Improved nitrogen reduction electroactivity by unique MoS2-SnS2 heterogeneous nanoplates supported on poly(zwitterionic liquids) functionalized polypyrrole/graphene oxide

Unique MoS2-SnS2 heterogeneous nanoplates have successfully in-situ grown on poly(3-(1-vinylimidazolium-3-yl)propane-1-sulfonate) functionalized polypyrrole/ graphene oxide (PVIPS/PPy/GO). PVIPS can attract heptamolybdate ion (Mo7O246?) and Sn4+ as the precursors by ion-exchange, resulting in simultaneous growth of 1T’-MoS2 berndtite-2T-type hexagonal SnS2 interfacial induced effect PVIPS. The obtained MoS2-SnS2/ PVIPS/PPy/GO serve electrocatalysts, exhibiting good NRR performance synergistic effect. semi-conducting would limit surface electron accessibility for suppressing HER process 1T’-MoS2, while metallic might efficiently improve electroactivity creation Mo-Sn-Sn trimer catalytic sites. Otherwise, irreversible crystal phase transition has taken place during process. Partial electrochemically reacted with N2, irreversibly converted into Mo2N SnxNz due to formation Mo?N Sn?N bonding, meanwhile, partial been evolved SnS reduction power source electrochemical system. It put forward a new design idea optimizing preparation method electrocatalytic activity metal dichalcogenides.