Release time:2021-03-15  Hits:

• Key Words:X ray photoelectron spectroscopy;Activation energy - Aluminum - Atomic emission spectroscopy - Catalyst activity - Catalysts - Deposition - Electroless plating - Gas adsorption - Hydrogen - Hydrogen production - Hydrolysis - Inductively coupled plasma - Molybdenum - Nickel - Nitrogen plasma - Scanning electron microscopy - Sodium - Spectrometers - X ray diffraction - X ray spectrometers;Electroless deposition time - Energy dispersive x-ray spectrometers - Field emission scanning electron microscopes - Inductively Coupled Plasma Atomic Emission Spectrometers - NaBH<inf>4</inf> - Ni-mo-p - Nitrogen adsorption desorption isotherms - Solution temperature
• Abstract:Co-Ni-Mo-P catalysts were synthesized on the &gamma;-Al<inf>2</inf>O<inf>3</inf>by electroless deposition. The as-prepared Co-Ni-Mo-P/&gamma;-Al<inf>2</inf>O<inf>3</inf>catalysts were characterized by inductively coupled plasma atomic emission spectrometer (ICP-AES), field emission scanning electron microscope (SEM), energy dispersive X-ray spectrometer (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption-desorption isotherm. The hydrogen generation activity of Co-Ni-Mo-P/&gamma;-Al<inf>2</inf>O<inf>3</inf>catalysts was tested through hydrolysis of sodium borohydride alkaline solution. The concentrations of Na<inf>2</inf>MoO<inf>4</inf>, NaOH and NaBH<inf>4</inf>, electroless deposition time as well as solution temperature were found to have considerable influences on the hydrogen generation rate of hydrolysis of alkaline NaBH<inf>4</inf>solution. The results show that the obtained Co-Ni-Mo-P/&gamma;-Al<inf>2</inf>O<inf>3</inf>catalysts exhibit excellent catalytic activity. The hydrogen generation rate increases apparently from 10.125 L min^-1g catalyst-1 to 13.842 L min^-1g catalyst-1 with the concentration of Na<inf>2</inf>MoO<inf>4</inf>increasing from 0.5 g L^-1to 0.8 g L^-1at 45 &deg;C. The catalysts also exhibit favorable cycling performance and lower activation energy (52.43 kJ mol^-1) in comparison with that of other reported catalysts. &copy; 2015 Hydrogen Energy Publications, LLC.
• Volume:41
• Issue:3
• Translation or Not:no