Platinum-Tin Oxide Core–Shell Catalysts for Efficient Electro-Oxidation of Ethanol

Abstract

Platinum-tin (Pt/Sn) binary nanoparticles are active electrocatalysts for the ethanol oxidation reaction (EOR), but inactive for splitting the C-C bond of ethanol to CO2. Here we studied detailed structure properties of Pt/Sn catalysts for the EOR, especially CO2 generation in situ using a CO2 microelectrode. We found that composition and crystalline structure of the tin element played important roles in the CO2 generation: non-alloyed Pt46-(SnO2)54 core-shell particles demonstrated a strong capability for C-C bond breaking of ethanol than pure Pt and intermetallic Pt/Sn, showing 4.1 times higher CO2 peak partial pressure generated from EOR than commercial Pt/C.

Effects of heat treatment atmosphere on the structure and activity of Pt3Sn nanoparticle electrocatalysts: a characterisation case study

“…However, a set of obvious diffraction peaks from SnO 2 were also found by Lim et al over the entire composition range explored. The "XRD amorphous" SnO 2 implied from Colmati's study is not a unique case in the literature and can also be found in studies of Pt-SnO 2 core-shell structures 29 and, more commonly, for catalysts with a low Sn content.…”

Palladium Nanoparticles Anchored on Anatase Titanium Dioxide‐Black Phosphorus Hybrids with Heterointerfaces: Highly Electroactive and Durable Catalysts for Ethanol Electrooxidation

“…This result can be explained by the contribution of the ATN-BP support to the generation of oxygenated species (e.g., OH ad ) for accelerating the oxidation of the reaction intermediates adsorbed on the Pd sites, in accordance with increase in ECSA CO . [57,58] To further evaluate the stability of the Pd/ATN-BP catalyst, chronoamperometric curves were obtained in 1 m NaOH and 1 m EtOH solution at a constant potential of 0.2 V versus for 3600 s. As observed in Figure 8e,f, the Pd/ATN-BP-20% catalysts exhibit higher initial and final current densities than the other Pd-based catalyst, indicating that the Pd/ATN-BP catalyst had the highest electrochemical activity in the EOR. The current density of the EOR on all the Pd-based catalysts decreased sharply within the first 5 min, which is possibly due to the formation of Pd oxides.…”

Advances in Ceramic Supports for Polymer Electrolyte Fuel Cells

“…Pt and Pd supported on SnO2 were investigated as catalyst systems for various chemical reactions, such as the low temperature oxidation of CO and methane [67], the reduction of NOxs [68], and the electro-oxidation of alcoholic fuels [69,70]. Indeed, pure tin dioxide is a wide band gap semiconductor with electrical conductivity varying from 0.1 to 10 −6 S/cm.…”