“…In the case of supported Pd 1 SAAs catalysts, the preparation methods vary, and the technical process has been relatively mature, although most of the methods for the preparation of bimetallic nano catalysts are still suitable and have been optimized and employed for their synthesis, such as incipient wetness impregnation (IWI) [ 18 , 167 , 168 ], deposition-precipitation (DP) [ 169 ], galvanic replacement (GR) [ 170 , 171 ], controlled surface reaction (CSR) [ 97 ], colloidal electroless reduction deposition (colloidal eless-RD) [ 172 , 173 ], the sol-gel method [ 174 ], physical vapor deposition (PVD) [ 146 , 147 , 175 ], electrochemical deposition (ECD) [ 176 ], photochemical reduction (PR) [ 177 ], and atomic layer deposition (ALD) [ 178 ]. For supported bimetallic DACs, the currently reported synthesis methods include photochemical reduction (PR) [ 164 ], deposition-precipitation (DP) [ 41 ], as well as thermal pyrolysis and even subsequent acid leading [ 179 , 180 ]. The illustrations for the specific synthetic methods, as well as characterization results of SAAs and DACs are shown in Figure 18 .…”