fig4
Figure 4. H2-TPR profiles (A) and UV-vis DRS spectra (B) of zeolite catalysts; (C) Simulated positions of Cu ions and alkali metals in the zeolite; NH3-SCR curves (D) and Arrhenius plots (E) of zeolite catalysts. This figure is quoted with permission from Elsevier[93]. H2-TPR: Temperature-programmed reduction of hydrogen; UV-vis: ultraviolet-visible; DRS: diffuse reflectance spectroscopy; NH3-SCR: ammonia-assisted selective catalytic reduction.
