图2.(a) The crystal structure of MOF-525 and the chemical structure of metal node; (b) The PXRD patterns of MOF-525 and Fe_MOF-525 film; (c) Current density versus time for Fe_MOF-525 under different conditions; (d) Faradaic efficiency over about 4 h of electrolysis.
图3.(a) Molecular structure of the MOF catalyst; (b) The organic building units of the 3D MOF Al2(OH)2TCPP-Co. (c) The MOF is integrated with a conductive substrate to build electrochemistry system for reduction of CO2; (d) The product selectivity at the potential range of −0.5–0.9 V vs. RHE; (e) The long-term stability test of the MOF catalyst and the corresponding faradaic efficiency measurement.
图4.The cyclic voltammetry curves for (1) CR-MOF, (2) bare CP, and (3) Cu metal electrode in CO2-saturated (a) and N2-saturated (b) 0.5 M KHCO3 electrolyte; (c) At different potentials, the production distributions of Cu metal and CR-MOF electrodes.
图5.(a) Illustration of the MWCNT support improved the interparticle conductivity and mass transport for pyrolyzed ZIFs towards electrochemical reduction of CO2. FEs for CO (b) and H2 (c) over different catalysts at different potentials, respectively. LSV curves of (d) ZIF-CNT-FA-p and (e) ZIF-Fe-CNT-FA-p in CO2-saturated 0.1 M NaHCO3 (dashed lines) and N2-saturated 0.1 M NaH2PO4/Na2HPO4 (solid lines).
图6. (a) Illustration of the synthesis of Ni SAs/N-C. (b) TEM, (c) HAADF-STEM images of Ni SAs/N-C, and (d) the corresponding SAED pattern of an individual rhomb-dodecahedron. (e, f) Magnified HAADF-STEM images of Ni SAs/N-C; The Ni single atoms are marked with red circles. (g) EDS mapping of Ni SAs/N-C. (h) The FEs of CO produced on Ni SAs/N-C and Ni NPs/N-C at different applied potentials; (i) the proposed mechanism for CO2 reduction over Ni SAs/N-C.