利用紫外光原位制备用于按需光催化制氢的全非晶二氧化钛耦合-MoSx 光催化剂†。

IF 5 3区 材料科学 Q2 CHEMISTRY, PHYSICAL
Qian Dong, Yongxing Sun, Fang Wang, Zhengguo Zhang and Shixiong Min
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引用次数: 0

摘要

将光催化剂的原位制造与按需光催化水分裂产生的 H2 演化相结合,有望提高 H2 的利用效率。在这里,通过水解钛前驱体,然后在反应溶液中对 (NH4)2MoS4 进行光化学还原,按需进行光催化 H2 进化反应(HER),从而原位制备出所有非晶态二氧化钛耦合 MoSx 光催化剂(a-TM)。由于 a-TiO2 与 a-MoSx 助催化剂之间的紧密接触以及 a-MoSx 助催化剂上丰富的活性位点,光生电子可以从激发的 a-TiO2 快速转移到连接良好的 a-MoSx,从而实现高效的电荷分离,从而极大地促进了 HER 的动力学过程。在紫外光下,含有 2 mol% a-MoSx 的 a-TM2 表现出最高的 696.2 μmol h-1 H2 进化速率,是含有 2 mol% a-MoSx 助催化剂的基准 P25(PM2)的 2.7 倍。这项工作引入了一种新的概念,即原位制造半导体光催化剂,用于大规模按需光催化 HER。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

In situ fabrication of all amorphous TiO2-coupled-MoSx photocatalysts for on-demand photocatalytic hydrogen production by using UV light†

In situ fabrication of all amorphous TiO2-coupled-MoSx photocatalysts for on-demand photocatalytic hydrogen production by using UV light†

Intergrating in situ fabrication of photocatalysts with on-demand photocatalytic H2 evolution from water splitting holds immense promise for enhancing the H2 utilization efficiency. Herein, all amorphous TiO2-coupled-MoSx photocatalysts (a-TM) are in situ fabricated by hydrolyzing the Ti precursor followed by photochemical reduction of (NH4)2MoS4 in the reaction solution for on-demand photocatalytic H2 evolution reaction (HER). Thanks to the intimate contact between a-TiO2 and the a-MoSx cocatalyst, as well as abundant active sites on the a-MoSx cocatalyst, the photogenerated electrons can rapidly transfer from the excited a-TiO2 to the well-interconnected a-MoSx, leading to efficient charge separation, thereby greatly promoting the kinetics of the HER. The as-fabricated a-TM2 with 2 mol% a-MoSx exhibits the highest H2 evolution rate of 696.2 μmol h−1 under UV light, 2.7 times higher than that of benchmark P25 loaded with a 2 mol% a-MoSx cocatalyst (PM2). This work introduces a new concept of in situ fabricating semiconductor-based photocatalysts for on-demand photocatalytic HER at a large scale.

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来源期刊
Sustainable Energy & Fuels
Sustainable Energy & Fuels Energy-Energy Engineering and Power Technology
CiteScore
10.00
自引率
3.60%
发文量
394
期刊介绍: Sustainable Energy & Fuels will publish research that contributes to the development of sustainable energy technologies with a particular emphasis on new and next-generation technologies.
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