Nanostructured Ni2P as a Robust Catalyst for the Hydrolytic Dehydrogenation of Ammonia–Borane. (5th November 2015)

• Record Type: Journal Article
• Authors: Peng, Cheng‐Yun; Kang, Lei; Cao, Shuang; Chen, Yong; Lin, Zhe‐Shuai; Fu, Wen‐Fu
• Is Part Of: Angewandte Chemie. Volume 127:Number 52(2015)
• Page Start: 15951
• Page End: 15955
• Publication Date: 2015-11-05
• Subjects: Amminboran -- Heterogene Katalyse -- Nickelphosphid -- Reaktionsmechanismen -- Wasserstoffspeicherung; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201508113
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Ammonia–borane (AB) is a promising chemical hydrogen‐storage material. However, the development of real‐time, efficient, controllable, and safe methods for hydrogen release under mild conditions is a challenge in the large‐scale use of hydrogen as a long‐term solution for future energy security. A new class of low‐cost catalytic system is presented that uses nanostructured Ni2 P as catalyst, which exhibits excellent catalytic activity and high sustainability toward hydrolysis of ammonia–borane with the initial turnover frequency of 40.4 mol(H2) mol(Ni2P) −1 min −1 under air atmosphere and at ambient temperature. This value is higher than those reported for noble‐metal‐free catalysts, and the obtained Arrhenius activation energy ( E a =44.6 kJ mol −1 ) for the hydrolysis reaction is comparable to Ru‐based bimetallic catalysts. A clearly mechanistic analysis of the hydrolytic reaction of AB based on experimental results and a density functional theory calculation is presented. Abstract : Ein preiswertes Katalysatorsystem, bei dem nanostrukturiertes Ni2 P als Katalysator eingesetzt wird, ist für die Hydrolyse von Amminboran geeignet. Das System ist durch eine ausgezeichnete katalytische Aktivität und hohe Nachhaltigkeit an Luft und bei Umgebungstemperatur gekennzeichnet.