One-dimensional nanostructured electrocatalysts for polymer electrolyte membrane fuel cells—A review

Abstract

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High‐Indexed PtNi Alloy Skin Spiraled on Pd Nanowires for Highly Efficient Oxygen Reduction Reaction Catalysis

“…The morphologies of above catalysts before and after stability testing were also characterized using TEM and HRTEM, revealing that the Pd@PtNi NWs became incomplete hollow structures with the dissolution of Pd and maintained the 1D nanostructure after the stability test (Figures S6a,b and S7a,b, Supporting Information). In contrast, serious sintering and aggregation was observed for PdPtNi NPs/C (Figure S8, Supporting Information) and commercial Pt/C (Figure S9a,b, Supporting Information),therefore demonstrating that the unique 1D nanostructure is more effective at preventing dissolution, Ostwald ripening, and aggregation than nanoparticles during long term operation, and is beneficial for the enhancement of durability of Pt‐based catalysts.…”

Importance of Electrocatalyst Morphology for the Oxygen Reduction Reaction

“…[65][66][67] As for electrocatalysts of the ORR, 1D MÀ NÀ C materials have also attracted great attention. [68] The morphologies of reported 1D MÀ NÀ C materials include nanofibers, nanowires, nanorods, and nanotubes. Nanofibers and nanowires are 1D materials with large aspect ratios (> 100) and nanoscale diameters (< 1000 nm).…”

Efficient synthesis of Pt–Co nanowires as cathode catalysts for proton exchange membrane fuel cells

“…9 Ultrathin PtM alloy nanowires (NWs) not only improve the electrocatalytic performance and utilization efficiency of Pt, but also make alloys difficult to dissolve and agglomerate in the fuel cell operating environment due to the ultrasmall size and the unique one-dimensional morphology, which can improve the durability of the catalyst. [10][11][12][13] In the last few years, the application of strong coordination capping ligands such as oleylamine (OAm) has generated a great interest. This versatile reagent play a specic role in forming nanostructures using a variety of organic or inorganic compounds as precursors either alone or in combination with other reactants, which is an easy method for preparing alloy NWs and could be amplied for production.…”