NiGraf: A new nickel-based molecularly doped metal for enhanced water electrolysis

06 September 2023, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


Graphene oxide was 3D entrapped in nickel nanoparticles and the resulting nanostructured material applied as electrocatalyst in both hydrogen and oxygen evolution reactions at room temperature. This establishes a completely new class of catalytic materials, dubbed herein “NiGraf”, which is highly promising towards enhanced alkaline water electrolysis.


molecularly doped metal
graphene oxide
alkaline water eletrolysis

Supplementary materials

Electronic Supplementary Information (ESI)
The ESI file contains four figures and two tables. Figures S1-S3 and Table S1 provide further data supporting the determination of the crystal phase composition of the NiGraf materials. Table S2 presents the main structural parameters determined by fitting of the PDF profiles of the NG1, NG2 and NG3 materials with a structural model composed by a linear superposition between the crystal structures COD 9012317 (jamborite) and COD 9012236 (graphene oxide). Figure S4 displays the the lab X-ray powder diffraction (XPD) profiles allowing crystallite average size determination by the common peak at 2θ = 45°


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