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High-efficiency CO2 electroreduction on molybdenene: a comparative study using fixed-charge and fixed-potential
Song Yu1,2, Huajian Pan2,3, Xinzhuo Zhou1,2
1College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China.
Nanoscale
|April 29, 2025
Summary
Molybdenene shows promise as a catalyst for electrochemical carbon dioxide reduction reaction (CO2RR), efficiently converting CO2 into methane with low overpotentials. This emerging material offers a high-performance alternative for sustainable fuel production.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Electrochemical conversion of renewable energy is crucial for addressing energy and environmental challenges.
- Current carbon dioxide reduction reaction (CO2RR) catalysts suffer from high overpotentials and poor selectivity.
- Metallenes, like molybdenene, offer structural advantages and abundant active sites for enhanced catalytic performance.
Purpose of the Study:
- To evaluate molybdenene as a potential electrocatalyst for the CO2RR.
- To investigate the CO2 activation and reaction pathways on molybdenene.
- To assess the catalytic activity and selectivity of molybdenene for methane production.
Main Methods:
- Employed three computational methods: fixed-charge method (FCM) without solvent effect, FCM with solvent effect, and fixed-potential method (FPM).
- Analyzed CO2 adsorption and activation mechanisms on the molybdenene surface.
- Calculated reaction pathways and overpotentials for CO2 reduction to methane.
Main Results:
- Molybdenene inherently captures and activates CO2 due to surplus surface electrons, demonstrating high activity.
- The material exhibits high selectivity towards methane (CH4) production.
- The optimal reaction pathway shows a low overpotential of 0.68 V, outperforming Cu(211).
Conclusions:
- Molybdenene is a promising emerging material for high-efficiency CO2RR electrocatalysis.
- Its unique electronic structure facilitates CO2 activation and selective conversion.
- Further theoretical and practical exploration of molybdenene for CO2RR is warranted.
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