Atomically dispersed Cu and Fe on N-doped carbon materials for CO(2) electroreduction: insight into the curvature effect on activity and selectivity.
Atomically dispersed Cu and Fe on N-doped carbon materials for CO(2) electroreduction: insight into the curvature effect on activity and selectivity.
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用于 CO2 电还原的 N 掺杂碳材料上原子分散的 Cu 和 Fe:深入了解曲率对活性和选择性的影响
DOI:
10.1039/d0ra08857a
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发表时间:
2020-11-23
期刊:
影响因子:
3.9
通讯作者:
Cao, Zexing
中科院分区:
文献类型:
--
作者:
Zhang, Yue;Fang, Lei;Cao, Zexing
CO2 electroreduction reaction (CO2ER) by single metal sites embedded in N-doped graphene (M@N-Gr, M = Cu and Fe) and carbon nanotubes (M@N-CNT, M = Cu and Fe) has been explored by extensive first-principles calculations in combination with the computational hydrogen electrode model. Both atomically dispersed Cu and Fe nanostructures, as the single atom catalysts (SACs), have higher selectivity towards CO2ER, compared to hydrogen evolution reduction (HER), and they can catalyze CO2ER to CO, HCOOH, and CH3OH. In comparison with Cu@N-Gr, the limiting potentials for generating CO, HCOOH, and CH3OH are reduced obviously on the high-curvature Cu@N-CNT. However, the curvature effect is less notable for the single-Fe-atom catalysts. Such discrepancies can be attributed to the d-band center changes of the single Cu and Fe sites and their different dependences on the curvature of carbon-based support materials.
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