The Effect of Storage-Induced Changes in Ammonia Borane on Hydrogen Release during Its Low-Temperature Thermolysis
In this paper, low-temperature solid-state processes of the dehydrogenation of ammonia borane (NH<sub>3</sub>BH<sub>3</sub>, AB) samples of different purity are compared under the conditions of isothermal heating at 100 °C, as well as in the course of thermal analysi...
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| Format: | Article |
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MDPI AG
2019-08-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/7/8/96 |
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| author | Oxana V. Komova Olga V. Netskina Anna M. Ozerova Galina V. Odegova Sergei S. Arzumanov Valentina I. Simagina |
| author_facet | Oxana V. Komova Olga V. Netskina Anna M. Ozerova Galina V. Odegova Sergei S. Arzumanov Valentina I. Simagina |
| author_sort | Oxana V. Komova |
| collection | DOAJ |
| description | In this paper, low-temperature solid-state processes of the dehydrogenation of ammonia borane (NH<sub>3</sub>BH<sub>3</sub>, AB) samples of different purity are compared under the conditions of isothermal heating at 100 °C, as well as in the course of thermal analysis which was also carried out at different rates of heating. The composition of boron-containing impurities was studied by attenuated total reflection Fourier transform infrared spectroscopy (ATR FTIR) and <sup>11</sup>B magic angle spinning nuclear magnetic resonance (<sup>11</sup>B MAS NMR). Accumulation in AB of three- and four-coordinated borate anions upon contact of hydride with air moisture is established. The apparent activation energies were calculated from thermal analysis data, and found to decrease from 174 to 163 kJ/mol as the AB purity decreased from 93% to 79%. This showed itself in a shortening of the induction period during the AB thermolysis under isothermal conditions. The prospects of using the thermal analysis for estimating NH<sub>3</sub>BH<sub>3</sub> reactivity are discussed. |
| first_indexed | 2024-12-21T14:16:51Z |
| format | Article |
| id | doaj.art-6332ef361f904c8688d81d38fa910c71 |
| institution | Directory Open Access Journal |
| issn | 2304-6740 |
| language | English |
| last_indexed | 2024-12-21T14:16:51Z |
| publishDate | 2019-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Inorganics |
| spelling | doaj.art-6332ef361f904c8688d81d38fa910c712022-12-21T19:00:54ZengMDPI AGInorganics2304-67402019-08-01789610.3390/inorganics7080096inorganics7080096The Effect of Storage-Induced Changes in Ammonia Borane on Hydrogen Release during Its Low-Temperature ThermolysisOxana V. Komova0Olga V. Netskina1Anna M. Ozerova2Galina V. Odegova3Sergei S. Arzumanov4Valentina I. Simagina5Boreskov Institute of Catalysis SB RAS (BIC SB RAS), 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS (BIC SB RAS), 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS (BIC SB RAS), 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS (BIC SB RAS), 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS (BIC SB RAS), 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS (BIC SB RAS), 630090 Novosibirsk, RussiaIn this paper, low-temperature solid-state processes of the dehydrogenation of ammonia borane (NH<sub>3</sub>BH<sub>3</sub>, AB) samples of different purity are compared under the conditions of isothermal heating at 100 °C, as well as in the course of thermal analysis which was also carried out at different rates of heating. The composition of boron-containing impurities was studied by attenuated total reflection Fourier transform infrared spectroscopy (ATR FTIR) and <sup>11</sup>B magic angle spinning nuclear magnetic resonance (<sup>11</sup>B MAS NMR). Accumulation in AB of three- and four-coordinated borate anions upon contact of hydride with air moisture is established. The apparent activation energies were calculated from thermal analysis data, and found to decrease from 174 to 163 kJ/mol as the AB purity decreased from 93% to 79%. This showed itself in a shortening of the induction period during the AB thermolysis under isothermal conditions. The prospects of using the thermal analysis for estimating NH<sub>3</sub>BH<sub>3</sub> reactivity are discussed.https://www.mdpi.com/2304-6740/7/8/96hydrogen storageammonia boranepurityboratesthermolysisKissinger equationactivation energy |
| spellingShingle | Oxana V. Komova Olga V. Netskina Anna M. Ozerova Galina V. Odegova Sergei S. Arzumanov Valentina I. Simagina The Effect of Storage-Induced Changes in Ammonia Borane on Hydrogen Release during Its Low-Temperature Thermolysis Inorganics hydrogen storage ammonia borane purity borates thermolysis Kissinger equation activation energy |
| title | The Effect of Storage-Induced Changes in Ammonia Borane on Hydrogen Release during Its Low-Temperature Thermolysis |
| title_full | The Effect of Storage-Induced Changes in Ammonia Borane on Hydrogen Release during Its Low-Temperature Thermolysis |
| title_fullStr | The Effect of Storage-Induced Changes in Ammonia Borane on Hydrogen Release during Its Low-Temperature Thermolysis |
| title_full_unstemmed | The Effect of Storage-Induced Changes in Ammonia Borane on Hydrogen Release during Its Low-Temperature Thermolysis |
| title_short | The Effect of Storage-Induced Changes in Ammonia Borane on Hydrogen Release during Its Low-Temperature Thermolysis |
| title_sort | effect of storage induced changes in ammonia borane on hydrogen release during its low temperature thermolysis |
| topic | hydrogen storage ammonia borane purity borates thermolysis Kissinger equation activation energy |
| url | https://www.mdpi.com/2304-6740/7/8/96 |
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