Skip to content
DraconiticResearch
Search Sources API
186,546 studies31 sourcesUpdated 55 min ago
PreprintCC BYChemRxiv

Microwave electric field-induced dynamic hydration enables selected dehydration of formic acid over a poly(m-phenolsulfonic acid–formaldehyde Catalyst

  • Hidenori Nishio1
  • Aya Ohno1
  • Nobutaka Maeda2,3
  • Abbas B. Askari2,3
  • Keiichiro Kashimura4,5
  • Takeshi Miyata4,5
  • Tetsuya Shishido6,7
  • Takeyuki Nogami6,7
  • Yuga Ezoe6,7
  • Yoichi M. A. Yamada1,2,3
7 affiliations
  1. 1RIKEN Center for Sustainable Resource Science
  2. 2Center for Energy Systems Design (CESD
  3. 3Kyushu University
  4. 4Faculty of Engineering
  5. 5Chubu University
  6. 6Graduate School of Urban Environmental Science
  7. 7Tokyo Metropolitan University
Open at sourcePDFDOICite

Abstract

Formic acid is a promising renewable C1 feedstock and a safe liquid precursor for on-demand carbon monoxide (CO) production. However, selective dehydration of formic acid to CO remains challenging because solid acid catalysts generally require high temperatures and suffer from competing dehydrogenation and water-induced inhibition of acid sites. Here, we report the selective dehydration of formic acid over a poly(m-phenolsulfonic acid–formaldehyde) (PAFR II) catalyst under microwave irradiation. PAFR II afforded CO in 65% yield at 120 C without detectable formation of hydrogen or carbon dioxide. The catalyst was reused three times while maintaining selective CO formation. PAFR II showed stable catalytic activity during continuousflow dehydration, exhibiting a CO productivity of 31–37 mmol g-1 h-1. This activity was higher than that of previously reported solid acid catalysts operating at or below 150 °C. The resulting CO was directly used for the alkoxycarbonylation of iodobenzene to afford propyl benzoate in 92% yield, demonstrating the practical applicability of this system as an on-demand CO source. Water-addition experiments showed that adsorbed water strongly inhibited dehydration. Microwave electric-field irradiation afforded substantially higher activity than magnetic-field irradiation and conventional heating. Fourier-transform infrared difference spectroscopy and phase-resolved modulation infrared spectroscopy revealed reversible changes in adsorbed water around the sulfonic acid moieties under microwave irradiation. These results suggest that the microwave electric field dynamically modulates the hydration structure around the acid sites, temporarily increasing their accessibility to formic acid.

Related

  1. Hydration-Controlled Coupling of Water Polarization and Proton Transport in Nafion Under External Electric Fields
    Daniel P. Luis-Jiménez, Luis A. Martínez-Santiago, Jonathan Toledo-Toledo +3
    PolymersPeer-reviewedCC BYFull textMaterials & polymersEurope PMC
  2. Metal‐Organic Framework‐Derived Metastable Cu2ZnSnS4/ZnS Heterojunction Realizes Kinetic‐Controlled Lattice Strain Engineering and Built‐In Electric Field Synergistically Enhanced Microwave Absorption
    Xiaomeng Guo, Zirui Jia, Shuang Xu +3
    Advanced Functional MaterialsPeer-reviewedLicence not statedFull text5 citedMaterials & polymersOpenAlex
  3. A Formaldehyde-Free, Soy Protein-Based Adhesive with P-N-Si Synergistic Flame Retardancy for Plywood Application
    Han Yang, Nicolas Gascoin, Liping Jiang +4
    PolymersPeer-reviewedCC BYFull textMaterials & polymersEurope PMC
  4. Incorporating Glass Wool into Urea–Formaldehyde Resin: Improvements in Fire Resistance and Dimensional Stability of Particleboards
    Michelângelo Vargas Fassarella, Izabella Luzia Silva Chaves, Emilly Soares Gomes Silva +4
    ACS omegaPeer-reviewedCC BYFull textGeneral chemistryEurope PMC
  5. Selective Adsorption Processes in Mordenite-Catalysed Ethanol Dehydration
    Matthew T. Robinson, Ben France, Glenn J. Sunley +3
    ChemRxivPreprintLicence not statedGeneral chemistryChemRxiv

Cite

BibTeXRIS
BibTeX
@misc{nishio2026microwave,
  title = {{Microwave electric field-induced dynamic hydration enables selected dehydration of formic acid over a poly(m-phenolsulfonic acid–formaldehyde Catalyst}},
  author = {Hidenori Nishio and Aya Ohno and Nobutaka Maeda and Abbas B. Askari and Keiichiro Kashimura and Takeshi Miyata and Tetsuya Shishido and Takeyuki Nogami and Yuga Ezoe and Yoichi M. A. Yamada},
  howpublished = {ChemRxiv},
  year = {2026},
  month = sep,
  doi = {10.26434/chemrxiv.15008639/v1},
  url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008639/v1},
  note = {CC BY},
}
RIS
TY  - UNPB
TI  - Microwave electric field-induced dynamic hydration enables selected dehydration of formic acid over a poly(m-phenolsulfonic acid–formaldehyde Catalyst
AU  - Hidenori Nishio
AU  - Aya Ohno
AU  - Nobutaka Maeda
AU  - Abbas B. Askari
AU  - Keiichiro Kashimura
AU  - Takeshi Miyata
AU  - Tetsuya Shishido
AU  - Takeyuki Nogami
AU  - Yuga Ezoe
AU  - Yoichi M. A. Yamada
PY  - 2026
DA  - 2026/09/10
PB  - ChemRxiv
DO  - 10.26434/chemrxiv.15008639/v1
UR  - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008639/v1
AB  - Formic acid is a promising renewable C1 feedstock and a safe liquid precursor for on-demand carbon monoxide (CO) production. However, selective dehydration of formic acid to CO remains challenging because solid acid catalysts generally require high temperatures and suffer from competing dehydrogenation and water-induced inhibition of acid sites. Here, we report the selective dehydration of formic acid over a poly(m-phenolsulfonic acid–formaldehyde) (PAFR II) catalyst under microwave irradiation. PAFR II afforded CO in 65% yield at 120 C without detectable formation of hydrogen or carbon dioxide. The catalyst was reused three times while maintaining selective CO formation. PAFR II showed stable catalytic activity during continuousflow dehydration, exhibiting a CO productivity of 31–37 mmol g-1 h-1. This activity was higher than that of previously reported solid acid catalysts operating at or below 150 °C. The resulting CO was directly used for the alkoxycarbonylation of iodobenzene to afford propyl benzoate in 92% yield, demonstrating the practical applicability of this system as an on-demand CO source. Water-addition experiments showed that adsorbed water strongly inhibited dehydration. Microwave electric-field irradiation afforded substantially higher activity than magnetic-field irradiation and conventional heating. Fourier-transform infrared difference spectroscopy and phase-resolved modulation infrared spectroscopy revealed reversible changes in adsorbed water around the sulfonic acid moieties under microwave irradiation. These results suggest that the microwave electric field dynamically modulates the hydration structure around the acid sites, temporarily increasing their accessibility to formic acid.
ER  -