Preparation of Bush-Like Ru/NiO-Ni Foam Catalyst and Its Performance in Hydrogen Production from Sodium Borohydride Alcoholysis

Abstract

A NiO–Ni foam composite carrier was prepared by the hydrothermal method. Ruthenium metal was supported on the NiO–Ni foam by electroplating, obtaining a highly active bush-like Ru/NiO–Ni foam catalyst. To investigate the effect of NiO on the structure and performance of the catalyst, a Ru/Ni foam catalyst was prepared as a reference. The structures of the carrier and both catalysts were characterized by X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy, and the performances of both catalysts were evaluated in alcoholytic hydrogen production from sodium borohydride. On the carrier with the NiO-treated surface, the active component Ru developed a three-dimensional bush-like structure that enhanced the catalytic activity. Indeed, the hydrogen production from alcoholysis of sodium borohydride was three times higher on the Ru/NiO–Ni foam catalyst than on the Ru/Ni foam catalyst, and the highest rate exceeded 6 L/g/min. The repeated-use stability of the Ru/NiO–Ni catalyst (10 times) also exceeded that of Ru/Ni foam (8 times). However, as both catalysts used the same active component (i.e., Ru), their activation energies were almost identical.

A Cu loaded NiFe layered double hydroxide bifunctional electrocatalyst with a coupled interface structure for both the nitrate reduction reaction and oxygen evolution reaction

“…04-0850). 30 Notably, due to Cu nanoclusters loaded on NiFe LDH obstructing the exposure of the related surface crystal plane, the intensity of the surface peak at 2 θ = 22.29° was significantly decreased. In addition, considering that the NF substrate might be easily oxidized into Ni-based hydroxide during the hydrothermal reaction, a comparison sample was synthesised via the same method without adding Ni and Fe sources in step 1.…”

Covalent Organic Framework-Derived Nitrogen-Doped Carbon-Supported Cobalt Oxide Nanoparticles for Synergistic Boosting H2 Evolution from NaBH4

“…Then, 30 mL of deionized water was injected through a rubber plug sealed flask by a syringe. The temperature of the reaction solution was carefully controlled by water bath (6,10,15,20,25,30,35,40,45, and 50 °C).…”

“…Hydrogen storage, transportation, and production are critical for hydrogen industrial applications. − Sodium borohydride (NaBH 4 ) is a kind of high-density hydrogen storage material with nontoxic, nonflammable, and excellent stability in alkaline solution, which can generate high-quality hydrogen with the presence of suitable catalysts. − Highly efficient catalysts are critical to the application of hydrogen generation from catalytic hydrolysis of NaBH 4 solution. , A variety of catalysts including noble metals (e.g., Ru and Pt) and transition metals (e.g., Co and Ni) have been widely studied. − Among these catalysts, inexpensive Co-based materials with high reactivity may be the most promising candidate. , However, few active sites, difficult recovery, lower surface area, and particle agglomeration impede its application. , …”

Advances and Outlook of Boron–Hydrogen Containing Materials for Potential Clean Energy Applications: A Review

“…For a long time, borohydrides have been used as reducing agents in chemical synthesis and solid rocket fuel . With further research, it was found that borohydrides are also a good hydrogen carrier and ionic conductor, and they have been widely used for solid state hydrogen storage, hydrolysis, alcoholysis, and pyrolysis for hydrogen production, fuel cells and several other fields. − For example, Xu et al recently found that doping perovskite solar cells (PSCs) materials with borohydrides can significantly improve their photoelectric conversion efficiency and stability. In addition, some researchers , have found that borohydrides can participate directly in the fuel cell reaction, which makes hydrogen fuel cell vehicles safer and more reliable because it avoids the hydrogen storage step.…”