Integrating Mo2Bx (x = 1, 4) with CdS for efficient photocatalytic hydrogen production
Integrating Mo2Bx (x = 1, 4) with CdS for efficient photocatalytic hydrogen production
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将 Mo2Bx (x = 1, 4) 与 CdS 集成，实现高效光催化制氢
DOI：
10.1016/j.cej.2020.128339
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发表时间：
2021-04
影响因子：
15.1
通讯作者：
Ding Yong
中科院分区：
文献类型：
--
作者：
Meng Xiangyu;Yang Junyi;Xu Shiming;Zhang Chenchen;Ma Baochun;Ding Yong
钼基化合物，如MoCx、MoSe 2、MoS2、MoPx、MoOx及其衍生物，无论是在电催化还是光催化析氢反应（HER）中，都被认为是铂（Pt）的替代催化剂。这意味着钼基化合物在解决能源危机和环境污染方面具有巨大的应用潜力。在此，首次，未开发的Mo2Bx（x = 1或4）作为可见光驱动的光催化制氢系统中的活性组分进行了研究。实验结果表明，当与CdS或有机光敏剂结合时，它们都表现出优异的析氢活性。另外，对于同一种捕光材料，Mo2B4的光催化HER活性明显优于Mo2B。这清楚地表明它们的光催化活性受缺电子原子B含量的影响，并且在光催化HER中表现出强烈的B依赖性。其中它基本上是由光捕获材料和Mo 2 Bx样品之间的电子转移（ET）速率的差异引起的，并且仅仅表现为B依赖性。此外，还讨论了HER中的电催化与电催化的关系。
Molybdenum based compounds, such as MoCx, MoSe2, MoS2MoPx, MoOxand their derivatives, have been considered as the alternative catalysts for platinum (Pt) whether in electrocatalytic or photocatalytic hydrogen evolution reaction (HER). This means molybdenum based compounds have great application potential in solving the energy crisis and environmental pollution. Herein, for the first time, the unexplored Mo2Bx(x = 1 or 4) were investigated as the active components in a visible-light driven photocatalytic hydrogen production system. Experimental results demonstrate that they both exhibit excellent hydrogen evolution activities when combined with CdS or organic photosensitizers. Additionally, for the same kind of light-harvesting material, the photocatalytic HER activity of Mo2B4is obviously better than that of Mo2B. This clearly indicates the photocatalytic activities of them are affected by the content of electron deficient atom boron (B) in Mo2Bxsamples and exhibits a strong B dependence in photocatalytic HER. The reason for this B dependency is studied in detail by photo/electrochemical methods and optical characterizations in this work, where it is essentially caused by the difference in the electron transfer (ET) rates between light-harvesting material and Mo2Bxsamples and just manifested as B dependency. Additionally, the relation between photocatalysis and electrocatalysis in HER is discussed.
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