Single‐atom catalysts supported on ordered porous materials: Synthetic strategies and applications

Abstract

Single-atom catalysts (SACs) are attracting extensive attention due to their incredibly catalytic activity and selectivity, high utilization of metal atoms, and obvious cost reduction. The unique ordered porous materials (OPMs) are promising carriers for stabilizing single atoms due to their large surface areas and uniformly tunable pore sizes. Meantime, the geometric and electronic structures of single-atom metals can be tuned by the interaction between the single-atoms (SAs) and OPMs to enhance the catalytic activity of SACs. The SACs based on OPMs, such as zeolites, metal-organic frameworks, and ordered mesoporous materials, have been developing fast recently. Herein, we review recent advancements on structural feature, synthetic strategy, characterization technique, and catalytic applications of OPMs-based SACs. The opportunities and challenges about SAs/OPMs are also provided to develop the novel catalysts with superior catalytic performances in the future.

Highly Efficient Transfer Hydrogenation of Biomass-Derived Furfural to Furfuryl Alcohol over Mesoporous Zr-Containing Hybrids with 5-Sulfosalicylic Acid as a Ligand

“…Moreover, 5-sulfosalicylic acid worked as the stabilizing agent, leading to the generation of very fine zirconia particles with the diameter of <2 nm in meso-Zr-SA15 ( Figure 2 f). Generally, heterogeneous catalysis occurred on the surface of metal particles, and the decrease in the size of metal particles resulted in a higher fraction of surficial atoms available, thus bringing about improvement on the catalytic performance [ 45 ]. The blank control experiment showed that 20.1% of furfural was converted with no furfuryl alcohol yield ( Table 2 , entry 6).…”

Emerging materials for electrochemical CO2reduction: progress and optimization strategies of carbon-based single-atom catalysts

“…Advanced atomic-level characterization techniques and theoretical methods, such as high-resolution high-angle annular darkfield scanning transmission electron microscopy (HAADF-STEM) images, X-ray absorption spectroscopy (XAS), Raman spectroscopy and DFT calculations have been gradually applied to the characterization and study of SACs. 150,151 In this section, we focus on two techniques, HAADF-STEM and XAS.…”

Recent progress on the long‐term stability of hydrogen evolution reaction electrocatalysts

“…5,6 Thus, many efforts have been devoted to developing highly performed water electrolysis and satisfying the demands for carbon-neutral initiatives. [7][8][9][10] Generally, excellent HER activity will occur on the dedicatedly designed electrocatalysts. Since the electrocatalysts go through extra voltage to overcome the energy barrier for HER, it is crucial to develop novel electrocatalysts with small overpotentials to reduce energy consumption and improve energy conversion efficiency.…”

“…Integrating HER and the intermittent electricity generated from those renewable energy resources represents a promising future for energy storage of renewable energies in the form of chemical energy 5,6 . Thus, many efforts have been devoted to developing highly performed water electrolysis and satisfying the demands for carbon‐neutral initiatives 7–10 …”