Reduction of carbon dioxide to methane and ethanol on the surface of graphyne-like boron nitride (BNyen) monolayer: A DFT study

被引:0
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作者
Saadh, Mohamed J. [1 ]
Mahal, Ahmed [2 ]
Tawfiq, Maha Mohammed [3 ]
Hussein, Abbas Hameed Abdul [4 ]
Mansoor, Aseel Salah [5 ]
Radi, Usama Kadem [6 ]
Obaidullah, Ahmad J. [7 ]
Singh, Parminder [8 ]
Elawady, Ahmed [9 ]
机构
[1] Faculty of Pharmacy, Middle East University, Amman,11831, Jordan
[2] Department of Medical Biochemical Analysis, College of Health Technology, Cihan University-Erbil, Kurdistan Region, Erbil, Iraq
[3] Department of Optics Techniques, Health and Medical Techniques College, Alnoor University, Mosul, Iraq
[4] Research Center, Ahl Al-Bayt University, Kerbala, Iraq
[5] Research Center, Gilgamesh Ahliya University, Baghdad, Iraq
[6] Collage of Pharmacy, National University of Science and Technology, Dhi Qar, 64001, Iraq
[7] Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P. O. Box 2457, Riyadh,11451, Saudi Arabia
[8] Centre for Research Impact & Outcome, Chitkara University Institute of Engineering and Technology, Chitkara University, Punjab, Rajpura,140401, India
[9] College of Technical Engineering, The Islamic University, Najaf, Iraq
关键词
Carbon dioxide - Gibbs free energy - Monolayers;
D O I
10.1016/j.jpcs.2024.112380
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摘要
Recently, scientists have created a novel type of boron nitride material known as BNyen. This material is similar in structure to Graphyne and has a higher N:B ratio than traditional boron nitride due to the addition of boron and nitrogen connecting segments within its units. This material has been studied for its potential as a photocatalyst for reduction of CO2 using DFT approaches. Optical and electronic attributes of BNyen suggest that it has a wider visible-light range and a band gap of 5.69 eV. By adding boron to BNyen, patial distributions of LUMO and HOMO indicate that π network has been extended, resulting in significantly greater photocatalytic efficiency. Upon the adsorption of CO2 on BNyen monolayer, the band gap significantly decreases, indicating a strong interaction between the BNyen and CO2. DFT computations were employed to explore the mechanism of CO2 reduction to a single carbon product catalyzed by BNyen. Based on the ΔG values, the optimized pathway for this reduction is from CO2 to CH4. Additionally, the potential formation of di-carbon products was considered, and based on the free energy values, CH3CH2OH is identified as the final di-carbon product. The Gibbs free energies for potential CO2 reaction pathways on BNyen were calculated, revealing that CO2 can be reduced to CH4 with a low limiting potential of −0.37 V and to CH3CH2OH with a low limiting potential of −0.57 V, both processes being powered by solar energy. In CO2RR, the competing hydrogen evolution reaction (HER) must be considered. The free energy of HER (ΔG = 0.96 eV) is significantly higher than the ΔG of the rate-determining steps for the mono-carbon product (0.37 eV) and the di-carbon product (0.57 eV) on BNyen. Therefore, BNyen effectively suppresses HER during the CO2RR process. This research can serve as a valuable guide for developing novel types of BNyen as appropriate photocatalysts for CO2 reduction reactions (CO2RR). © 2024 Elsevier Ltd
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