Surface-Controlled Conversion of Ammonia Borane from Boron Nitride

資料種別:
論文(リポジトリ)
責任表示:
Nakagawa, Tessui ; Uesato, Hiroki ; Burrell, Anthony K. ; Ichikawa, Takayuki ; Miyaoka, Hiroki ; Davis, Benjamin L. ; Kojima, Yoshitsugu
言語:
英語
出版情報:
MDPI, 2020-10-23
著者名:
Nakagawa, Tessui
Uesato, Hiroki
Burrell, Anthony K.
Ichikawa, Takayuki
Miyaoka, Hiroki
Davis, Benjamin L.
Kojima, Yoshitsugu
続きを見る
掲載情報:
Energies
ISSN:
1996-1073  CiNii Articles  Webcat Plus  JAIRO
巻:
13
通号:
21
バージョン:
publisher
概要:
“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 ^<11>B-NMR revealed the presence of AB after NH_3/N_2H_4 treatment of milled h-BN (BNH_x) 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_2)_3 and hydrazine borane were found by solution ^<11>B-NMR after soaking BNH_x in liquid NH_3 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_3N_3 ring structure and then creation of B-H bond is the key issue to increase conversion yield of AB. 続きを見る
URL:
http://hdl.handle.net/20.500.12000/47495
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