fig2

Figure 2. (A) CO₂-TPD for Pd NCs and Te-Pd NCs; CO-stripping measurements for (B) Te-Pd NCs/C and (C) Pd NCs/C (0.1 M KHCO₃ solution, the scanning rate is 20 mV·s^-1, the first cycle has a CO absorbed adlayer and the second cycle does not. Dose CO for 30 min before measuring); (D) Schematic diagram for urea electrosynthesis from CO₂RR and NO₂^-RR at Te-Pd NCs. Reprinted with permission from ref^[22]. Copyright 2020 American Chemical Society; (E) In situ ATR-FTIR spectra for ZnO-V under CO₂, NaNO₂, and both; (F) Schema of urea synthesis on ZnO-V. Reprinted with permission from ref^[23]. Copyright 2021 The Authors. Cell Reports Physical Science published by Elsevier. TPD: Temperature-programmed desorption; NCs: nanocrystals; CO₂RR: reduction reaction of CO₂; ATR-FTIR: attenuated total reflection Flourier transformed infrared.