**Author details**

*Nanofibers - Synthesis, Properties and Applications*

**124**

**4. Conclusion**

**Figure 6.**

*the electrode.*

is lower than that for pure cellulose.

role in water reduction.

**Acknowledgements**

financial support.

**Conflict of interest**

The authors declare no conflict of interest.

AFM results indicate no significant changes in the morphology of modified cellulose nanofibrils. The best experimental conditions for chemical functionalization is 1:3 molar ratio at room temperature. As reported in other studies on chemically modified cellulose, the degradation temperature for modified cellulose nanofibrils

*Steady-state polarization curves for electrodes containing CNFs pure and modified at a scanning rate of 5 mV s−1, K2SO4 0.5 Mol/L saturated with Ar and CO2 at 25 °C. currents normalized by the geometric area of* 

From the electrochemical perspective, introducing dicyanovinyl groups into the polymeric chain of cellulose nanofibrils has led to significantly higher electrocatalytic activity in CO2 reduction as compared to that for pure cellulose nanofibrils, shifting the onset potential to more positive values as compared to that observed for the reaction with Ar. Moreover, the CO2 molecule exhibits affinity for the cellulose polymer and the polymeric layer may play an inhibitory

The authors thanks the Program of Post Graduation in Science of Materials - PPGCM of the Universidade Federal de São Carlos - UFSCar, campus Sorocaba for Robson V. Pereira1 , Thais E. Gallina1 , Marcelo A. Pereira-da-Silva2 , Kênia S. Freitas1 and Aparecido J. de Menezes3 \*

1 Grupo de Eletroquímica e Polímeros Naturais (GEPN), Universidade Federal do Rio de Janeiro - UFRJ, Campus Macaé, Macaé - Rio de Janeiro, Brasil

2 Instituto de Física de São Carlos, IFSC, Universidade de São Paulo - USP, São Carlos, São Paulo, Brasil

3 Grupo de Polímeros de Fontes Renováveis - GPFR, Universidade Federal de São Carlos - UFSCar, Campus Sorocaba, Sorocaba, São Paulo, Brasil

\*Address all correspondence to: jrmenezes@ufscar.br

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