High Catalytic Activity of Hydrogenation of Ethylene over an Amorphous CeNi&lt;SUB&gt;2&lt;/SUB&gt;H&lt;I&gt;&lt;SUB&gt;x&lt;/SUB&gt;&lt;/I&gt;

Endo, Naruki; Kameoka, Satoshi; Tsai, A.‐P.; Hirata, T.; Nishimura, Chikashi

doi:10.2320/matertrans.maw201105

Cited by 8 publications

(12 citation statements)

References 17 publications

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“…Unique hydrogenation abilities of intermetallic compounds capable of hydrogen storage have also been reported. Endo et al reported that Ni 2 Ce adsorbs hydrogen within its bulk lattice to form an amorphous Ni 2 CeH x phase . This amorphous intermetallic hydride almost completely catalyzes ethylene hydrogenation at low temperatures (conversion: >99%, above 40 °C), while the parent Ni 2 Ce was almost inactive (∼0% at 40 °C).…”

Section: Survey Of Intermetallic Catalystsmentioning

confidence: 87%

“…Endo et al reported that Ni 2 Ce adsorbs hydrogen within its bulk lattice to form an amorphous Ni 2 CeH x phase. 120 This amorphous intermetallic hydride almost completely catalyzes ethylene hydrogenation at low temperatures (conversion: >99%, above 40 °C), while the parent Ni 2 Ce was almost inactive (∼0% at 40 °C). The drastic enhancement in hydrogenation ability was explained by a direct involvement of the adsorbed hydrogen at the surface in ethylene hydrogenation.…”

Section: Survey Of Intermetallic Catalystsmentioning

confidence: 97%

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Intermetallic Compounds: Promising Inorganic Materials for Well-Structured and Electronically Modified Reaction Environments for Efficient Catalysis

2016

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An overview of the catalytic properties of intermetallic compounds has been made to provide a comprehensive understanding regarding (1) what intermetallic catalysts can do, (2) their fundamental roles in enhanced catalysis, and (3) their advantages over other inorganic materials. A number of chemical transformations using intermetallic catalysts have been surveyed and classified into three major divisionshydrogenation/dehydrogenation, oxidation, and steam reforming and various subsections. The fundamental roles of intermetallic phases obtained from this survey were categorized into four types of effects: (a) electronic, (b) geometric, (c) steric, and (d) ordering effects. The unprecedented steric effects governed by the specific surface structures of intermetallic compounds highlight the unique capabilities of intermetallic materials. On the basis of this overview, we have concluded that intermetallic compounds have the following advantages for fine catalyst design: (i) control of the electronic structure, (ii) a specific and ordered atomic-level structure, and (iii) homogeneity of geometric and electronic structures. Thus, intermetallic compounds are promising inorganic catalyst materials capable of creating a well-designed reaction environment and suitable for developing efficient catalytic systems.

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Section: Survey Of Intermetallic Catalystsmentioning

confidence: 87%

Section: Survey Of Intermetallic Catalystsmentioning

confidence: 97%

Intermetallic Compounds: Promising Inorganic Materials for Well-Structured and Electronically Modified Reaction Environments for Efficient Catalysis

2016

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“…Alkene Hydrogenation Reaction: The alloy made of lanthanide and Ni metal also has hydrogen storage capacity, which could endow RE alloy materials with excellent hydrogenation ability. Endo et al [117] synthesized amorphous Ni 2 CeH x from Ni 2 Ce alloy which exhibited excellent hydrogenation ability at low temperature. Amorphous Ni 2 CeH x could completely convert ethylene to ethane at 40°C.…”

Section: Hydrogenation Reactionmentioning

confidence: 99%

“…Endo et al. [ 117 ] synthesized amorphous Ni 2 CeH x from Ni 2 Ce alloy which exhibited excellent hydrogenation ability at low temperature. Amorphous Ni 2 CeH x could completely convert ethylene to ethane at 40°C.…”

Section: Energy Conversionmentioning

confidence: 99%

Rare‐Earth Incorporated Alloy Catalysts: Synthesis, Properties, and Applications

et al. 2021

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and industrial interests in energy conversion processes, such as electrocatalytic and thermocatalytic reactions, the availability of suitable catalysts for target reactions with superior sustainability, selectivity, reactivity, and endurability is the key. [6] Recent studies have suggested that catalysts alloying with RE elements significantly influence their performance in energy conversion and storage. [7] The RE elements with unique electronic configurations of [Xe] 4f n−1 5d 0−1 6s 2 (n = 1-15) give an extra rhythm in tuning their functional properties from the perspective of their electronic and catalytic activities and are significantly promising in increasing the materials' activity and performance stability for a particular system of interest. [8] RE-based alloy catalysts have been ameliorating capabilities from both the RE elements and their alloys, which could pave the way for the industrialization of these alloy catalysts in the near future.Alloying with RE elements gives the alloy richer mechanistic functionalities, electronic structures, activities and spatial arrangements, resulting in well-controlled surface reaction kinetics and better reaction activities. [9] For instance, RE alloys have more stable structures than common transition-metalbased alloy catalyst due to the exceptionally negative alloy formation energies; Pt-RE alloys exhibit the highest activity of all ORR catalysts ever reported; and some RE alloys have low work function due to the anionic electrons contained in the unit cell etc. [7] Chemical synthesis of RE alloys for catalytic To improve the performance of metallic catalysts, alloying provides an efficient methodology to design state-of-the-art materials. As emerging functional materials, rare-earth metal compounds can integrate the unique orbital structure and catalytic behavior of rare earth elements into metallic materials. Such rare-earth containing alloy catalysts proffer an opportunity to tailor electronic properties, tune charged carrier transport, and synergize surface reactivity, which are expected to significantly improve the performance and stability of catalysis. Despite its significance, there are only few reviews on rare earth containing alloys or related topics. This review summarizes the composition, synthesis, and applications of rare earth containing alloys in the field of catalysis. Subsequent to comprehensively summarizing and constructively discussing the existing work, the challenges and possibilities of future research on rare-earth metal compound materials are evaluated.

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“…oxidation behaviour [2] or etching reactions [3]. Logical continuation of these studies is the work of An Pang Tsai and his group on hydrogen absorption on intermetallic compounds [4,5] and high catalytic activity of amorphous intermetallic hydrides in hydrogenation of ethylene and CO2 [6,7]. The subsequent studies were devoted to the influence of real structure of materials (Renee catalyst) or electronic factors on the catalytic activity [8,9].…”

mentioning

confidence: 99%

An-Pang Tsai – a chemist

Grin¹

2021

Acta Cryst Sect A

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High Catalytic Activity of Hydrogenation of Ethylene over an Amorphous CeNi<SUB>2</SUB>H<I><SUB>x</SUB></I>

Cited by 8 publications

References 17 publications

Intermetallic Compounds: Promising Inorganic Materials for Well-Structured and Electronically Modified Reaction Environments for Efficient Catalysis

Intermetallic Compounds: Promising Inorganic Materials for Well-Structured and Electronically Modified Reaction Environments for Efficient Catalysis

Rare‐Earth Incorporated Alloy Catalysts: Synthesis, Properties, and Applications

An-Pang Tsai – a chemist

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