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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Light-induced spatial separation of charges toward different crystal facets of square-like WO3.
TL;DR: Light-induced preferential migration of electrons and holes to the minor (200) and (020) facets and the dominant (002) facets of square-like WO3, respectively, resulted in the squares with higher photocatalytic activity than that Pt loaded on the minor facets.
Journal ArticleDOI
Transparent Bendable Secondary Zinc-Air Batteries by Controlled Void Ionic Separators.
TL;DR: First ever transparent bendable secondary zinc-air batteries were fabricated and shows both transparent and flexible properties while maintaining a stable discharge/charge operation.
Journal ArticleDOI
Liquid-exfoliated molybdenum telluride nanosheets with superior electrocatalytic hydrogen evolution performances
TL;DR: In this article, a three-electrode electrochemical system test results demonstrated that the MoTe2 nanosheets have excellent electrocatalytic activity and stability in H2SO4 solution compared to bulk Molybdenum telluride.
Journal ArticleDOI
Hierarchical Zn‐Doped CoO Nanoflowers for Electrocatalytic Oxygen Evolution Reaction
Meiling Huo,Zhiyuan Yang,Chenxi Yang,Zhong Gao,Jing Qi,Zuozhong Liang,Kaiqiang Liu,Heyin Chen,Haoquan Zheng,Rui Cao,Rui Cao +10 more
TL;DR: Hierarchical Zn-doped CoO nanoflowers have been prepared using their hydroxides as precursors as mentioned in this paper, which are assembled by dozens of 2D nanoplates.
Journal ArticleDOI
Tailored fabrication of iridium nanoparticle-sensitized titanium oxynitride nanotubes for solar-driven water splitting: experimental insights on the photocatalytic–activity–defects relationship
Kamel Eid,Khaled A. Soliman,Dana Abdulmalik,Dariusz Mitoraj,Mostafa H. Sleim,Maciej Oskar Liedke,Hany A. El-Sayed,Amina S. Aljaber,I.Y. Al-Qaradawi,Oliver Mendoza Reyes,Aboubakr M. Abdullah +10 more
TL;DR: In this paper, the photocatalytic-activity-defects relationship of titanium oxynitride nanotubes (TiON-NTs) is analyzed using PALS and variable-energy positron annihilation spectroscopy (VEPAS).
References
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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
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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.
Journal ArticleDOI
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 ).