Covalently Bonded MoS2-Borocarbonitride Nanocomposites Generated by Using Surface Functionalities on the Nanosheets and Their Remarkable HER Activity was written by Pramoda, K.;Ayyub, Mohd Monis;Singh, Navin Kumar;Chhetri, Manjeet;Gupta, Uttam;Soni, Amit;Rao, C. N. R.. And the article was included in Journal of Physical Chemistry C in 2018.Synthetic Route of C18H11BrO The following contents are mentioned in the article:
In the light of the recent discovery that C-rich borocarbonitrides show electrocatalytic activity for generating H from H2O, the authors synthesized nanocomposites by covalently crosslinking BC7N with MoS2 sheets to explore whether the HER activity can be significantly enhanced. To cross-link BC7N and MoS2 sheets, the authors have exploited the presence of different functional groups on the surfaces of BN (NH2) and graphene (COOH) domains of the borocarbonitride, as quant. determined by FLOSS. The authors have thus obtained two nanocomposites differing in the location of the crosslinking and these are designated as BN/BCN-MoS2 and G/BCN-MoS2, depending on which domains in the borocarbonitride participate in crosslinking. These nanocomposites were characterized by various spectroscopic methods including fluorescence labeling and their electrochem. and photochem. HER activity studied. The composite where the graphene domains are cross-linked to MoS2 nanosheets, G/BCN-MoS2 (1:2), exhibits outstanding electrochem. HER activity with an onset potential of -30 mV (vs. RHE) and a c.d. of 10 mA cm-2 at an overpotential of -35 mV. This performance is closely comparable to that of Pt. The composite where the BN domains were cross-linked show somewhat lower activity. The phys. mixture of BCN and MoS2, however, does not display any notable HER activity. The BCN-MoS2 composites also exhibit good photochem. activity. It is noteworthy that 2H-MoS2, which does not exhibit significant catalytic activity, can be rendered highly active by crosslinking with BCN. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Synthetic Route of C18H11BrO).
2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Synthetic Route of C18H11BrO
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary