Helical PdPtAu nanowires bounded with high-index facets selectively switch the pathway of ethanol electrooxidation

Abstract

Intensive studies have been devoted to the preparation of electrocatalysts with outstanding activity and stability for ethanol oxidation. However, the electrocatalytic efficiency is far from satisfactory for application due to...

Controllable Synthesis of PtIrCu Ternary Alloy Ultrathin Nanowires for Enhanced Ethanol Electrooxidation

“…The current density of UNWs augments with increasing iridium atoms, which is in agreement with the previous report. 35 The mass activity of the Pt 43 Ir 32 Cu 25 UNWs is 1.05 A mg −1 , which is 1.3, 1.5, and 2.7 times higher than that 4,5 The enhanced electrocatalytic performance of UNWs can be ascribed to the synergistic effect of the alloy and the 1D nanostructures with high-density defect sites. As for breaking C−H and O−H bonds, Pt is considered to the best catalyst.…”

“…Many studies have shown that the EOR in the C 1 pathway, achieving maximum energy conversion, suffers from the slow reaction kinetics because the oxidation process involves the breaking of C–H and O–H bonds, splitting of the C–C bond in CH 3 CH 2 OH, and the poisoning of CO ads . , The enhanced electrocatalytic performance of UNWs can be ascribed to the synergistic effect of the alloy and the 1D nanostructures with high-density defect sites. As for breaking C–H and O–H bonds, Pt is considered to the best catalyst.…”

“…1−3 Ethanol is a liquid fuel at room temperature and has the advantages of high theoretical energy density (8.3 kW h/kg), easy storage, transportation, low toxicity, and renewability from biomass. 4,5 Therefore, DEFCs have gained considerable attention in the past decades. Nevertheless, the oxidation of ethanol at the anode usually suffers from sluggish kinetics, inefficient oxidation, and intermedium poisons on electrocatalysts, which hamper the applications of DEFCs in the practical fuel cell.…”

“…Direct ethanol fuel cells (DEFCs), portable power sources for transportation, possess lower infrastructure and operational cost and higher mass energy density due to the properties of ethanol. − Ethanol is a liquid fuel at room temperature and has the advantages of high theoretical energy density (8.3 kW h/kg), easy storage, transportation, low toxicity, and renewability from biomass. , Therefore, DEFCs have gained considerable attention in the past decades. Nevertheless, the oxidation of ethanol at the anode usually suffers from sluggish kinetics, inefficient oxidation, and intermedium poisons on electrocatalysts, which hamper the applications of DEFCs in the practical fuel cell. , Unfortunately, ethanol is often catalyzed to acetic acid by a four-electron (4e) pathway, resulting in very low fuel utilization efficiency (3–20%) .…”

Ultrafine PdAgAu alloy nanowires for ethanol oxidation electrocatalysis

“…[10][11][12] At present, Pd-based nanomaterials are considered as one of the most effective EOR catalysts with excellent catalytic activity. [13][14][15][16][17][18][19] Nevertheless, the carbonaceous intermediates produced during the EOR will be adsorbed on the surface of Pd-based catalysts, which will reduce the catalytic performance. [20][21][22][23] Therefore, the development of durable Pd-based catalysts with high activity and efficiency is very important for the EOR.…”