This can be ascribed to the destruction of the ordered diffusion channels after ultrasonic.
It consists of five Annular Diffusion Channels of different lengths equipped with a reference filter; they operate in parallel.
The porous graphene-wrapped SnO2, having direct diffusion channels for Li+, outperforms the SnO2 with less-porous graphene.
Apparently, the porous carbon with ultrathin structure can provide low-resistant pathways and short ion diffusion channels for energy storage.
The micro-interstices formed in these closed-packed microspheres of homogeneous sizes, which consist of equivalent micropores (~15 % of the sphere size) [29], serve as the diffusion channels.
Notably, no concentrated pore distribution is observed for NiO BHPA (inset of Fig. 4b), indicating complete destruction of ordered diffusion channels.
The excellent electrocatalytic activity can be ascribed to large specific surface area (SSA), ordered diffusion channels, and accelerated electron transfer rate derived from the unique hollow porous features.
The decrease of SSA and destruction of ordered diffusion channels are adverse for kinetics, which may result in poor electrocatalytic activity.
