Bismuth phosphate nanoparticle catalyst for direct oxidation of methane into formaldehyde

Aoi Matsuda, Kazuhiko Obara, Atsushi Ishikawa, Meng Hsuan Tsai, Chia Hsin Wang, Yu Chuan Lin, Michikazu Hara, Keigo Kamata

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

The direct oxidation of methane (CH4) to formaldehyde (HCHO) with molecular oxygen (O2) as the sole oxidant was studied over various bismuth-based catalysts (BiPO4, α-Bi2O3, β-Bi2O3) using a fixed-bed flow reactor. The catalytic activity of monoclinic BiPO4 nanoparticles (BiPO4-DEG) synthesized in a mixed solvent of diethylene glycol (DEG) and water for the direct oxidation of CH4 was the highest among the catalysts tested. In high temperature region, BiPO4-DEG was more selective for HCHO formation than FePO4 nanoparticles. Based on mechanistic studies including the catalyst effect, kinetics, pulse-reaction experiments, infrared (IR) spectroscopy, operando near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS), and density functional theory (DFT) calculations, surface active oxygen species generated on BiPO4 possibly react with CH4 to give HCHO as the primary product.

原文English
頁(從 - 到)5180-5189
頁數10
期刊Catalysis Science and Technology
13
發行號18
DOIs
出版狀態Published - 2023 7月 25

All Science Journal Classification (ASJC) codes

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