Efficient solar water-splitting using a nanocrystalline CoO photocatalyst
文献类型：期刊论文
| 作者 | Liao, LB ; Zhang, QH ; Su, ZH ; Zhao, ZZ ; Wang, YN ; Li, Y ; Lu, XX ; Wei, DG ; Feng, GY ; Yu, QK ; Cai, XJ ; Zhao, JM ; Ren, ZF ; Fang, H ; Robles-Hernandez, F ; Baldelli, S ; Bao, JM |
| 刊名 | NATURE NANOTECHNOLOGY
 |
| 出版日期 | 2014 |
| 卷号 | 9期号:1页码:69 |
| ISSN号 | 1748-3387 |
| 通讯作者 | Bao, JM (reprint author), Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA. |
| 中文摘要 | The generation of hydrogen from water using sunlight could potentially form the basis of a clean and renewable source of energy. Various water-splitting methods have been investigated previously(1-8), but the use of photocatalysts to split water into stoichiometric amounts of H-2 and O-2 (overall water splitting) without the use of external bias or sacrificial reagents is of particular interest because of its simplicity and potential low cost of operation(1-4). However, despite progress in the past decade, semiconductor water-splitting photocatalysts (such as (Ga1-x Zn-x)(N1-xOx)) do not exhibit good activity beyond 440 nm (refs 1,2,9) and water-splitting devices that can harvest visible light typically have a low solar-to-hydrogen efficiency of around 0.1%(6,7). Here we show that cobalt(II) oxide (CoO) nanoparticles can carry out overall water splitting with a solar-to-hydrogen efficiency of around 5%. The photocatalysts were synthesized from non-active CoO micropowders using two distinct methods (femtosecond laser ablation and mechanical ball milling), and the CoO nanoparticles that result can decompose pure water under visible-light irradiation without any co-catalysts or sacrificial reagents. Using electrochemical impedance spectroscopy, we show that the high photocatalytic activity of the nanoparticles arises from a significant shift in the position of the band edge of the material. |
| 资助信息 | Robert A. Welch Foundation [E-1728]; National Science Foundation [DMR 0907336]; Department of Energy [DE-FG02-13ER46917] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59390]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Liao, LB,Zhang, QH,Su, ZH,et al. Efficient solar water-splitting using a nanocrystalline CoO photocatalyst[J]. NATURE NANOTECHNOLOGY,2014,9(1):69. |
| APA | Liao, LB.,Zhang, QH.,Su, ZH.,Zhao, ZZ.,Wang, YN.,...&Bao, JM.(2014).Efficient solar water-splitting using a nanocrystalline CoO photocatalyst.NATURE NANOTECHNOLOGY,9(1),69. |
| MLA | Liao, LB,et al."Efficient solar water-splitting using a nanocrystalline CoO photocatalyst".NATURE NANOTECHNOLOGY 9.1(2014):69. |
入库方式： OAI收割
来源：物理研究所
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