Fig. 4: Fine-structure characterizations of RuNi catalysts.
From: Highly-efficient RuNi single-atom alloy catalysts toward chemoselective hydrogenation of nitroarenes
a In situ CO–DRIFTS spectra of Ni/Al2O3, Ru/Al2O3, and 0.4 wt.%, 0.6 wt.%, 2 wt.% RuNi samples, within 2100−1500 cm−1 by flowing He gas for 20 min. b The enlarged and Gaussian fitting spectra with a fixed peak position and FWHM of RuNi/Al2O3 samples. c In situ Ru K-edge XANES spectra and d EXAFS Fourier–transform spectra of various samples. k2-weighted wavelet transforms for the Ru K-edge XAFS signals of e Ru foil, f 0.4 wt.% RuNi, and g RuO2 sample based on Morlet wavelets. ‘a. u.’ denotes arbitrary units.
