Constructing synergy of sufficient hydroxyl and oxygen in PtNi/Al2O3 enables room‐temperature catalytic HCHO oxidation. Issue 3 (9th September 2022)

• Record Type: Journal Article
• Authors: Wang, Xuyu; Yang, Fu; Yi, Jianjian; Kong, Jiejing; Gong, Juanjuan; Yuan, Aihua; Rui, Zebao; Ji, Hongbing
• Is Part Of: AIChE journal. Volume 69:Issue 3(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-09
• Subjects: adsorbed species -- catalytic oxidation -- formaldehyde -- structural design -- synergistic effect; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.17895
• Languages: English
• ISSNs: 0001-1541

Abstract

Abstract: Rational engineering of noble metal/transition metal bimetallic catalysts is considered as an effective way to constructing synergistic effect between adsorbed oxygen and hydroxyl for enhanced catalytic formaldehyde oxidation. Herein, we developed a Pt–Ni bimetallic catalysts loading on γ‐Al2 O3 support for room‐temperature formaldehyde oxidation. Catalytic experiment results showed that the conversion rate was >97% with a >100 h stability. Several noble metals (Pd, Au, and Ag) were compared to identify the activity effect in formaldehyde oxidation. The activity and stability test in different atmospheres and in situ infrared test suggested that the PtNi/γ‐Al2 O3 has the best activity and stability. At a meantime, the results also demonstrated that Pt sites motivate more surface adsorbed oxygen through activating ambient oxygen molecules, while the neighboring Ni atoms contribute to adsorbed hydroxyl, thereby offering sustainable activity. The high efficiency and stability of PtNi/γ‐Al2 O3 catalysts for formaldehyde oxidation could be a promising candidate for air purification.