Investigation of Ni–P–B ultrafine amorphous alloy particles produced by chemical reduction

1992 ◽  
Vol 71 (10) ◽  
pp. 5217-5221 ◽  
Author(s):  
Jianyi Shen ◽  
Zheng Hu ◽  
Qinghong Zhang ◽  
Lifeng Zhang ◽  
Yi Chen
Keyword(s):  
Amorphous Alloy ◽  
Chemical Reduction ◽  
Alloy Particles

The preparation of Ni‐P ultrafine amorphous alloy particles by chemical reduction

1991 ◽  
Vol 59 (27) ◽  
pp. 3545-3546 ◽  
Author(s):  
Jianyi Shen ◽  
Zheng Hu ◽  
Lifeng Zhang ◽  
Zhiyu Li ◽  
Yi Chen
Keyword(s):  
Amorphous Alloy ◽  
Chemical Reduction ◽  
Alloy Particles

Preparation and Characterization of Bulk and Supported NiB Amorphous Alloy Catalysts with Different Particle Sizes

2007 ◽  
Vol 121-123 ◽  
pp. 637-640
Author(s):  
Lai Jun Wang ◽  
Wei Li ◽  
M.H. Zhang ◽  
K.Y. Tao
Keyword(s):  
Amorphous Alloy ◽  
Electroless Plating ◽  
Chemical Reduction ◽  
Reaction System ◽  
Catalytic Performance ◽  
Ni Catalyst ◽  
Particle Sizes ◽  
Raney Ni ◽  
Reduction Methods ◽  
Alloy Catalysts

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.

Crystallization and structure of high boron content iron-boron ultrafine amorphous alloy particles

1996 ◽  
Vol 31 (3) ◽  
pp. 611-616 ◽  
Author(s):  
Z. Hu ◽  
Y. Fan ◽  
Y. Wu ◽  
Q. Yan ◽  
Y. Chen
Keyword(s):  
Amorphous Alloy ◽  
Boron Content ◽  
Alloy Particles ◽  
High Boron

Furfural hydrogenation over amorphous alloy catalysts prepared by different reducing agents

BioResources ◽  
2017 ◽  
Vol 12 (4) ◽  
pp. 8755-8774
Author(s):  
Haijun Guo ◽  
Hairong Zhang ◽  
Weichao Tang ◽  
Can Wang ◽  
Chao Huang ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
Active Sites ◽  
Chemical Reduction ◽  
Surface Concentration ◽  
Reducing Agents ◽  
Chemical Reduction Method ◽  
Transfer Capability ◽  
Furfural Hydrogenation ◽  
Adsorption Desorption ◽  
Alloy Catalysts

The catalytic hydrogenation of furfural was studied over a series of Ni-B, Co-B, and Ni-Co-B amorphous alloy catalysts that were prepared by the chemical reduction method using KBH4 and NaBH4 as reducing agents. These catalysts were characterized by N2 adsorption/desorption, XRD, XPS, FE-SEM, and TEM. The results showed that NaBH4 had a much stronger reduction ability to enhance the surface concentration of the metallic active sites for furfural hydrogenation and electron transfer capability, leading to much higher hydrogenation activity. In the Ni-Co-B amorphous alloy catalyst, the equilibrium between the isolated Ni-B/Co-B active sites and the combined Ni-Co-B active sites was important in regulating furfural conversion and products distribution.

Formation of ultra-fine amorphous alloy particles by reduction in aqueous solution

Nature ◽  
1986 ◽  
Vol 322 (6080) ◽  
pp. 622-623 ◽  
Author(s):  
Jacques van Wonterghem ◽  
Steen Mørup ◽  
Christian J. W. Koch ◽  
Stuart W. Charles ◽  
Steven Wells
Keyword(s):  
Aqueous Solution ◽  
Amorphous Alloy ◽  
Alloy Particles

Enhanced Electrochemical Performance of CoB Amorphous Alloy through the Addition of Lanthanum

2018 ◽  
Vol 914 ◽  
pp. 102-108
Author(s):  
Wei Zhao ◽  
Yi Lin Liao ◽  
Shu Jun Qiu ◽  
Hai Liang Chu ◽  
Yong Jin Zou ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
Electrochemical Performance ◽  
Electrochemical Properties ◽  
Discharge Capacity ◽  
Current Density ◽  
Discharge Current ◽  
Electrochemical Impedance ◽  
Chemical Reduction ◽  
High Rate ◽  
Discharge Current Density

In order to investigate the effect of lanthanum on the electrochemical properties of CoB amorphous alloy, Co-Lax-B alloys (x = 0, 0.1, 0.5, and 1) were prepared by chemical reduction method. As negative electrodes in alkaline rechargeable batteries, Co-Lax-B alloys exhibit superior electrochemical properties. For Co-La0.1-B alloy, at the discharge current density of 100 mA/g, the initial discharge capacity is 830.6 mAh/g and the discharge capacity has remained around 317.3 mAh/g even after 100 cycles. Moreover, the high-rate discharge ability (HRD) of Co-La0.1-B alloy electrode at the discharge current density of 300 mA/g, 600 mA/g, and 900 mA/g is 98.16%, 95.17%, and 91.86%, respectively. The anodic polarization (AP) and the electrochemical impedance spectra (EIS) measurements indicate that the kinetics of electrochemical performance of the alloys is remarkably improved with the addition of lanthanum.

ChemInform Abstract: Preparation and Characterization of Ultrafine Amorphous Alloy Particles

ChemInform ◽  
2010 ◽  
Vol 30 (17) ◽  
pp. no-no
Author(s):  
Z. Hu ◽  
Y. Fan ◽  
Y. Chen
Keyword(s):  
Amorphous Alloy ◽  
Alloy Particles

Mesoporous Co–B amorphous alloy films with enhanced catalytic efficiency prepared from a mixed-surfactant solution

2009 ◽  
Vol 24 (11) ◽  
pp. 3300-3307 ◽  
Author(s):  
Hui Li ◽  
Jun Liu ◽  
Haixia Yang ◽  
Hexing Li
Keyword(s):  
Amorphous Alloy ◽  
Photoelectron Spectroscopy ◽  
Active Sites ◽  
Chemical Reduction ◽  
Surfactant Solution ◽  
Mesoporous Structure ◽  
Mixed Surfactant ◽  
Alloy Films ◽  
X Ray ◽  
Electron Micrography

Co–B films were synthesized through the solvent evaporation-assisted chemical reduction method by using a mixed-surfactant solution containing Span 40 and (1S)-(+)-10-camphorsulfonic acid. With the characterization of x-ray diffraction, selected-area electron diffraction, x-ray photoelectron spectroscopy, scanning electron micrography, and transmission electron micrography, the resulting Co–B films were identified to be amorphous alloys with mesoporous structure. The synergistic effect of two kinds of surfactants is essential for the formation of mesoporous structure. During liquid-phase cinnamaldehyde hydrogenation to cinnamyl alcohol, the mesoporous Co–B amorphous alloy films exhibited a much higher activity and better selectivity than the solid Co–B nanoparticles prepared by direct reduction of cobalt ions with borohydride. The enhanced activity is attributed to both the mesoporous and the film structure, which provides more Co active sites for the adsorption and diffusion of reactant molecules. The improved selectivity may be related to the difference in surface curvature.

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