FIGURE 2 Electrochemical performances of non-noble based and Cu based-catalysts for CO2RR. (A) FE and (B) current density of all different catalysts. (C) CO reduction pathways for CO and formate formation. Reproduced with the permission.[57] Copyright 2019, American Chemical Society. (D) Schematics of the preparation of the Bi(PC-6c), Bi(DC-60s), and Bi(DC-120s). (E) HCOO FE at different potentials. Reproduced with the permission.[58]Copyright 2017, Elsevier. (F) Total current densites and (G) partial C2H4 current densities of n-CuNS, CuNS, and CuNP. (H) FEs of n-CuNS for C2H4 and H2 production. Reproduced with the permission.[63] Copyright 2020, American Chemical Society