Carbon-doped boron nitride nanosheet as a promising metal-free catalyst for NO reduction: DFT mechanistic study
© 2018 Elsevier B.V. Currently, metal-based catalysts are commonly used to convert highly toxic gases like NO molecules into less toxic gases, such as N2O molecules through the process of reduction reaction that has a low activation energy (Ea) and high efficiency. Due to the high cost, environmenta...
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| Main Authors: | , , , |
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| Format: | Journal |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85044101397&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/58396 |
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| Institution: | Chiang Mai University |
| Summary: | © 2018 Elsevier B.V. Currently, metal-based catalysts are commonly used to convert highly toxic gases like NO molecules into less toxic gases, such as N2O molecules through the process of reduction reaction that has a low activation energy (Ea) and high efficiency. Due to the high cost, environmental hazards and limited supply of metal-based catalysts, development of metal-free catalysts that are low cost and environmentally friendly has increased. For this research, NO reduction mechanism using the carbon-doped boron nitride nanosheets (CBNs) as a metal-free catalyst was investigated by density functional theory (DFT). For the NO reduction mechanism, the dimer mechanism pathway was investigated using the following equation: 2NO → N2O + Oad. In addition, the catalytic activity of carbon atom substitution onto BNs for NO reduction was studied. The results showed that the trans-(NO)2structure of CNBNs (D5) is a potentially crucial intermediate with thermodynamically and kinetically favorable, in which the calculated rate-determining step along the most energetically favorable pathway is 0.62 eV. Hence, our results presented here suggest that CNBNs can be a highly active metal-free material in NO removal, which will reduce NO into environmentally friendly gases. |
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