High-performance electrocatalytic reduction of CO2 to CO by ultrathin PdCu alloy nanosheets

Ru Regulated Electronic Structure of PdxCuy Nanosheets for Efficient Hydrogen Evolution Reaction in Wide pH Range

“…For the Ru/Pd 2 Cu-70, these diffraction peaks shift to lower 2𝜃, which can be attributed to the replacement of Cu by larger sized Ru atoms, resulting in an increase of lattice spacing. [41][42][43] The morphology of the Pd 2 Cu and Ru/Pd 2 Cu-70 alloy nanosheets were then characterized by SEM and TEM measurements, as illustrated in Figures 1c,g (Supporting Information), the samples all demonstrated an ultrathin nanosheet structure, and the introduction of Ru does not alter the original nanosheet structure. HR-TEM images (Figure 1h) reveal that the nanosheets display clear and well-defined lattice fringe, with a spacing of 0.225 nm (Figure 1i), corresponding to the (111) facet of Ru/Pd 2 Cu-70 alloy nanosheets, which is larger than that of Pd 2 Cu alloy nanosheets (0.224 nm) (Figure S1b, Supporting Information), indicating that a small amount of Cu atoms has been replaced by large-sized Ru atoms, which is consistent with the results of XRD measurements (Figure 1b).…”