Self-Supported Pt@Ni2P for Controllable Hydrogen Release from Ammonia-Borane Hydrolysis

• Published in: Industrial & engineering chemistry research 2023-07, Vol.62 (28), p.10951-10960
• Main Authors: Asim, Muhammad, Maryam, Bushra, Liu, Xianhua, Pan, Lun, Shi, Chengxiang, Zou, Ji-Jun
• Format: Article
• Language: English
• Subjects: Kinetics, Catalysis, and Reaction Engineering
• ISSN: 0888-5885; 1520-5045
• DOI: 10.1021/acs.iecr.3c01055

The chemical storage of hydrogen is well accomplished by ammonia borane. However, a significant barrier to utilizing ammonia borane practically is developing extraordinarily effective and inexpensive catalysts that propel hydrogen evolution from it. In this work, the catalyst Pt@Ni2P/nickel foam (NF) is synthesized by embedding platinum (Pt) nanoparticles over self-supported Ni2P/NF. Pt@Ni2P/NF enables a high synergetic effect between Pt nanoparticles and Ni2P/NF, boosting the hydrolysis of ammonia borane. The catalyst Pt@Ni2P/NF activity enriches 3.0-fold compared to Ni2P/NF and 25.5-fold compared to pristine Ni2P. X-ray photoelectron spectroscope analysis reveals that embedding Pt nanoparticles over self-supported Ni2P generates a strong interaction between (Ni2P/NF)δ+ and (Pt)δ−. The chemical kinetic results reveal that the activation energy and turnover frequency of Pt@Ni2P/NF are calculated to be 31.0 kJ mol–1 and 63.2 min–1 for 0.13 M AB. This study demonstrates a reliable method used to develop active sites of (Ni2P)δ+ and (Pt)δ− for ammonia-borane hydrolysis. The controllable hydrogen release and facile on/off characteristic of the catalyst demonstrate a feasible way to boost the catalytic performance by constructing a two-dimensional (2D) structure.