4.3 Preparation of 1T/2H mixed phase MoSe2directly grown on a carbon paper.
To synthesize MoSe2 directly onto a carbon paper (HCP020N; Shanghai Hesen Electric Co. Ltd), a mixed solution containing precursors and a 2×4 cm2 carbon paper was transferred to a 100 mL stainless-steel autoclave. The synthesis duration was 36 h, and the solution was rapidly cooled to 25 °C within 15 min. In-situ MoSe2 with varying synthesis times denoted MoSe2-I-Y (Y = 36), where I represent ‘in-situ’ and Y represent synthesis time. The loading amount onto the carbon paper was about ~5 mg. For the Pt loading on the MoSe2-I-36h-Pt sample was 0.15 wt% (~7.5ug/cm2).