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

doi:10.1039/d3cy00590a

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

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	5180-5189
Number of pages	10
Journal	Catalysis Science and Technology
Volume	13
Issue number	18
DOIs	https://doi.org/10.1039/d3cy00590a
Publication status	Published - 2023 Jul 25

All Science Journal Classification (ASJC) codes

Catalysis

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title = "Bismuth phosphate nanoparticle catalyst for direct oxidation of methane into formaldehyde",

abstract = "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.",

author = "Aoi Matsuda and Kazuhiko Obara and Atsushi Ishikawa and Tsai, {Meng Hsuan} and Wang, {Chia Hsin} and Lin, {Yu Chuan} and Michikazu Hara and Keigo Kamata",

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doi = "10.1039/d3cy00590a",

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T1 - Bismuth phosphate nanoparticle catalyst for direct oxidation of methane into formaldehyde

AU - Matsuda, Aoi

AU - Obara, Kazuhiko

AU - Ishikawa, Atsushi

AU - Tsai, Meng Hsuan

AU - Wang, Chia Hsin

AU - Lin, Yu Chuan

AU - Hara, Michikazu

AU - Kamata, Keigo

PY - 2023/7/25

Y1 - 2023/7/25

N2 - 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.

AB - 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.

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U2 - 10.1039/d3cy00590a

DO - 10.1039/d3cy00590a

M3 - Article

AN - SCOPUS:85167507659

SN - 2044-4753

VL - 13

SP - 5180

EP - 5189

JO - Catalysis Science and Technology

JF - Catalysis Science and Technology

IS - 18

ER -

Bismuth phosphate nanoparticle catalyst for direct oxidation of methane into formaldehyde

Abstract

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