Subnanoscale Dual-Site Pd–Pt Layers Make PdPtCu Nanocrystals CO-Tolerant Bipolar Effective Electrocatalysts for Alcohol Fuel Cell Devices

• DOI: 10.1021/acs.nanolett.3c00535
• Publication Date: 2023-04-10T15:05:27Z
• Authors: Xiaotong Yang; Qiang Yuan; Jingwei Li; Tian Sheng; Ke Xin Yao; Xun Wang
• Keywords: 7. Clean energy; 3. Good health

Finding a high-performance low-Pt bipolar electrocatalyst in actual direct alcohol fuel cells (DAFCs) remains challenging and desirable. Here, we developed crystalline PdPtCu@amorphous subnanometer Pd-Pt "dual site" layer core-shell structure for the oxygen reduction reaction (ORR) (methanol, ethylene glycol, glycerol, their mixtures) oxidation (AOR) an alkaline electrolyte (denoted D-PdPtCu). The prepared D-PdPtCu/C achieved 4-electron ORR pathway, full pathway AOR, high CO tolerance. mass activity (MA) of delivered 52.8- or 59.3-fold increase over commercial Pt/C Pd/C, respectively, no loss after 20000 cycles. also exhibited much higher AOR MA stability than Pd/C. Density functional theory revealed intrinsic nature surface enhancement. as effective yielded peak power densities DAFCs.