In situ construction of chain-like PdAg/AgCl heterojunction electrocatalyst for ethylene glycol oxidation

作者：Zhan, Wei; Cheng, Zheng; Zhang, Rong-Hua^*; Yan, Luo-Yi; Tian, Gui-Xian; Lin, Dong-Hai; Xiao, Shu-Zhang; Zhou, Xin-Wen^*

来源：Journal of Electroanalytical Chemistry, 2023, 942: 117547.

DOI：10.1016/j.jelechem.2023.117547

• PdAg
• AgCl
• Heterojunction electrocatalyst
• Co -catalytic effect
• Ethylene glycol oxidation
• Fuel cell

In this paper, PdAg/AgCl heterojunction catalyst with chain structure has been synthesized using triblock copolymer P123 as protective agent and reducing agent. A small amount of AgCl is generated in situ, and finally the chain PdAg/AgCl heterojunction electrocatalyst is constructed. The chain structure mainly comes from the special chain structure of P123 itself. Electrochemical tests indicate that the PdAg/AgCl catalyst has good cat-alytic activity and stability for ethylene glycol, and its peak current density is 3.98 times that of commercial Pd/C catalysts. Compared with pure PdAg catalyst, the mass activity of glycol oxidation of the PdAg-AgCl cat-alyst has been increased by 1.52 times. After 500 cycles, the decay of catalytic activity decreased from 45.4% to 7.4%. The significant improvement of the catalytic activity and stability of the compound catalyst may be attributed to the co-catalytic effect of AgCl on the surface of PdAg and its special chain structure.