Abstract
AbstractThe selective catalytic reduction of NOx with NH3 (NH3‐SCR) activity of 0.10 g/g CeO2/WO3‐ZrO2‐TiO2 (Ce/WZT) in low temperature range was greatly enhanced by the addition of 0.00010 g/g Cu (Cu/Ce mass ratio = 1:1000). The temperature of complete NOx conversion (T90) decreased as much as 36 °C (from 263 °C to 227 °C) under a gas hourly space velocity (GHSV) of 30 000 h−1. XPS, NH3/O2‐TPD, H2‐TPR, XRD, and FTIR characterizations revealed that the interaction between Cu and Ce, more active oxygen species, stronger NH3 and NO oxidation ability, better redox ability, together with the abundant Brønsted acid sites contributed to better catalytic activity of 0.00010 g/g Cu‐0.10 g/g Ce/WO3‐ZrO2‐TiO2 (CC/WZT) catalyst at low temperatures.
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