All manipulations were performed under inert atmosphere using Schlenk
techniques. Pd(NO3)2·2H2O, 1-chloro-2-nitrobenzene,
and 1-chloro-3-nitrobenzene were used as received from Sigma-Aldrich.
Ketjen black EC 600JD (surface area = 1400 m2/g) was purchased
from Akzo Nobel. Black phosphorus (bP) was prepared according to the
literature procedure17 (link) and the liquid-phase
exfoliation of bP was performed according to a protocol set up in
our laboratories.18 (link)