fig3

Promoting effect of hydroxyl groups on the CO-SCR activity of Ir-Mo bimetallic catalysts under O<sub>2</sub> and SO<sub>2</sub>

Figure 3. Ir 4f XPS spectra of (A) Ir-Mo@Z5 and (B) Ir-Mo/Z5 catalysts. XPS: X-ray photoelectron spectroscopy‌.