Efficient visible-light-driven photocatalytic H-2 evolution over MoO2-C/CdS ternary heterojunction with unique interfacial microstructures
Efficient visible-light-driven photocatalytic H-2 evolution over MoO2-C/CdS ternary heterojunction with unique interfacial microstructures
复制标题
具有独特界面微结构的 MoO2-C/CdS 三元异质结上高效可见光驱动的光催化 H-2 析出
DOI：
10.1016/j.apcatb.2019.118153
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
ong
中科院分区：
文献类型：
--
作者：
Wei Wenkang;Tian Qinfen;Sun Huasheng;Liu Ping;Zheng Yi;Fan Mizi;Zhuang Ji;ong
钼基助催化剂装饰是构建利用阳光析氢的高效光催化剂复合材料的一种有前途的策略。在这项工作中，成功构建了一种具有独特界面微结构的新型MoO2-C/CdS（MOCCS）三元异质结光催化剂。在 MoO2-C 纳米复合材料中可以发现界面无序的 MoOx 区域，它是光催化水分解的主要活性位点。而对于三元异质结，直接的界面Mo-S键和金属Cd可以保证MoO2-C和CdS纳米棒之间高效的界面电荷分离和转移。所制备的 MOCCS 复合材料显示出光催化析氢性能的显着增强（∼16.08mmol·h−1g−1），高达纯 CdS 纳米棒的 33 倍。光电化学分析表明，独特的界面微结构的协同效应将导致光载流子的有效分离和反应，并降低光催化水分解过程中的氢过电势。
Molybdenum-based co-catalyst decoration is a promising strategy in the construction of an highly efficient photocatalyst composite for hydrogen evolution utilizing sunlight. In this work, a novel MoO2-C/CdS (MOCCS) ternary heterojunction photocatalyst with unique interfacial microstructures has been successfully constructed. The interfacial disordered MoOxregions, which act as the main active sites for photocatalytic water splitting, can be found in the MoO2-C nanocomposites. While for the ternary heterojunction, the direct interfacial Mo-S bonds and metallic Cd can guarantee the high-effect interfacial charge separation and transfer between MoO2-C and CdS nanorods. The as-prepared MOCCS composite shows a remarkable enhancement of photocatalytic H2evolution performance (∼16.08 mmol·h−1g−1), which is up to 33 times as high as that of pure CdS nanorods. Photoelectrochemical analyses demonstrate that the synergetic effect of unique interfacial microstructures will result in the efficient separation and reaction of the photocarriers, and the reduced hydrogen overpotential during photocatalytic water splitting process.