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Erschienen in:
03.02.2022 | Highlight
Core–shell nanostructure for supra-photothermal CO2 catalysis
Erschienen in: Rare Metals | Ausgabe 5/2022
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Excerpt
Powered by the solar light as energy source, gas-phase photothermal carbon dioxide (CO2) catalysis has recently sprung up as a promising route to convert CO2 molecules into value-added chemicals, feedstocks, and fuels, profiting from the great potential to be well integrated into the existing petrochemical production system. In a recent work published in Nature energy, Cai et al. [1] reported a core–shell structure of nickel nanocrystal encapsulated into nanoporous silica (Ni@p-SiO2) for greenhouse-like photothermal catalytic CO2 hydrogenation (Fig. 1a, b), which may shed light on the rapidly growing photothermal catalysis field for a renewable solar fuels industry.
Fig. 1
a Schematic illustration of Earth’s greenhouse-like effect; b mechanism description of nanoscale greenhouse effect in Ni@p-SiO2; c illustration of synthesis procedure for Ni@p-SiO2; d transmission electron microscopy (TEM) images, high resolution transmission electron microscopy (HRTEM) image, and selected area electron diffraction (SAED) pattern from left to right; e elemental energy-dispersive X-ray spectroscopy (EDS) mapping of Ni@p-SiO2-30; f photothermal effect profiles via measuring macroscopic surface temperatures of different samples under simulated 2.8 W·cm−2 sun-light illumination (left) and estimated local temperature (Tlocal) under 2.4 and 2.8 W·cm−2 illumination (right); photothermal catalytic activity of Ni@p-SiO2-30 in terms of g CO2 conversion rate and h CO selectivity; long-term stability tests in terms of i CO selectivity and j CO2 conversion rate
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