A rich thermotropic phase map is documented for a class of versatile glycolipids that now includes dodecagonal quasicrystal (DDQC) and Frank-Kasper A15, and σ mesophases of tunable periodicity that are connected through rapid thermotropic phase t...
Co0−Coδ+ Interface Double‐Site‐Mediated C−C Coupling for the Photothermal Conversion of CO2 into Light Olefins
Von Wiley-VCH zur Verfügung gestellt
Co0−Coδ+ interfacial double sites exhibit excellent selectivity toward light olefins during the hydrogenation of CO2 enhanced by light irradiation when compared with pure metallic Co. Owing to the interfacial effect, Co0−Coδ+ exhibits a lower hydrogenation ability than metallic Co, tuning a pathway with a manageable activation barrier for C−C coupling.
Solar-driven CO2 hydrogenation into multi-carbon products is a highly desirable, but challenging reaction. The bottleneck of this reaction lies in the C−C coupling of C1 intermediates. Herein, we construct the C−C coupling centre for C1 intermediates via the in situ formation of Co0−Coδ+ interface double sites on MgAl2O4 (Co−CoO x /MAO). Our experimental and theoretical prediction results confirmed the effective adsorption and activation of CO2 by the Co0 site to produce C1 intermediates, while the introduction of the electron-deficient state of Coδ+ can effectively reduce the energy barrier of the key CHCH* intermediates. Consequently, Co−CoO x /MAO exhibited a high C2–4 hydrocarbons production rate of 1303 μmol g−1 h−1; the total organic carbon selectivity of C2–4 hydrocarbons is 62.5 % under light irradiation with a high ratio (≈11) of olefin to paraffin. This study provides a new approach toward the design of photocatalysts used for CO2 conversion into C2+ products.Zum Volltext
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