XRD and XPS studies on the ultra-uniform Raney-Ni catalyst prepared from the melt-quenching alloy

A series of bulk and supported NiB amorphous alloy catalysts with different particle sizes were prepared by different chemical reduction methods. By adding a certain volume of NH3 to the reaction system and adjusting the reaction temperature, respectively, the velocity of the reaction between Ni2+ and BH4 - could be controlled and the NiB alloys with particle sizes ranging from 10 to 400nm were obtained. A novel method to prepare the supported NiB catalyst, the powder electroless plating method was also studied. The bulk and supported NiB catalysts were characterized by XRD, ICP and TEM. Hydrogenation of sulfolene was selected as the probe reaction to investigate their catalytic performance. The results revealed that the NiB/MgO prepared by Ag inducing electroless plating showed much higher catalytic activity than Raney Ni catalyst, and the powder electroless plating was a promising method to prepare the supported NiB amorphous alloy catalysts.

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An efficient reduction of unsaturated bonds and halogen-containing groups by nascent hydrogen over Raney Ni catalyst

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2019.121912 ◽

2020 ◽

Vol 389 ◽

pp. 121912 ◽

Cited By ~ 3

Author(s):

Weilai Wang ◽

Junfeng Niu ◽

Zhifeng Yang

Keyword(s):

Ni Catalyst ◽

Efficient Reduction ◽

Raney Ni

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Water as Hydrogen Source for Highly Efficient Conversion of Biomass-Derived Levulinic Acid into γ-Valerolactone over Raney Ni Catalyst

10.26434/chemrxiv.14365583.v1 ◽

2021 ◽

Author(s):

Zhuang Ma ◽

Binbin Jin ◽

Yalin Guo ◽

Xuejun Li ◽

Guodong Yao ◽

...

Keyword(s):

Levulinic Acid ◽

Noble Metals ◽

Large Scale ◽

Precious Metals ◽

Ni Catalyst ◽

Hydrothermal Conditions ◽

Highly Efficient ◽

Operation Process ◽

Raney Ni

Gamma (γ)-valerolactone (GVL) is a promising liquid for energy and carbon-based chemicals. Although many researches regarding the GVL synthesis from carbohydrate biomass, most of them involve the use of noble metals accompanying with the high-purity and high-pressure gaseous hydrogen, existing high cost in large-scale application and safety risk during the transportation and operation process. In this paper, the cheap metal Fe was employed as a reductant for splitting water to produce hydrogen under mild hydrothermal conditions, and commercial Raney Ni was used as a catalyst for in situ hydrogenation of biomass-derived levulinic acid (LA). More than 95% yield of GVL can be attained at 150 oC for 2 h and ~ 90% yield of GVL was also achieved at 100 oC by increasing the reaction time to 5 h. Furthermore, Raney Ni remains the stable catalytic activity after being recycled for 4 times at 150 oC. This work provides a safe and facile process for highly efficient hydrogenation of biomass-derived LA to GVL without precious metals.

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Water as Hydrogen Source for Highly Efficient Conversion of Biomass-Derived Levulinic Acid into γ-Valerolactone over Raney Ni Catalyst

10.26434/chemrxiv.14365583 ◽

2021 ◽

Author(s):

Zhuang Ma ◽

Binbin Jin ◽

Yalin Guo ◽

Xuejun Li ◽

Guodong Yao ◽

...

Keyword(s):

Levulinic Acid ◽

Noble Metals ◽

Large Scale ◽

Precious Metals ◽

Ni Catalyst ◽

Hydrothermal Conditions ◽

Highly Efficient ◽

Operation Process ◽

Raney Ni

Gamma (γ)-valerolactone (GVL) is a promising liquid for energy and carbon-based chemicals. Although many researches regarding the GVL synthesis from carbohydrate biomass, most of them involve the use of noble metals accompanying with the high-purity and high-pressure gaseous hydrogen, existing high cost in large-scale application and safety risk during the transportation and operation process. In this paper, the cheap metal Fe was employed as a reductant for splitting water to produce hydrogen under mild hydrothermal conditions, and commercial Raney Ni was used as a catalyst for in situ hydrogenation of biomass-derived levulinic acid (LA). More than 95% yield of GVL can be attained at 150 oC for 2 h and ~ 90% yield of GVL was also achieved at 100 oC by increasing the reaction time to 5 h. Furthermore, Raney Ni remains the stable catalytic activity after being recycled for 4 times at 150 oC. This work provides a safe and facile process for highly efficient hydrogenation of biomass-derived LA to GVL without precious metals.

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Carbon-Supported Raney Nickel Catalyst for Acetone Hydrogenation with High Selectivity

Molecules ◽

10.3390/molecules25040803 ◽

2020 ◽

Vol 25 (4) ◽

pp. 803

Author(s):

Shuliang Lu ◽

Jiajia Wu ◽

Hui Peng ◽

Yong Chen

Keyword(s):

High Temperature ◽

Green Chemistry ◽

Phenolic Resin ◽

High Selectivity ◽

Ni Catalyst ◽

Al Alloy ◽

Raney Nickel Catalyst ◽

Raney Ni ◽

New Type ◽

Acetone Hydrogenation

Catalysts with high selectivity play key roles in green chemistry. In this work, a granular Raney Ni catalyst using carbon as support (Raney Ni/C) was developed by mixing phenolic resin with Ni-Al alloy, conducting carbonization at high temperature, and leaching with alkaline liquor. The as-prepared Raney Ni/C catalyst is suitable for use in fix-bed reactors. Moreover, it shows high activity and selectivity for catalytic acetone hydrogenation. For instance, at the reaction temperature of 120 °C, the conversion of acetone can reach up to 99.9% and the main byproduct methyl isobutylcarbinol (MIBC) content can be diminished to 0.02 wt%. The Raney Ni/C may represent a new type of shaped Raney metal catalysts, which are important fix-bed catalysts in chemical industry.

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Catalytic Properties of Ni3Al for Hydrogen Production Reactions

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.755 ◽

2005 ◽

Vol 475-479 ◽

pp. 755-758 ◽

Cited By ~ 5

Author(s):

Ya Xu ◽

Satoshi Kameoka ◽

Kyosuke Kishida ◽

Masahiko Demura ◽

An Pong Tsai ◽

...

Keyword(s):

Corrosion Resistance ◽

High Temperature ◽

Hydrogen Production ◽

Catalytic Properties ◽

High Strength ◽

Decomposition Reaction ◽

Methanol Decomposition ◽

Ni Catalyst ◽

Chemical Processing ◽

Raney Ni

Ni3Al has attractive high temperature properties, such as high strength and good oxidation/corrosion resistance, and is possible to be used for high temperature chemical processing and manufacture. Until now, the catalytic properties of Ni3Al were rarely investigated since the leaching of aluminum from Ni3Al is difficult to obtain a porous Raney-Ni compared to NiAl3 and Ni2Al3. In the present work, the catalytic properties of Ni3Al were examined for hydrogen production reactions from methanol. It was found that alkali-leached Ni3Al showed high activity for methanol decomposition (CH3OH→ 2H2+CO). Furthermore, Ni3Al catalysts suppress the formation of methane, i.e. they show higher selectivity for the methanol decomposition reaction than Ni catalyst. These results indicate a possibility for Ni3Al used as a catalyst for hydrogen production reaction.

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