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Novel hierarchical SnO2 microsphere catalyst coated on gas diffusion electrode for enhancing energy efficiency of CO2 reduction to formate fuel

Author

Listed:
  • Fu, Yishu
  • Li, Yanan
  • Zhang, Xia
  • Liu, Yuyu
  • Qiao, Jinli
  • Zhang, Jiujun
  • Wilkinson, David P.

Abstract

The conversion of carbon dioxide to value-added fuel using electrical energy generated intermittently from renewable energy sources is very promising in terms of energy usage reconciliation. The process converts greenhouse carbon dioxide gas to produce diverse attractive chemicals and fuels like methanol, formate, and other hydrocarbons. In this paper, the electroreduction of CO2 to formate in aqueous solution is performed by using novel hierarchical tin oxide microsphere (HMS-SnO2) particles deposited over gas diffusion layer electrode (HMS-SnO2/GDE). The experiment is carried out in a divided H-type two-compartment cell with a Nafion® membrane as the diaphragm separating the cathodic and anodic compartments. The HMS-SnO2 catalysts are synthesized by a facile hydrothermal self-assembled process using different ratios of ethanol to distilled water in the synthetic solution. Due to the outstanding catalytic activity and selectivity toward CO2 electroreduction, SnO2-86/GDE exhibits a high Faradaic efficiency of 62% toward formate formation at −1.7V vs. SHE (Standard Hydrogen Electrode). The electrode durability is also observed with a stable current density over 12h of continuous electrolysis operation. The superior performance is credited to the morphology- and size-controlled hierarchical structure, which may provide more active sites to accelerate the slow kinetics of CO2 reduction, leading to the improved energy efficiency. During electrolysis process, KHCO3 electrolyte is found to have some contribution to formate formation on the micro-structured tin oxide catalysts coated GDE electrode.

Suggested Citation

  • Fu, Yishu & Li, Yanan & Zhang, Xia & Liu, Yuyu & Qiao, Jinli & Zhang, Jiujun & Wilkinson, David P., 2016. "Novel hierarchical SnO2 microsphere catalyst coated on gas diffusion electrode for enhancing energy efficiency of CO2 reduction to formate fuel," Applied Energy, Elsevier, vol. 175(C), pages 536-544.
    • Handle: RePEc:eee:appene:v:175:y:2016:i:c:p:536-544
    DOI: 10.1016/j.apenergy.2016.03.115
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    References listed on IDEAS

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    1. Del Castillo, A. & Alvarez-Guerra, M. & Solla-Gullón, J. & Sáez, A. & Montiel, V. & Irabien, A., 2015. "Electrocatalytic reduction of CO2 to formate using particulate Sn electrodes: Effect of metal loading and particle size," Applied Energy, Elsevier, vol. 157(C), pages 165-173.
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    Cited by:

    1. Dong, Bao-Xia & Zhao, Juan & Wang, Long-Zheng & Teng, Yun-Lei & Liu, Wen-Long & Wang, Lu, 2017. "Mechanochemical synthesis of COx-free hydrogen and methane fuel mixtures at room temperature from light metal hydrides and carbon dioxide," Applied Energy, Elsevier, vol. 204(C), pages 741-748.
    2. Tufa, Ramato Ashu & Chanda, Debabrata & Ma, Ming & Aili, David & Demissie, Taye Beyene & Vaes, Jan & Li, Qingfeng & Liu, Shanhu & Pant, Deepak, 2020. "Towards highly efficient electrochemical CO2 reduction: Cell designs, membranes and electrocatalysts," Applied Energy, Elsevier, vol. 277(C).
    3. Chai, Rukuan & Liu, Yuetian & Wang, Jingru & Liu, Qianjun & Rui, Zhenhua, 2022. "CO2 utilization and sequestration in Reservoir: Effects and mechanisms of CO2 electrochemical reduction," Applied Energy, Elsevier, vol. 323(C).
    4. Wang, Fuhuan & Xie, Heping & Liu, Tao & Wu, Yifan & Chen, Bin, 2020. "Highly dispersed CuFe-nitrogen active sites electrode for synergistic electrochemical CO2 reduction at low overpotential," Applied Energy, Elsevier, vol. 269(C).
    5. An, Xiaowei & Li, Shasha & Hao, Xiaoqiong & Xie, Zhengkun & Du, Xiao & Wang, Zhongde & Hao, Xiaogang & Abudula, Abuliti & Guan, Guoqing, 2021. "Common strategies for improving the performances of tin and bismuth-based catalysts in the electrocatalytic reduction of CO2 to formic acid/formate," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).
    6. Shahgaldi, Samaneh & Alaefour, Ibrahim & Li, Xianguo, 2018. "Impact of manufacturing processes on proton exchange membrane fuel cell performance," Applied Energy, Elsevier, vol. 225(C), pages 1022-1032.

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