Electrocatalytic reduction of Cr(VI) over heterophase MoS2 film electrode
文献类型：期刊论文
| 作者 | Li, Xuheng; Wang, Chunli; Liu, Feng ; Zhang, Zhihao; Ali, Jafar; Long, Qingwen; Zhang, Jing
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| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2021-01-15 |
| 卷号 | 404页码:- |
| 关键词 | Electrodeposition Heterophase MoS2 Cr(VI) Electro-reduction Hydrogen peroxide |
| ISSN号 | 1385-8947 |
| 英文摘要 | Electrochemical reduction and treatment of Cr(VI)-contaminated wastewater normally suffer from a high overpotential, due to the extravagant consumption of electrons by the adverse reactions of hydrogen evolution and oxygen reduction. In this work, the MoS2 film electrode prepared by electrochemical deposition-annealing method was applied into the electrochemical reduction of Cr(VI), with the aim to suppress the over-potential of the reduction and improve the utilization of electrons. Results demonstrated that the 2H/1T' heterostructure of MoS2 enhanced the reduction efficiency of Cr(VI) up to 99% at a lower potential of -1.0 V vs. Ag/AgCl. The insitu electrochemically generated hydrogen peroxide was found to play a critical role in accelerating the reduction of Cr(VI). Selective oxygen reduction reaction (ORR) via a two-electron pathway on the MoS2 cathode was responsible for the formation of hydrogen peroxide, where the MoS2 film electrode annealed at 700 degrees C can obtain a high productivity of 360 mu M hydrogen peroxide within 60 min. The plenty of preserved interfaces between 2H and 1 T' in the heterophase MoS2 were crucial to the selective electrocatalytic activity. In addition, this electrode also presented an excellent electrocatalytic activity in hydrogen evolution reaction (HER), which could form atomic hydrogen on the surface of cathode to facilitate the reduction of Cr(VI) under the anoxic condition. This study paves a novel pathway to in-situ deposit the MoS2 film electrode for the sustainable electrochemical reduction and treatment of Cr(VI)-containing wastewater. |
| WOS研究方向 | Engineering, Environmental ; Engineering, Chemical |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45884]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Nanotechnol & Hlth Effect, Beijing 100085, Peoples R China 2.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China 3.Univ Chinese Acad Sci, Natl Engn Lab VOCs Pollut Control Mat & Technol, Beijing 101408, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xuheng,Wang, Chunli,Liu, Feng,et al. Electrocatalytic reduction of Cr(VI) over heterophase MoS2 film electrode[J]. CHEMICAL ENGINEERING JOURNAL,2021,404:-. |
| APA | Li, Xuheng.,Wang, Chunli.,Liu, Feng.,Zhang, Zhihao.,Ali, Jafar.,...&Zhang, Jing.(2021).Electrocatalytic reduction of Cr(VI) over heterophase MoS2 film electrode.CHEMICAL ENGINEERING JOURNAL,404,-. |
| MLA | Li, Xuheng,et al."Electrocatalytic reduction of Cr(VI) over heterophase MoS2 film electrode".CHEMICAL ENGINEERING JOURNAL 404(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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