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Facet effect of Co3O4 nanocatalysts on the catalytic decomposition of ammonium perchlorate
- Source :
- Journal of Hazardous Materials. 392:122358
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Crystal facets can affect the catalytic decomposition of ammonium perchlorate, but the underlying mechanisms have long remained unclear. Here, we use the nanorods, nanosheets and nanocubes of Co3O4 catalysts exposing {110}, {111} and {100} facets as model systems to investigate facet effects on catalytic AP decomposition. The peak temperature of high temperature decomposition (HTD) process (THTD) of AP by nanorods, nanosheets and nanocubes Co3O4 decrease from 437.0 °C to 289.4 °C, 299.9 °C and 326.3 °C, respectively, showing obvious facet effects. We design experiments about AP decomposition under different atmospheres to investigate its mechanism and verify that the accumulation of ammonia (NH3) on AP surface can inhibit its decomposition and that the facet effects are related to the adsorption and oxidation of NH3. The binding energies of NH3 on the {110}, {111} and {100} planes calculated via density functional theory (DFT) are -1.774 eV, -1.638 eV, and -1.354 eV, respectively, indicating that the {110} planes are more favorable for the adsorption of NH3. Moreover, the {110} planes are readily to form Co N O structure, which benefits the further oxidation of the NH3.
- Subjects :
- 021110 strategic, defence & security studies
Environmental Engineering
Materials science
Health, Toxicology and Mutagenesis
0211 other engineering and technologies
02 engineering and technology
010501 environmental sciences
Ammonium perchlorate
01 natural sciences
Pollution
Decomposition
Nanomaterial-based catalyst
Catalysis
Crystal
chemistry.chemical_compound
Crystallography
Adsorption
chemistry
Environmental Chemistry
Density functional theory
Nanorod
Waste Management and Disposal
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 03043894
- Volume :
- 392
- Database :
- OpenAIRE
- Journal :
- Journal of Hazardous Materials
- Accession number :
- edsair.doi...........c7e1405b44421ceef3f6ae34a0a75c1d