1 research outputs found
Controllable Synthesis of Porous and Hollow Nanostructured Catalyst Particles and Their Soot Oxidation
The introduction of macroporous structures into three-way
catalysts
(TWCs) through polymer template-assisted spray drying has attracted
attention because of its enhanced gas diffusion and catalytic performance.
However, the surface charge effect of polymeric template components
has not been investigated to control the structure of the TWC particles
during synthesis. Thus, this study investigated the effect of template
surface charges on the self-assembly behavior of TWC nanoparticles
(NPs) during drying. The self-assembly of TWC NPs and polymer particles
with different charges produced a hollow structure, whereas using
the same charges generated a porous one. Consequently, the mechanism
of particle self-assembly during drying and final structure particle
formation is proposed in this study. Here, porous TWC particles demonstrated
a faster oxidation of soot particles than that of hollow-structured
particles. This occurred as a result of the larger contact area between
the catalyst surface and the solid reactant. Our findings propose
a fundamental self-assembly mechanism for the formation of different
TWC structures, thereby enhancing soot oxidation performance using
macroporous structures