Fig. 5: Behavior of interfacial water on different MoSe2.
From: Biaxial strain induced OH engineer for accelerating alkaline hydrogen evolution
Operando Raman spectra of interfacial water at (a) B-MoSe2 and (b) F-MoSe2. The 4HB-H2O, 2HB-H2O, and K+-H2O present three kinds of O-H stretching modes for H2O. c Stark tuning rates of the νO-H in Raman spectra for 4HB-H2O. d Comparison of the contents for 4HB-H2O and K+-H2O during alkaline HER. Scheme of interfacial water on (e) F-MoSe2 and (f) B-MoSe2. 4HB-H2O, 2HB-H2O, and K+-H2O indicate four hydrogen bonded water, two hydrogen bonded water, and hydrated K+ ion water, respectively. The blue (e) and red (f) shadings present sluggish and enhanced reaction between water and catalysts.
