  Recent studies reported on the synthesis and characterization of several bulk
crystals of layered metal triselenophosphites MPSe$_3$ (M = transition metals).
In these works characterization was performed via a combination of different
bulk- and surface-sensitive experimental methods accompanied by DFT
calculations. However, the critical examination of the available experimental
and theoretical data demonstrates that these results do not support the
conclusions on the electrochemical sensing and energy applications of studied
triselenophosphites. These conclusions are made without any relation to the age
of discussed data and possible recent progress in experimental and theoretical
approaches.
