Electrochemical tuning of Pd_100−xAu_xbimetallics towards ethanol oxidation: effect of an induced d-band center shift and oxophilicity

Abstract

Electronegative Au improves the oxidation kinetics of Pd by inducing a downshift of the d-band center and increasing the coverage of adsorbed hydroxyls.

A high-index facet gold 12 tip nanostar for an improved electrocatalytic alcohol oxidation reaction with superior CO tolerance

“…50 The current increase in the forward scan is attributed to the oxidation of freshly chemisorbed ethanol, accompanied by a slight decrease in the backward scan due to the surface oxidation of Au. 51 Subsequently, the catalytic current densities of the Au 12 tip nanostar-electrode at different scan rates were examined, ranging from 1 to 25 mV s −1 (Fig. 3B).…”

Recent Developments on Cr‐Based Electrocatalysts for the Oxygen Evolution Reaction in Alkaline Media

“…In a similar explanation, the Cr works in altering the d‐band centre of the active metal to influence OER catalysis. According to the d‐band theory, a compressive/ tensile strain induced by the introduction of an adjacent Cr can lower/ raise the d‐band centre of the active metal which in turn affects the chemisorption of OER intermediates [117–119] . Essentially, the increasing number of anti‐bonding orbitals in the d‐band of the active metal dictate the bond strength of the intermediates and products of OER.…”

“…According to the d-band theory, a compressive/ tensile strain induced by the introduction of an adjacent Cr can lower/ raise the d-band centre of the active metal which in turn affects the chemisorption of OER intermediates. [117][118][119] Essentially, the increasing number of antibonding orbitals in the d-band of the active metal dictate the bond strength of the intermediates and products of OER. However, a delicate balance of adsorption strengths of intermediates is necessary for deprotonation of H 2 O and formation of O* and OOH* radicals, at the same time not exerting too strong a bond with the intermediates.…”