Enhanced photoelectrocatalytic hydrogen production performance of porous MoS2/PPy/ZnO film under visible light irradiation
Enhanced photoelectrocatalytic hydrogen production performance of porous MoS2/PPy/ZnO film under visible light irradiation
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DOI：
10.1016/j.ijhydene.2021.08.083
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发表时间：
2021-08
影响因子：
7.2
通讯作者：
J. Xue;Han Zhang;Qianqian Shen;Wenjin Zhang;Jiaqi Gao;Qi Li;Xuguang Liu;H. Jia
中科院分区：
文献类型：
--
作者：
J. Xue;Han Zhang;Qianqian Shen;Wenjin Zhang;Jiaqi Gao;Qi Li;Xuguang Liu;H. Jia
光电化学（PEC）水分解为制氢提供了一种“绿色”途径。然而，高效催化剂的设计和制造是PEC水裂解的瓶颈，因为涉及热力学和动力学方面的挑战。在此，我们报道了一种新的策略，构建具有大比表面积和优异导电性的多孔MoS2/PPy/ZnO薄膜光催化剂，以实现可见光照射下的光电化学水分解。通过模板辅助电沉积法合成多孔PPy/ZnO，并进一步电沉积MoS2，构建多孔MoS2/PPy/ZnO薄膜光催化剂。在可见光照射下，MoS2/PPy/ZnO的析氢速率达到40.22 μmol cm−2h−1，提高了约3.5倍。光电化学制氢的增强不仅归因于多孔结构的比表面积增大，还归因于mos2和多孔PPy/ZnO的协同作用，可以显著提高其可见光吸收能力，增强光生电荷的分离和转移。因此，更丰富的光生电子和空穴参与了光电化学过程，显著提高了其光电化学制氢性能。
Photoelectrochemical (PEC) water splitting provides a “green” approach for hydrogen production. However, the design and fabrication of high-efficient catalysts are the bottleneck for PEC water splitting owing to the involved thermodynamic and kinetic challenges. Herein, we report a new strategy for constructing a porous MoS2/PPy/ZnO thin film photocatalyst with large specific surface area and excellent conductivity to achieve photoelectrochemical water splitting under visible light irradiation. Porous PPy/ZnO was synthesized via template-assisted electrodeposition, and MoS2was further electrodeposited to construct porous MoS2/PPy/ZnO thin film photocatalyst. The hydrogen evolution rate of MoS2/PPy/ZnO exhibits about 3.5-fold increase to 40.22 μmol cm−2h−1under visible light irradiation. The enhancement for photoelectrochemical hydrogen production is not only ascribed to enlarged specific surface area of the porous structure, but also attributed to the synergistic effects of MoS2and porous PPy/ZnO, which could dramatically improve its visible light absorption capacity and enhance the separation and transfer of photogenerated charges. Thus, more abundant photogenerated electrons and holes participate in photoelectrochemical process, which significantly enhances its photoelectrochemical hydrogen production performance.