Bimetallic Bi and Ni doped LTA zeolite as synergy electrocatalyst towards high concentration of methanol oxidation reaction. (1st March 2023)

• Record Type: Journal Article
• Authors: Qian, Kun; Fang, Fang; E, Yifeng; Xu, Yao; Tong, Xiyuan; Chen, Peng; Han, Lu; Li, Zhuozhe
• Is Part Of: International journal of hydrogen energy. Volume 48:Number 19(2023)
• Page Start: 6995
• Page End: 7003
• Publication Date: 2023-03-01
• Subjects: Composite LTA Zeolite -- Direct electrochemistry -- Methanol electrooxidation -- Non-noble metal catalyst -- Bimetallic catalyst; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.04.126
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: One of the important factors determining the expansion of the application domain of direct methanol fuel cell (DMFC) is its energy density. The bismuth-nickel doped LTA zeolite was as-synthesized in hydrothermal condition and applied into the electrochemistry catalysis of methanol oxidation reaction (MOR) with high performance in the methanol concentration ranging from 0.5 M to 35 M without observed catalyst poisoning. A trace amount of Bi and Ni atoms are highly dispersed on the opening window of the zeolitic surface by the electrochemical rearrangement process. The surface of the LTA structure zeolite is a good carrier for the metal cations with Na cations which could be replaced in hydrothermal crystalline process while the inner direct pores provide a channel for CO gas to escape and prevent catalyst poisoning in electrochemistry progress. Through the comparative study with the Bi doped LTA, Ni doped LTA and the commercial Pt/C catalyst, the Bi and Ni doped LTA reveals higher performance in monatomic catalytic efficiency and electrochemical stability. And through the mutual interaction of diatomic, the doped zeolite material highly improves the energy density of methanol fuel cells and reduces the cost of the cells concerning the absence of noble metals. Graphical abstract: In hydrothermal condition, the Bi and Ni atoms entered the LTA zeolite by substituting the Na sites. The doped Bi and Ni atoms highly dispersed on the zeolite framework. The Bi–Ni LTA zeolite was modified on glassy carbon electrode and applied into the electrochemistry progress while it revealed high activity in the MOR by diatomic synergistic catalysis. The CV and A i-t C methods revealed the reaction mechanism and confirmed the stability of the catalyst. At high methanol concentration, the catalyst maintained high activity and stability. This non noble metal composite catalyst was conducive to reducing the cost of the battery. Image 1 Highlights: In-situ synthesized Bi and Ni doped LTA zeolite catalyst with high atom dispersion. Diatomic synergy and electrochemistry method promote catalyst activity. High activity catalyst in high methanol concentration for high energy density cell. Low cost and environment protection for no precious metal.