Highly Efficient CdS/WO 3 Photocatalysts: Z-Scheme Photocatalytic Mechanism for Their Enhanced Photocatalytic H 2 Evolution under Visible Light
Jilin University · Tsinghua University
Abstract
Natural photosynthesis is usually recognized as an efficient mechanism to achieve solar energy conversion. We construct a CdS/WO3 nanojunction achieving a Z-scheme for clean hydrogen fuel evolution by mimicking the natural photosynthesis. Although WO3 alone cannot be used for H2 evolution from water splitting, it can significantly increase the H2 evolution activity of CdS through a Z-scheme mechanism with lactate as electron donor. The CdS/WO3 photocatalyst has a high H2 evolution rate of 369 μmol g–1 h–1 at a CdS concentration of 20 wt %, which is 5 times as high as that of CdS with lactic acid as electron donor. For further improving the hydrogen production rate, we introduce the noble metal Pt to ameliorate…
Citation impact
- FWCI
- 16.47
- Percentile
- 100%
- References
- 45
Authors
5Topics & keywords
- Photocatalysis
- Water splitting
- Visible spectrum
- Hydrogen production
- Photochemistry
- Artificial photosynthesis
- Materials science
- Catalysis
- Affordable and clean energy