Sodium is typically employed as component of bases or salts for precipitating metals during preparation of oxide catalysts. It is normally eliminated during rinsing of the solid precursors. The present work shows however that standard rinsing of the solid precursor of an inverse CeO₂/CuO with water at 25 °C is ineffective for eliminating sodium from the catalyst. Post-treatment with water at 45 °C allows the practical elimination of sodium. ICP-AES chemical analysis, S_BET measurement, XRD and high resolution TEM are employed for characterization. The consequence of sodium presence is an important decrease in the CO-PROX activity, as supported by operando-DRIFTS.

钠通常用作碱或盐的组分，以在氧化物催化剂的制备过程中沉淀金属。通常在漂洗固体前体时将其消除。然而，目前的工作表明，在25°C下用水反冲洗CeO ₂ / CuO的固体前体对于从催化剂中除去钠是无效的。在45°C的水中进行后处理可实际去除钠。ICP-AES化学分析，S _BET测量，XRD和高分辨率TEM用于表征。钠的存在会导致CO-PROX活性的显着降低，如操作-DRIFTS所支持。