Oxygen‐Doped γ‐Mo 2 N as High‐Performance Catalyst for Ammonia Decomposition
Source abstract
Abstract
Abstract γ‐Mo 2 N catalysts exhibit excellent activity and stability in ammonia decomposition reactions. However, the influence of oxygen on its activity is still unknown. In this work, two γ‐Mo 2 N catalysts with different oxygen content are synthesized using temperature‐programmed nitridation of α‐MoO 3 . The γ‐Mo 2 N catalysts are highly oxidized and their ammonia decomposition performance is closely related to their oxygen content. The activity of γ‐Mo 2 N with high oxygen content (HO‐γ‐Mo 2 N) is much higher, whose H 2 formation rate at 550 °C is 3.3 times higher than the γ‐Mo 2 N with low oxygen content (LO‐γ‐Mo 2 N). This is mainly attributed to two aspects: on the one hand, the higher valence state of Mo in the HO‐γ‐Mo 2 N leads to stronger Mo─NH 3 bonds, which promotes the adsorption and activation of NH 3 . On the other hand, the H generated by N─H bond breaking is more easily migrated to O, which avoids excessive H occupying the γ‐Mo 2 N active sites and alleviates the negative effect of hydrogen poisoning.
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Research context
OpenAlex topics: MXene and MAX Phase Materials · Catalysis and Hydrodesulfurization Studies · Catalytic Processes in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
School of Applied Chemistry and Engineering University of Science and Technology of China Hefei 230026 China
China‐Belarus Belt and Road joint laboratory on Advanced Materials and Manufacturing Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
Department of Chemistry Tsinghua University Beijing 100084 China
Funding
National Natural Science Foundation of China
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