| 1. |
- Wang, Tongzhou, et al.
(författare)
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Atomically Dispersed Semi-Metallic Selenium on Porous Carbon Membrane as an Electrode for Hydrazine Fuel Cells
- 2019
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 58:38, s. 13466-13471
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Tidskriftsartikel (refereegranskat)abstract
- Electrochemically functional porous membranes of low cost are appealing in various electrochemical devices used in modern environmental and energy technologies. Herein we describe a scalable strategy to construct electrochemically active, hierarchically porous carbon membranes containing atomically dispersed semi-metallic Se, denoted SeNCM. The isolated Se atoms were stabilized by carbon atoms in the form of a hexatomic ring structure, in which the Se atoms were located at the edges of graphitic domains in SeNCM. This configuration is different from that of previously reported transition/noble metal single atom catalysts. The positively charged Se, enlarged graphitic layers, robust electrochemical nature of SeNCM endow them with excellent catalytic activity that is superior to state-of-the-art commercial Pt/C catalyst. It also has long-term operational stability for hydrazine oxidation reaction in practical hydrazine fuel cell.
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| 2. |
- Yu, Han, et al.
(författare)
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Energy-saving removal of methyl orange in high salinity wastewater by electrochemical oxidation via a novel Ti/SnO2-Sb anode-Air diffusion cathode system
- 2015
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Ingår i: Catalysis Today. - : Elsevier BV. - 0920-5861. ; 258, s. 156-161
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Tidskriftsartikel (refereegranskat)abstract
- Electrochemical oxidation is an effective method in removal of organic pollutant from high salinity waste-water (NaCl), by producing active chlorine at anode or hydrogen peroxide at cathode. To solve the existing problems including low efficiency, high cost and energy consumption, a Ti/SnO2-Sb anode (TSSA)-air diffusion cathode (TSSA-ADC) system was investigated for methyl orange (MO) removal from NaCl solution, using single TSSA system as control. The phase composition of TSSA was examined by X-ray diffraction. Accumulated concentrations of active chlorine, hydrogen peroxide, MO removal rate, TOC, pH value were recorded at different current densities. The results indicated that Sb-doped rutile SnO2 was formed on the TSSA. The TSSA and the ADC exhibited good catalysis to chlorine evolution and oxygen reduction, respectively. Although MO were almost completely removed in both systems, higher TOC removal, shorter running time and lower energy consumption were attained in the TSSA-ADC system. pH value was more stable (6.0-6.4) in the TSSA-ADC system than that in the TSSA system (6.0-9.4), predicting its stronger capacity in anti-scaling when treating high salinity wastewater with hard ions like Ca2+ and Mg2+. (C) 2015 Elsevier B.V. All rights reserved.
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| 3. |
- Yu, Han, et al.
(författare)
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Study of the kinetics, mechanisms and catalysis activity of photo-electro degradation of organic pollutants via new neural network based methodology
- 2023
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Ingår i: Applied Catalysis B: Environmental. - : Elsevier BV. - 0926-3373. ; 323
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Tidskriftsartikel (refereegranskat)abstract
- A novel calculation methodology containing modeling and statistics was developed to assist the experimental process for the investigation of organics treatment process. A continuous-flow photo-electro treatment of Norfloxacin (NOR) was chosen as a target subject. The methodology is based on a new synergistic work of reaction energy calculation, full-scanned neural network (NN) simulation and new physical kinetics modeling. Degradation kinetics, mechanisms and activity of degradation catalyst, etc., were studied. As a result, the reaction energy calculation figured out eight potential degradation pathways of NOR with the corresponding intermediate. NN process with fully scanned parameters showed dominating advantage compared to non-linear regression and first-order law in simulation work. With the obtained database from NN, the new physical model successfully distributed degradation contribution into direct, indirect and water flow routes. The new methodology helped to gain more valuable information with less experimental work, which guided the efficient and greener investigation process in corresponding studies.
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