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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Efficient and Stable Evolution of Oxygen Using Pulse-Electrodeposited Ir/Ni Oxide Catalyst in Fe-Spiked KOH Electrolyte
TL;DR: An excellent OER catalytic system consisting of pulse-electrodeposited Ir/Ni oxides in Fe(3+)-spiked 1 M KOH compares favorably against values from several state-of-the-art catalysts and finds that the durability of the Ir/ Ni oxide catalyst during OER could be maintained for more than 4.5 days by simply spiking Fe( 3+), Ir (3+), and Ni(2+) into the KOH electrolyte.
Journal ArticleDOI
CoxFeyN nanoparticles decorated on graphene sheets as high-performance electrocatalysts for the oxygen evolution reaction
Haixia Liu,Xinyao Lu,Yi Hu,Renpeng Chen,Peiyang Zhao,Lei Wang,Guoyin Zhu,Lianbo Ma,Zhong Jin +8 more
TL;DR: In this paper, the authors reported the facile preparation of CoxFeyN nanoparticles uniformly loaded on graphene sheets (CoxFey N/graphene) with amazing OER activity and stability, attributed to the intrinsic metallic characteristics.
Journal ArticleDOI
Recent advances and future perspectives in engineering of bifunctional electrocatalysts for rechargeable zinc–air batteries
TL;DR: In this paper, the latest improvement in engineering of oxygen electrocatalysts for ZABs is specific mentioned following four aspects: precious metals/alloys, transition metal, transition-metal oxides (perovskites, single/mixed metal oxides, and spinels), and carbon-based materials.
Journal ArticleDOI
Metal–Hydroxide and Gold–Nanocluster Interfaces: Enhancing Catalyst Activity and Stability for Oxygen Evolution Reaction
Yao Zhou,Hua Chun Zeng +1 more
TL;DR: In this paper, a series of tubular AuNCs@M(OH)2 core-shell nanocomposites are produced, in which numerous AuNClusters are embedded beneath a thin layer of metal hydroxide with thickness below 4 nm and where the AuNclusters within the same assemblage are partially connected with each other.
References
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Book
Elements of X-ray diffraction
TL;DR: In this article, the authors present a chemical analysis of X-ray diffraction by Xray Spectrometry and phase-diagram Determination of single crystal structures and phase diagrams.
Journal ArticleDOI
Scherrer after sixty years: a survey and some new results in the determination of crystallite size
J. I. Langford,A. J. C. Wilson +1 more
TL;DR: In this article, the Scherrer constants of simple regular shapes have been determined for all low-angle reflections (h2 + k2 + l2 ≤ 100) for four measures of breadth.
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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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Electrolysis of water on oxide surfaces
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 ).