Extended Data Fig. 5: X-ray diffraction (XRD) spectra of synthesized catalysts with different amount of Ru precursors.
From: Multi-heteroatom-doped carbon from waste-yeast biomass for sustained water splitting
a, R-1(RuSAs+RuNPs@MHC)35mg. b, R-2 (RuSAs+RuNPs@MHC)40mg. c, R-3 (RuNPs@MHC)45mg. For each spectrum, all diffraction peaks at 38.4°, 42.2°, 44.0°, 58.3°, 69.4°, 78.4°, and 84.7° correspond to the (100), (002), (101), (102), (110), (103), and (112) planes of a hexagonal-close packed (hcp) Ru crystal (JCPDS 03-065-7646). It confirms that the hcp Ru crystal structure remains unaffected after using the various amount of Ru precursors. However, the peak shape is strongly affected by Ru precursors. When we used a higher amount of Ru precursor (R-3), the peak broadening decreases and the sharpness of the peak increases, indicative of increase in crystallite size.
