Unusual attempt to direct the growth of bimetallic Ag@Pt nanorods on electrochemically reduced graphene oxide nanosheets by electroless exchange of Cu by Pt for an efficient alcohol oxidation

Modification with platinum of silver-deposited nickel wire electrodes for electrocatalytic oxidation of alcohols

“…The electrocatalytic response of ethanol (Fig. 2A) is similar to those observed using various Ag-Pt binary electrocatalysts [10][11][12] and Pt electrocatalysts [21], while the peaks in the reverse, negative-going scans were found to be comparable to the peaks in the positive-going scans using other Ag-Pt binary electrocatalysts [13,14]. So, some synergetic effects with Ag may be expected, in addition to enhancing modification with Pt.…”

“…However, there are several reports of Ag-Pt binary electrocatalysts, i.e., Pt/C catalysts with Ag [10], AgPt aerogels [11], Ag@Pt nanorods on electrochemically reduced graphene oxide nanosheets [12], 3D porous PtAg nanotubes [13], and Pt 3 Ag alloy wavy nanowires [14]. While nanostructuring has been reported for Ag-Pt electrocatalysts [10][11][12][13][14], we examined the modification with Pt mainly expecting simple galvanic replacement reactions between Ag and the Pt precursor ions [15][16][17]. Such galvanic replacement reactions have generally been focused on preparing electrocatalysts [18].…”

Gold Nanoparticles Grown by Galvanic Replacement on Graphene-Coated Aluminum Panels as Large-Area Substrates for Surface-Enhanced Raman Scattering

“…Consequently, GR-based nanocomposites have been applied to various fields, such as catalysis, 7,13,14 biosensing, 15−17 surface-enhanced Raman scattering (SERS), 10,18−21 and electrochemical applications. 8,22 SERS, one of the key applications of nanomaterials, has attracted considerable interests because it can provide higher sensitivity than conventional Raman spectroscopy, selective detection, water-free interference, and abundant chemical information. It is believed that the signal enhancement of Raman intensity can be attributed mostly to the electromagnetic enhancement (EM) while the contribution from the charge transfer mechanism (CT) is also significant.…”

“…Although the relatively lower reproducibility of deposited nanostructures has limited their application, GR reaction-based nanocomposite fabrication has still been attracting substantial research attention because of its advantages of fast product preparation, cost effectiveness, and mass production potential. Different nanomaterial morphologies, such as nanocubes, nanohexagonal particles, nanodendrites, , nanoparticles, , nanorods, , nanobelts, and others, − can be fabricated using GR reactions. Consequently, GR-based nanocomposites have been applied to various fields, such as catalysis, ,, biosensing, − surface-enhanced Raman scattering (SERS), ,− and electrochemical applications. , …”

“…Different nanomaterial morphologies, such as nanocubes, nanohexagonal particles, nanodendrites, , nanoparticles, , nanorods, , nanobelts, and others, − can be fabricated using GR reactions. Consequently, GR-based nanocomposites have been applied to various fields, such as catalysis, ,, biosensing, − surface-enhanced Raman scattering (SERS), ,− and electrochemical applications. , …”