Hollow structured PtNix alloy as cocatalyst of CdS for hydrogen generation under visible light irradiation
PtNi x hollow nanoparticles (HNPs) as a cocatalyst was synthesized by a galvanic replacement method at room temperature , and then was loaded on CdS. The hollow structure of PtNi x alloy was confirmed by TEM and STEM . Photocatalytic hydrogen production reaction was performed for PtNi x /CdS catalyst under 300 W Xe lamp (λ ≥ 420 nm). It is noteworthy that PtNi 0.5 /CdS shows the highest hydrogen evolution activity of 2.9 mmol/h with QE = 51.24% at 420 nm, which is higher than that of situ-photodeposited Pt onto CdS (0.57 mmol/h). The enhancement of hydrogen evolution performance of PtNi 0.5 /CdS could be attributed to the porous shell and hollow structure of PtNi 0.5 NPs, as well as the strong electronic coupling effect between Pt and Ni. Besides, the sheet structure of CdS in some degree promoted the hydrogen production rate. Therefore, the PtNi x HNPs could be a promising cocatalyst of CdS for solar driven hydrogen evolution.
危险品化学品经营许可证（带存储）