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In this study, tin oxide (SnO2) was synthesized via a sol–gel method and evaluated for CO2 conversion to formate ions. Synthesized SnO2(S) featured a tetrahedral rutile structure with a uniform morphology, confirmed by selected area electron diffraction (SAED) as a single-crystal material. Physiochemical characteristics of the catalysts were studied using various characterization techniques. The surface area of the catalyst was found to be 20.1 m2/g. Electrochemical studies demonstrated high electrocatalytic activity, with increased current density in CO2-saturated solutions compared to N₂-saturated ones. Chronoamperometry confirmed excellent stability of the catalyst, while 1H NMR analysis validated formate ion production, achieving a Faradaic efficiency of 81.2% within one-hour at -1.7 V (vs Ag/AgCl).

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Synthesis of Polyhedral SnO2 for the CO2 Electrochemical Reduction to Formic Acid

  • 会议论文

  • 发表日期：

    2025年

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  • M. Imthiaz Ahmed,
  • Shaik Sharfoon,
  • Sayyad Abdulla,
  • Kartikeya Shukla

摘要

In this study, tin oxide (SnO2) was synthesized via a sol–gel method and evaluated for CO2 conversion to formate ions. Synthesized SnO2(S) featured a tetrahedral rutile structure with a uniform morphology, confirmed by selected area electron diffraction (SAED) as a single-crystal material. Physiochemical characteristics of the catalysts were studied using various characterization techniques. The surface area of the catalyst was found to be 20.1 m2/g. Electrochemical studies demonstrated high electrocatalytic activity, with increased current density in CO2-saturated solutions compared to N₂-saturated ones. Chronoamperometry confirmed excellent stability of the catalyst, while 1H NMR analysis validated formate ion production, achieving a Faradaic efficiency of 81.2% within one-hour at -1.7 V (vs Ag/AgCl).