Fe, Ru, and Os complexes with the same molecular framework: comparison of structures, properties and catalytic activities

2017 ◽  
Vol 198 ◽  
pp. 181-196 ◽  
Author(s):  
Masaki Yoshida ◽  
Mio Kondo ◽  
Masaya Okamura ◽  
Mari Kanaike ◽  
Setsiri Haesuwannakij ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Complexes ◽  
Electrochemical Properties ◽  
Water Oxidation ◽  
Monodentate Ligand ◽  
Catalytic Activities ◽  
Molecular Framework

A series of group 8 metal complexes with the same molecular framework, [M(PY5Me2)L]n+ (M = Fe, Ru, and Os; PY5Me2 = 2,6-bis[1,1-bis(2-pyridyl)ethyl]pyridine; L = monodentate ligand), were successfully synthesized and structurally characterized. The spectroscopic and electrochemical properties as well as the catalytic activity for water oxidation of these complexes were investigated.

Heterometallic rare-earth metal complexes with imino-functionalized 8-hydroxyquinolyl ligands: synthesis, characterization and catalytic activity towards hydrophosphinylation of trans-β-nitroalkene

2015 ◽  
Vol 39 (10) ◽  
pp. 7626-7632 ◽  
Author(s):  
Qingbing Yuan ◽  
Shuangliu Zhou ◽  
Xiancui Zhu ◽  
Yun Wei ◽  
Shaowu Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Metal Complexes ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Catalytic Activities ◽  
Heterobimetallic Complexes ◽  
Rare Earth Metal Complexes

The heterobimetallic complexes exhibited high catalytic activities on the hydrophosphinylation of β-nitroalkenes.

A highly efficient electrocatalyst based on double perovskite cobaltites with immense intrinsic catalytic activity for water oxidation

2020 ◽  
Vol 56 (7) ◽  
pp. 1030-1033 ◽  
Author(s):  
Håkon Andersen ◽  
Kaiqi Xu ◽  
Dmitry Malyshkin ◽  
Ragnar Strandbakke ◽  
Athanasios Chatzitakis
Keyword(s):  
Catalytic Activity ◽  
Water Oxidation ◽  
Double Perovskite ◽  
Catalytic Activities ◽  
Highly Efficient

OER electrocatalysts based on double perovskite cobaltites (Ln = Gd or Pr) with intrinsic catalytic activities exceeding that of IrO2.

Crystal Structure Studies towards the Synthesis and Applications of N-heterocyclic Carbene–Metal Complexes Derived from [2.2]Paracyclophane

2015 ◽  
Vol 68 (10) ◽  
pp. 1472 ◽  
Author(s):  
Wenzeng Duan ◽  
Yudao Ma ◽  
Yanmin Huo ◽  
Qingxia Yao
Keyword(s):  
Crystal Structure ◽  
Catalytic Activity ◽  
Metal Complexes ◽  
Single Crystal ◽  
Crystal Structures ◽  
Phenylboronic Acid ◽  
High Catalytic Activity ◽  
The Novel ◽  
Asymmetric Addition ◽  
Catalytic Activities

The crystal structures of six planar chiral N-heterocyclic carbene (NHC) precursors and one NHC–Rh complex derived from [2.2]paracyclophane were described. The NHC–metal complexes were prepared to examine their catalytic activities toward the Rh-catalyzed asymmetric addition of phenylboronic acid to 1-naphthaldehyde. The results were correlated to the single-crystal crystallographic studies. The novel NHC precursor 5 can achieve high catalytic activity in the asymmetric addition of phenylboronic acid to 1-naphthaldehyde.

Revisiting Dinuclear Ruthenium Water Oxidation Catalysts: Effect of Bridging Ligand Architecture on Catalytic Activity

2021 ◽  
Vol 60 (3) ◽  
pp. 1806-1813
Author(s):  
Husain N. Kagalwala ◽  
Mahesh S. Deshmukh ◽  
Elamparuthi Ramasamy ◽  
Neelima Nair ◽  
Rongwei Zhou ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Water Oxidation ◽  
Oxidation Catalysts ◽  
Bridging Ligand ◽  
Dinuclear Ruthenium

scholarly journals Development of palladium catalysts modified by ruthenium and molybdenum as anode in direct ethanol fuel cell

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Yonis Fornazier Filho ◽  
Ana Caroliny Carvalho da Cruz ◽  
Rolando Pedicini ◽  
José Ricardo Cezar Salgado ◽  
Priscilla Paiva Luz ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Palladium Catalysts ◽  
Carbon Support ◽  
X Ray Diffraction ◽  
Direct Ethanol Fuel Cell ◽  
Pd Catalysts ◽  
Bifunctional Mechanism ◽  
Catalytic Activities ◽  
Intrinsic Mechanism ◽  
Ternary Catalysts

AbstractPhysical and electrochemical properties of Pd catalysts combined with Ru and Mo on carbon support were investigated. To this end, Pd, Pd1.3Ru1.0, Pd3.2Ru1.3Mo1.0 and Pd1.5Ru0.8Mo1.0 were synthesized on Carbon Vulcan XC72 support by the method of thermal decomposition of polymeric precursors and then physically and electrochemically characterized. The highest reaction yields are obtained for Pd3.2Ru1.3Mo1.0/C and Pd1.5Ru0.8Mo1.0/C and, as demonstrated by thermal analysis, they also show the smallest metal/carbon ratio compared the other catalysts. XRD (X-ray Diffraction) and Raman analyses show the presence of PdO and RuO2 for the Pd/C and the Pd1.3Ru1.0/C catalysts, respectively, a fact not observed for the Pd3.2Ru1.3 Mo1.0 /C and the Pd1.5Ru0.8Mo1.0/C catalysts. The catalytic activities were tested for the ethanol oxidation in alkaline medium. Cyclic voltammetry (CV) shows Pd1.3Ru1.0/C exhibiting the highest peak of current density, followed by Pd3.2Ru1.3Mo1.0/C, Pd1.5Ru0.8Mo1.0/C and Pd/C. From, chronoamperometry (CA), it is possible to observe the lowest rate of poisoning for the Pd1.3Ru1.0/C, followed by Pd3.2Ru1.3Mo1.0/C, Pd1.5Ru0.8Mo1.0/C and Pd/C. These results suggested that catalytic activity of the binary and the ternary catalysts are improved in comparison with Pd/C. The presence of RuO2 activated the bifunctional mechanism and improved the catalytic activity in the Pd1.3Ru1.0/C catalyst. The addition of Mo in the catalysts enhanced the catalytic activity by the intrinsic mechanism, suggesting a synergistic effect between metals. In summary, we suggest that it is possible to synthesize ternary PdRuMo catalysts supported on Carbon Vulcan XC72, resulting in materials with lower poisoning rates and lower costs than Pd/C. Graphic abstract

Chiral CuO@Ni with continuous macroporous framework and its high catalytic activity for electrochemical water oxidation

2021 ◽  
Vol 46 (13) ◽  
pp. 8922-8931
Author(s):  
Wenyan Zhang ◽  
Wei Wang ◽  
Yingfei Hu ◽  
Hangmin Guan ◽  
Xiaoli Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Water Oxidation ◽  
High Catalytic Activity

Rutile TiO2 single crystals delivering enhanced photocatalytic oxygen evolution performance

Nanoscale ◽  
2021 ◽  
Author(s):  
Bing Fu ◽  
Zhijiao Wu ◽  
Kai Guo ◽  
Lingyu Piao
Keyword(s):  
Catalytic Activity ◽  
Single Crystals ◽  
Oxygen Evolution ◽  
Water Oxidation ◽  
Charge Separation ◽  
High Surface ◽  
Rutile Tio2 ◽  
Highly Efficient ◽  
Photogenerated Charge Separation

Owing to their scientific and technological importance, the development of highly efficient photocatalytic water oxidation systems with rapid photogenerated charge separation and high surface catalytic activity has highly desirable for...

scholarly journals Energetic basis of catalytic activity of layered nanophase calcium manganese oxides for water oxidation

2013 ◽  
Vol 110 (22) ◽  
pp. 8801-8806 ◽  
Author(s):  
N. Birkner ◽  
S. Nayeri ◽  
B. Pashaei ◽  
M. M. Najafpour ◽  
W. H. Casey ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Water Oxidation ◽  
Manganese Oxides

Active Pd(ii) complexes: enhancing catalytic activity by ligand effect for carbonylation of methyl nitrite to dimethyl carbonate

2017 ◽  
Vol 7 (17) ◽  
pp. 3785-3790 ◽  
Author(s):  
Hong-Zi Tan ◽  
Zhi-Qiao Wang ◽  
Zhong-Ning Xu ◽  
Jing Sun ◽  
Zhe-Ning Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Dimethyl Carbonate ◽  
Ligand Effect ◽  
Methyl Nitrite ◽  
Catalytic Activities

The catalytic activities of Pd(ii) complexes for carbonylation of methyl nitrite to dimethyl carbonate could be enhanced by ligand effect.

Polymer-Bound 1-Aryl-3-alkyltriazenes as Modular Ligands for Catalysis. Part 2: Screening Immobilized Metal Complexes for Catalytic Activity

2002 ◽  
Vol 12 (14) ◽  
pp. 1849-1851 ◽  
Author(s):  
Stefan Bräse ◽  
Stefan Dahmen ◽  
Frank Lauterwasser ◽  
Nicholas E. Leadbeater ◽  
Emma L. Sharp
Keyword(s):  
Catalytic Activity ◽  
Metal Complexes
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