| Autor: |
Zhangqian Liang, Yanjun Xue, Xinyu Wang, Xiaoli Zhang, Jian Tian, Hongzhi Cui |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Nano Materials Science, Vol 5, Iss 2, Pp 202-209 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2589-9651 |
| DOI: |
10.1016/j.nanoms.2022.03.001 |
| Popis: |
2D-layered graphitic carbon nitride (g-C3N4) is regarded as a great prospect as a photocatalyst for H2 generation. However, g-C3N4's photocatalytic hydrogen evolution (HER) activity is significantly restricted by the recombination of photocarriers. We find that cobalt sulfide (CoS2) as a cocatalyst can promote g-C3N4 nanosheets (NSs) to realize very efficient photocatalytic H2 generation. The prepared CoS2/g-C3N4 hybrids display highly boosted photocatalytic H2 generation performance and outstanding cycle stability. The optimized 7%-CoS2/g-C3N4 hybrids show a much improved photocatalytic H2 generation rate of 36.2 μmol−1 h−1, which is about 180 times as much as bare g-C3N4 (0.2 μmol−1 h−1). In addition, the apparent quantum efficiency (AQE) of all the samples was computed under light at λ=370 nm, in which the AQE of 7%-CoS2/g-C3N4 hybrids is up to 5.72%. The experimental data and the DFT calculation suggest that the CoS2/g-C3N4 hybrid's excellent HER activity is attributable to the lower overpotential and the smaller Co-H bond activation energy for HER. Accordingly, the CoS2 cocatalyst loading effectively boosts the photocatalytic performance of g-C3N4 for H2 evolution. The project promotes fast development of high-efficiency photocatalysts and low-cost for photocatalytic H2 generation. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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