Fig. 4: Operando XANES spectroscopy measurement results.
From: Electrocatalytic hydrogenation of acetonitrile to ethylamine in acid
a The schematic illustration of operando XANES electrolytic cell. Potential dependence of operando EXAFS spectra of Pd K-edge in 0.5 M H2SO4 solution (b) and 8 wt% acetonitrile in 0.5 M H2SO4 solution (c). d Potential dependence of operando Pd K-edge XANES spectra of the catalyst in 0.5 M H2SO4 solution and after the addition of 8 wt% MeCN at +0.2 and −0.5 V vs. RHE. e Charge density difference plot for H9O4 and MeCN adsorbed on Pd and PdH. Charge accumulation and depletion regions are shown in purple and yellow, respectively, with an iso-surface value of 0.005 e Å−3. Red numbers in top right corner show Bader charge transfer from the molecular to the Pd sites.
