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Direct electrochemical N2 oxidation to nitrate on supportive Pt/CeO2
Ying Zhang1, Yabing Shang1, Ming Cheng1
1Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, Shandong 266580, China.
Chemical Communications (Cambridge, England)
|November 26, 2024
Summary
We developed an efficient platinum on cerium dioxide (Pt/CeO2) catalyst for electrocatalytic nitrogen (N2) oxidation to nitrate. This catalyst enhances N2 adsorption and suppresses competing reactions, leading to improved performance.
Area of Science:
- Electrochemistry
- Catalysis
- Materials Science
Background:
- Electrocatalytic nitrogen (N2) oxidation to nitrate is a promising route for sustainable nitrogen fixation.
- Developing efficient and selective catalysts is crucial for this process.
Purpose of the Study:
- To develop an efficient platinum on cerium dioxide (Pt/CeO2) catalyst for electrocatalytic N2 oxidation to nitrate.
- To investigate the role of catalyst structure and composition in enhancing electrocatalytic performance.
Main Methods:
- Synthesis of cerium dioxide nanocubes (CeO2 NCs).
- Deposition of highly dispersed platinum (Pt) nanoparticles onto CeO2 NCs.
- Electrocatalytic testing for N2 oxidation to nitrate.
- Characterization using techniques like X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy.
Main Results:
- The Pt/CeO2 catalyst demonstrated significantly enhanced electrocatalytic N2 oxidation to nitrate performance.
- Characterization revealed strong interactions between highly dispersed Pt and oxygen vacancies in CeO2 NCs.
- These interactions promoted N2 adsorption and suppressed competing oxygen evolution reaction (OER) activity.
Conclusions:
- The developed Pt/CeO2 catalyst is highly efficient for electrocatalytic N2 oxidation to nitrate.
- The synergistic effect between Pt and CeO2 oxygen vacancies is key to the enhanced performance.
- This work offers a promising strategy for designing advanced catalysts for nitrogen fixation.
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