Electro‐Oxidation of Formaldehyde at Silver Anodes—Role of Submonolayer Hydroxy Complexes in Noble Metal Electrocatalysis

1988 ◽  
Vol 135 (8) ◽  
pp. 1965-1970 ◽  
Author(s):  
L. D. Burke ◽  
W. A. O'Leary
Keyword(s):  
Noble Metal ◽  
Electro Oxidation

scholarly journals Robust and efficient hydrogenation of carbonyl compounds catalysed by mixed donor Mn(I) pincer complexes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Wenjun Yang ◽  
Ivan Yu. Chernyshov ◽  
Robin K. A. van Schendel ◽  
Manuela Weber ◽  
Christian Müller ◽  
...  
Keyword(s):  
Noble Metal ◽  
Crucial Role ◽  
Carbonyl Compounds ◽  
Catalytic Performance ◽  
Hydrogen Atmosphere ◽  
Pincer Complexes ◽  
Catalyst Activation ◽  
Hydrogenation Catalysts ◽  
Induction Times

AbstractAny catalyst should be efficient and stable to be implemented in practice. This requirement is particularly valid for manganese hydrogenation catalysts. While representing a more sustainable alternative to conventional noble metal-based systems, manganese hydrogenation catalysts are prone to degrade under catalytic conditions once operation temperatures are high. Herein, we report a highly efficient Mn(I)-CNP pre-catalyst which gives rise to the excellent productivity (TOF° up to 41 000 h−1) and stability (TON up to 200 000) in hydrogenation catalysis. This system enables near-quantitative hydrogenation of ketones, imines, aldehydes and formate esters at the catalyst loadings as low as 5–200 p.p.m. Our analysis points to the crucial role of the catalyst activation step for the catalytic performance and stability of the system. While conventional activation employing alkoxide bases can ultimately provide catalytically competent species under hydrogen atmosphere, activation of Mn(I) pre-catalyst with hydride donor promoters, e.g. KHBEt3, dramatically improves catalytic performance of the system and eliminates induction times associated with slow catalyst activation.

Multifunctional Noble Metal Phosphide Electrocatalysts for Organic Molecule Electro-Oxidation

2021 ◽  
Vol 4 (2) ◽  
pp. 1593-1600 ◽  
Author(s):  
Zhipeng Yu ◽  
Xian-Kui Wei ◽  
Junyuan Xu ◽  
Yue Li ◽  
Ana Araujo ◽  
...  
Keyword(s):  
Noble Metal ◽  
Organic Molecule ◽  
Metal Phosphide ◽  
Electro Oxidation

scholarly journals On the role of surface diffusion in determining the shape or morphology of noble-metal nanocrystals

2013 ◽  
Vol 110 (17) ◽  
pp. 6669-6673 ◽  
Author(s):  
X. Xia ◽  
S. Xie ◽  
M. Liu ◽  
H.-C. Peng ◽  
N. Lu ◽  
...  
Keyword(s):  
Surface Diffusion ◽  
Noble Metal ◽  
Metal Nanocrystals

Non-Noble Metal as Catalysts for Alcohol Electro-oxidation Reaction

2018 ◽  
pp. 263-290 ◽  
Author(s):  
Samuel Dessources ◽  
Diego Xavier del Jesús González-Quijano ◽  
Wilian Jesús Pech-Rodríguez
Keyword(s):  
Noble Metal ◽  
Oxidation Reaction ◽  
Electro Oxidation

General promoting effect of polydopamine on supported noble metal catalysts

2017 ◽  
Vol 5 (39) ◽  
pp. 20789-20796 ◽  
Author(s):  
Mingwei Zhang ◽  
Guozhu Li ◽  
Xiaoqing Sun ◽  
Yujiao Jiang ◽  
Xiangwen Zhang
Keyword(s):  
Noble Metal ◽  
Theoretical Study ◽  
Metal Catalysts ◽  
Promoting Effect ◽  
Noble Metal Catalysts

A joint experimental–theoretical study has been conducted to investigate the role of polydopamine as an interface facilitator for supported noble metal catalysts.

Role of oxygen vacancies for resistive switching in noble metal sandwiched Pr0.67Ca0.33MnO3-δ

2017 ◽  
Vol 110 (24) ◽  
pp. 243502 ◽  
Author(s):  
Thilo Kramer ◽  
Malte Scherff ◽  
Daniel Mierwaldt ◽  
Joerg Hoffmann ◽  
Christian Jooss
Keyword(s):  
Noble Metal ◽  
Resistive Switching ◽  
Oxygen Vacancies

Electro-oxidation of landfill leachate using boron-doped diamond: role of current density, pH and ions

2019 ◽  
Vol 79 (5) ◽  
pp. 921-928 ◽  
Author(s):  
F. Agustina ◽  
A. Y. Bagastyo ◽  
E. Nurhayati
Keyword(s):  
Current Density ◽  
Organic Content ◽  
Cod Removal ◽  
Boron Doped Diamond ◽  
Leachate Treatment ◽  
Ammonium Removal ◽  
Boron Doped ◽  
Wide Range ◽  
Electro Oxidation

Abstract Electro-oxidation using a boron-doped diamond (BDD) anode can be used as an alternative to leachate treatment. Aside from the hydroxyl radical, BDDs are capable of generating chloride and sulfate radical species that play significant roles in the oxidation of pollutants. This research investigated the role of Cl−:SO42− ions at molar ratios of 237:1, 4:1 and 18:1, and the influence of applied current density (i.e. 50, 75 and 100 mA cm−2) on the removal of organic and ammonium contaminants. The results show that current density had considerable effects on chemical oxygen demand (COD) and colour removal, while ion composition of Cl−:SO42− at pH 3, 5 and 8.5 (original pH) gave different effects on COD and ammonium removal. The pH had a significant effect on the COD removal at the ratio of 237:1, but showed no dramatic effect at the ratio of 18:1, giving ∼40% of COD removal at all pHs tested. This indicates that electro-oxidation at the ratio of 18:1 could be effectively conducted at a wide range of pH. Furthermore, the optimum ammonium removal was obtained at pH 8.5 with the ratio of 237:1. This process was found to be ineffective in increasing the biodegradability index of the leachate; instead, it exhibited mineralization of organic content.

scholarly journals Role of reactive oxygen species on the activity of noble metal-doped TiO2 photocatalysts

2019 ◽  
Vol 372 ◽  
pp. 45-51 ◽  
Author(s):  
Paula Ribao ◽  
Juan Corredor ◽  
Maria J. Rivero ◽  
Inmaculada Ortiz
Keyword(s):  
Reactive Oxygen Species ◽  
Noble Metal ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Tio2 Photocatalysts ◽  
Doped Tio2 ◽  
Metal Doped
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