Nickel Catalyst
Nickel Catalyst - Related Videos
08:13
Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
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Cited by 8 •
2018
A protocol for the synthesis of sponge-like and fold-like Ni1-xNbxO nanoparticles by chemical precipitation is presented.
08:40
Gyroid Nickel Nanostructures from Diblock Copolymer Supramolecules
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Cited by 3 •
2014
This article describes the preparation of well-ordered nickel nanofoams via electroless metal deposition onto nanoporous templates obtained from self-assembled diblock copolymer based supramolecules.
11:15
HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin
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Cited by 12 •
2016
The conversion of trans-ferulic acid to vanillin was achieved by heterogeneous catalysis. HKUST-1 was employed in this synthesis and the essential step in the catalytic process was the generation of unsaturated metal sites. Thus, when the catalyst was activated under vacuum, full vanillin conversion (yield of 95%) was obtained.
09:53
Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture
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Cited by 3 •
2018
Here we present a protocol to measure the modulus of rupture of an extruded catalyst and the breakage of said catalyst extrudates by collision against a surface or by compression in a fixed bed.
10:38
Electrochemical Measurements of Supported Catalysts Using a Potentiostat/Galvanostat
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2023
Source: Laboratory of Dr. Yuriy Román — Massachusetts Institute of Technology A potentiostat/galvanostat (often referred to as simply a potentiostat) is an instrument that measures current at an applied potential (potentiostatic operation) or measures potential at an applied current (galvanostatic operation) (Figure 1). It is the most commonly used instrument in the electrochemical characterization of anode and cathode materials for fuel cells, electrolyzers, batteries, and supercapacitors.
FAQs
Nickel can change oxidation state as it moves through a catalytic cycle, allowing it to activate chemical bonds and coordinate reactants. These changes support key transformations such as oxidative addition and reductive elimination. Because the catalyst is regenerated after product release, the same nickel species can participate repeatedly rather than being consumed in a single reaction.
These steps describe distinct stages in nickel-mediated bond construction. Oxidative addition activates a stable bond, migratory insertion reorganizes groups coordinated to nickel, transmetalation transfers a group to the nickel center, and reductive elimination releases the product while helping regenerate the catalyst. Together, they provide a mechanistic framework for understanding bond-forming reactions.
Nickel coordinates reactants and uses changes in its oxidation state to create a pathway for bond activation and transformation. This coordination can make otherwise difficult chemical changes accessible within a catalytic cycle. The resulting reactivity enables nickel to participate in hydrogenation, cross-coupling, polymerization, and other reactions that form or reorganize chemical bonds.
Nickel offers reactivity that differs from precious-metal catalysts while generally providing a lower-cost alternative. This combination makes it useful when researchers need a catalyst capable of specific bond transformations without relying exclusively on precious metals. The comparison is especially relevant to synthetic chemistry, materials production, pharmaceutical development, and efforts toward more sustainable catalytic processes.
A useful analysis follows the catalytic cycle from reactant coordination through bond activation, intermediate transformations, product-forming steps, and catalyst regeneration. Researchers can identify where oxidative addition, migratory insertion, transmetalation, or reductive elimination occurs. Mapping these stages helps connect the observed chemical transformation with the nickel species and oxidation-state changes proposed for the reaction.
Nickel catalysts support several important reaction classes, including hydrogenation, carbon-carbon cross-coupling, carbon-heteroatom cross-coupling, and alkene polymerization. These applications reflect the ability of nickel to participate in different bond-forming and bond-transforming pathways. Selecting among these reaction classes depends on the chemical transformation being investigated and the desired product or material.
Applications extend across laboratory and industrial chemistry, including synthetic chemistry, materials production, and pharmaceutical development. Nickel-catalyzed transformations also support research into more sustainable catalytic processes because nickel can provide useful reactivity at lower cost than precious-metal alternatives. In each setting, the catalytic cycle connects molecular bond changes with the production of valuable compounds or materials.