Surface-Controlled Conversion of Ammonia Borane from Boron Nitride
“One-pot regeneration”, which is simple regneneration method of ammonia borane (AB) using hydrazine and liquid ammonia, enables conversion of AB from hexagonal boron nitride (h-BN) after milling hydrogenation. Solution <sup>11</sup>B-NMR revealed the presence of AB after NH<sub>3&l...
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MDPI AG
2020-10-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/21/5569 |
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| author | Tessui Nakagawa Hiroki Uesato Anthony K. Burrell Takayuki Ichikawa Hiroki Miyaoka Benjamin L. Davis Yoshitsugu Kojima |
| author_facet | Tessui Nakagawa Hiroki Uesato Anthony K. Burrell Takayuki Ichikawa Hiroki Miyaoka Benjamin L. Davis Yoshitsugu Kojima |
| author_sort | Tessui Nakagawa |
| collection | DOAJ |
| description | “One-pot regeneration”, which is simple regneneration method of ammonia borane (AB) using hydrazine and liquid ammonia, enables conversion of AB from hexagonal boron nitride (h-BN) after milling hydrogenation. Solution <sup>11</sup>B-NMR revealed the presence of AB after NH<sub>3</sub>/N<sub>2</sub>H<sub>4</sub> treatment of milled h-BN (BNH<i><sub>x</sub></i>) although the yield of AB was less than 5%. The conversion mechanism was clarified as B-H bonds on the h-BN surface created by ball-milling under hydrogen pressure have an ability to form AB, which was confirmed by Thermogravimetry-Residual Gas Analysis (TG-RGA) and Infrared (IR) analysis. The reaction routes are also the same as regeneration route of polyborazylene because intermediates of AB such as (B(NH<sub>2</sub>)<sub>3</sub> and hydrazine borane were found by solution <sup>11</sup>B-NMR after soaking BNH<i><sub>x</sub></i> in liquid NH<sub>3</sub> and hydrazine, respectively. Because of the fact that all reactions proceed on the h-BN surface and no reaction proceeds when neat h-BN is treated, breaking of B<sub>3</sub>N<sub>3</sub> ring structure and then creation of B-H bond is the key issue to increase conversion yield of AB. |
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| format | Article |
| id | doaj.art-13370488a3c74df68a2f99f6194294f6 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T15:22:22Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-13370488a3c74df68a2f99f6194294f62023-11-20T18:22:07ZengMDPI AGEnergies1996-10732020-10-011321556910.3390/en13215569Surface-Controlled Conversion of Ammonia Borane from Boron NitrideTessui Nakagawa0Hiroki Uesato1Anthony K. Burrell2Takayuki Ichikawa3Hiroki Miyaoka4Benjamin L. Davis5Yoshitsugu Kojima6Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, JapanGraduate School of Engineering and Science, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213, JapanMaterials Physics and Applications Division, Los Alamos National Laboratory, MS J514 Los Alamos National Laboratory, Los Alamos, NM 87575, USAInstitute for Advanced Materials Research, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8530, JapanInstitute for Advanced Materials Research, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8530, JapanMaterials Physics and Applications Division, Los Alamos National Laboratory, MS J514 Los Alamos National Laboratory, Los Alamos, NM 87575, USAInstitute for Advanced Materials Research, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8530, Japan“One-pot regeneration”, which is simple regneneration method of ammonia borane (AB) using hydrazine and liquid ammonia, enables conversion of AB from hexagonal boron nitride (h-BN) after milling hydrogenation. Solution <sup>11</sup>B-NMR revealed the presence of AB after NH<sub>3</sub>/N<sub>2</sub>H<sub>4</sub> treatment of milled h-BN (BNH<i><sub>x</sub></i>) although the yield of AB was less than 5%. The conversion mechanism was clarified as B-H bonds on the h-BN surface created by ball-milling under hydrogen pressure have an ability to form AB, which was confirmed by Thermogravimetry-Residual Gas Analysis (TG-RGA) and Infrared (IR) analysis. The reaction routes are also the same as regeneration route of polyborazylene because intermediates of AB such as (B(NH<sub>2</sub>)<sub>3</sub> and hydrazine borane were found by solution <sup>11</sup>B-NMR after soaking BNH<i><sub>x</sub></i> in liquid NH<sub>3</sub> and hydrazine, respectively. Because of the fact that all reactions proceed on the h-BN surface and no reaction proceeds when neat h-BN is treated, breaking of B<sub>3</sub>N<sub>3</sub> ring structure and then creation of B-H bond is the key issue to increase conversion yield of AB.https://www.mdpi.com/1996-1073/13/21/5569hydrogen storageammonia boraneboron nitridemillingnuclear magnetic resonancehydrogenation |
| spellingShingle | Tessui Nakagawa Hiroki Uesato Anthony K. Burrell Takayuki Ichikawa Hiroki Miyaoka Benjamin L. Davis Yoshitsugu Kojima Surface-Controlled Conversion of Ammonia Borane from Boron Nitride Energies hydrogen storage ammonia borane boron nitride milling nuclear magnetic resonance hydrogenation |
| title | Surface-Controlled Conversion of Ammonia Borane from Boron Nitride |
| title_full | Surface-Controlled Conversion of Ammonia Borane from Boron Nitride |
| title_fullStr | Surface-Controlled Conversion of Ammonia Borane from Boron Nitride |
| title_full_unstemmed | Surface-Controlled Conversion of Ammonia Borane from Boron Nitride |
| title_short | Surface-Controlled Conversion of Ammonia Borane from Boron Nitride |
| title_sort | surface controlled conversion of ammonia borane from boron nitride |
| topic | hydrogen storage ammonia borane boron nitride milling nuclear magnetic resonance hydrogenation |
| url | https://www.mdpi.com/1996-1073/13/21/5569 |
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