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

Thechemical storage of hydrogen is well accomplished by ammoniaborane. However, a significant barrier to utilizing ammonia boranepractically is developing extraordinarily effective and inexpensivecatalysts that propel hydrogen evolution from it. In this work, thecatalyst Pt@Ni2P/nickel foam (NF) is synthesized by embeddingplatinum (Pt) nanoparticles over self-supported Ni2P/NF.Pt@Ni2P/NF enables a high synergetic effect between Ptnanoparticles and Ni2P/NF, boosting the hydrolysis of ammoniaborane. The catalyst Pt@Ni2P/NF activity enriches 3.0-foldcompared to Ni2P/NF and 25.5-fold compared to pristineNi(2)P. X-ray photoelectron spectroscope analysis revealsthat embedding Pt nanoparticles over self-supported Ni2P generates a strong interaction between (Ni2P/NF)(& delta;+) and (Pt)(& delta;-). The chemical kineticresults reveal that the activation energy and turnover frequency ofPt@Ni2P/NF are calculated to be 31.0 kJ mol(-1) and 63.2 min(-1) for 0.13 M AB. This study demonstratesa reliable method used to develop active sites of (Ni2P)(& delta;+) and (Pt)(& delta;-) for ammonia-boranehydrolysis. The controllable hydrogen release and facile on/off characteristicof the catalyst demonstrate a feasible way to boost the catalyticperformance by constructing a two-dimensional (2D) structure.