Synthesis of metal cation doped nanoparticles for single atom alloy catalysts using spontaneous cation exchange

Abstract

Ion exchange is a chemical reaction in which the ionic components of a solid parent material are exchanged with other ions. It often happens in metal chalcogenide and ionic metal...

Dual-Cation-Doped Pd Nanocube Supported on Aminoclay for Catalytic Reduction of 4-Nitrophenol

“…Synthesis of cubic Pd nanoparticles with an average size of 6 nm was performed according to previous work (Figure a) . Fe and Ce cation-doped Pd nanocubes were prepared by adding aqueous FeCl 3 and CeCl 3 solutions to Pd nanocube suspension under acidic conditions (pH of 1.4) at 30 °C Figure b–d shows the TEM images of the synthesized PdFe 5 Ce 15 , PdFe 10 Ce 10 , and PdFe 15 Ce 5 , indicating that the size and morphology of the nanocubes had no noticeable change to those of the original cubic Pd nanoparticles.…”

“…39 We previously synthesized single-atom catalysts (SACs) by doping metal cations onto the surface of Pd NPs through cation exchange, ensuring that the metal cations did not overlap. 40 Although single-metal cation doping has been proven to be an effective approach to enhance the electrochemical catalytic reactivity, the extent of the enhancement effect is still relatively restricted, possibly because of the inadequate electronic structure modulation. Additionally, the electronic interactions between metal elements in singlecation-doped catalysts have not been effectively resolved yet.…”