Deposition, processing and functionalization of vertical graphene nanowalls and their application on energy harvesting and storage

Graphene-based materials exhibit a series of desired properties, e.g., electrical conductivity, high surface-to-volume ratio and tuning of surface chemistry between others, which make them a Swiss army knife for use in energy-related applications. In the present talk, I present the latest experimental results from our research on vertical graphene nanowall (VGNW) use in the above applications. VGNWs are characterized by the perpendicular orientation of graphene nanosheets with respect to the growth substrate, which is advantageous for homogeneous functionalization with other nanoparticles via vapor deposition techniques. I provide insights on the deposition of VGNWs as a coating on planar and three-dimensional nanostructured substrates via plasma chemical vapor deposition [1]. Then, I present results on the processing of VGNWs by laser pulses as a means to tune their crystal structure and control the density of defects [2]. I will conclude the talk showing the results on the preparation of VGNW-based compounds for application in electrocatalytic hydrogen evolution [3-5] and supercapacitor applications [6], focusing on their role as a template for the efficient anchoring of nanostructures.

References

[1] S. Chaitoglou, R. Amade, E. Bertran Applied Surface Science 592 (2022) 153327

[2] S. Chaitoglou, A. Klini, N. Papakosta, Y. Ma, R. Amade, P. Loukakos, and E. Bertran-Serra J. Phys. Chem. Lett. 15 (2024) 3779–3784

[3] S. Chaitoglou, R. Ospina, Y. Ma, R. Amade, X. Vendrell, J. Rodriguez-Pereira, E. Bertran-Serra Journal of Alloys and Compounds 972 (2024) 172891

[4] S. Chaitoglou, R. Amade, R. Ospina, E. Bertran ACS Appl. Energy Mater. 6 (2023) 6120-6131

[5] S. Rodriguez-Miguel, Y. Ma, G. Farid, R. Amade, R. Ospina, J. Luis Andujar, E. Bertran-Serra, S. Chaitoglou Heliyon 10 (2024) e31230

[6] Y. Ma, S. Chaitoglou, G. Farid, R. Amade, R. Ospina, A. Munoz-Rosas, E. Bertran-Serra Chemical Engineering Journal 488 (2024) 151135