Precursor‐Based Synthesis of Porous Colloidal Particles towards Highly Efficient Catalysts

Abstract

In recent years, porous colloidal particles have found promising applications in catalytic fields, such as photocatalysis, electrocatalysis, industrial and automotive byproducts removal, as well as biomass upgrading. These applications are critical for alleviating the energy crisis and environmental pollution. Porous colloidal particles have remarkable specific areas and abundant reactive sites, which can significantly improve the mass/charge transport and reaction rate in catalysis. Precursor-based synthesis is among the most facile and widely-adopted methods to achieve monodisperse and homogeneous porous colloidal particles. In the current review, we briefly introduce the general catalytic applications of porous colloidal particles. The conventional precursor-based methods are reviewed to design state-of-the-art porous colloidal particles as highly efficient catalysts. The recent development of porous colloidal particles derived from metal-organic frameworks (MOFs), glycerates, carbonate precursors, and ion exchange methods are reviewed. In the end, the current concerns and future development of porous colloidal particles are outlined.

Relationship Between the Pore Structure of Mesoporous Silica Supports and the Activity of Nickel Nanocatalysts in the CO2 Reforming of Methane

“…Although the ordered mesoporous materials have many distinct advantages, they also have some disadvantages as support for Ni-based catalysts when employed in the CO 2 reforming of methane. The greatest drawback of these materials is that they have small pores, which are not able to provide sufficient space for the reactants with an adequate number of Ni active centres to drive the reaction [27,[36][37][38][39]. As a result, the catalytic capability of Ni catalysts supported on these materials can be negatively influenced.…”

“…A range of approaches has been developed to overcome this obstacle. Optimising the pore size and the development of hierarchical porous materials including different pore size systems have received special attention in recent years [9][10][11][12][13][14]37,38,[40][41][42][43][44][45][46][47][48][49][50][51][52][53]. This is because the hierarchical porous structure of the silica supports can not only increase the mass transport of the reactants to the Ni active sites, but also the mesoporous matrix hinders the thermal sintering of the Ni particles by the confinement effect [24,[54][55][56].…”

Tailoring Polymer Colloids Derived Porous Carbon Spheres Based on Specific Chemical Reactions

“…[12][13][14][15] For the development of carbon materials, heteroatomdoped carbons are renowned for their improved performance in many applications compared to pure carbon; this is due to the fact heteroatoms can modify the electron donor-acceptor characteristics of carbon materials. [16][17][18] Beyond the modification of classic phenolic resin colloids for N-doped carbons, the realization of new polymer colloids based on specific chemical reactions can not only introduce abundant N sites in polymer/carbon frameworks but also provide suitable control over N types. For example, conductive polymers such as polyaniline with amino-N and polypyrrole with pyrrolic-N synthesized based on oxidative polymerization were directly used as carbon precursors to obtain N-doped carbon electrocatalysts with different dominant N types.…”

A CeCoOx Core/Nb2O5@TiO2 Double‐Shell Nanocage Catalyst Demonstrates High Activity and Water Resistance for Catalytic Combustion of o‐Dichlorobenzene

“…In recent years, metal-organic frameworks (MOFs) have been investigated as new multipurpose materials and used in many fields due to their unique structure and function. [9] The core-shell structure is of special significance because of the nanoscale contact between the maximum metal-carrier interaction in the three-dimensional core-shell structure. In the present study, four catalysts of CeCoO x @Nb 2 O 5 @TiO 2 with different compositions and thickness of shell were synthesized.…”