Visualizing the Nano Cocatalyst Aligned Electric Fields on Single Photocatalyst Particles
文献类型：期刊论文
| 作者 | Zhu, Jian1; Pang, Shan1; Dittrich, Thomas3; Gao, Yuying1,2; Nie, Wei1,2; Cui, Junyan1,2; Chen, Ruotian1,2; An, Hongyu1,2; Fan, Fengtao1; Li, Can1 |
| 刊名 | NANO LETTERS
 |
| 出版日期 | 2017-11-01 |
| 卷号 | 17期号:11页码:6735-6741 |
| 关键词 | Photocatalysis Charge Separation Nano Cocatalyst Size-dependent Effect Surface Imaging Built-in Electric Fields |
| ISSN号 | 1530-6984 |
| DOI | 10.1021/acs.nanolett.7b02799 |
| 文献子类 | Article |
| 英文摘要 | The cocatalysts or dual cocatalysts of photocatalysts are indispensable for high efficiency in artificial photosynthesis for solar fuel production. However, the reaction activity increased by cocatalysts cannot be directly ascribed to the accelerated catalytic kinetics, since photogenerated charges are involved in the elementary steps of photocatalytic reactions. To date, diverging views about cocatalysts show that their exact role for photocatalysis is not well understood yet. Herein, we image directly the local separation of photogenerated charge carriers across single crystals of the BiVO4 photocatalyst which loaded locally with nanoparticles of a MnOx single cocatalyst or with nanoparticles of a spatially separated MnOx and Pt dual cocatalyst. The deposition of the single cocatalyst resulted not only in a strong increase of the interfacial charge transfer but also, surprisingly, in a change of the direction of built-in electric fields beneath the uncovered surface of the photocatalyst. The additive electric fields caused a strong increase of local surface photovoltage signals (up to 80 times) and correlated with the increase of the photocatalytic performance. The local electric fields were further increased (up to 2.5 kV.cm(-1)) by a synergetic effect of the spatially separated dual cocatalysts. The results reveal that cocatalyst has a conclusive effect on charge separation in photocatalyst particle by aligning the vectors of built-in electric fields in the photocatalyst particle. This effect is beyond its catalytic function in thermal catalysis. |
| WOS关键词 | HIGH QUANTUM EFFICIENCY ; WATER OXIDATION ; BIVO4 PHOTOCATALYST ; HYDROGEN-PRODUCTION ; CHARGE SEPARATION ; DIFFERENT FACETS ; PT-PDS/CDS ; EVOLUTION ; PHOTOANODES ; SURFACE |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000415029000035 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/168440]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Fan, Fengtao; Li, Can |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Collaborat Innovat Ctr Chem Energy Mat iChEM, State Key Lab Catalysis,Dalian Natl Lab Clean Ener, Zhongshan Rd 457, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Helmholtz Zentrum Berlin Mat & Energie GmbH, Inst Silizium Photovolta, Kekulestr 5, D-12489 Berlin, Germany |
| 推荐引用方式 GB/T 7714 | Zhu, Jian,Pang, Shan,Dittrich, Thomas,et al. Visualizing the Nano Cocatalyst Aligned Electric Fields on Single Photocatalyst Particles[J]. NANO LETTERS,2017,17(11):6735-6741. |
| APA | Zhu, Jian.,Pang, Shan.,Dittrich, Thomas.,Gao, Yuying.,Nie, Wei.,...&Li, Can.(2017).Visualizing the Nano Cocatalyst Aligned Electric Fields on Single Photocatalyst Particles.NANO LETTERS,17(11),6735-6741. |
| MLA | Zhu, Jian,et al."Visualizing the Nano Cocatalyst Aligned Electric Fields on Single Photocatalyst Particles".NANO LETTERS 17.11(2017):6735-6741. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。