非晶态硫硒化钼作为低成本催化剂的电沉积
Electrodeposition of amorphous molybdenum sulfo-selenide as a low-cost catalyst
AI总结：
本研究通过单电解液电沉积技术合成非晶态Se-MoSx催化剂，证明硒的掺入能显著提升其电催化效能，为低成本电化学过程提供了可扩展方案。
摘要：
总体而言，由于缺乏离散的基面以及不同的结构排列，MoSx体系比传统的基于MoS2的体系展现出更高的催化活性。这增加了整体催化位点密度，同时短程原子排列提供了足够的电子电导率，使其能够用于电化学过程。在此，我们将先前通过在晶态体系中掺入Se来改善电催化的努力转化到聚合物体系中，因为a-MoSx中的几个活性位点具有与MoS2中相似的基序和键合环境。我们使用单电解液电沉积合成技术，以提供一种可扩展、低成本的材料。我们通过拉曼光谱、X射线光电子能谱、UV-Vis光谱和电化学方法进行全面研究，展示了电解液条件对薄膜物理、化学、电子和催化性质随硒含量变化的影响。这些结果共同突出了硒在Se-MoSx体系中促进这些催化剂催化效能的作用。
英文摘要：
Overall, the MoSx system has shown greater catalytic activity over the traditional MoS2 based systems due to the absence of discrete basal plane, and differing structural arrangements. This increases the overall catalytic site density alongside adequate electronic conductivity from short-range atomic arrangements that allow for use in electrochemical processes. Here we translate prior efforts to improve electrocatalysis via Se incorporation within the crystalline system to the polymeric system, as several of the active sites in the a-MoSx have similar motifs and bonding environments as those found in MoS2. We use a single-electrolyte electrodeposition synthesis technique in order to provide a scalable, low-cost material. We demonstrate the influence of the electrolyte conditions on the films physical, chemical, electronic, and catalytic properties as a function of selenium content through a comprehensive study via Raman spectroscopy, X-ray photoelectron spectroscopy, UV-Vis spectroscopy, and electrochemical methods. Together, these results highlight selenium's role in the Se-MoSx system in promoting the catalytic efficacy of these catalysts.
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