fig5

Figure 5. (A) STEM image of s-mesoPdCu nanocube^[66]. Formic acid selectivities (B) and stability test at -0.4 V (C) for s-mesoPdCu, s-mesoPd, p-mesoPd and Pd NPs^[66]. Reprinted with permission. Copyright 2018, Chinese Chemical Society^[66]. (D) Schematic diagram of formic acid production over Pd nanocrystals enclosed by different crystal facets^[67]. (E) Free energy of electrochemical reduction of CO₂ to formic acid on Pd(111) (red), Pd(100) (violet), Pd(110) (blue), Pd₁₉ clusters (green) and Pd(211) (yellow)^[67]. (F) HCOO* and *CO generate free energy on Pd nanocrystals with different crystal facets^[67]. Reprinted with permission. Copyright 2016, American Chemical Society^[67].