التفاصيل البيبلوغرافية
| العنوان: |
Carbon intercalated MoS2 cocatalyst on g-C3N4 photo-absorber for enhanced photocatalytic H2 evolution under the simulated solar light. |
| المؤلفون: |
Wei, Xuegang1,2,3 (AUTHOR), Zhang, Xiaqing1 (AUTHOR), Ali, Salamat1 (AUTHOR), Wang, Jiatai2,3 (AUTHOR), Zhou, Yongjie2 (AUTHOR), Chen, Hao2 (AUTHOR), Zhang, Guangan4 (AUTHOR), Qi, Jing1 (AUTHOR) qijing@lzu.edu.cn, He, Deyan1 (AUTHOR) |
| المصدر: |
International Journal of Hydrogen Energy. Apr2023, Vol. 48 Issue 37, p13827-13842. 16p. |
| مصطلحات موضوعية: |
*HYDROGEN evolution reactions, *DENSITY functional theory, *AGGLOMERATION (Materials), *CARBON, *CATALYTIC activity, *SOLAR energy, *CHARGE transfer |
| مستخلص: |
Despite MoS 2 being a promising non-precious-metal cocatalyst, poor electronic conductivity and low activity for hydrogen evolution caused by serious agglomeration have been identified as critical roadblocks to further developing MoS 2 cocatalyst for photocatalytic water splitting using solar energy. In this work, the density functional theory calculations reveal that carbon intercalated MoS 2 (C-MoS 2) has excellent electronic transport properties and could effectively improve catalytic activity. The experiment results show that the prepared tremella-like C-MoS 2 nanoparticles have large interlayer spacing along the c-axis direction and high dispersion because of intercalation of the carbon between adjacent MoS 2 layers. Furthermore, the heterostructure photocatalyst of C-MoS 2 @g-C 3 N 4 formed by loading the cocatalyst of C-MoS 2 onto g-C 3 N 4 nanosheets exhibits the H 2 evolution rate of 157.14 μmolg−1h−1 when containing 5 wt% C-MoS 2. The high photocatalytic H 2 production activity of the 5 wt% C-MoS 2 @g-C 3 N 4 can be attributed to the intercalated conductive carbon layers in MoS 2 , which leads to efficient charge separation and transfer as well as increased activities of the edge S atoms for H 2 evolution. We believe that the C-MoS 2 will offer great potential as a photocatalytic H 2 evolution reaction cocatalyst with high efficiency and low cost. [Display omitted] • The intercalation of carbon between adjacent MoS 2 layers efficiently promotes electronic conductivity of MoS 2 cocatalyst. • The intercalation of carbon layers is beneficial to improving the activity of the edge S atoms. • The intercalated carbon layers effectively prevents the stacking of atomic layers (S–Mo–S). • The 5 wt% C-MoS 2 @g-C 3 N 4 exhibits remarkable photocurrent responses and efficient H 2 evolution performance. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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