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Solvothermal Synthesis of Defect-Rich Mixed 1T-2H MoS2 Nanoflowers for Enhanced Hydrodesulfurization
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-04-17 , DOI: 10.1021/acssuschemeng.0c00736 Hongwei Cao 1 , Zhe Bai 1 , Yueting Li 1 , Zhourong Xiao 1 , Xiangwen Zhang 1, 2 , Guozhu Li 1, 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-04-17 , DOI: 10.1021/acssuschemeng.0c00736 Hongwei Cao 1 , Zhe Bai 1 , Yueting Li 1 , Zhourong Xiao 1 , Xiangwen Zhang 1, 2 , Guozhu Li 1, 2
Affiliation
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Hydrodesulfurization (HDS) is one of the most efficient methods to remove harmful sulfur from oil to produce clean hydrocarbons. Molybdenum sulfide (MoS2) has been used extensively for HDS for several decades, which can be further improved toward more effective catalysts due to its distinctive phase-engineering nature. Here, 1T-2H mixed-phase MoS2 nanoflowers with tunable defects have been synthesized and used in the HDS reaction. A facile solvothermal method involving water, ethanol, and glycerin has been developed for generating stable mixed 1T-2H MoS2 in which the vacancies of both S and Mo have been produced. Detailed characterizations based on transmission electron microscopy, X-ray photoelectron spectra, Raman, and electron paramagnetic resonance show that the 1T/2H ratio and vacancies of MoS2 have been effectively tuned by changing the composition of solvothermal solvent. Temperature-programmed reduction results show greatly affected H2 adsorption behavior of MoS2 by engineering of the phases and defects. In the HDS of dibenzothiophene, stable defect-rich mixed 1T-2H MoS2 with high activity and high hydrogenation selectivity was obtained via the accurately controlled solvothermal environment of water, ethanol, and glycerin. The used catalyst still maintains high performance, which is attributed to the retained mixed 1T-2H phases and the dual defects in the harsh reaction environment.
中文翻译：
溶剂热合成富含缺陷的混合1T-2H MoS 2纳米花以增强加氢脱硫
加氢脱硫（HDS）是从石油中去除有害硫以生产清洁碳氢化合物的最有效方法之一。硫化钼（MoS 2）已广泛用于HDS数十年，由于其独特的相工程性质，可以进一步改进为更有效的催化剂。在这里，已合成具有可调缺陷的1T-2H混合相MoS 2纳米花，并用于HDS反应中。已开发出一种包含水，乙醇和甘油的轻松溶剂热法来生成稳定的混合1T-2H MoS 2其中产生了S和Mo的空位。基于透射电子显微镜，X射线光电子能谱，拉曼光谱和电子顺磁共振的详细表征表明，通过改变溶剂热溶剂的组成，可以有效地调节MoS 2的1T / 2H比和空位。程序升温还原的结果表明，通过相和缺陷的工程化，MoS 2的H 2吸附行为受到很大影响。在二苯并噻吩的HDS中，稳定的富含缺陷的混合1T-2H MoS 2通过精确控制水，乙醇和甘油的溶剂热环境，获得了具有高活性和高氢化选择性的催化剂。所使用的催化剂仍保持高性能，这归因于保留的混合1T-2H相和苛刻的反应环境中的双重缺陷。
更新日期：2020-04-17
中文翻译：
溶剂热合成富含缺陷的混合1T-2H MoS 2纳米花以增强加氢脱硫
加氢脱硫（HDS）是从石油中去除有害硫以生产清洁碳氢化合物的最有效方法之一。硫化钼（MoS 2）已广泛用于HDS数十年，由于其独特的相工程性质，可以进一步改进为更有效的催化剂。在这里，已合成具有可调缺陷的1T-2H混合相MoS 2纳米花，并用于HDS反应中。已开发出一种包含水，乙醇和甘油的轻松溶剂热法来生成稳定的混合1T-2H MoS 2其中产生了S和Mo的空位。基于透射电子显微镜，X射线光电子能谱，拉曼光谱和电子顺磁共振的详细表征表明，通过改变溶剂热溶剂的组成，可以有效地调节MoS 2的1T / 2H比和空位。程序升温还原的结果表明，通过相和缺陷的工程化，MoS 2的H 2吸附行为受到很大影响。在二苯并噻吩的HDS中，稳定的富含缺陷的混合1T-2H MoS 2通过精确控制水，乙醇和甘油的溶剂热环境，获得了具有高活性和高氢化选择性的催化剂。所使用的催化剂仍保持高性能，这归因于保留的混合1T-2H相和苛刻的反应环境中的双重缺陷。
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