Effect of carbon support on the catalytic activity of copper-based catalyst in CO2 electroreduction

2020 ◽  
Vol 248 ◽  
pp. 117083 ◽  
Author(s):  
Carlos Jiménez ◽  
María Isabel Cerrillo ◽  
Fabiola Martínez ◽  
Rafael Camarillo ◽  
Jesusa Rincón
Keyword(s):  
Catalytic Activity ◽  
Carbon Support ◽  
Co2 Electroreduction ◽  
Copper Based Catalyst

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

scholarly journals Carbon-Supported Fe Catalysts forCO2Electroreduction to High-Added Value Products: A DEMS Study: Effect of the Functionalization of the Support

2011 ◽  
Vol 2011 ◽  
pp. 1-13 ◽  
Author(s):  
S. Pérez-Rodríguez ◽  
G. García ◽  
L. Calvillo ◽  
V. Celorrio ◽  
E. Pastor ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ethylene Glycol ◽  
Surface Chemistry ◽  
Physicochemical Properties ◽  
Electrochemical Properties ◽  
Textural Properties ◽  
Carbon Support ◽  
Product Distribution ◽  
Added Value ◽  
Fe Catalysts

Vulcan XC-72R-supported Fe catalysts have been synthesised for the electroreduction of CO2to high-added value products. Catalysts were obtained by the polyol method, using ethylene glycol as solvent and reducing agent. Prior to the metal deposition, Vulcan was subjected to different oxidation treatments in order to modify its surface chemistry and study its influence on the physicochemical and electrochemical properties of the catalysts, as well as on the product distribution. The oxidation treatments of the supports modify their textural properties, but do not affect significantly the physicochemical properties of catalysts. However, DEMS studies showed that the carbon support degradation, the distribution of products, and the catalytic activity toward the CO2electroreduction reaction depend significantly on the surface chemistry of the carbon support.

Electrooxidation of Methanol on Carbon Supported Gold Nanoparticles

2013 ◽  
Vol 313-314 ◽  
pp. 232-236
Author(s):  
Dan Zhang
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Competitive Adsorption ◽  
Chemical Reduction ◽  
Reduction Process ◽  
Carbon Support ◽  
Transmission Electron ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

Activated carbon supported gold nanoparticles (Au/C) were prepared by a chemical reduction process using NaBH4as a reducing agent. The characterization of transmission electron microscope indicated that the Au nanoparticles (AuNPs) in the Au/C catalyst were highly well dispersed on the carbon support. The catalytic activity of the Au/C catalyst for the methanol electrooxidation (MEO) was investigated by the cyclic voltammetry (CV). The results displayed that the Au/C catalyst exhibited a favorable catalytic activity towards the MEO in alkaline solution. Moreover, the competitive adsorption between OH-and CH3OH on the surface of the AuNPs in the Au/C catalyst existed in the course of the MEO. Based on this competitive adsorption, the mechanism of the MEO on the Au/C catalyst was further investigated.

scholarly journals Copper on carbon materials: stabilization by nitrogen doping

2017 ◽  
Vol 5 (21) ◽  
pp. 10574-10583 ◽  
Author(s):  
Dmitri A. Bulushev ◽  
Andrey L. Chuvilin ◽  
Vladimir I. Sobolev ◽  
Svetlana G. Stolyarova ◽  
Yury V. Shubin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Formic Acid ◽  
Nitrogen Doping ◽  
Carbon Materials ◽  
Carbon Support ◽  
High Catalytic Activity ◽  
N Doping

N-doping of carbon support prevents sintering of Cu and provides its high catalytic activity in H2 formation from formic acid.

Enhanced Catalytic Activity of Cobalt Porphyrin in CO2 Electroreduction upon Immobilization on Carbon Materials

2017 ◽  
Vol 129 (23) ◽  
pp. 6568-6572 ◽  
Author(s):  
Xin-Ming Hu ◽  
Magnus H. Rønne ◽  
Steen U. Pedersen ◽  
Troels Skrydstrup ◽  
Kim Daasbjerg
Keyword(s):  
Catalytic Activity ◽  
Carbon Materials ◽  
Cobalt Porphyrin ◽  
Co2 Electroreduction

scholarly journals Atomically dispersed Fe3+ sites catalyze efficient CO2 electroreduction to CO

Science ◽  
2019 ◽  
Vol 364 (6445) ◽  
pp. 1091-1094 ◽  
Author(s):  
Jun Gu ◽  
Chia-Shuo Hsu ◽  
Lichen Bai ◽  
Hao Ming Chen ◽  
Xile Hu
Keyword(s):  
Active Sites ◽  
Carbon Support ◽  
Single Atom ◽  
Electronic Coupling ◽  
X Ray ◽  
Precious Metal Catalysts ◽  
Co2 Electroreduction ◽  
X Ray Absorption ◽  
Partial Current ◽  
Modest Activity

Currently, the most active electrocatalysts for the conversion of CO2 to CO are gold-based nanomaterials, whereas non–precious metal catalysts have shown low to modest activity. Here, we report a catalyst of dispersed single-atom iron sites that produces CO at an overpotential as low as 80 millivolts. Partial current density reaches 94 milliamperes per square centimeter at an overpotential of 340 millivolts. Operando x-ray absorption spectroscopy revealed the active sites to be discrete Fe3+ ions, coordinated to pyrrolic nitrogen (N) atoms of the N-doped carbon support, that maintain their +3 oxidation state during electrocatalysis, probably through electronic coupling to the conductive carbon support. Electrochemical data suggest that the Fe3+ sites derive their superior activity from faster CO2 adsorption and weaker CO absorption than that of conventional Fe2+ sites.

Rotating ring-disk voltammetry: Diagnosis of catalytic activity of metallic copper catalysts toward CO2 electroreduction

2017 ◽  
Vol 53 (10) ◽  
pp. 1194-1203 ◽  
Author(s):  
A. Wadas ◽  
I. A. Rutkowska ◽  
M. Bartel ◽  
S. Zoladek ◽  
K. Rajeshwar ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metallic Copper ◽  
Copper Catalysts ◽  
Co2 Electroreduction
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