Morphology and composition dependence of multicomponent Cu-based nanoreactor for tandem electrocatalysis CO2 reduction

In Situ Carbon-Encapsulated Copper-Doped Cerium Oxide Derived from MOFs for Boosting CO2-to-CH4 Electro-Conversion

“…55 With the potential becoming more negative, we can observe that the intensity of three peaks at 1590, 1411, and 1342 cm −1 derived from the asymmetric stretch, symmetric stretch, and C−O stretch of the *COO − intermediate gradually increases, which is generally regarded as an important intermediate for the reduction of CO 2 to CO or CH 4 . 18,56 The peaks at 2100 cm −1 can be successfully ascribed to the stretching vibration of the adsorbed *CO. 56 Furthermore, two more new bands appear at 1490 and 1380 cm −1 attributed to *CH 2 O and *OCH 3 species, which are the intermediates produced by the further proton-coupled electron transfer process of *CO. 18,57 Notably, these two intermediates are critical ones for electrochemical CO 2 reduction to CH 4 . Therefore, it can be inferred that the most likely reaction path of CO 2 reduction to CH 4 based on ATR−FTIR is as follows.…”

“…Copper (Cu) is still considered as the main metal for converting CO 2 to multi-electron reduction products at present. − Several factors have been proved to improve the selectivity of CH 4 , − such as the usage of single-atom catalysts to generate a single Cu site to prevent CO intermediate coupling or control the local CO 2 concentration on the surface of the Cu catalyst. , Although remarkable achievements have been made in the previously reported works, there are still certain limitations in terms of their performance, especially their unsatisfied selectivity and low operating current density to achieve industrial competitiveness of Cu-based CO 2 RR electrocatalysts.…”

Metal–support interactions for heterogeneous catalysis: mechanisms, characterization techniques and applications

“…The intensity, shape and parallel capabilities of the WL peaks can be very helpful for MSI studies. 70 In addition, operational XAS can provide electronic information throughout the reaction to investigate the additional changes that occur in the MSIs during the reaction. 71 For example, Eggart et al prepared two groups of 0.5-1% Ptloaded CeO 2 catalysts with unequal Pt dispersion and oxidation states.…”

Synergistic Effects of Lewis Acid–Base Pair Sites─Hf-MOFs with Functional Groups as Distinguished Catalysts for the Cycloaddition of Epoxides with CO2

“…Carbon dioxide (CO 2 ), which is the main greenhouse gas, has triggered many serious environmental problems due to its excessive emission into the atmosphere. − The capture and conversion of CO 2 into valuable chemicals have provided a meaningful strategy for reducing CO 2 emission and efficiently utilizing CO 2 as abundant and renewable C1 feedstock. − Among various CO 2 conversion reactions, the cycloaddition reactions of CO 2 and epoxides have been of intense interest due to their high atomic efficiency. − Meanwhile, the resultant product cyclic carbonates are a class of important heterocyclic compounds widely used in pharmaceutical and chemical industries. , In previous studies, different homogeneous and heterogeneous catalysts have been extensively explored to promote this coupling reaction, such as Schiff, metal complexes, metal oxides, and zeolites . However, the process usually suffers from high temperatures and pressures as well as rigorous separation and purification of the products, which greatly increases energy consumption and limits their practical applications .…”