 Abstract formaldehyde, FA, is a common air pollutant that can be removed using transition metal oxides, TMO, based thermocatalysts. These materials have been shown to be effective at removing FA under different operating conditions, including low temperature and high temperature operations. The superiority of these composite catalysts over monometallic and bimetallic TMO catalysts is attributed to the presence of abundant surface oxygen vacancies, which enhance FA adsorption. Future research should focus on optimizing the catalyst composition and structure to maximize FA removal efficiency. This article was authored by Yong Biao Hua, Eunha Samari, and Ki Hyun Kim.