Tailored temperature window of CuOx/WOx-ZrO2 for NOx reduction via adjusting the calcination temperature of WOx-ZrO2

► The temperature window of catalyst is tailored by calcining the support. ► The mechanisms of tailoring the temperature window of catalyst are discussed. ► The polymerization of WOx leads to the increased Brønsted acidity of catalysts. ► The CuOx/WOx interactions are reduced by elevating calcination temperature of support.