Catalytic properties of nickel bis(phosphinite) pincer complexes in the reduction of CO2 to methanol derivatives

Polyhedron ◽  
2012 ◽  
Vol 32 (1) ◽  
pp. 30-34 ◽  
Author(s):  
Sumit Chakraborty ◽  
Yogi J. Patel ◽  
Jeanette A. Krause ◽  
Hairong Guan
Keyword(s):  
Catalytic Properties ◽  
Pincer Complexes ◽  
Reduction Of Co2

scholarly journals Application of POCOP Pincer Nickel Complexes to the Catalytic Hydroboration of Carbon Dioxide

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 508 ◽  
Author(s):  
Jie Zhang ◽  
Jiarui Chang ◽  
Ting Liu ◽  
Bula Cao ◽  
Yazhou Ding ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Room Temperature ◽  
Nickel Complexes ◽  
Active Species ◽  
Pincer Complexes ◽  
Hydride Complex ◽  
Nickel Hydride ◽  
Different Types ◽  
Reduction Of Co2

The reduction of CO2 is of great importance. In this paper, different types of bis(phosphinite) (POCOP) pincer nickel complexes, [2,6-(R2PO)2C6H3]NiX (R = tBu, iPr, Ph; X = SH, N3, NCS), were applied to the catalytic hydroboration of CO2 with catecholborane (HBcat). It was found that pincer complexes with tBu2P or iPr2P phosphine arms are active catalysts for this reaction in which CO2 was successfully reduced to a methanol derivative (CH3OBcat) with a maximum turnover frequency of 1908 h−1 at room temperature under an atmospheric pressure of CO2. However, complexes with phenyl-substituted phosphine arms failed to catalyze this reaction—the catalysts decomposed under the catalytic conditions. Complexes with iPr2P phosphine arms are more active catalysts compared with the corresponding complexes with tBu2P phosphine arms. For complexes with the same phosphine arms, the catalytic activity follows the series of mercapto complex (X = SH) ≈ azido complex (X = N3) >> isothiocyanato complex (X = NCS). It is believed that all of these catalytic active complexes are catalyst precursors which generate the nickel hydride complex [2,6-(R2PO)2C6H3]NiH in situ, and the nickel hydride complex is the active species to catalyze this reaction.

Electrocatalytic Reduction of CO2 with Palladium Bis-N-heterocyclic Carbene Pincer Complexes

2014 ◽  
Vol 53 (24) ◽  
pp. 12962-12972 ◽  
Author(s):  
Jeffrey A. Therrien ◽  
Michael O. Wolf ◽  
Brian O. Patrick
Keyword(s):  
Pincer Complexes ◽  
Electrocatalytic Reduction ◽  
Reduction Of Co2 ◽  
Electrocatalytic Reduction Of Co2

Synthesis, Characterization, and Catalytic Properties of Iridium Pincer Complexes Containing NH Linkers

2017 ◽  
Vol 37 (1) ◽  
pp. 30-39 ◽  
Author(s):  
Reuben B. Leveson-Gower ◽  
Paul B. Webb ◽  
David B. Cordes ◽  
Alexandra M. Z. Slawin ◽  
David M. Smith ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Pincer Complexes ◽  
Iridium Pincer Complexes

Selective Electrocatalytic Reduction of CO2 to Formate by Water-Stable Iridium Dihydride Pincer Complexes

2012 ◽  
Vol 134 (12) ◽  
pp. 5500-5503 ◽  
Author(s):  
Peng Kang ◽  
Chen Cheng ◽  
Zuofeng Chen ◽  
Cynthia K. Schauer ◽  
Thomas J. Meyer ◽  
...  
Keyword(s):  
Pincer Complexes ◽  
Electrocatalytic Reduction ◽  
Reduction Of Co2 ◽  
Electrocatalytic Reduction Of Co2

scholarly journals Facile Synthesis of Mesoporous Silica Nanoparticles and its Electrochemical Conversion of CO2 to Fuels

2020 ◽  
Author(s):  
Najam US Sahar Riyaz ◽  
Karthik Kannan ◽  
Aboubakr M. Abdullah ◽  
Kishor Kumar Sadasivuni
Keyword(s):  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Catalytic Properties ◽  
Mesoporous Silica Nanoparticles ◽  
Simple Procedure ◽  
Metal Nitrate ◽  
Oxide Surface ◽  
Facile Synthesis ◽  
Electrochemical Conversion ◽  
Reduction Of Co2

The increasing amount of CO2 emissions from the industries is proving to have disastrous consequences on the environment. It would be highly beneficial if this CO2 is to be recycled and converted into useful fuel. The aim of this project involves synthesizing a suitable catalyst which can be used for the electrochemical (EC) conversion of CO2 to fuel. The developed catalyst should be mesoporous silica nanoparticles and loaded on to a metal oxide surface. The synthesis involved a relatively simple procedure of forming a homogenous mixture for the nanoparticles, drying the mixture for 2 days then loading on to the metal nitrate. Finally, multiple scans and tests were run on the synthesized sample to characterize its qualities. The results show that the synthesized mesoporous silica nanoparticles have suitable catalytic properties for electrochemical reduction of CO2 to fuel.

Microstructure and reactivity of small metal particles: The role of Ce additives

1992 ◽  
Vol 50 (1) ◽  
pp. 318-319
Author(s):  
L.D. Schmidt ◽  
K. R. Krause ◽  
J. M. Schwartz ◽  
X. Chu
Keyword(s):  
Atmospheric Pressure ◽  
Noble Metals ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Chemical Shifts ◽  
Catalytic Converter ◽  
Structural Evolution ◽  
Single Particles ◽  
Small Metal Particles

The evolution of microstructures of 10- to 100-Å diameter particles of Rh and Pt on SiO2 and Al2O3 following treatment in reducing, oxidizing, and reacting conditions have been characterized by TEM. We are able to transfer particles repeatedly between microscope and a reactor furnace so that the structural evolution of single particles can be examined following treatments in gases at atmospheric pressure. We are especially interested in the role of Ce additives on noble metals such as Pt and Rh. These systems are crucial in the automotive catalytic converter, and rare earths can significantly modify catalytic properties in many reactions. In particular, we are concerned with the oxidation state of Ce and its role in formation of mixed oxides with metals or with the support. For this we employ EELS in TEM, a technique uniquely suited to detect chemical shifts with ∼30Å resolution.

Electron distribution change of small nickel particles encaged in X zeolite in presence of Ce3+ ions, related to their catalytic properties

1986 ◽  
Vol 83 ◽  
pp. 619-621 ◽  
Author(s):  
F. Vergand ◽  
B. Iraqi ◽  
C. Bonnelle ◽  
E. Ramaroson ◽  
M.F. Guilleux ◽  
...  
Keyword(s):  
Electron Distribution ◽  
Catalytic Properties ◽  
Distribution Change ◽  
Nickel Particles ◽  
X Zeolite
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