ZnGa2-AlO4 (x = 0 ≤ 2) 旋转用于持续光发射和HER/OER双功能催化
Reshmi Thekke Parayil1,2, Santosh K Gupta1,2, Manodip Pal3
1Radiochemistry Division, Bhabha Atomic Research Centre Trombay Mumbai 400085 India santoshg@barc.gov.in.
RSC advances
|October 26, 2023
概括
这项研究合成了ZnGa2-xAlxO4螺旋体,通过Al/Ga比率调节来增强其性能. 这些材料显示出有希望的氧和演化反应的双功能电催化,以及蓝色发光.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 纳米技术 纳米技术
背景情况:
- 脊柱材料对于能源应用至关重要,但其活性和导电性较差.
- 通过B位调制的缺陷工程提供了一种增强旋转特性的策略.
- 了解结构-属性关系是优化spinel性能的关键.
研究的目的:
- 为了合成ZnGa2-xAlxO4螺旋体,具有不同的Ga/Al比率.
- 为了研究合金对发光和电催化性能的影响.
- 探索这些旋在光电子和电催化应用中的潜力.
主要方法:
- 无溶剂固态反应用于螺旋合成.
- 光发光量收益率 (PLQY) 和持久发光量测量.
- 对氧演化反应 (OER) 和演化反应 (HER) 的电催化活性测试.
- 用X射线光电子光谱 (XPS) 和正子灭绝寿命光谱 (PALS) 进行缺陷分析.
主要成果:
- ZnGa2O4 呈现出蓝色发光 (13% PLQY) 和 ~ 60 分钟的持续发射.
- 由于浅陷灭,Al3+的加入并没有改善发光寿命.
- 合成的螺旋显示出双功能OER和HER的电催化活性.
- 混合的Al/Ga螺旋体显示了增强的氧空缺,改善了OER/HER的性能.
- ZnGa1.75Al0.25O4显示出优异的OER活性;ZnGa1Al1O4显示出对HER的~90%的法拉达效率.
结论:
- 调节ZnGa2-xAlxO4旋转器中的Al/Ga比,可以实现多功能应用.
- 通过Al/Ga替代进行缺陷工程是有效增强电催化性能.
- 这些螺旋为集成的光电子和电催化器件提供了一个有前途的平台.
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