Preparation and catalysis of amorphous CoNiB and polymer-stabilized CoNiB catalysts for hydrogenation of unsaturated aldehydes

Liaw, Biing‐Jye; Chiang, Shu‐Jen; Chen, Shih-Wen; Chen, Yin‐Zu

doi:10.1016/j.apcata.2008.05.025

Cited by 56 publications

(45 citation statements)

References 25 publications

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“…The particle size and distribution of PVP-Ni-B were decreased and View Article Online narrowed to 3-5 nm under optimal preparation conditions, which was about one-tenth of that of Ni-B without PVP protection. 94 Moreover, PVP-Ni-B was more stable than conventional Ni-B at temperatures above 573 K, despite the much smaller particle size of the former. Similar results were observed on the PVP-Co-Ni-B catalyst.…”

Section: Polymer Stabilizationmentioning

confidence: 99%

“…100,101 Liaw and coworkers used water-soluble polyvinylpyrrolidone (PVP) as a capping agent to prepare the PVP-stabilized Ni-B and Co-Ni-B catalysts. 92,94 The molecular weight of PVP and the PVP/metal ratio in the salt solution affected the particle size and distribution of the nanoparticles. The particle size and distribution of PVP-Ni-B were decreased and View Article Online narrowed to 3-5 nm under optimal preparation conditions, which was about one-tenth of that of Ni-B without PVP protection.…”

Section: Polymer Stabilizationmentioning

confidence: 99%

“…The vigorous and exothermic reduction reaction may induce severe agglomeration or aggregation of the nanoparticles, thereby lowering the catalytic efficiency. To remove the disadvantage of conventional chemical reduction methods, various preparative strategies to uniform amorphous alloy nanoparticles have been developed, including the microemulsion method, 53,90,91 polymer stabilization, [92][93][94] and sonochemical technique. [95][96][97][98][99] 3.1.1 Microemulsion method.…”

Section: Monodispersed Nanoparticlesmentioning

confidence: 99%

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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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Section: Polymer Stabilizationmentioning

confidence: 99%

Section: Polymer Stabilizationmentioning

confidence: 99%

Section: Monodispersed Nanoparticlesmentioning

confidence: 99%

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Synthesis and catalysis of chemically reduced metal–metalloid amorphous alloys

et al. 2012

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“…Nanoscale amorphous materials are important noncrystalline solids and are new type of advanced materials [18][19][20][21][22][23][24][25][26][27][28][29][30]. They have larger specific surface area than their bulk counterparts and therefore can show better performance and be applicable in more fields.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the shape of amorphous nanomaterials: recent developments and applications

2015

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Nanoscale amorphous materials are very important member of the non-crystalline solids family and have emerged as a new category of advanced materials. However, morphological control of amorphous nanomaterials is very difficult because of the atomic isotropy of their internal structures. In this review, we introduce some emerging innovative methods to fabricate well-defined, regular-shaped amorphous nanomaterials. We then highlight some examples to evaluate the use of these amorphous materials in electrodes, and their optical response. There is still plenty of room to explore the amorphous world. As researchers continue to advance the scientific tools that underpin the concepts related to "amorphous", additional applications of these materials will emerge. Their controlled synthesis will undoubtedly attain new heights in the discipline of nanomaterials, and allow nanoscale amorphous materials to become more sophisticated, diverse, and mainstream.

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“…Ni-B, as an amorphous alloy catalyst, was used for the hydrogenation of benzene, cyclopentadiene, and acrylonitrile [17,18]. In addition, nickel-based catalysts were also well known for catalytic hydrolysis of metal borohydride owing to its excellent catalytic activity [19,20].…”

Section: Introductionmentioning

confidence: 99%

Ni–B-doped NaAlH4 hydrogen storage materials prepared by a facile two-step synthesis method

Ren

et al. 2013

Rare Met.

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By directly introducing Ni-B into NaAlH 4 system using a facile two-step synthesis method, the effects of Ni-B on NaAlH 4 were systematically investigated. NaAlH 4 can be completely formed after 30 h milling under 1 MPa hydrogen pressure. In addition, the dehydrogenation kinetics of as-prepared NaAlH 4 after different milling times were investigated. As the dehydrogenation temperature rises, both the hydrogen desorption capacity and dehydrogenation rate quickly increase. The apparent activation energy E a for Ni-B-doped NaAlH 4 is calculated to be 61.91 kJÁmol -1 for the first dehydrogenation step. More importantly, the dehydrogenation temperature of as-prepared NaAlH 4 nanocrystalline can be reduced to about 100°C.

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Preparation and catalysis of amorphous CoNiB and polymer-stabilized CoNiB catalysts for hydrogenation of unsaturated aldehydes

Cited by 56 publications

References 25 publications

Synthesis and catalysis of chemically reduced metal–metalloid amorphous alloys

Synthesis and catalysis of chemically reduced metal–metalloid amorphous alloys

Tailoring the shape of amorphous nanomaterials: recent developments and applications

Ni–B-doped NaAlH4 hydrogen storage materials prepared by a facile two-step synthesis method

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