Open Access
Structural Dependence of Oxygen Reduction Reaction on Palladium Nanocrystals
Minhua Shao,Taekyung Yu,Jonathan H. Odell,Mingshang Jin,Younan Xia +4 more
- Iss: 16, pp 1011-1011
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TLDR
The ORR activity of Pd nanocubes was one order of magnitude higher than that of PD octahedra, and comparable to that of the state-of-the-art Pt catalysts.Abstract:
We have synthesized sub-10 nm Pd cubic and octahedral nanocrystals and then evaluated their activities towards oxygen reduction reaction (ORR). The ORR activity of Pd nanocubes was one order of magnitude higher than that of Pd octahedra, and comparable to that of the state-of-the-art Pt catalysts.read more
Citations
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Palladium–iridium nanocrystals for enhancement of electrocatalytic activity toward oxygen reduction reaction
TL;DR: A series of Pd-Ir bimetallic nanoparticles with wire or dendritic shapes in a wide composition range, which were synthesized through a facile hydrothermal strategy, showed comparable catalytic activities to that of commercial Pt catalyst.
Journal ArticleDOI
Controllable Synthesis of Concave Nanocubes, Right Bipyramids, and 5-Fold Twinned Nanorods of Palladium and Their Enhanced Electrocatalytic Performance
TL;DR: In this paper, concave palladium nanocubes have been synthesized kinetically in high yield via a facile one-step wet chemical method using sodium ascorbate (NaA) as the reductant in an aqueous solution.
Journal ArticleDOI
Electrocatalytic activity of well-defined and homogeneous cubic-shaped Pd nanoparticles
Noé Arjona,Minerva Guerra-Balcázar,Luis Ortiz-Frade,G. Osorio-Monreal,Lorena Álvarez-Contreras,Janet Ledesma-García,Luis Gerardo Arriaga +6 more
TL;DR: In this paper, a well-ordered cube-shaped highly ordered Pd was obtained by chemical reduction in aqueous media by employing ascorbic acid, polyvinylpyrrolidone and sodium bromide as reducing agent, surfactant and additive.
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Systematic Control of Redox Properties and Oxygen Reduction Reactivity through Colloidal Ligand-Exchange Deposition of Pd on Au.
TL;DR: Colloidal ligand-exchange synthesis may be particularly useful for noble metal core-shell catalysts as a strategy to subtly tune the electronic properties of surface atoms in order to lower overpotential and increase catalytic turnover.
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Synthesis of chestnut-bur-like palladium nanostructures and their enhanced electrocatalytic activities for ethanol oxidation
TL;DR: A facile method for the synthesis of Pd nanostructures with highly open structure and huge surface area by reducing Na₂PdCl₄ with ascorbic acid and using cetylpyridinium chloride (CPC) as a surfactant in an aqueous solution is reported.
References
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Journal ArticleDOI
Origin of the Overpotential for Oxygen Reduction at a Fuel-Cell Cathode
Jens K. Nørskov,Jan Rossmeisl,and Ashildur Logadottir,L. Lindqvist,John R. Kitchin,Thomas Bligaard,Hannes Jónsson +6 more
TL;DR: In this paper, the stability of reaction intermediates of electrochemical processes on the basis of electronic structure calculations was analyzed and a detailed description of the free energy landscape of the electrochemical oxygen reduction reaction over Pt(111) as a function of applied bias was presented.
Journal ArticleDOI
Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs
TL;DR: In this article, the authors quantified the activities and voltage loss modes for state-of-the-art MEAs (membrane electrode assemblies), specifies performance goals needed for automotive application, and provides benchmark oxygen reduction activities for state of the art platinum electrocatalysts.
Journal ArticleDOI
Improved Oxygen Reduction Activity on Pt3Ni(111) via Increased Surface Site Availability
Vojislav R. Stamenkovic,Vojislav R. Stamenkovic,Ben Fowler,Bongjin Simon Mun,Guofeng Wang,Philip N. Ross,Chris Lucas,Nenad M. Markovic +7 more
TL;DR: It is demonstrated that the Pt3Ni( 111) surface is 10-fold more active for the ORR than the corresponding Pt(111) surface and 90-foldMore active than the current state-of-the-art Pt/C catalysts for PEMFC.
Book
Handbook of fuel cells : fundamentals technology and applications
TL;DR: In this article, the authors present a survey of fuel cell technologies and applications, focusing on hydrogen storage, hydrogen generation, and other energy conversion related topics, as well as their applications.
Journal ArticleDOI
Oxygen Reduction Reaction on Pt and Pt Bimetallic Surfaces: A Selective Review
TL;DR: In this article, a review of recent progress in the development of the oxygen reduction reaction (ORR) catalysis on well-defined surfaces is presented, focusing on two type of metallic surfaces: platinum single crystals and bimetallic surfaces based on platinum.