用Nb合的NiO纳米花用于酸盐电还原到氨
Ying Zhang1, Yuying Wan1, Xiaoxu Liu2
1School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
iScience
|October 9, 2023
概括
原子Nb合的NiO纳米花有效地将化物转化为氨 (NO2RR),为生产氨和减轻化物污染提供了可持续的途径. 这种催化剂为电催化还原过程实现了高选择性和活性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 化物污染对环境构成危险.
- 可持续的氨生产至关重要.
- 电催化降解化物到氨 (NO2RR) 提供了一种双重解决方案.
研究的目的:
- 为NO2RR设计和合成一种高性能催化剂.
- 调查催化机制和影响选择性和活性的因素.
主要方法:
- 合成原子Nb-dopedNiO纳米花的合成.
- 对催化剂对NO2RR的性能进行电化学表征.
- 理论计算 (例如,DFT) 来阐明反应机制.
主要成果:
- 与Nb合的NiO纳米花催化剂实现了高NH3-法拉第效率92.4%的高NH3-法拉第效率.
- 在 -0.6 V RHE下,记录了200.5 μmol h-1 cm-2的NH3产率.
- 理论计算证实,Nb剂增强了NO2−的激活,抑制了的演化.
结论:
- 原子Nb合的NiO纳米花是NO2RR的高效催化剂.
- Nb兴奋剂优化了电子结构,提高了NO2RR的选择性和活性.
- 这种方法为可持续的氨合成和酸盐修复提供了一个有希望的战略.
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