Amorphous Ta2O5 supported Ru as efficient electrocatalyst for selective hydrogenation of cinnamaldehyde with water as the hydrogen source

2021 ◽  
Author(s):  
Tianxing Wu ◽  
Hanqi Meng ◽  
Rui Dang
Keyword(s):  
Hydrogen Evolution ◽  
Selective Hydrogenation ◽  
Hydrogen Donor ◽  
Chemical Bonds ◽  
Electrocatalytic Hydrogenation

Electrocatalytic hydrogenation as a competing reaction for hydrogen evolution will occur in the presence of organics containing unsaturated chemical bonds using water as the hydrogen donor. Here, we propose a...

Catalyzed Stereo-selective Hydrogenation of Ynamides to Give Enamines: Ethanol as a Hydrogen Donor

2021 ◽  
pp. 122024
Author(s):  
Fang Yong ◽  
Junxia Yang ◽  
Zhaomin Wei ◽  
Lei Zhang ◽  
Wenli Yuan ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Hydrogen Donor

Visible light-driven selective hydrogenation of unsaturated aromatics in an aqueous solution by direct photocatalysis of Au nanoparticles

2018 ◽  
Vol 8 (3) ◽  
pp. 726-734 ◽  
Author(s):  
Yiming Huang ◽  
Zhe Liu ◽  
Guoping Gao ◽  
Qi Xiao ◽  
Wayde Martens ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Visible Light ◽  
Gold Nanoparticle ◽  
Selective Hydrogenation ◽  
Au Nanoparticles ◽  
Chemical Bonds ◽  
Reaction Conditions ◽  
Visible Light Driven ◽  
Supported Gold

Selective hydrogenation of various chemical bonds, such as CC, CC, CO, NO, and CN, is efficiently driven by visible light over a supported gold nanoparticle (AuNP) photocatalyst under mild reaction conditions.

Preparation of hydrogen donor solvent for asphaltenes efficient liquid-phase conversion via heavy cycle oil selective hydrogenation

Fuel ◽  
2019 ◽  
Vol 257 ◽  
pp. 115886 ◽  
Author(s):  
Dong Fang ◽  
Gang Wang ◽  
Qiang Sheng ◽  
Sida Ge ◽  
Chengdi Gao ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Selective Hydrogenation ◽  
Hydrogen Donor ◽  
Phase Conversion ◽  
Donor Solvent ◽  
Cycle Oil

Electrochemical deposition of Pt on carbon fiber cloth utilizing Pt mesh counter electrode during hydrogen evolution reaction for electrocatalytic hydrogenation reduction of p-nitrophenol

2017 ◽  
Vol 41 (15) ◽  
pp. 7012-7019 ◽  
Author(s):  
Tianxing Wu ◽  
Guozhong Wang ◽  
Yunxia Zhang ◽  
Shenghong Kang ◽  
Haimin Zhang
Keyword(s):  
Carbon Fiber ◽  
Hydrogen Evolution ◽  
Electrochemical Deposition ◽  
Hydrogen Evolution Reaction ◽  
Counter Electrode ◽  
Hydrogenation Reaction ◽  
Electrocatalytic Hydrogenation ◽  
Acidic Media ◽  
Carbon Fiber Cloth

Electrochemically fabricated Pt/CFC by successive CV scanning in acidic media using Pt mesh counter electrode exhibits more favourable hydrogenation reaction activity of PNP to PAP using a CFC counter electrode.

Ryanoids and related compounds — Chemoselective electrocatalytic hydrogenation of alkyl α-pyrrole carboxylates: Selective hydrogenation of ryanodine

2002 ◽  
Vol 80 (12) ◽  
pp. 1662-1667 ◽  
Author(s):  
Luc Ruest ◽  
Hugues Ménard ◽  
Vincent Moreau ◽  
François Laplante
Keyword(s):  
Amino Acid ◽  
Selective Hydrogenation ◽  
Pyrrole Ring ◽  
Biologically Active ◽  
Natural Amino Acid ◽  
Electrocatalytic Hydrogenation ◽  
Biological Interest ◽  
Catalytic Processes ◽  
Related Compounds

A study of the electrocatalytic hydrogenation (ECH) process of pyrrole and different alkyl pyrrole-2-carboxylates is presented. Once hydrogenated, the alkyl pyrrole-2-carboxylate becomes an ester of proline, an important natural amino acid. The process is chemoselective to the pyrrole ring. Ryanodine is a natural ryanoid known to be biologically active. The tetrahydroryanodine derivative thus obtained may now represent a molecule of high biological interest. The hydrogenation of ryanodine is possible with electrocatalytic and catalytic processes. In both cases the reaction is not diastereoselective.Key words: electrocatalytic hydrogenation, proline esters, ryanodine, tetrahydroryanodine.

Chemical Species Identification in an SEM by Changes in Emitted X-Ray Energies

1974 ◽  
Vol 32 ◽  
pp. 570-571
Author(s):  
R. H. Duff
Keyword(s):  
Species Identification ◽  
Valence Electron ◽  
Chemical Species ◽  
X Rays ◽  
Chemical Bonds ◽  
Small Shift ◽  
X Ray ◽  
Electron Transitions ◽  
Peak Energy ◽  
Chemical Combination

A material irradiated with electrons emits x-rays having energies characteristic of the elements present. Chemical combination between elements results in a small shift of the peak energies of these characteristic x-rays because chemical bonds between different elements have different energies. The energy differences of the characteristic x-rays resulting from valence electron transitions can be used to identify the chemical species present and to obtain information about the chemical bond itself. Although these peak-energy shifts have been well known for a number of years, their use for chemical-species identification in small volumes of material was not realized until the development of the electron microprobe.

A highly stable CoMo2S4/Ni3S2 heterojunction electrocatalyst for efficient hydrogen evolution

2021 ◽  
Author(s):  
Minmin Wang ◽  
Mengke Zhang ◽  
Wenwu Song ◽  
Weiting Zhong ◽  
Xunyue Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Current Density ◽  
A Current

A CoMo2S4/Ni3S2 heterojunction is prepared with an overpotential of only 51 mV to drive a current density of 10 mA cm−2 in 1 M KOH solution and ∼100% of the potential remains in the ∼50 h chronopotentiometric curve at 10 mA cm−2.

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