Hybrid Phase MoS2 as a Noble Metal-Free Photocatalyst for Conversion of Nitroaromatics to Aminoaromatics,The Journal of Physical Chemistry C

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Hybrid Phase MoS2 as a Noble Metal-Free Photocatalyst for Conversion of Nitroaromatics to Aminoaromatics
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2021-09-21 , DOI: 10.1021/acs.jpcc.1c06236
Yuxiao Zhang ₁ , Yasutaka Kuwahara _{1,

2,

3,

4} , Kohsuke Mori _{1,

2,

3} , Xufang Qian ₅ , Yixin Zhao ₅ , Hiromi Yamashita _{1,

2,

3}

Affiliation

Molybdenum sulfide has attracted intense attention owing to unique heteromorphism. A natural molybdenum sulfide shows a semiconductive 2H crystal structure, while another metallic 1T-MoS₂ exhibits a higher catalytic activity. However, the strict synthetic condition and the metastable property of 1T-MoS₂ have limited its application. Hybrid-phase 1T/2H-MoS₂ possesses both higher catalytic activity than 2H-MoS₂ and better thermal/chemical stability than 1T-MoS₂, which is a more promising candidate in the catalytic field. As for photocatalytic field, 2H-MoS₂ has been only used as a cocatalyst but not as an individual photocatalyst due to its fast electron–hole recombination level and nonideal surface active site nature. Hybrid-phase MoS₂ would provide a proper solution for individual MoS₂ as a photocatalyst because 1T sites can collect photoelectrons and provide active sites for various reactions. In this work, we report a hybrid-phase MoS₂ synthesized by a simple hydrothermal method, which is applied to the photocatalytic conversion of a series of nitroaromatics to aminoaromatics. The reactions are not favorable with natural 2H-MoS₂, which reveals new potential of MoS₂ as a noble metal-free photocatalyst.

中文翻译：

杂化相二硫化钼作为无贵金属光催化剂，用于将硝基芳烃转化为氨基芳烃

硫化钼由于其独特的异形性而备受关注。天然硫化钼显示出半导体 2H 晶体结构，而另一种金属 1T-MoS ₂显示出更高的催化活性。然而，1T-MoS ₂严格的合成条件和亚稳态限制了其应用。杂化相1T/2H-MoS ₂具有比2H-MoS ₂更高的催化活性和比1T-MoS ₂更好的热/化学稳定性，是催化领域更有前景的候选材料。在光催化领域，2H-MoS ₂由于其快速的电子 - 空穴复合水平和非理想的表面活性位点性质，因此仅用作助催化剂而不用作单独的光催化剂。混合相MoS ₂将为单独的MoS ₂作为光催化剂提供合适的解决方案，因为1T 位点可以收集光电子并为各种反应提供活性位点。在这项工作中，我们报道了一种通过简单的水热法合成的混合相 MoS ₂，其应用于一系列硝基芳烃向氨基芳烃的光催化转化。该反应对天然 2H-MoS ₂不利，这揭示了 MoS ₂作为不含贵金属的光催化剂的新潜力。

更新日期：2021-09-30

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