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Citation: TANG Meixiang, YI Qingfeng. Synthesis and Electrocatalysis Activity of Silver-Tin Bimetallic Catalysts for Oxygen Reduction Reaction[J]. Chinese Journal of Applied Chemistry, ;2013, 30(10): 1176-1181. doi: 10.3724/SP.J.1095.2013.20566 shu

Synthesis and Electrocatalysis Activity of Silver-Tin Bimetallic Catalysts for Oxygen Reduction Reaction

School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

Received Date: 5 December 2012
Revised Date: 28 February 2013

Carbon-loaded Ag or Ag-Sn bimetallic nanoparticles were prepared by the hydrothermal process,in which Ag⁺ or Ag⁺ + Sn²⁺ dissolved in ethanol were reduced to Ag or binary Ag-Sn nanoparticles by ethanol as the reduction agent. The morphological features of the catalysts show a typical nanoporous structure. Cyclic voltammetry and steady state polarization measurements were used to investigate the electroactivity of the samples for oxygen reduction reaction (ORR). The results show that both Ag/C and Ag-Sn/C exhibits a high electrocatalysis activity,with the onset potential of ca.0.05 V(vs.Ag/AgCl) and a high current density for the ORR. Levich analysis shows that the binary Ag-Sn/C possesses a much greater electron number for ORR than Ag/C. Among the prepared samples,the Ag₉₇Sn₃/C catalyst displays the highest current density for oxygen reduction reaction. In addition,the Ag/C and Ag-Sn/C catalysts exhibit strong tolerance towards methanol.
- binary silver-tin bimetallic,
- silver electrode,
- oxygen reduction,
- hydrothermal method
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