Aromatic amines as proton carriers for catalytic enhancement of hydrogen evolution reaction on copper in acid solutions

Văduva, Constantin Claudiu; Vaszilcsin, Nicolae; Kellenberger, Andrea

doi:10.1016/j.ijhydene.2012.06.042

Cited by 18 publications

(10 citation statements)

References 22 publications

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“…The binding energy of acrylamide oligomer (CH x -CO-NH 2 ) 4 are computed to be even higher, at -2.05 eV and -2.32 eV for the Cu (100) and Cu (111) surfaces, respectively.Thus, both surfaces are expected to be partially covered by acrylamide oligomer, while va-20 cant surface sites are available for CO 2 adsorption and subsequent reduction reactions. The adsorption and inhibitive effect of poly(allylamine) which does not contain carbonyl groups must follow a different mechanism, possibly adsorbing on copper through the nitrogen atom and enhancing the hydrogen evolution reaction by acting as a proton shuttler 61,62.…”

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confidence: 99%

Poly-Amide Modified Copper Foam Electrodes for Enhanced Electrochemical Reduction of Carbon Dioxide

et al. 2018

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A strategy to modulate the electrocatalytic activity of copper towards CO 2 reduction involving adsorption of acrylamide, acrylic acid and allylamine polymers is presented. Modification of electrodeposited copper foam with poly(acrylamide) leads to a significant enhancement in faradaic efficiency for ethylene from 13% (unmodified foam) to 26% at-0.96 V vs. RHE, whereas methane yield is unaffected. Effects from crystalline phase distribution and copper oxide phases are ruled out as the source of enhancement through XPS and in-situ XRD analysis. DFT calculations reveal that poly(acrylamide) adsorbs on the copper surface via the oxygen atom on the carbonyl groups, and enhances ethylene formation by i) charge donation to the copper surface that activates 1

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confidence: 99%

Poly-Amide Modified Copper Foam Electrodes for Enhanced Electrochemical Reduction of Carbon Dioxide

et al. 2018

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“…Amines are known for their hydrogen evolution enhancing effect on copper. Benzylamine in sulfuric acid aqueous solution decreases the activation energy of hydrogen evolution on copper from 94.6 to 33.0 kJ mol −1 [37], with aryl-ammonium ions adsorbed on copper inducing a highly effective surface concentration of protons [38].…”

Section: Electrodeposition Of Copper In the Presence Of H 2 N-mwnctsmentioning

confidence: 98%

Understanding the effect of carbon nanotube functionalization on copper electrodeposition

2019

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The dynamics of electrochemical deposition and dissolution of copper in the presence of functionalized multiwalled carbon nanotubes in solution has been studied in detail using an electrochemical quartz crystal microbalance. Results demonstrate the central role of carbon nanotube functionalization on the values of mass and current densities of copper deposition. Amine functionalization increases competitive hydrogen evolution without significantly affecting the total amount of deposited copper, whereas carboxylic functionalization clearly enhances the deposition of larger amounts of smoother copper deposits. Molar mass analysis of deposited species reveals interactions of carbon nanotubes with the electrode surface dependent on the type of functionalization. The effect of carbon nanotube functionalization should be closely considered in the development of electrochemical strategies for the integration of carbon nanotubes in metallic copper.

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“…studied the HER at surface of Cu electrode in both alkaline and acidic media. Vaduva et al . learned the catalytic effect of some aromatic amines as proton carriers towards HER on the Cu electrode in diluted sulfuric acid solution.…”

Section: Introductionmentioning

confidence: 99%

“…Newly, abundant efforts have developed the HER in different media at the surface of carbon paste electrode (CPE) modified with Ni ferrite nanoparticles, [29] metal hexacyanoferrate films [30] and metal phthalocyanines nanoparticles. [31] Also, Behzadian et al [32] studied the HER at [33,34] learned the catalytic effect of some aromatic amines as proton carriers towards HER on the Cu electrode in diluted sulfuric acid solution. The HER was also studied by Koca [35] using copper phthalocyanine complex as an electrocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Performance Evaluation of Pd‐Cu Nanoparticles for Hydrogen Evolution Reaction

Hosseini

Ghasemi

2019

ChemistrySelect

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Herein, the effects of different types of surfactants including sodium dodecyl sulfate (SDS), cetyltrimethyl ammonium bromide (CTAB), and t‐octyl phenoxy polyethoxy ethanol (Triton X‐100, TX‐100) were presented on the hydrogen evolution reaction (HER) at the surface of carbon paste electrode (CPE) modified with Pd−Cu nanoparticles. Firstly, Cu nanoparticles with average diameters at about 80 nm were electro‐deposited at the CPE surface in H2SO4 solution containing CTAB and CuSO4 by potentiostatic method. Then, Pd−Cu bimetallic nanoparticles with diameters at about 75 nm were prepared through galvanic replacement reaction between PdII ions and Cu particles. The synthesized Cu nanoparticles were covered by CTAB in solution and surface tension of the nanoparticles were decreased, and consequently stabilized. Also, the surfactants play different roles on the HER depending on the electrode polarity and surface charges. The electro‐catalytic activity of the Pd−Cu/CPE and nano‐Cu/CPE towards HER was found to be highest in the presence of SDS. The effects of galvanic replacement reaction and type of surfactants on kinetic parameters of the HER such as cathodic electron transfer coefficient and exchange current density were comparatively investigated.

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Aromatic amines as proton carriers for catalytic enhancement of hydrogen evolution reaction on copper in acid solutions

Cited by 18 publications

References 22 publications

Poly-Amide Modified Copper Foam Electrodes for Enhanced Electrochemical Reduction of Carbon Dioxide

Poly-Amide Modified Copper Foam Electrodes for Enhanced Electrochemical Reduction of Carbon Dioxide

Understanding the effect of carbon nanotube functionalization on copper electrodeposition

Fabrication and Performance Evaluation of Pd‐Cu Nanoparticles for Hydrogen Evolution Reaction

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