Catalytic characterization of hollow silver/palladium nanoparticles synthesized by a displacement reaction

In situ liquid-cell electron microscopy of silver–palladium galvanic replacement reactions on silver nanoparticles

“…Furthermore, initially homogeneous metal nanoparticles with well-defined shapes can serve as a starting material in galvanic replacement reactions, in which they are used as sacrificial templates to produce hollow and porous nanostructures with complex morphologies, such as nanoboxes or nanocages [1][2][3][4][5][6][7][8][9] . Such hollow and porous structures have drawn interest as they can shift plasmon resonances compared with those of solid nanoparticles 5,10 , may provide nanoscale containers for biomedical applications such as diagnostics and drug delivery 11 , are of use as contrast enhancement agents in optical imaging such as optical coherence 12 , photoacoustic tomography 13,14 , and are found to be highly active in catalysis [15][16][17][18][19][20] and electrocatalysis 21,22 . The galvanic replacement reaction is critical in the advanced two-step synthesis of fuel cell electrocatalysts with reduced precious metal loadings, limited to a thin surface layer or even a monolayer on top of less expensive metal nanoparticles [23][24][25][26][27][28][29][30][31][32][33] .…”

The AgcorePdshell bimetallic nanoparticles: simple biological synthesis and characterization

“…4 TEM images (a, b) and schematic of controlled particle size reduction of Ag-Pd bimetallic nanoparticles in the galvanic replacement reaction between PdCl 2 and Ag nanoparticles in the presence of soaproot extract (c) 5-35 nm, respectively. In the galvanic replacement reaction, it has been previously reported by the authors [52,53] that addition of metal ions to metal nanoparticles dissolves a part of metallic nanotemplate and changes the initial morphology and size of the nanotemplate. A typical example for this case is the addition of HAuCl 4 to Ag nanocubes [54].…”

Research on preparation of cathode materials for hydrogen evolution and their photo-electrochemical properties

“…The facts that the concentration of the silver nitrate concentration, the concentration of ethylenediamine, and the displacement reaction time all had little effect could come from the much higher reactivity of silver than copper judging by their standard reduction potentials [54,55]:…”