A highly efficient noble metal free photocatalytic hydrogen evolution system containing MoP and CdS quantum dots. Issue 30 (13th July 2016)

• Record Type: Journal Article
• Authors: Yin, Shengming; Han, Jianyu; Zou, Yinjun; Zhou, Tianhua; Xu, Rong
• Is Part Of: Nanoscale. Volume 8:Issue 30(2016)
• Page Start: 14438
• Page End: 14447
• Publication Date: 2016-07-13
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c6nr00989a
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Small clusters of metallic MoP nanoparticles of 10–30 nm prepared by a TPR method and probe ultrasonication were used as cocatalysts in a CdS quantum dot based photocatalytic H2 evolution system for the first time. Such a noble metal free system exhibits high activity (QE 45% at 460 nm) and good stability. Abstract : We report the construction of a highly efficient noble metal free photocatalytic hydrogen (H2 ) evolution system using CdS quantum dots as the light absorber and metallic MoP as the cocatalyst. MoP can be prepared by a facile temperature programmed reduction method and small clusters of MoP nanoparticles sized 10–30 nm were obtained by probe ultrasonication. The effect of synthesis conditions on the electrocatalytic and photocatalytic H2 evolution activity of MoP was investigated. The highest H2 evolution rate of 1100 μmol h −1 can be achieved by the optimized system under visible light ( λ ≥ 420 nm), which is comparable to that when Pt was used as the cocatalyst. A high quantum efficiency of 45% is obtained at 460 nm irradiation.