Amorphous tungsten phosphosulphide-modified CdS nanorods as a highly efficient electron-cocatalyst for enhanced photocatalytic hydrogen production.,Physical Chemistry Chemical Physics

当前位置： X-MOL 学术 › Phys. Chem. Chem. Phys. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Amorphous tungsten phosphosulphide-modified CdS nanorods as a highly efficient electron-cocatalyst for enhanced photocatalytic hydrogen production.
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2020-01-08 , DOI: 10.1039/c9cp04724g
Qiyan Jian ₁ , Xuqiang Hao , Zhiliang Jin , Qingxiang Ma

Affiliation

Improving the utilization rate of photogenerated electrons generated by visible light excitation is an important factor to improve the activity of photocatalytic decomposition of water for hydrogen evolution. In this study, amorphous tungsten phosphosulphide nanoparticle (WPS NP)-modified CdS (WPS/CdS) catalysts were successfully prepared by a simple physical mixing method. The activity of the 15% WPS/CdS composite catalyst is the best, and the average hydrogen production rate reached 123 257 μmol g-1 in 5 h, and the highest AQE of 9.15% is derived at 420 nm for the 15% WPS/CdS composite catalyst. Simultaneously, five cycle stability tests were performed on the 15% WPS/CdS composite catalyst, and the results show that the 15% WPS/CdS composite catalyst exhibits a high stability. WPS NPs not only improve the visible light absorption rate, but also provide a large number of exposed active sites for the hydrogen evolution reaction. These active sites can capture photogenerated electrons on CdS NRs quickly, and can be used for the hydrogen evolution reaction quickly, promoting the transmission and separation of photogenerated charges and inhibiting the recombination of photogenerated electron and hole pairs. Thus, the utilization rate of photogenerated electrons generated by visible light is improved, and the activity of the photocatalyst is significantly increased.

中文翻译：

非晶态磷硫化钨修饰的CdS纳米棒是用于增强光催化产氢的高效电子助催化剂。

提高可见光激发产生的光生电子的利用率是提高水对氢的光催化分解活性的重要因素。在这项研究中，通过简单的物理混合方法成功地制备了无定形磷酸硫钨纳米颗粒（WPS NP）改性的CdS（WPS / CdS）催化剂。15％WPS / CdS复合催化剂的活性最佳，在5小时内平均产氢率达到123257μmolg-1，对于15％WPS / C，在420 nm处的最高AQE为9.15％。 CdS复合催化剂。同时，对15％WPS / CdS复合催化剂进行了5次循环稳定性测试，结果表明15％WPS / CdS复合催化剂具有较高的稳定性。WPS NP不仅提高了可见光吸收率，而且还为氢释放反应提供了大量暴露的活性位点。这些活性位点可快速捕获CdS NRs上的光生电子，并可快速用于氢释放反应，促进光生电荷的传输和分离，并抑制光生电子与空穴对的重组。因此，提高了由可见光产生的光生电子的利用率，并且显着提高了光催化剂的活性。促进光生电荷的传输和分离，并抑制光生电子和空穴对的复合。因此，提高了由可见光产生的光生电子的利用率，并且显着提高了光催化剂的活性。促进光生电荷的传输和分离，并抑制光生电子和空穴对的复合。因此，提高了由可见光产生的光生电子的利用率，并且显着提高了光催化剂的活性。

更新日期：2020-01-08

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11