Towards high activity of hydrogen production from ammonia borane over efficient non-noble Ni5P4 catalyst

Abstract

Catalytic hydrolysis of ammonia borane has tremendous potential as an energy-efficient approach to supply hydrogen for energy vehicles and portable electronic devices. Herein, DFT calculation is first performed on electronic properties of Ni2P and Ni5P4 nanocatalysts. It is found that more electrons are transferred from Ni to P for Ni5P4, indicating that Ni5P4 may show superior performance based on the electron effect. Therefore, Ni2P and Ni5P4 with high purity are synthesized by the phase-controlled thermal decomposition approach. Gratifyingly, the Ni5P4 catalyst exhibits the as-expected better catalytic activity than that of Ni2P catalyst. It also shows low activation energy and good stability. Furthermore, the structures and morphologies of both catalysts are characterized by multi-techniques such as XRD, HRTEM and XPS.The better performance could be ascribed to the higher positive charge of Ni together with the stronger ensemble effect of P. The insights sheds new light on the design of efficient Ni-P catalysts for hydrogen generation.

Superhydrophobic Surface and Lubricant‐Infused Surface: Implementing Two Extremes on Electrodeposited NiTiO2 Surface to Drive Optimal Wettability Regimes for Droplets’ Multifunctional Behaviors

“…The C 1s, Ti 2p, O 1s, and Ni 2p peaks were exhibited in the survey spectrum at 285, 459, 530, and 856 eV, respectively (Figure 4a). [ 30,31 ] Especially, the C1s peak in the survey spectrum is more intense than the other peaks, which significantly implicates the bonding of MA having a highest atomic ratio of 60.34%. Figure 4b shows the high‐resolution spectrum of Ni 2p 3/2 and Ni 2p 1/2 regions, which consist of spin–orbit doublets and shakeup satellite peaks.…”

Organodiphosphonate Metal‐Organic Frameworks Derived Ni‐P@C Catalyst for Hydrogenation of Furfural

“…As a comparison, XRD patterns of Ni−P‐CP precursor and its reduction products under hydrogen atmosphere and different temperatures was researched. As shown in Figure (b), when the calcination temperature was 773 K, Ni−P‐CP precursor resolved into Ni(PO 3 ) 2 and a small amount of Ni 5 P 4 . When the calcination temperature rose to 873 K, Ni(PO 3 ) 2 continued resolving into Ni 5 P 4 , whose diffraction peak intensity was enhanced, and when the calcination temperature rose to 973 K, Ni 2 P was formed.…”

A Simple and Efficient Device and Method for Measuring the Kinetics of Gas‐Producing Reactions

“…(3)] as a benchmark reaction. This simple reaction proceeds to completion within 30 min at ambient temperature in the presence of catalytic Ru/C, giving no side products . Figure compares the cumulative bubble volumes for our device and a control experiment under identical conditions using an upside‐down burette.…”

“…This simple reaction proceeds to completion within 30 min at ambient temperature in the presence of catalytic Ru/C,g iving no side products. [18][19][20] Figure 3c ompares the cumulative bubble volumes for our device and ac ontrol experiment under identical conditions using an upside-down burette.E ach reaction was repeated in triplicate.I nt he control reaction, we measured 100 points,w hich is highly labour-intensive.The automated device measured at the same time no less than 3000 points with high reproducibility.…”