Electrolyte Effects on the Electrocatalytic Performance of Iridium‐Based Nanoparticles for Oxygen Evolution in Rotating Disc Electrodes

ChemPhysChem ◽  
2019 ◽  
Vol 20 (22) ◽  
pp. 2956-2963 ◽  
Author(s):  
José Alejandro Arminio‐Ravelo ◽  
Anders W. Jensen ◽  
Kim D. Jensen ◽  
Jonathan Quinson ◽  
María Escudero‐Escribano
Keyword(s):  
Oxygen Evolution ◽  
Rotating Disc ◽  
Electrocatalytic Performance ◽  
Disc Electrodes ◽  
Electrolyte Effects

scholarly journals Mechanochemically Synthetized PAN-Based Co-N-Doped Carbon Materials as Electrocatalyst for Oxygen Evolution Reaction

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 290
Author(s):  
Paulette Gómez-López ◽  
José Ángel Salatti-Dorado ◽  
Daily Rodríguez-Padrón ◽  
Manuel Cano ◽  
Clemente G. Alvarado-Beltrán ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Photoelectron Spectroscopy ◽  
Carbon Nanomaterials ◽  
Carbon Materials ◽  
Catalytic Performance ◽  
X Ray Diffraction ◽  
New Class ◽  
Electrocatalytic Performance ◽  
Alkaline Environments ◽  
Metal Doped

We report a new class of polyacrylonitrile (PAN)-based Co-N-doped carbon materials that can act as suitable catalyst for oxygen evolution reactions (OER). Different Co loadings were mechanochemically added into post-consumed PAN fibers. Subsequently, the samples were treated at 300 °C under air (PAN-A) or nitrogen (PAN-N) atmosphere to promote simultaneously the Co3O4 species and PAN cyclization. The resulting electrocatalysts were fully characterized and analyzed by X-ray diffraction (XRD) and photoelectron spectroscopy (XPS), transmission (TEM) and scanning electron (SEM) microscopies, as well as nitrogen porosimetry. The catalytic performance of the Co-N-doped carbon nanomaterials were tested for OER in alkaline environments. Cobalt-doped PAN-A samples showed worse OER electrocatalytic performance than their homologous PAN-N ones. The PAN-N/3% Co catalyst exhibited the lowest OER overpotential (460 mV) among all the Co-N-doped carbon nanocomposites, reaching 10 mA/cm2. This work provides in-depth insights on the electrocatalytic performance of metal-doped carbon nanomaterials for OER.

The oxygen evolution reaction enabled by transition metal phosphide and chalcogenide pre-catalysts with dynamic changes

2019 ◽  
Vol 55 (60) ◽  
pp. 8744-8763 ◽  
Author(s):  
Wei Li ◽  
Dehua Xiong ◽  
Xuefei Gao ◽  
Lifeng Liu
Keyword(s):  
Transition Metal ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Dynamic Changes ◽  
Metal Phosphide ◽  
Electrocatalytic Performance ◽  
Metal Phosphides ◽  
Compositional Changes ◽  
Transition Metal Phosphide ◽  
Transition Metal Phosphides

Dynamic morphological, structural and compositional changes will occur when transition metal phosphides and chalcogenides are used to catalyze the oxygen evolution reaction, which can substantially enhance their electrocatalytic performance.

scholarly journals Development of Electrodeposition System Employing 8 Rotating Disc Electrodes for Highly Reproducible Synthesis of Zinc Oxide Thin Films

2012 ◽  
Vol 80 (11) ◽  
pp. 891-897 ◽  
Author(s):  
Takeshi YANE ◽  
Akira KOYAMA ◽  
Kenta HIRAMATSU ◽  
Yoshitaka ISOGAI ◽  
Keigo ICHINOSE ◽  
...  
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Oxide Thin Films ◽  
Rotating Disc ◽  
Disc Electrodes

Exfoliation of ultrathin FePS3 layers as a promising electrocatalyst for the oxygen evolution reaction

2018 ◽  
Vol 54 (35) ◽  
pp. 4481-4484 ◽  
Author(s):  
Wen Zhu ◽  
Wei Gan ◽  
Zahir Muhammad ◽  
Changda Wang ◽  
Chuanqiang Wu ◽  
...  
Keyword(s):  
Ball Milling ◽  
Oxygen Evolution ◽  
Alkaline Medium ◽  
Oxygen Evolution Reaction ◽  
Chemical Vapor ◽  
Vapor Transport ◽  
Chemical Vapor Transport ◽  
Electrocatalytic Performance

Few-layer ternary FePS3 nanosheets, prepared via chemical vapor transport synthesis and ball-milling exfoliation, exhibit excellent electrocatalytic performance for the oxygen evolution reaction in an alkaline medium.

scholarly journals Influence of Nanocrystalline Palladium Morphology on Alkaline Oxygen Reduction Kinetics

Catalysts ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 566 ◽  
Author(s):  
Eliran Hamo ◽  
Avichay Raviv ◽  
Brian A. Rosen
Keyword(s):  
Oxygen Reduction ◽  
High Surface ◽  
Reduction Reaction ◽  
Membrane Electrode ◽  
X Ray Diffraction ◽  
Rotating Disc ◽  
Force Microscopy ◽  
Atomic Force ◽  
Orr Kinetics ◽  
Disc Electrodes

The structure sensitivity of the alkaline oxygen reduction reaction (ORR) on palladium is of great interest as cost considerations drive the need to find a replacement for platinum catalysts. The kinetics of alkaline ORR were investigated on nanocrystalline palladium (Pd) films with domain sizes between 14 and 30 nm that were synthesized by electrodeposition from aqueous electrolytes. Ten Pd films were prepared under varying electrodeposition parameters leading to each having a unique texture and morphology. The sensitivity of initial alkaline ORR kinetics to the Pd surface structure was evaluated by measuring the kinetic current density and number of electrons transferred for each film. We show through scanning electron microscopy (SEM), x-ray diffraction (XRD), atomic force microscopy (AFM), and voltammetry from rotating disc electrodes (RDEs) that the fastest alkaline ORR kinetics are found on Pd surfaces with high surface roughness, which themselves are composed of fine grains. Such a study is useful for developing membrane electrode assemblies (MEAs) based on directly electrodepositing catalyst onto a conductive diffusion layer.

scholarly journals The role of catalyst–support interactions in oxygen evolution anodes based on Co(OH)2 nanoparticles and carbon microfibers

2020 ◽  
Vol 10 (14) ◽  
pp. 4513-4521
Author(s):  
Laura Mallón ◽  
Nuria Romero ◽  
Alicia Jiménez ◽  
Elena Martín Morales ◽  
José Alemán ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Catalyst Support ◽  
Electrocatalytic Performance ◽  
Metal Support ◽  
Carbon Microfibers

A set of OER electrodes based on Co(OH)2 nanoparticles and carbon microfibers of tailored composition is reported, which allows extracting valuable insights on the influence of the metal-support interface in their electrocatalytic performance.

Rotating disc electrodes: the theory of chronoamperometry and its use in mechanistic investigations

1988 ◽  
Vol 418 (1854) ◽  
pp. 113-154 ◽  
Keyword(s):  
Diffusion Coefficients ◽  
Reaction Mechanisms ◽  
Electrode Reaction ◽  
Rotating Disc ◽  
Potential Step ◽  
Wide Range ◽  
Mechanistic Investigations ◽  
Disc Electrodes ◽  
Theoretical Results ◽  
Computational Strategy

A general computational strategy is presented for the calculation of the chronoamperometric responses arising from potential-step experiments at rotating disc electrodes. The method is applicable to a wide range of electrode reaction mechanisms and theoretical results are given for single- and double-potential-step experiments for ECE, DISP1, DISP2, EC' and CE reactions. For the last, the treatment is extended to cover the case where reactants have grossly unequal diffusion coefficients. Steadystate behaviour is also deduced. The extent to which the various mechanistic pathways can be distinguished is identified and the necessary experiments defined.

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