Carbon depositing is carried out at high calcination temperature after TiO₂ nanotube arrays (TNAs) produced from anodic oxidation of titanium foils is impregnated in glucose aqueous solution. The formed TNAs-C is then loaded with MoS_x via electrochemical deposition to prepare MoS_x/TNAs-C electrodes. The microstructure, morphology, and chemical composition of the samples are analyzed with XRD, XPS, EDS, SEM, and TEM. LSV, CV, Tafel, and EIS are conducted to provide electrochemical properties. Experimental results illustrate that carbonization of TNAs elevates the electron transport between the electrode and electrolyte, and within the electrode. The electrochemical desorption on the electrode surface is enhanced to promote the catalytic efficiency. Compared to MoS_x/TNAs, MoS_x/TNAs-C(0.2) offers overpotentials of 109 and 139 mV at current densities of –10 and –20 mA cm^–2, decreases of 33 and 42 mV, respectively. The double layer capacitance C_dl of 43 mF cm^–2, more than double that of MoS_x/TNAs (20 mF cm^–2). The stability test of the electrode shows no apparent decay.

Graphic Abstract

中文翻译：

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TiO 2纳米管阵列的碳沉积增强了非晶态MoS x的析氢反应

在将由钛箔的阳极氧化产生的TiO ₂纳米管阵列（TNA）浸渍在葡萄糖水溶液中之后，在高煅烧温度下进行碳沉积。然后通过电化学沉积将形成的TNAs-C加载MoS _x以制备MoS _x/ TNAs-C电极。用XRD，XPS，EDS，SEM和TEM分析样品的微观结构，形态和化学成分。进行LSV，CV，Tafel和EIS以提供电化学性能。实验结果表明，TNA的碳化提高了电极与电解质之间以及电极内部的电子传输。电极表面的电化学解吸作用得以增强，从而提高了催化效率。与MoS _x / TNAs相比，MoS _x /TNAs-C(0.2）在–10和–20 mA cm ^–2的电流密度下提供109和139 mV的过电势，分别降低了33和42 mV。双层电容C _dl为43 mF cm ^–2，是MoS _x / TNAs（20 mF cm ^–2）的两倍多。电极的稳定性测试表明没有明显的衰减。

图形摘要