作为具有宽可见光吸收带的水分光电极的SrNbO2N
Kazuhiko Maeda1, Masanobu Higashi, Bhavin Siritanaratkul
1Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Journal of the American Chemical Society
|July 21, 2011
概括
和氧化 (SrNbO(2) N) 显示出光电化学水分解的前景. 这种半导体在没有外部电压的情况下在可见光下产生光电流,使和氧产生.
科学领域:
- 材料科学 材料科学 材料科学
- 摄影化学的使用.
- 电化学 电化学 电化学
背景情况:
- 有效的水分离对于可再生能源至关重要.
- 开发利用可见光的光电极是一个关键的挑战.
- 石氧化 (SrNbO(2) N) 是光催化的一种新兴材料.
研究的目的:
- 为了研究SrNbO(2) N作为水分裂的光电极.
- 在中性水溶液中在可见光下评估其性能.
- 为了证明高效的水氧化和H(2) / O(2) 演变.
主要方法:
- 在氧化 (FTO) 玻璃上涂覆SrNbO(2) N颗粒.
- 在可见光照射下描述光电极的特性.
- 测量光电流和气体演变与或没有应用潜力.
- 使用氧化 (IrO(2)) 作为水氧化促进剂.
主要成果:
- SrNbO ((2) N (带间距约1.8 eV) 作为n型半导体起作用.
- 在可见光下 (高达700nm) 观察到阳极光流,表明水的氧化.
- 通过IrO2) 修饰和应用电位 (+1.0-1.55V与RHE) 实现了近乎立体测量的H2和O2演变.
- 该材料在没有外部电压的情况下产生光电流.
结论:
- SrNbO ((2) N是一种可行的光电极材料,用于可见光水分裂.
- 这项研究展示了第一个使用带间隙<2.0 eV的n型半导体进行光电化学分水的方法,没有外部电位.
- 这些发现为高效的太阳能燃料生产开辟了新的途径.
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