我国室内甲醛污染形势依然严峻，居民对甲醛污染的投诉仍高发频发。以常温催化氧化为核心的主动控制技术实现了在较低室温下消除甲醛。然而，甲醛氧化降解过程极具反复性，这归因于关键中间体甲醛氧化物（CH2OO）的形成转化，其存在多种同分异构体且在不同湿度下呈现出复杂的化学反应性，造成CH2OO的反应壁垒高于甲醛一次氧化。由于催化反应致使CH2OO反应速率更快和环境寿命更短，故针对其的直接测定极具困难，导致甲醛完全氧化路径和机制的研究很不充分，往往通过理论计算进行推测。本项目将率先利用步进扫描时间分辨傅里叶变换红外光谱在线测定甲醛催化氧化中CH2OO的化学组成和研究温、湿度变化对其生成、稳定和衰变的反应性的影响，旨在对现有甲醛污染研究和治理形成重要的补充和推进。本项目将以“研反应-优设计”为导向，通过阐明CH2OO关键中间体反应特征为设计优化高效甲醛催化体系提供策略支撑，致力于提升室内空气质量。

The situation of formaldehyde (HCHO) pollution in indoors is still severe in China, and the most common complaints are frequently reported in occupational HCHO exposures. Room-temperature catalytic oxidation (RCO) has become a promising approach to remove HCHO in indoor air at low room temperatures. Although HCHO has the simplest molecular composition, the complete catalytic oxidation of HCHO cannot accomplish in an action. This limitation is mostly ascribed by the production of key intermediates, namely, formaldehyde oxides (CH2OO), which have complicated and reactive isomers under various moisture levels. The ensuing conversion from CH2OO intermediates becomes more complex and difficult than that from HCHO initially. To date, making direct measurements of CH2OO intermediates in the oxidation of HCHO is challenging, instead they are roughly estimated by theoretical calculation, as they are quite reactive and have extremely short lifetime. Herein, we will make an interesting contribution to unveil the chemical speciation and reactivity of CH2OO in the HCHO catalytic oxidation using step scan time-resolved Fourier transform infrared spectroscopy for the first time, and to investigate the effects of ambient temperatures and moistures on the formation, stabilization, and decay of the CH2OO isomers. This proposed project will fill the knowledge gap in scientific research and formulating mitigation strategy for the HCHO removal. Most importantly, this project is expected to attain a research outline of probing chemical reaction towards optimizing catalyst design, as of determining the complete reactivity mechanisms and pathways of HCHO and CH2OO intermediates to provide strategic insights into rational design and CO2 selectivity enhancement of a reliable catalytic oxidation process for the improvement of indoor air quality.