Single-Atom Doped Fullerene (MN<sub>4</sub>–C<sub>54</sub>) as Bifunctional Catalysts for the Oxygen Reduction and Oxygen Evolution Reactions
Development of high-performance oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts is crucial to realizing the electrolytic water cycle. C<sub>60</sub> is an ideal substrate material for single atom catalysts (SACs) due to its unique electron-withdrawing proper...
محفوظ في:
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , , , , , |
| منشور في: |
2024
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| الموضوعات: | |
| الوسوم: |
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| الملخص: | Development of high-performance oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts is crucial to realizing the electrolytic water cycle. C<sub>60</sub> is an ideal substrate material for single atom catalysts (SACs) due to its unique electron-withdrawing properties and spherical structure. In this work, we screened for a novel single-atom catalyst based on C<sub>60</sub>, which anchored transition metal atoms in the C<sub>60</sub> molecule by coordination with N atoms. Through first-principles calculations, we evaluated the stability and activity of MN<sub>4</sub>–C<sub>54</sub> (M = Fe, Co, Ni, Cu, Rh, Ru, Pd, Ag, Pt, Ir, Au). The results indicate that CuN<sub>4</sub>–C<sub>54</sub>, which is based only on earth-abundant elements, exhibited low overpotentials of 0.46 and 0.47 V for the OER and ORR, respectively, and was considered a promising bifunctional catalyst, showing better performance than the noble-metal ones. In addition, according to the linear relationship of intermediates, we established volcano plots to describe the activity trends of the OER and ORR on MN<sub>4</sub>–C<sub>54</sub>. Finally, d-band center and crystal orbital Hamiltonian populations methods were used to explain the catalytic origin. Suitable d-band centers lead to moderate adsorption strength, further leading to good catalytic performances. |
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