RESEARCH / A0376
Proton Relay in Hydrogen-Bond Networks Promotes Alkaline Hydrogen Evolution Electrocatalysis
Read the original paper · 10.1021/acsnano.5c00318 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 6. Mechanistic insights. (a) Difference density map of each component on Ru/CeCoP and Ru/CoP models, where electron loss is indicated in blue and electron enrichment is indicated in red. (b) Operando XANES spectra of the Ru K-edge for the operated Ru foil, Ru/ CoP, and Ru/Ce0.027CoP catalysts at an HER potential of −0.10 V vs RHE. (c) Operando XANES spectra of the Co K-edge for the operated CoP, Ru/CoP, and Ru/Ce0.027CoP catalysts at an HER potential of −0.10 V vs RHE. Representative 5 ps AIMD simulation snapshots of water molecules in the double-layer microenvironments around (d) Ru/CeCoP and (e) Ru/CoP. (f) Density of water molecules in the X−Y plane at various Z distances from the catalysts. (g) Deconvolution of O−H stretching vibration features of in situ SEIRAS spectra recorded at −0.1 vs RHE of Ru/rGO, Ru/Ce0.027CoP, and Ru/CoP during the HER.