Turbostratic carbon nitride enhances the performance and stability of cadmium sulfide nanorod hydrogen evolution photocatalysts,Inorganic Chemistry Frontiers

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Turbostratic carbon nitride enhances the performance and stability of cadmium sulfide nanorod hydrogen evolution photocatalysts
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-09-30 00:00:00 , DOI: 10.1039/c7qi00419b
Xuemei Zhou _{1,

2,

3,

4,

5} , Timothy L. Shelton _{6,

7,

8,

9} , Zhaoming Xia _{1,

2,

3,

4,

5} , Yuanyuan Ma _{1,

2,

3,

4,

5}

Affiliation

We report CdS nanorods encapsulated in a thin amorphous t-phased CN_x layer modified with Pt nanoparticles (CdS/CN_x-Pt) as photocatalysts for hydrogen production in 0.35 M Na₂S and 0.25 M Na₂SO₃ solution. Compared to CdS/Pt counterparts, the CdS/CN_x-Pt catalysts deliver more efficient and extraordinary stabilized catalytic activity. Herein, the t-CN_x layer functions as (1) a protection layer to isolate CdS from the electrolyte and suppress the anodic photocorrosion of CdS and (2) as a tunnel junction to promote charge separation and electron transport to PtNPs for proton reduction. Surface photovoltage spectra (SPS) confirm 2.25 eV as the effective bandgap and the n-type character of the CdS nanorods. Photoelectron injection into the PtNPs and photohole injection into the sacrificial donors can be directly observed.

中文翻译：

层状氮化碳增强了硫化镉纳米棒析氢光催化剂的性能和稳定性

我们报告CdS纳米棒封装在Pt纳米粒子（CdS / CN _x -Pt）修饰的非晶态t相薄_x非晶态CN _x层中作为光催化剂，用于在0.35 M Na ₂ S和0.25 M Na ₂ SO ₃溶液中产生氢气。与CdS / Pt对应物相比，CdS / CN _x -Pt催化剂具有更高的效率和异常稳定的催化活性。在此，t-CN _x该层用作（1）保护层，以将CdS与电解质隔离并抑制CdS的阳极光腐蚀；以及（2）作为隧道结，以促进电荷分离和电子向PtNPs的迁移，从而减少质子。表面光电压谱（SPS）确认2.25 eV是CdS纳米棒的有效带隙和n型特征。可以直接观察到PtNPs中的光电子注入和牺牲供体中的光孔注入。

更新日期：2017-11-08

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