01771naa a2200241 a 450000100080000000500110000800800410001902400290006010000180008924501120010726000090021930000140022852010800024265300220132265300300134465300340137470000150140870000200142370000160144370000150145970000170147477300380149121216692024-12-11       2020    bl uuuu     u00u1 u    #d7 a10.1557/jmr.2020.162DOI1 aPUPPIN, L. G.  aElectrochemical reduction of CO2 to formic acid on Bi2O2CO3/carbon fiber electrodes.h[electronic resource]  c2020  a272 - 280  aElectrochemical reduction of CO2 to formic acid is a good strategy to address both environmental and energy issues. However, some drawbacks including low activity, selectivity, and stability of electrocatalysts must be overcome. We propose a method for tailoring Bi 2 O 2CO 3 -coated carbon fiber electrodes with higher selectivity and stability for electrochemical CO 2 reduction to formic acid. We evaluated the effect of Bi 2 O 2CO 3 and Nafion contents on the electrocatalysts performance for CO 2 reduction reaction (CO 2RR). All electrodes produced only HCOO− in the liquid phase with a maximum faradaic efficiency (FE) of 69%. The electrocatalysts were stable under 24 h of continuous CO 2 RR operation. The FE increased with the increasing electrolyte concentration and cation radius size, which indicates that the anion stabilization in solution is critical for adequate formate generation. The CO 2 RR mechanism was proposed with basis on the literature. The structural carbonate of Bi2 O 2 CO3 acts as an intermediate species in the formate production from CO 2.  aEnergy production  aMetallic electrocatalysts  aOrganic pollutant degradation1 aKHALID, M.1 aSILVA, G. T. T.1 aRIBEIRO, C.1 aVARELA, H.1 aLOPES, O. F.  tMaterials Research Societygn. 35