基质(水族馆)
氧气
材料科学
化学工程
纳米技术
结晶学
化学
有机化学
海洋学
地质学
工程类
作者
Young Jin Park,Hee‐Soo So,Hyun-Tae Hwang,Da Sol Jeong,Hoon Ju Lee,Jongsun Lim,Chang Gyoun Kim,Hyeon Suk Shin
出处
期刊:ACS Nano
[American Chemical Society]
日期:2022-07-01
卷期号:16 (7): 11059-11065
被引量:15
标识
DOI:10.1021/acsnano.2c03762
摘要
The metallic property of metastable 1T′ WSe2 and its promising catalytic performance have attracted considerable interest. A hot injection method has been used to synthesize 1T′ WSe2 with a three-dimensional morphology; however, this method requires two or more precursors and long-chain ligands, which inhibit the catalytic performance. Here, we demonstrate the synthesis of 1T′ WSe2 on a substrate by a simple heating-up method using a single precursor, tetraethylammonium tetraselenotungstate [(Et4N)2WSe4]. The triethylamine produced after the reaction is an electron donor that yields negatively charged WSe2, which is stabilized by triethylammonium cations as intercalants between layers and induces 1T′ WSe2. The purity of 1T′ WSe2 is higher on oxygen-containing crystalline substrates than amorphous substrates because the strong adhesion between WSe2 and the substrate can produce sufficient triethylammonium (TEA) intercalation. Among the oxygen-containing crystal substrates, the substrate with a lower lattice mismatch with 1T′ WSe2 showed higher 1T′ purity due to the uniform TEA intercalation. Furthermore, 1T′ WSe2 on carbon cloth exhibited a more enhanced catalytic performance in the hydrogen evolution reaction (197 mV at 10 mA/cm2) than has been reported previously.
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