Direct methylation of benzene with methane over Co/MFI catalysts generated by self-dispersion of Co(OH)2†

IF 4.4 3区化学 Q2 CHEMISTRY, PHYSICAL

Catalysis Science & Technology Pub Date : 2023-09-01 DOI:10.1039/D3CY00305A

Kazu Okumura, Kai Tanaka, Akimichi Ohtsuki, Hikaru Iiyoshi and Naonobu Katada

引用次数: 1

Abstract

A methane–benzene reaction was performed over Co/MFI prepared with an aqueous solution of Co(OAc)₂ and MFI zeolite. Co(OH)₂ was deposited on the MFI zeolite when the Co(OAc)₂ solution was stirred at 343 K in the presence of MFI. A decline of the h-peak in NH₃ TPD occurred during the loading of Co on MFI. Further thermal treatment at 573–773 K caused the spontaneous formation of the atomically dispersed Co species, which was observed with Co K-edge XAFS. The toluene formation rate of the catalyst prepared with Co(OAc)₂ was proportional to the Co loading and was higher than that prepared with Co(NO₃)₂ due to the large amount of supported Co.

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Co（OH）2自分散产生的Co/MFI催化剂上苯与甲烷的直接甲基化†

在用Co（OAc）2和MFI沸石的水溶液制备的Co/MFI上进行甲烷-苯反应。当在MFI存在下在343K下搅拌Co（OAc）2溶液时，Co（OH）2沉积在MFI沸石上。在MFI上负载Co的过程中，NH3 TPD中的h峰下降。573–773 K下的进一步热处理导致原子分散的Co物种的自发形成，这是用Co K-edge XAFS观察到的。用Co（OAc）2制备的催化剂的甲苯形成速率与Co负载量成比例，并且由于负载了大量的Co而高于用Co（NO3）2制得的催化剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catalysis Science & Technology CHEMISTRY, PHYSICAL-

CiteScore

8.70

自引率

6.00%

发文量

587

审稿时长

1.5 months

期刊介绍： A multidisciplinary journal focusing on cutting edge research across all fundamental science and technological aspects of catalysis. Editor-in-chief: Bert Weckhuysen Impact factor: 5.0 Time to first decision (peer reviewed only): 31 days