Iron Hydride Catalyst
Iron Hydride Catalyst - Related Videos
08:45
Quantitating Iron Transport Across the Mouse Placenta In Vivo Using Nonradioactive Iron Isotopes
0 Views •
Cited by 3 •
2022
This article demonstrates how to prepare and administer transferrin-bound nonradioactive isotopic iron for studies of iron transport in mouse pregnancy. The approach for quantifying isotopic iron in fetoplacental compartments is also described.
11:15
HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin
0 Views •
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
0 Views •
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.
01:17
Esters to Alcohols: Hydride Reductions
0 Views •
2025
Esters are reduced to primary alcohols when treated with a strong reducing agent like lithium aluminum hydride. The reaction requires two equivalents of the reducing agent and proceeds via an aldehyde intermediate. Lithium aluminum hydride is a source of hydride ions and functions as a nucleophile. The mechanism proceeds in three steps. Firstly, the nucleophilic hydride ion attacks the carbonyl carbon of the ester to form a tetrahedral intermediate. Subsequently, the carbonyl group re-forms,...
10:38
Electrochemical Measurements of Supported Catalysts Using a Potentiostat/Galvanostat
0 Views •
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
Reversible hydride transfer allows the iron center to act as a temporary carrier of hydrogen equivalents rather than being consumed in one substrate conversion. After substrate coordination and hydride delivery, the resulting iron species can react with a proton source or hydrogen. This regeneration returns the catalytic cycle to an active state.
Substrate coordination brings the reacting molecule into contact with the iron center, positioning it for hydride transfer or hydrogen transfer. The proton source or hydrogen then has a second role beyond supplying hydrogen: it converts the post-transfer iron species back toward the active hydride. This coupling prevents the catalytic sequence from ending after a single turnover.
Compared with catalysts based on precious metals, iron hydride systems are attractive primarily because iron is relatively abundant and inexpensive. That economic and resource context motivates their study as potentially more sustainable alternatives. The comparison does not imply identical behavior; the relevant question is whether an iron system can support the required hydride-transfer cycle for the intended substrate conversion.
The same iron-hydrogen reactivity can be directed toward different net transformations. Hydrogenation adds hydrogen to a substrate, transfer hydrogenation uses a hydrogen-transfer partner, and dehydrogenation releases hydrogen-related equivalents from the substrate. Thus, reaction classification depends on the direction and source of hydrogen transfer, even when reversible hydride chemistry underlies the catalyst’s activity.
The relevant components are the iron hydride, the substrate, and the source used to restore the catalyst, whether a proton source or hydrogen. A useful reaction scheme follows substrate coordination, hydride or hydrogen transfer, formation of the resulting iron species, and regeneration. Tracking each stage helps connect observed substrate conversion with catalyst turnover.
These systems are relevant to reaction development that seeks alternatives to precious-metal catalysis. Their scope includes hydrogenation, transfer hydrogenation, dehydrogenation, and related bond-forming reactions. Researchers can therefore investigate iron hydrides across transformations that depend on reversible hydrogen transfer while also evaluating their potential contribution to more resource-conscious catalytic approaches.