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 Fe catalysis of the decomposition of NO. The active site of the catalysis is shown to be Fe(OH) in the polymer matrix, which is, unexpectedly, reduced to Fe(OH). Thermodynamic calculations show that the reduction of Fe is exergonic at sufficiently high temperatures. A reaction sequence, including a catalytic cycle for decomposition of NO, 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) doped in the polymer.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9730309PMC
http://dx.doi.org/10.1021/acsomega.2c04970DOI Listing

Publication Analysis

Top Keywords

thermal decomposition
8
polyvinylidene difluoride
8
polymer matrix
8
catalytic thermal
4
decomposition
4
decomposition ironiii
4
ironiii nitrate
4
nitrate nonahydrate-doped
4
nonahydrate-doped polyvinylidene
4
difluoride products
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!