Fabrication and Kinetic Study of a Ferrihydrite-Modified BiVO4 Photoanode
文献类型：期刊论文
| 作者 | Yu, Fengshou1; Li, Fei1; Yao, Tingting2; Du, Jian1; Liang, Yongqi1; Wang, Yong1; Han, Hongxian2; Sun, Licheng1,3 |
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2017-03-01 |
| 卷号 | 7期号:3页码:1868-1874 |
| 关键词 | Bismuth Vanadate Water Splitting Photoanode Passivation Ferrihydrite |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.6b03483 |
| 文献子类 | Article |
| 英文摘要 | In spite of great progress in the surface modification of semiconductor photoelectrodes, the role of the metal oxide cocatalyst on photoelectrochemical (PEC) performance is still not well understood. In this study, ferrihydrite (Fh) as a novel cocatalyst was decorated on a wormlike nanoporous BiVO4 photoanode. A surface kinetics study of Fh/BiVO4 by intensity-modulated photocurrent spectroscopy (IMPS) evidences the primary role of Fh on PEC performance enhancement, varying with the loading of Fh. It was found that dispersed Fh le nanoparticles accelerate hole transfer for water oxidation, but the resulting photoanode suffers from poor stability. The thick layers of Fh address the stability of the electrode by suppressing surface charge recombination but result in reduced hole transfer rates. Modification of a BiVO4 film with optimally thick layers of discrete nanoflakes effectively reduces charge recombination without compromising stability, leading to a high AM 1.5 G photocurrent of 4.78 mA/cm(2) at 1.23 V versus the reversible hydrogen electrode and an applied bias photon to current efficiency of 1.81% at 0.61 V. These values are comparable to the best results reported for undoped BiVO4. |
| WOS关键词 | PHOTOELECTROCHEMICAL WATER OXIDATION ; MODULATED PHOTOCURRENT SPECTROSCOPY ; OXYGEN EVOLUTION ; PHOTOGENERATED HOLES ; CHARGE SEPARATION ; IRON-OXIDE ; SOLAR ; EFFICIENT ; IMPEDANCE ; DYNAMICS |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000395726500045 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/169368]  |
| 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 | Li, Fei |
| 作者单位 | 1.Dalian Univ Technol, State Key Lab Fine Chem, DUT KTH Joint Educ & Res Ctr Mol Devices, Dalian 116024, Peoples R China 2.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 3.KTH Royal Inst Technol, Sch Chem Sci & Engn, Dept Chem, S-10044 Stockholm, Sweden |
| 推荐引用方式 GB/T 7714 | Yu, Fengshou,Li, Fei,Yao, Tingting,et al. Fabrication and Kinetic Study of a Ferrihydrite-Modified BiVO4 Photoanode[J]. ACS CATALYSIS,2017,7(3):1868-1874. |
| APA | Yu, Fengshou.,Li, Fei.,Yao, Tingting.,Du, Jian.,Liang, Yongqi.,...&Sun, Licheng.(2017).Fabrication and Kinetic Study of a Ferrihydrite-Modified BiVO4 Photoanode.ACS CATALYSIS,7(3),1868-1874. |
| MLA | Yu, Fengshou,et al."Fabrication and Kinetic Study of a Ferrihydrite-Modified BiVO4 Photoanode".ACS CATALYSIS 7.3(2017):1868-1874. |
入库方式： OAI收割
来源：大连化学物理研究所
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