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
Citations
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Connected iridium nanoparticle catalysts coated onto silica with high density for oxygen evolution in polymer electrolyte water electrolysis
TL;DR: In this article, the authors proposed connected Ir nanoparticle catalysts (Ir/SiO2) by coating 1.8 nm Ir particles with high density onto silica for the oxygen evolution reaction.
Journal ArticleDOI
Phosphorus and cobalt co-doped reduced graphene oxide bifunctional electrocatalyst for oxygen reduction and evolution reactions
TL;DR: In this paper, a facile electrostatic assembly followed by a pyrolysis process was used to develop a co-doped reduced graphene oxide (P-Co-rGO) catalyst.
Journal ArticleDOI
Recent developments in polydopamine-based photocatalytic nanocomposites for energy production: Physico-chemical properties and perspectives
TL;DR: A review of the latest developments and studies on photocatalytic nanocomposites based on polydopamine (PDA) is presented in this article, where the authors introduce general aspects such as structure and polymerization control.
Journal ArticleDOI
Effect of Cobalt Doping-Regulated Crystallinity in Nickel-Iron Layered Double Hydroxide Catalyzing Oxygen Evolution
TL;DR: In this article , a similar element substitution approach is reported to regulate the catalyst's crystallinity, which enables the formation of a crystalline-amorphous (c-a) interface by modulating the crystallinity of the material.
Journal ArticleDOI
Controlling the 3-D morphology of Ni–Fe-based nanocatalysts for the oxygen evolution reaction
Ryan Manso,Prashant Acharya,Shiqing Deng,Shiqing Deng,Cameron C. Crane,Benjamin Reinhart,Sungsik Lee,Xiao Tong,Dmytro Nykypanchuk,Jing Zhu,Yimei Zhu,Lauren F. Greenlee,Jingyi Chen +12 more
TL;DR: The Ni diffusion from the amorphous Ni-based core to the iron oxide shell makes the NiOx-NiOx/ FeOx core-mixed shell structure the most active and the most stable nanocatalyst, which outperforms the comparison NiOx/FeOx alloy nanoparticles expected to be active for the OER.
References
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Journal ArticleDOI
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Universality in Oxygen Evolution Electrocatalysis on Oxide Surfaces
Isabela C. Man,Hai-Yan Su,Federico Calle-Vallejo,Heine Anton Hansen,José I. Martínez,Nilay İnoğlu,John R. Kitchin,Thomas F. Jaramillo,Jens K. Nørskov,Jan Rossmeisl +9 more
TL;DR: In this article, a large database of HO* and HOO* adsorption energies on oxide surfaces was used to analyze the reaction free energy diagrams of all the oxides in a general way.
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TL;DR: In this paper, density functional theory (DFT) calculations are performed to analyze the electrochemical water-splitting process producing molecular oxygen (O 2 ) and hydrogen (H 2 ).