水热合成再掺杂 MoS 花状微球上的电化学析氢。
Electrochemical Hydrogen Evolution over Hydrothermally Synthesized Re-Doped MoS Flower-Like Microspheres.
机构信息
Departamento de Química, Universidad Tecnológica Metropolitana, Las Palmeras 3360, Ñuñoa, Santiago, Chile.
Centro de Investigaciones Costeras de la Universidad de Atacama (CIC-UDA), Universidad de Atacama, Copayapu 485, Copiapó, Chile.
出版信息
Molecules. 2019 Dec 17;24(24):4631. doi: 10.3390/molecules24244631.
In this research, we report a simple hydrothermal synthesis to prepare rhenium (Re)- doped MoS flower-like microspheres and the tuning of their structural, electronic, and electrocatalytic properties by modulating the insertion of Re. The obtained compounds were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). Structural, morphological, and chemical analyses confirmed the synthesis of poorly crystalline Re-doped MoS flower-like microspheres composed of few stacked layers. They exhibit enhanced hydrogen evolution reaction (HER) performance with low overpotential of 210 mV at current density of 10 mA/cm, with a small Tafel slope of 78 mV/dec. The enhanced catalytic HER performance can be ascribed to activation of MoS basal planes and by reduction in charge transfer resistance during HER upon doping.
在这项研究中，我们报告了一种简单的水热合成方法，用于制备铼（Re）掺杂的 MoS 花状微球，并通过调节 Re 的插入来调整其结构、电子和电催化性能。通过 X 射线衍射（XRD）、扫描电子显微镜（SEM）、高分辨率透射电子显微镜（HRTEM）、拉曼光谱和 X 射线光电子能谱（XPS）对获得的化合物进行了表征。结构、形态和化学分析证实了由少量堆叠层组成的结晶性差的 Re 掺杂 MoS 花状微球的合成。它们表现出增强的析氢反应（HER）性能，在电流密度为 10 mA/cm 时具有 210 mV 的低过电位，具有 78 mV/dec 的小 Tafel 斜率。掺杂后，HER 过程中 MoS 基面的活化和电荷转移电阻的降低可以归因于增强的催化 HER 性能。
Zotero 插件