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Universal synthesis of SiO x /Co–N–C and SiO x /Ni–N–C. a,b) SEM images of SiO x /Co–N–C; c,d) SEM images of SiO x /Ni–N–C; e,f) HAADF‐STEM images of SiO x /Co–N–C; g,h) HAADF‐STEM images of SiO x /Ni–N–C; i,j) XANES and FT‐EXAFS analysis of SiO x /Co–N–C, reference Co foil and CoPc; k,l) XANES and FT‐EXAFS results of the SiO x /Ni–N–C sample, reference Ni foil and NiPc.
