A Yin-Yang hybrid co-catalyst (CoOx-Mo2N) for photocatalytic overall water splitting
A Yin-Yang hybrid co-catalyst (CoOx-Mo2N) for photocatalytic overall water splitting
复制标题
用于光催化整体水分解的阴阳混合助催化剂（CoOx-Mo2N）
DOI：
10.1016/j.apcatb.2021.120491
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发表时间：
2021-07-10
影响因子：
22.1
通讯作者：
Han, Hongxian
中科院分区：
文献类型：
--
作者：
Ma, Baojun;Dang, Yuying;Han, Hongxian
传统的半导体上双共催化剂整体分解水的理论是，双共催化剂在空间上分开，分别用于光催化放氢和放氧。然而，这一理论忽略了表面激子和水作为一个整体分子进行分裂的作用。在这里，我们提出了一种新型阴阳杂化助催化剂(CoOx-Mo2N)，它对每个组分具有相反的功能，以实现高效的裂水。(CoOx-Mo2N)/Ge3N4的催化活性是空间分离的CoOx和Mo2N双组分催化剂负载Ge3N4的1.5倍。阴阳杂化的超高性能归因于相邻空间构型的额外使用表面激子、更有利的水分子吸收以及以过氧化氢为中间体参与水分解的两个电子反应路径。提出了通过空间相邻的阴阳杂化助催化剂额外使用表面激子对传统的双空间分离助催化剂的修正理论。
Conventional theory of dual co-catalysts on a semiconductor in overall water splitting is that the dual co-catalysts spatially separated for photocatalytic H-2 and O-2 evolution, respectively. However, this theory ignores the use of the surface exciton and the water as a whole molecular for splitting. Here, we put forward a new Yin-Yang hybrid co-catalyst (CoOx-Mo2N) with opposite functions for each component for efficient water splitting. The (CoOx-Mo2N) / Ge3N4 shows activities 1.5 times higher than that Ge3N4 loaded with the spatial separated dual co-catalysts CoOx and Mo2N. The super properties of the Yin-Yang hybrid are attributed to the adjacent spatial configuration for extra use of surface excitons, more favorable water molecular absorption and two electrons reactive path with H2O2 as intermediate involved in water splitting. It is proposed an amendment theory for conventional dual spatially separated co-catalysts by extra using surface exciton via spatially adjacent Yin-Yang hybrid co-catalyst.