QIBEBT-IR研究单元&专题: 环境友好催化过程研究组http://ir.qibebt.ac.cn:80/handle/337004/66212024-03-28T14:42:52Z2024-03-28T14:42:52Z碳基催化剂的制备及电催化还原CO2反应性能的研究陈志鹏http://ir.qibebt.ac.cn:80/handle/337004/136812019-12-31T10:57:18Z2019-12-31T10:57:18Z题名: 碳基催化剂的制备及电催化还原CO2反应性能的研究
作者: 陈志鹏2019-12-31T10:57:18ZRevisit the effect of manganese oxidation state on activity in low-temperature NO-SCRHuang, JunHuang, HeLiu, LichengJiang, Hongtaohttp://ir.qibebt.ac.cn:80/handle/337004/106242019-12-31T08:34:05Z2018-09-06T06:58:32Z题名: Revisit the effect of manganese oxidation state on activity in low-temperature NO-SCR
作者: Huang, Jun; Huang, He; Liu, Licheng; Jiang, Hongtao
摘要: MnOx based catalysts exhibit excellent low-temperature activity in the selective catalytic reduction (SCR) of NOx by NH3. The effect of Mn oxidation state (chemical valence) on the NH3-SCR activity is an interesting topic and important for designing an active catalyst. This study aimed to clarify the intrinsic effect of Mn valence in NO-SCR reaction. For this purpose, the pure MnOx (MnO, Mn3O4, Mn2O3, MnO2) and physical mixed 30% MnOx/TiO2 catalysts, as well as three Mn/TiO2 catalysts prepared by impregnation, were investigated for the low temperature NO-SCR with NH3 in the presence of excess O-2. The catalysts were characterized by N-2 adsorption, X-ray diffraction (XRD), X-ray Absorption Fine Structure (XAFS), and temperature programmed reduction of H-2 (H-2-TPR) to probe the physical and chemical properties of catalysts. The MnO5 with different chemical valence exhibited distinct intrinsic activity. The Mn-3|O-4 and MnO/TiO2 showed the highest intrinsic activity (TOR) for the unsupported and supported catalysts, respectively. The MnOx species with low chemical valence (MnO, Mn3O4) exhibited overall high intrinsic SCR activity (larger than 0.012 NO h(-1) nm(-2)mnox). The MnOx with different valence normally changed to higher oxidation state after physically mixed with TiO2. The content of MnOx species with different valence depended on their loading and Mn precursor, showing a totally different constitution. This work provides new insights into the Mn valence effect on the intrinsic activity for low-temperature SCR. (C) 2017 Elsevier B.V. All rights reserved.2018-09-06T06:58:32ZThe flaky Cd film on Cu plate substrate: An active and efficient electrode for electrochemical reduction of CO2 to formateChen, ZhipengWang, NailiangYao, ShuyuLiu, LichengLicheng Liuhttp://ir.qibebt.ac.cn:80/handle/337004/99912019-12-31T08:34:23Z2018-01-10T14:09:22Z题名: The flaky Cd film on Cu plate substrate: An active and efficient electrode for electrochemical reduction of CO2 to formate
作者: Chen, Zhipeng; Wang, Nailiang; Yao, Shuyu; Liu, Licheng; Licheng Liu
摘要: Efficient electrochemical reduction of CO2 to formate was studied on a Cu/Cd composite electrode in 0.5 M KHCO3 aqueous solution, which was prepared by vacuum evaporation coating Cd film on the Cu plate substrate. The results showed that a novel flaky Cd film was deposited on the Cu plate substrate successfully. The performance of formate production on the Cu/Cd composite electrode was related to the electrolysis potential and the thickness of Cd film. The electrocatalytic activity of Cu/Cd composite electrode toward CO2 reduction was enhanced in comparison with pure Cu plate and Graphite-Paper/Cd (G-P/Cd) electrodes. The maximum Faradaic efficiency of 76.2% for formate production has been obtained with high stability and current densities of 10.6 mA cm(-2) at -1.8 V (vs. Ag/AgCl) on the composite electrode with depositing a similar to 300 nm thick Cd film on the Cu substrate.2018-01-10T14:09:22Z3D hierarchical porous structured carbon nanotube aerogel-supported Sn spheroidal particles: an efficient and selective catalyst for electrochemical reduction of CO2 to formateZhipeng Chen, Shunyu Yao, Licheng LiuLicheng Liuhttp://ir.qibebt.ac.cn:80/handle/337004/99902018-08-27T22:57:04Z2018-01-10T14:09:21Z题名: 3D hierarchical porous structured carbon nanotube aerogel-supported Sn spheroidal particles: an efficient and selective catalyst for electrochemical reduction of CO2 to formate
作者: Zhipeng Chen, Shunyu Yao, Licheng Liu; Licheng Liu2018-01-10T14:09:21Z