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Enhanced photocatalytic N-2 fixation by promoting N-2 adsorption with a co-catalyst
文献类型：期刊论文
| 作者 | X.Gao; L.An; D.Qu; W.S.Jiang; Y.X.Chai; S.R.Sun; X.Y.Liu |
| 刊名 | Science Bulletin
 |
| 出版日期 | 2019 |
| 卷号 | 64期号:13页码:918-925 |
| 关键词 | NiS,driven nitrogen-fixation,ammonia-synthesis,visible-light,oxygen,vacancies,water |
| ISSN号 | 2095-9273 |
| DOI | 10.1016/j.scib.2019.05.009 |
| 英文摘要 | Photocatalytic N-2 fixation involves a nitrogen reduction reaction on the surface of the photocatalyst to convert N-2 into ammonia. Currently, the adsorption of N-2 is the limiting step for the N-2 reduction reaction on the surface of the catalyst. Based on the concept of photocatalytic water splitting, the photocatalytic efficiency can be greatly enhanced by introducing a co-catalyst. In this report, we proposed a new strategy, namely, the loading of a NiS co-catalyst on CdS nanorods for photocatalytic N-2 fixation. Theoretical calculation results indicated that N-2 was effectively adsorbed onto the NiS/CdS surface. Temperature programmed desorption studies confirmed that the N-2 molecules preferred to adsorb onto the NiS/CdS surface. Linear sweep voltammetry results revealed that the overpotential of the N-2 reduction reaction was reduced by loading NiS. Furthermore, transient photocurrent and electrochemical impedance spectroscopy indicated that the charge separation was enhanced by introducing NiS. Photocatalytic N-2 fixation was carried out in the presence of the catalyst dispersed in water without any sacrificial agent. As a result, 1.0 wt% NiS/CdS achieved an ammonia production rate of 2.8 and 1.7 mg L (1) for the first hour under full spectrum and visible light (lambda > 420 nm), respectively. The catalyst demonstrated apparent quantum efficiencies of 0.76%, 0.39% and 0.09% at 420, 475 and 520 nm, respectively. This study provides a new method to promote the photocatalytic efficiency of N(2 )fixation. (C) 2019 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/63373]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | X.Gao,L.An,D.Qu,et al. Enhanced photocatalytic N-2 fixation by promoting N-2 adsorption with a co-catalyst[J]. Science Bulletin,2019,64(13):918-925. |
| APA | X.Gao.,L.An.,D.Qu.,W.S.Jiang.,Y.X.Chai.,...&X.Y.Liu.(2019).Enhanced photocatalytic N-2 fixation by promoting N-2 adsorption with a co-catalyst.Science Bulletin,64(13),918-925. |
| MLA | X.Gao,et al."Enhanced photocatalytic N-2 fixation by promoting N-2 adsorption with a co-catalyst".Science Bulletin 64.13(2019):918-925. |
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