Ultrathin graphitic C3N4 nanosheet as a promising visible-light-activated support for boosting photoelectrocatalytic methanol oxidation
Ultrathin graphitic C3N4 nanosheet as a promising visible-light-activated support for boosting photoelectrocatalytic methanol oxidation
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超薄石墨 C3N4 纳米片作为一种有前景的可见光激活载体，可促进光电催化甲醇氧化
DOI：
10.1016/j.apcatb.2016.10.012
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Yukou Du
中科院分区：
文献类型：
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作者：
Mingshan Zhu;Chunyang Zhai;Mingjuan Sun;Yufang Hu;Bo Yan;Yukou Du
本文以超薄二维(2D)g-C3N4纳米薄片为载体，制备了超小的铂纳米团簇。铂纳米团簇的平均尺寸约为3.2 nm。首先，与未修饰的铂纳米颗粒相比，所制备的铂/g-C3N4修饰电极对甲醇氧化反应(MOR)具有更强的电催化能力。此外，当该电极在可见光照射下时，与传统的常温电催化氧化相比，可以明显地观察到更高的MOR性能。这是由于光催化和电催化MOR的协同效应以及铂/g-C3N4中有效的界面电荷转移所致。这些结果表明，二维超薄g-C3N4纳米片在太阳能和化学能转换领域具有广阔的应用前景，也为直接甲醇燃料电池中新型可见光响应电极的开发提供了新的思路。
In this paper, ultrathin two dimensional (2D) g-C3N4nanosheet worked as support for the deposition of ultrasmall Pt nanoclusters. The average size of Pt nanocluster is about 3.2 nm. Firstly, the as-prepared Pt/g-C3N4modified electrode exhibited enhanced electrocatalytic ability in methanol oxidation reaction (MOR) compared to bare Pt nanoparticles. Moreover, when this electrode was upon visible light irradiation, higher performance of MOR was clearly observed compared to the traditional ambient electrocatalytic oxidation. This is owing to the synergistic effects of photocatalytic and electrocatalytic MOR together with the efficient interfacial charger transfer in Pt/g-C3N4. These results show that 2D ultrathin g-C3N4nanosheets can be used as promising photoactived support in the fields of solar and chemical energy conversion and also provide more insights into developing novel visible light photo-responsive electrode in direct methanol fuel cell.