材料科学
等离子体增强化学气相沉积
X射线光电子能谱
等离子体
纳米结构
透射电子显微镜
化学气相沉积
薄脆饼
退火(玻璃)
纳米技术
分析化学(期刊)
化学工程
复合材料
工程类
物理
化学
量子力学
色谱法
作者
Hyunho Seok,Inkoo Lee,Jinill Cho,Dong Jun Sung,In‐Keun Baek,Cheol-Hun Lee,Eungchul Kim,Sanghuck Jeon,Kihong Park,Taesung Kim
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2021-10-22
卷期号:33 (2): 025603-025603
被引量:6
标识
DOI:10.1088/1361-6528/ac2b6c
摘要
Nanostructural modification of two-dimensional (2D) materials has attracted significant attention for enhancing hydrogen evolution reaction (HER) activity. In this study, the nanostructure of TaS2films was controlled by controlling the Ar/H2S gas ratio used in plasma-enhanced chemical vapor deposition (PECVD). At a high Ar/H2S gas ratio, vertically aligned TaS2(V-TaS2) films were formed over a large-area (4 in) at a temperature of 250 °C, which, to the best of our knowledge, is the lowest temperature reported for PECVD. Furthermore, the plasma species formed in the injected gas at various Ar/H2S gas ratios were analyzed using optical emission spectroscopy to determine the synthesis mechanism. In addition, the 4 in wafer-scale V-TaS2was analyzed by x-ray photoelectron spectroscopy, transmission electron microscopy, and atomic force microscopy, and the HER performance of the as-synthesized TaS2fabricated with various Ar/H2S ratios was measured. The results revealed that, depending on the film structure of TaS2, the HER performance can be enhanced owing to its structural advantage. Furthermore, the excellent stability and robustness of V-TaS2was confirmed by conducting 1000 HER cycles and post-HER material characterization. This study provides important insights into the plasma-assisted nanostructural modification of 2D materials for application as enhanced electrocatalysts.
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