Preparation of Nano-Ag₄Bi₂O₅ with Co-precipitation Method and Study of Its Application for Oxygen Reduction Reaction

摘要

Nano Ag4Bi2O5 rods were synthesized by co-precipitation method, in which mixed AgNO3- Bi(NO3)3solution was used as Ag-Bi source and KOH solution as precipitant. The structure, morphology andcomposition were researched via powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy(XPS) and scanning electron microscope (SEM), etc. Results show that the Ag4Bi2O5 were nanorodscrystal with 20-30 nm in width and 200-300 nm in length. Electrochemical measurements indicate thatthe Ag4Bi2O5 has excellent performance for oxygen reduction reaction (ORR) followed a four-electrontransfer pathway in alkaline electrolyte. Moreover, Ag4Bi2O5 was further tested in an assembled zinc- oxygen (Zn-O2) battery, which discharged up to 1400 h at 10 mA cm . So essentially, the inexpensiveand available Ag4Bi2O5 electrocatalyst has superior electro-catalytic activity and good durability.