CaMoO₄ catalyst was synthesized by a facile method. The original and calcined catalysts were characterized by a variety of techniques. The acidity of the catalysts was studied and correlated with the catalytic activity. The obtained results clearly revealed that CaMoO₄ was an active and selective catalyst towards the formation of anhydrous formaldehyde. The highest conversion of methanol and yield of formaldehyde obtained were 100 and 98 %, respectively. In addition, the moderate strength of Brønsted acid sites created on the surface of catalyst plays the main role in the formation of formaldehyde. Finally, the CaMoO₄ catalyst exhibited a remarkable stability.

通过简便的方法合成了CaMoO ₄催化剂。原始和煅烧的催化剂通过多种技术进行了表征。研究了催化剂的酸度，并将其与催化活性相关联。所获得的结果清楚地表明，CaMoO ₄是形成无水甲醛的活性和选择性催化剂。所获得的最高甲醇转化率和甲醛产率分别为100％和98％。此外，在催化剂表面产生的布朗斯台德酸位适中的强度在甲醛的形成中起主要作用。最后，CaMoO ₄催化剂表现出显着的稳定性。