Ethanol Oxidation via 12‐Electron Pathway on Spiky Au@AuPd Nanoparticles Assisted by Near‐Infrared Light

Abstract

solution containing 0.5 m ethanol, which is about 158 times higher than that of commercial Pd/C catalysts (0.21 A mg pd −1 ) and is better than those of the state-of-the-art Pd-based catalysts reported in literature thus far, to the best of our knowledge. Moreover, their highest mass activity can be further improved to 118.3 A mg pd −1 in the 1.5 m KOH solution containing 1.25 m ethanol.

Surface-plasmon-enhanced ethanol electrocatalysis and enhancement mechanism of nanoporous AuPd with wide-spectrum response characteristics under visible light irradiation

“…Catalytic activity has been shown to be highly temperature dependent. [66][67][68] Therefore, the increase in the catalytic activity came from the contribution of the direct increase in the electrolyte temperature due to the wide-wavelength light (the direct heat effect), the plasmon-induced thermal effect (photothermal effect), and the hot-carrier effect (photoelectric effect). 68 To further distinguish the three effects during the plasmonenhanced EOR, we systematically investigated the dependence of the catalytic activity on the temperature without light irradiation.…”

“…The remaining hot h + state of the Au atom will oxidize OH − into hydroxyl radicals (cOH) with strong oxidation activity, [83][84][85] which promotes ethanol electrocatalysis, especially the oxidation of the toxic carbon-containing intermediate species on the surface of the NP AuPd. 68,86 Therefore, the catalytic performance of the NP AuPd catalyst is substantially improved.…”

“…Catalytic activity has been shown to be highly temperature dependent. 66–68 Therefore, the increase in the catalytic activity came from the contribution of the direct increase in the electrolyte temperature due to the wide-wavelength light (the direct heat effect), the plasmon-induced thermal effect (photothermal effect), and the hot-carrier effect (photoelectric effect). 68…”

Metallic Heterostructures for Plasmon‐Enhanced Electrocatalysis

“…In general, a catalytic reaction may undergo multi‐pathway to produce main products and other byproducts. With the assistance of LSPR excitation, the high selectivity of a specific reaction pathway for target products could be achieved [72] . In plasmon‐enhanced electrocatalytic reaction, charge transfer mechanism is utilized to improve the selectivity of catalytic reduction, through the adsorbate orbital selectivity in the indirect charge transfer mechanism or selectively interact with specific reaction intermediates in the direct charge transfer mechanism [8b,16,73] .…”

“…With the assistance of LSPR excitation, the high selectivity of a specific reaction pathway for target products could be achieved. [72] In plasmon-enhanced electrocatalytic reaction, charge transfer mechanism is utilized to improve the selectivity of catalytic reduction, through the adsorbate orbital selectivity in the indirect charge transfer mechanism or selectively interact with specific reaction intermediates in the direct charge transfer mechanism. [8b,16,73] Thus, photogenerated charge carriers by LSPR excitation could activate specific reaction pathways through modulation of the binding energy of reactants, intermediates, and products on catalytic surfaces in heterostructures.…”