Vijayan Aruna, Sandhyarani N
Nanoscience Research Laboratory, School of Materials Science and Engineering, National Institute of Technology Calicut, Calicut, Kerala, India.
Nanoscience Research Laboratory, School of Materials Science and Engineering, National Institute of Technology Calicut, Calicut, Kerala, India.
J Colloid Interface Sci. 2022 Oct;623:819-831. doi: 10.1016/j.jcis.2022.05.107. Epub 2022 May 21.
Two-dimensional transition metal dichalcogenides (TMD) are promising cost-effective catalysts for electrochemical/photoelectrochemical hydrogen evolution reactions (HER). One of the strategies to enhance the inherent HER activity of a catalyst is to form heterostructures. Herein, a facile thermal treatment method is reported for the synthesis of a novel heterostructure catalyst, Molybdenum disulphide-Molybdenum trioxide-Rhenium oxide (MoS-MoO-ReO), for HER. MoS-MoO-ReO composite is prepared using bulk MoS, which is otherwise known as a weak HER catalyst. Electrochemical and photoelectrochemical studies substantiate the enhanced catalytic activity of the MoS-MoO-ReO composite than the MoS bulk towards HER. The Mott-Schottky analysis suggests the formation of p-n heterojunction, which offers large interfacial contact and facilitates easier charge separation and transfer of photogenerated charge carriers resulting in an improved photoelectrocatalytic activity. The catalyst exhibits excellent stability, confirmed by the repeated cycles of reaction.
二维过渡金属二硫属化物（TMD）是用于电化学/光电化学析氢反应（HER）的有前景的经济高效催化剂。增强催化剂固有HER活性的策略之一是形成异质结构。在此，报道了一种简便的热处理方法用于合成用于HER的新型异质结构催化剂，二硫化钼-三氧化钼-氧化铼（MoS-MoO-ReO）。MoS-MoO-ReO复合材料是使用块状MoS制备的，而块状MoS是一种较弱的HER催化剂。电化学和光电化学研究证实了MoS-MoO-ReO复合材料相对于块状MoS对HER具有增强的催化活性。莫特-肖特基分析表明形成了p-n异质结，其提供了大的界面接触并促进了光生电荷载流子的更容易的电荷分离和转移，从而提高了光电催化活性。通过重复的反应循环证实该催化剂具有优异的稳定性。
