Facile aqueous phase synthesis of 3D-netlike Pd–Rh nanocatalysts for methanol oxidation

Palladium Nanoparticle-Modified Carbon Spheres @ Molybdenum Disulfide Core-Shell Composite for Electrochemically Detecting Quercetin

“…The Mo 3d spectrum exhibited two contributions, Mo 3d 5/2 and Mo 3d 3/2 of Mo 4+ , located at 229.6 and 233.2 eV, respectively, and the peak at 226.1 eV correspond to the S 2s in Figure 3C [35]. Two binding energy peaks located at 340.5 eV and 335.3 eV, shown in Figure 3D, belong to the characteristic peaks of Pd [36]. The results also indicate that Cs@MoS 2 -Pd NPs had been successfully prepared.…”

Bifunctional Pd@RhPd Core–Shell Nanodendrites for Methanol Electrolysis

“…In the backdrop of well-established alkaline water electrolysis, the efficient electrochemical H 2 production has been achieved by optimizing the composition and structure of noble/non-noble metal-based electrocatalysts. − In water electrolysis, however, a large amount of electric energy is forced to be consumed to drive the oxygen evolution reaction (OER) at the anode due to its high theoretical voltage (1.23 V) and big overpotential. − Even if iridium- or ruthenium-based materials with remarkable activity are used as the OER electrode for water electrolysis, an overall voltage greater than 1.5 V is still required to achieve H 2 production at 10 mA cm –2 current density. , Considering that OER only provides electrons for the electrolytic circuit, adding small organic molecules that are more easily oxidized than water in the electrolyte can certainly achieve the reduction of anode potential. − Inspired by direct methanol fuel cells and the chemical methanol reforming, replacing OER with methanol electrooxidation (methanol electrolysis) has proven to be a promising strategy to reduce the total electrolysis voltage for electrochemical H 2 production. − Methanol with the merits of low price, high theoretical energy density, abundant resource, and good solubility is a renewable biomass energy, − and its theoretical oxidation potential is only 0.016 V. , Platinum- and palladium (Pd)-based nanostructures are currently the best electrocatalysts for the methanol oxidation reaction (MOR). − Thereinto, Pd has a stronger antipoisoning ability with respect to Pt for MOR, which stimulates the emergence of many advanced Pd-based MOR electrocatalysts. , Although high MOR current can be achieved on Pd electrocatalysts, the overpotential of MOR at the oxidation peak position is typically as high as approximately 0.8–0.9 V. , To develop MOR-boosted water electrolysis (i.e., methanol electrolysis), it is essential to fabricate robust electrocatalysts that can significantly reduce the overpotential of MOR.…”

“…34−37 Thereinto, Pd has a stronger antipoisoning ability with respect to Pt for MOR, which stimulates the emergence of many advanced Pd-based MOR electrocatalysts. 38,39 Although high MOR current can be achieved on Pd electrocatalysts, the overpotential of MOR at the oxidation peak position is typically as high as approximately 0.8−0.9 V. 40,41 To develop MOR-boosted water electrolysis (i.e., methanol electrolysis), it is essential to fabricate robust electrocatalysts that can significantly reduce the overpotential of MOR.…”

Ultrathin rhodium nanosheet–gold nanowire nanocomposites for alkaline methanol oxidation reaction

“…Nanostructured rhodium (Rh) with superior electrocatalytic properties has recently received increasing research attention towards the MOR in alkaline media and demonstrated higher MOR activity with lower overpotentials than Pt and enhanced CO tolerance. [14][15][16][17][18][19][20][21] The oxophilic nature of Rh favors the formation of adsorbed oxygen-containing species (OH ad ), which helps with the oxidation and removal of the adsorbed CO at low applied potentials. To further improve the MOR performance, while reducing the usage of Rh, various Rh nanostructures have been rationally designed and successfully synthesized to expose the most active Rh sites on the surface, including one-dimensional 15,16 (1D) Rh nanowires 17,18 (NWs), two-dimensional 22 (2D) Rh nanosheets 20 (NSs) and three-dimensional 19,21 (3D) Rh nanodendrites.…”