Journal ArticleDOI
Electrocatalytic Oxygen Evolution Reaction (OER) on Ru, Ir, and Pt Catalysts: A Comparative Study of Nanoparticles and Bulk Materials
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In this article, the intrinsic catalytic activity and durability of carbon supported Ru, Ir, and Pt nanoparticles and corresponding bulk materials for the electrocatalytic oxygen evolution reaction (OER) were examined by surface-sensitive cyclic voltammetry.Abstract:
A comparative investigation was performed to examine the intrinsic catalytic activity and durability of carbon supported Ru, Ir, and Pt nanoparticles and corresponding bulk materials for the electrocatalytic oxygen evolution reaction (OER). The electrochemical surface characteristics of nanoparticles and bulk materials were studied by surface-sensitive cyclic voltammetry. Although basically similar voltammetric features were observed for nanoparticles and bulk materials of each metal, some differences were uncovered highlighting the changes in oxidation chemistry. On the basis of the electrochemical results, we demonstrated that Ru nanoparticles show lower passivation potentials compared to bulk Ru material. Ir nanoparticles completely lost their voltammetric metallic features during the voltage cycling, in contrast to the corresponding bulk material. Finally, Pt nanoparticles show an increased oxophilic nature compared to bulk Pt. With regard to the OER performance, the most pronounced effects of nanosca...read more
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Mn(x)O(y)/NC and Co(x)O(y)/NC nanoparticles embedded in a nitrogen-doped carbon matrix for high-performance bifunctional oxygen electrodes.
Justus Masa,Wei Xia,Ilya Sinev,Anqi Zhao,Zhenyu Sun,Stefanie Grützke,Philipp Weide,Martin Muhler,Wolfgang Schuhmann +8 more
TL;DR: Exceptionally active bifunctional catalysts for oxygen electrodes comprising Mn3O4 and Co3O 4 nanoparticles embedded in nitrogen-doped carbon obtained by selective pyrolysis and subsequent mild calcination of manganese and cobalt N4 macrocyclic complexes are reported.
Journal ArticleDOI
Electrocatalytic oxygen evolution at surface-oxidized multiwall carbon nanotubes
TL;DR: It is shown that, upon mild surface oxidation, hydrothermal annealing and electrochemical activation, multiwall carbon nanotubes (MWCNTs) themselves are effective water oxidation catalysts, which can initiate the oxygen evolution reaction (OER) at overpotentials of 0.3 V in alkaline media.
Journal ArticleDOI
Iridium As Catalyst and Cocatalyst for Oxygen Evolution/Reduction in Acidic Polymer Electrolyte Membrane Electrolyzers and Fuel Cells
TL;DR: In this article, an overview of the application of Ir and Ir-containing catalysts for the oxygen reduction reaction (ORR) in proton-exchange membrane water electrolyzer anodes, for both OER and ORR in unit regenerative fuel cell oxygen electrodes is presented.
Journal ArticleDOI
Benchmarking nanoparticulate metal oxide electrocatalysts for the alkaline water oxidation reaction
Suho Jung,Charles C. L. McCrory,Ivonne M. Ferrer,Jonas C. Peters,Thomas F. Jaramillo,Thomas F. Jaramillo +5 more
TL;DR: In this paper, a conventional drop-casting method was used for the successful adhesion of a wide range of nanoparticulate catalysts to glassy-carbon electrode surfaces, achieving 10 mA cm−2 current densities per geometric area at overpotentials of ∼0.35-0.5 V.
Journal ArticleDOI
Iron–Nickel Nitride Nanostructures in Situ Grown on Surface-Redox-Etching Nickel Foam: Efficient and Ultrasustainable Electrocatalysts for Overall Water Splitting
TL;DR: In this article, the authors report an in situ growth of iron-nickel nitride nanostructures on surface-redox-etching Ni foam (FeNi3N/NF) as a bifunctional electrocatalyst for overall water splitting.
References
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Journal ArticleDOI
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Journal ArticleDOI
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