Figure 4
(a) Normalized Co K-edge XANES spectra for the Co–Mo/Al2O3 catalyst at various reaction temperatures and under an atmosphere of 10% H2S/H2; (b) inset of (a) around the pre-edge region. (c) Normalized Co K-edge XANES spectra for the Co-Ni-Mo/Al2O3 catalyst at various reaction temperatures and under an atmosphere of 10% H2S/H2; (d) inset of (c) around the pre-edge region. |