Liu Jianye, Chen Wenbin, He Taihe, Fang Yiwen, Zhong ZiYi, Wang Xiaoming, Li Zhen, Song Yibing
Department of Chemistry, Shantou University Guangdong 515063 China
Department of Chemistry Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT) Guangdong 515063 China.
RSC Adv. 2022 Apr 26;12(20):12537-12543. doi: 10.1039/d2ra00538g. eCollection 2022 Apr 22.
Formaldehyde (HCHO) oxidation to improve indoor air quality has attracted extensive attention. Designing efficient catalysts for HCHO removal at room temperature still remains challenging. Herein, we report a novel strategy to boost HCHO oxidation by the synergistic effect of Pt nanoparticles and CN. The pyridine nitrogen of CN can create Lewis base sites, which function in adsorbing and activating O molecules. As the preparation temperature increased, the pyridine nitrogen content increased on the CN surface, leading to a more significant synergistic effect. The mechanism study by DRIFTS indicated that the adsorbed O molecules were activated by Pt/CN. As a result, the Pt/CN-650 has the most outstanding performance for HCHO oxidation at room temperature. HCHO can be completely eliminated with a concentration of 80 ppm at room temperature at a GHSV of 50 000 ml g h. This study will provide a new perspective to design efficient HCHO oxidation catalysts.
通过甲醛（HCHO）氧化来改善室内空气质量已引起广泛关注。设计用于在室温下去除HCHO的高效催化剂仍然具有挑战性。在此，我们报道了一种通过Pt纳米颗粒与CN的协同作用来促进HCHO氧化的新策略。CN的吡啶氮可以产生路易斯碱位点，其作用是吸附和活化O分子。随着制备温度的升高，CN表面的吡啶氮含量增加，导致更显著的协同效应。通过漫反射红外傅里叶变换光谱（DRIFTS）进行的机理研究表明，吸附的O分子被Pt/CN活化。结果，Pt/CN-650在室温下对HCHO氧化具有最出色的性能。在50 000 ml g h的气体时空速（GHSV）下，室温下80 ppm浓度的HCHO可被完全消除。该研究将为设计高效的HCHO氧化催化剂提供新的视角。
