To work with more stable suspensions, we need to rely on the use of capping agents. In the case of MnPS 3 @PVP the increase of the catalytic activity is very mild in comparison to the bulk. This observation is the result of two opposite effects: On the one hand, the exfoliation of MnPS 3 gives rise to a higher number of layers in contact with hydronium ions, therefore increasing catalytic active site. On the other hand, the layers are covered by a tight layer of PVP, with an intense interaction with metallic centres, that prevents the H 3 O + ions from reaching the catalytic active sites and hence, decreases the catalytic efficiency dramatically. Therefore, this capping agent, despite providing a good exfoliation yield, and stable suspensions, is not suitable for this catalytic applications.