Catalytic Thermal Decomposition of NO2 by Iron(III) Nitrate Nonahydrate-Doped Poly(Vinylidene Difluoride)

Authors

Lasanthi Sumathirathne, University of Rhode Island
Carson Lawrence Hasselbrink, University of Rhode Island
Dugan Hayes, University of Rhode IslandFollow
William B. Euler, University of Rhode IslandFollow

Document Type

Article

Date of Original Version

2022

Department

Chemistry

Abstract

The products of thermal decomposition of iron nitrate nonahydrate doped into poly(vinylidene difluoride) are examined using Mössbauer spectroscopy. Very little of the expected nitrogen dioxide product is observed, which is attributed to Fe³⁺ catalysis of the decomposition of NO₂. The active site of the catalysis is shown to be Fe(OH)₃ in the polymer matrix, which is, unexpectedly, reduced to Fe(OH)₂. Thermodynamic calculations show that the reduction of Fe³⁺ is exergonic at sufficiently high temperatures. A reaction sequence, including a catalytic cycle for decomposition of NO₂, is proposed that accounts for the observed reaction products. The role of the polymer matrix is proposed to inhibit transport of gas-phase products, which allows them to interact with Fe(OH)₃ doped in the polymer.

Publication Title, e.g., Journal

ACS Omega

Volume

7

Issue

48

Citation/Publisher Attribution

Sumathirathne, L., Hasselbrink, C. L., Hayes, D., & Euler, W. B. (2022). Catalytic Thermal Decomposition of NO2 by Iron(III) Nitrate Nonahydrate-Doped Poly(Vinylidene Difluoride). ACS Omega, 7(48), 43839-43846. https://doi.org/10.1021/acsomega.2c04970

Available at: https://doi.org/10.1021/acsomega.2c04970

Creative Commons License

This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.