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Controlled Synthesis of Silver Micro/Nano Leaves for Oxygen Reduction and CO2 Reduction

Authors
  • Wang, Meng
  • Liu, Rongji
  • Zhang, Shuangshuang
  • Li, Bin
  • Zhang, Ke
  • Zhang, Guangjin
Publication Date
Aug 01, 2018
Source
Institutional Repository of Institute of Process Engineering, CAS (IPE-IR)
Keywords
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Unknown
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Abstract

In this study, three different Ag micro/nano leaves were successfully synthesized through a galvanic displacement reaction by adjusting the concentration of Ag+. The catalytic activities of the prepared Ag micro/nano leaves toward ORR showed strong dependence on their morphology. An optimal concentration of Ag+ can result in a well-defined Ag micro/nano leaves with both crystallization and surface area, which showed the best activity towards ORR in alkaline media. In addition, the prepared Ag micro/nano leaves also showed high activity towards CO2 reduction, which required a potential of -0.8 V versus RHE to selectively convert CO2 to CO with the faradaic efficiency at about 20%. Compared with the Ag plate at the same overpotential, the FE has increased by 5-fold.

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