在组-VIB金属合剂Ag3PO4中的协调结构调制增加了N2到NH3的电催化转换的活性位点密度
Ashmita Biswas1, Mamta Devi Sharma1, Samadhan Kapse2
1Institute of Nano Science and Technology, Sector-81, Mohali, Punjab, 140306, India.
Small (Weinheim an der Bergstrasse, Germany)
|June 20, 2024
概括
用基合银酸盐 (Ag3PO4) 增强电化学降解反应 (NRR) 的活性位点. 这种策略通过抑制的演变来实现高氨生产效率.
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
- 催化剂是一种催化剂.
背景情况:
- 电化学降解反应 (NRR) 对氨合成至关重要.
- 通过兴奋剂进行材料工程是一种增强NRR活性位点的有希望的策略.
- 识别和优化活性位点是提高催化剂性能的关键.
研究的目的:
- 调查兴奋剂组VIB金属对Ag3PO4对增强NRR的影响.
- 了解d-p轨道混合和格子应变在操纵活性位点中的作用.
- 为了确定高性能NRR的最有效的剂.
主要方法:
- 密度函数理论 (DFT) 对电荷密度部署的计算.
- 定子灭绝终身研究 (PALS) 用于空缺量化.
- 旋转环盘电极 (RRDE) 用于运动研究.
- 在现场减弱总反射-红外光谱 (ATR-IR) 用于中间识别.
主要成果:
- (Mo) 兴奋剂被确定为最有效的,导致最小的NRR过度潜力.
- 在Ag3PO4网格中,Mo注引发了压力应变和氧气空缺.
- 观察到侧面N2吸附和完全转化为NH3.
- 氧气空缺充当了质子吸尘器,抑制了的进化.
结论:
- 化剂Ag3PO4 (Mo/Ag3PO4-10) 显示出对电化学NRR的优越性能.
- 优化的活性位点促进了高法拉第效率 (54.8%) 的高效的N2降解为NH3.
- 这种兴奋剂策略为开发高效和选择性的氨合成催化剂提供了一条途径.
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