Ultrafine Pt–Ni nanoparticles in hollow porous carbon spheres for remarkable oxygen reduction reaction catalysis

Abstract

Ultrafine bimetallic Pt-Ni nanoparticles, which catalyzed the oxygen reduction reaction (ORR) efficiently, were successfully prepared in hollow porous carbon spheres (HPCSs) under assistance of organic molecules. 2,2′-Dipyridylamine (dpa) was found...

Solid-State Reaction Synthesis of Nanoscale Materials: Strategies and Applications

“…Mesoporous silica matrices such as SBA-15, which consist of long cylindrical mesopores (4.6–30 nm size) arranged in a hexagonal array, are one of the most utilized support materials. − Silica-based materials with tunable architectures, such as fibrous and dendritic mesoporous silica, have also been used as host materials to synthesize and accommodate metal NCs. − Carbon-based materials provide conductive and chemically robust enclosures for guest NCs, which is highly beneficial, particularly for electrochemical applications. In this regard, CNTs, − ordered mesoporous carbon, , and hollow porous carbon spheres have been utilized. − Over the years, different methods have been developed to reliably synthesize a range of metal NCs within the pores of different support materials, depending on their chemical nature and processability. “Incipient wetness impregnation” is a commonly used technique for the synthesis of supported heterogeneous catalytic NCs.…”

Local structures and robust oxygen reduction performances of TiN-supported bimetallic Pt–Cu electrocatalysts for fuel cells

“…SSA and MSA were estimated by normalizing j k with ECSA and the loaded Pt amount on the WE, respectively. 51…”

Molten salt synthesis of carbon-supported Pt–rare earth metal nanoalloy catalysts for oxygen reduction reaction

“…Nowadays proton exchange membrane fuel cells (PEMFCs), directly generating electrical energy through hydrogen oxidation at the anode and oxygen reduction reaction (ORR) at the cathode, [1][2][3] have received extensive attention in renewable energy elds (e.g. fuel cell electric vehicles), due to their advantages of low pollution and high specic energy.…”