Integrating Ru-modulated CoP nanosheets binary co-catalyst with 2D g-C3N4 nanosheets for enhanced photocatalytic hydrogen evolution activity
| Autor: | Zhongkai Xie, Lijie Chen, Shichao Sun, Suci Meng, Pengfei An, Deli Jiang, Min Chen |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Kinetics chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis Ruthenium Biomaterials Colloid and Surface Chemistry Transition metal Chemical engineering chemistry Photocatalysis Quantum efficiency 0210 nano-technology Ternary operation Visible spectrum |
| Zdroj: | Journal of Colloid and Interface Science. 585:108-117 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2020.11.066 |
| Popis: | Developing high-efficient and low-cost photocatalysts is of great significance yet challenging for photocatalytic hydrogen evolution. Herein, we report a 2D/2D Ru-modulated CoP nanosheets (Ru-CoP-x, where x refers the Ru-to-Co molar ratio)/g-C3N4 nanosheets (GCN NSs) ternary hybrid as a photocatalyst for hydrogen evolution under visible light. The optimal photocatalyst 25% Ru-CoP-1:8/GCN NSs exhibits an excellent hydrogen evolution rate of 1172.5 µmol g−1 h−1 under visible light with a high apparent quantum efficiency (AQE) of 3.49% at 420 nm, which is close to Pt/g-C3N4 photocatalytic system and higher than most reported transition metal phosphides (TMP)/g-C3N4 photocatalytic system. Experimental results indicate that the higher photocatalytic hydrogen evolution performance can be mainly attributed to the binary Ru-CoP-x co-catalyst with efficient charge separation and promoted surface water reduction kinetics, and the 2D/2D self-assembly structure with strong interface Schottky effect and short charge transport distance. This study provides a new approach to develop cost-effective Pt-alternative co-catalysts for photocatalytic hydrogen evolution by incorporating a small amount of ruthenium into the transition metal phosphides. |
| Databáze: | OpenAIRE |
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