Chemical preparation and characterization of metal–metalloid ultrafine amorphous alloy particles

Chen, Yi

doi:10.1016/s0920-5861(98)00169-2

Cited by 213 publications

(141 citation statements)

References 44 publications

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“…The following reactions were suggested to form the Co-B alloys [24]: Figure 1A shows XRD patterns of as-prepared Co-B alloys. There is a very broad diffraction peak appearing at 2θ = 45 • -60 • with very minor peaks observed at 43 • , indicating that the main phase is an amorphous structure in nature as reported in [9,19,22].…”

Section: Resultsmentioning

confidence: 99%

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

Qiu

Huang

Chu

et al. 2016

Metals

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Abstract:The Co-B amorphous alloys were prepared via a chemical reduction method by sodium borohydride, using three different cobalt salts (CoCl 2 ·6H 2 O, CoSO 4 ·7H 2 O, and Co(NO 3 ) 2 ·6H 2 O) as sources of cobalt. As anode materials in alkaline rechargeable batteries, the Co-B alloy prepared from CoCl 2 ·6H 2 O has a maximum specific discharge capacity of 844.6 mAh/g, and 306.4 mAh/g is retained even after 100 cycles at a discharge current of 100 mA/g. When Co(NO 3 ) 2 ·6H 2 O is used as a raw material, the formation of Co 3 (BO 3 ) 2 worsens the electrochemical properties of the sample, i.e., a maximum capacity of only 367.0 mAh/g.

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Section: Resultsmentioning

confidence: 99%

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

Qiu

Huang

Chu

et al. 2016

Metals

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“…For a Ni-B amorphous alloy, there is a consensus that B displays a positive binding energy (BE) shift, [56][57][58][59][60] which is interpreted as electron donation from B to Ni [56][57][58][59] or to oxygen species left in the alloy. 21,60 For a Ni-P amorphous alloy, the situation is more complicated. Negative BE shift, 21,56,57,60 no significant BE shift, 61 and compositiondependent BE shift of P 58,59 have been documented.…”

Section: Electronic Propertymentioning

confidence: 99%

Synthesis and catalysis of chemically reduced metal–metalloid amorphous alloys

et al. 2012

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Amorphous alloys structurally deviate from crystalline materials in that they possess unique short-range ordered and long-range disordered atomic arrangement. They are important catalytic materials due to their unique chemical and structural properties including broadly adjustable composition, structural homogeneity, and high concentration of coordinatively unsaturated sites. As chemically reduced metal-metalloid amorphous alloys exhibit excellent catalytic performance in applications such as efficient chemical production, energy conversion, and environmental remediation, there is an intense surge in interest in using them as catalytic materials. This critical review summarizes the progress in the study of the metal-metalloid amorphous alloy catalysts, mainly in recent decades, with special focus on their synthetic strategies and catalytic applications in petrochemical, fine chemical, energy, and environmental relevant reactions. The review is intended to be a valuable resource to researchers interested in these exciting catalytic materials. We concluded the review with some perspectives on the challenges and opportunities about the future developments of metal-metalloid amorphous alloy catalysts.

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“…(5) catalysed by the Pt-Ru-Ni-P nanoparticles formed. Finally, the reaction stops in several hours after the pH value of the solution drops to about 4 [27]. The non-metallic phosphorus with Pt, Ru and Ni deposited simultaneously on the surface of support and the preparation is finished.…”

Section: Original Research Papermentioning

confidence: 99%

Evaluation of the Performance of Carbon Supported Pt–Ru–Ni–P as Anode Catalyst for Methanol Electrooxidation

et al. 2010

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This research is aimed to improve the activity and stability of ternary alloy Pt–Ru–Ni/C catalyst. A novel anodic catalyst for direct methanol fuel cell (DMFC), carbon supported Pt–Ru–Ni–P nanoparticles, has been prepared by chemical reduction method by using NaH2PO2 as a reducing agent. One glassy carbon disc working electrode is used to test the catalytic performances of the homemade catalysts by cyclic voltammetric (CV), chronoamperometric (CA) and amperometric i–t measurements in a solution of 0.5 mol L–1 H2SO4 and 0.5 mol L–1 CH3OH. The compositions, particle sizes and morphology of home‐made catalysts are evaluated by means of energy dispersive analysis of X‐ray (EDAX), X‐ray diffraction (XRD) and transmission electron micrographs (TEM), respectively. TEM images show that Pt–Ru–Ni–P nanoparticles have an even size distribution with an average diameter of less than 2 nm. The results of CV, CA and i–t curves indicate that the Pt–Ru–Ni–P/C catalyst shows significantly higher activity and stability for methanol electrooxidation due to the presence of non‐metal phosphorus in comparison to Pt–Ru–Ni/C one. All experimental results indicate that the addition of non‐metallic phosphorus into the Pt–Ru–Ni/C catalyst has definite value of research and practical application for enhancing the performance of DMFC.

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Chemical preparation and characterization of metal–metalloid ultrafine amorphous alloy particles

Cited by 213 publications

References 44 publications

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

Synthesis and catalysis of chemically reduced metal–metalloid amorphous alloys

Evaluation of the Performance of Carbon Supported Pt–Ru–Ni–P as Anode Catalyst for Methanol Electrooxidation

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