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从表面等离子共振调节波长增强的光电化学细胞

Hao Yang¹, Zi-Han Wang¹, Yan-Yu Zheng¹

¹KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University , Guangzhou 510275, China.

Journal of the American Chemical Society

|December 10, 2016

概括

研究人员使用金纳米棒开发了可调节波长的光电化学细胞,用于增强光催化. 优化光波长以匹配表面等离子共振 (SPR) 峰值可以提高演变和甲醇电氧化效率.

科学领域:

材料科学
电化学
可再生能源

背景情况:

光催化为可再生能源发电提供了一个有前途的途径,许多系统都显示出可见光活动.
通过可调节的波长来提高光催化活性仍然是一个挑战.

研究的目的:

设计可调节波长增强的光电化学电池.
使用金纳米棒 (Au NRs) 控制表面等离子体共振 (SPR) 峰值,以优化光催化.

主要方法:

使用不同面积比的 Au NR 制造光电化学电池.
调整 Au NR 的 SPR 峰值以匹配特定的波长.
对演化反应 (HER) 和甲醇电氧化的光催化活性进行评估.

主要成果:

当照明波长与Au NR的SPR峰值相匹配时,可以实现HER和甲醇电氧化的最佳光催化活性.
SPR的峰值选择性表现出对照明波长的强烈依赖.
SPR峰值的蓝色偏移增强了光电催化效应,而红色偏移则促进了光热效应.

结论:

调整 Au NR 的 SPR 峰值提供了一种增强光催化活性和反应选择性的方法.
调整照明波长与SPR调整一起提供了一种提高光催化性能的策略.

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