在基Ti3C2MXenes电催化剂中揭示了表面终结和配置之间的协同作用,用于降解反应
Ling Meng1, Francesc Viñes1, Francesc Illas1
1Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain.
ACS catalysis
|October 24, 2024
概括
含的MXene催化剂在降解反应 (NRR) 中表现有前途. 在混合氧/基表面上吸附的原子达到较低的限制电位,优于其他催化剂.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 计算化学计算化学
背景情况:
- MXenes,特别是Ti3C2,正在成为有前途的电催化剂.
- 对于产生氨的降解反应 (NRR) 需要有效的催化剂.
- 了解剂和表面终结的作用对于催化剂设计至关重要.
研究的目的:
- 为了研究含的Ti3C2 MXenes对NRR的催化性能.
- 评估替代和吸附对催化活性的影响.
- 考虑竞争性进化反应 (HER) 并优化NRR选择性.
主要方法:
- 使用密度函数理论 (DFT) 的计算.
- 现实的模型包括具有混合 -O/-OH表面结尾的替代和吸附.
- 演化反应 (HER) 被认为是一种竞争反应途径.
主要成果:
- 替代和低坐标吸附原子显示出高的N2吸附能力.
- 吸附的原子显著降低了NRR的限制潜力.
- 混合 -O/-OH表面组进一步降低了化能源成本,提高了NRR.
- 一个中度的 -OH 终结模型与吸附的 B 显示了最低的限制潜力 (-0.83 V),与 Ru 和 HER 竞争.
结论:
- 的结合和特定的表面终端是提高MXene NRR性能的关键.
- 在混合 -O/-OH终结的Ti3C2 MXenes上吸附的原子是有效的NRR电催化剂.
- 这项研究为设计用于氨合成的先进的MXene基催化剂提供了宝贵的见解.
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