The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Yexiang Tong - One of the best experts on this subject based on the ideXlab platform.
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facile synthesis of zno sno2 hetero nanotubes with enhanced electrocatalytic property
Catalysis Today, 2015Co-Authors: Jiejing Kong, Zebao Rui, Yexiang TongAbstract:Abstract ZnO/SnO2 hetero nanotubes were fabricated by electrodeposition of ZnO nanorod arrays followed by the hydrothermal growth of SnO2. The morphologies of ZnO/SnO2 hierarchical nanostructures can be well tailored by adjusting the reaction time and pH value in the hydrothermal process. Cyclic voltammetry was used to investigate the electrocatalytic activity of the samples. The results show that ZnO/SnO2 hetero nanotubes with a high electroactive surface area can significantly enhance the Oxygen Evolution Potential and lower the phenol oxidation Potential (∼650 mV) in comparison with the Pt (Ag/AgCl)(∼1000 mV) electrode, SnO2 electrode (∼1400 mV) and ZnO nanorods electrode (∼880 mV). It suggests that such ZnO/SnO2 hetero nanotubes hold great Potential in electrocatalytic oxidation process.
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Facile synthesis of ZnO/SnO2 hetero nanotubes with enhanced electrocatalytic property
Catalysis Today, 2015Co-Authors: Jiejing Kong, Zebao Rui, Yexiang TongAbstract:Abstract ZnO/SnO2 hetero nanotubes were fabricated by electrodeposition of ZnO nanorod arrays followed by the hydrothermal growth of SnO2. The morphologies of ZnO/SnO2 hierarchical nanostructures can be well tailored by adjusting the reaction time and pH value in the hydrothermal process. Cyclic voltammetry was used to investigate the electrocatalytic activity of the samples. The results show that ZnO/SnO2 hetero nanotubes with a high electroactive surface area can significantly enhance the Oxygen Evolution Potential and lower the phenol oxidation Potential (∼650 mV) in comparison with the Pt (Ag/AgCl)(∼1000 mV) electrode, SnO2 electrode (∼1400 mV) and ZnO nanorods electrode (∼880 mV). It suggests that such ZnO/SnO2 hetero nanotubes hold great Potential in electrocatalytic oxidation process.
Aqing Chen - One of the best experts on this subject based on the ideXlab platform.
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A DFT computational study of the mechanism of super-high Oxygen Evolution Potential of W doped SnO2 anodes
Journal of Electroanalytical Chemistry, 2019Co-Authors: Aqing Chen, Selvakumar V. Nair, Bojan Miljkovic, Harry E. RudaAbstract:Abstract W doped SnO2 anodes are shown to exhibit a super-high Oxygen Evolution Potential (OEP) of 2.5 V (vs SHE) based on Density Functional Theory (DFT). Calculation of the free energy of Oxygen Evolution reactions (OER) provided a deep understanding of the mechanism for such high OEP. Typical four-step associative process was used to investigate the OER on (110) surface of W doped SnO2. The analysis of OER indicated that the free energy difference ΔG4 of the third proton-transfer on the (110) W–SnO2 with W on the surface layer contributed to the super-high Oxygen Evolution Potential. Cyclic voltammetric measurements on W doped SnO2 prepared on Ti substrates showed an OEP of 2.6 V (vs SHE) in good agreement with the calculations.
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Insights into the origin of super-high Oxygen Evolution Potential of Cu doped SnO2 anodes: A theoretical study
Applied Surface Science, 2019Co-Authors: Aqing Chen, Shengjian XiaAbstract:Abstract SnO2 based anodes have been recognized as the most promising anodes for wastewater treatment due to the high Oxygen Evolution Potential, high current efficiency and low cost. Herein, using large-scale screening-based density functional theory, we systemically investigate the origin of super-high Oxygen Evolution Potential of Cu doped SnO2 anodes. We find that the low binding energy of OH* on (1 1 0) plane of Cu doped SnO2 anodes leads to the high onset Potential for Oxygen Evolution. Detailed calculations of bond configurations and valence electron numbers reveal that the weak chemical absorption of OH* contribute to the low binding energy. The theoretical onset Potential of Oxygen Evolution of 2.639 V (vs RHE) obtained from Free-energy diagram for OERs agrees well with the experimental value of ∼2.7 V (vs RHE).
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A promising Ti/SnO2 anodes modified by Nb/Sb co-doping
Journal of Electroanalytical Chemistry, 2018Co-Authors: Aqing Chen, Shengjian Xia, Haiyue Pan, Haiying QinAbstract:Abstract Electrochemical properties of Ti/SnO2 anodes, such as Oxygen Evolution Potential, current efficiency and service lifetime, have been enhanced significantly by Nb/Sb co-doping. Characterization of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) indicated that Nb substituted Sn in SnO2 lattice with the chemical state of Nb5+. Electrochemical impedance spectroscopy (EIS) measurement showed that Ti/Nb-Sb-SnO2 anodes, compared to Ti/Sb-SnO2 anodes, have a lower charge transfer resistance, exhibiting more efficient electrocatalytic activity. These results suggest that Ti/Nb-Sb-SnO2 anodes are suitable for use in wastewater treatment.
Jiejing Kong - One of the best experts on this subject based on the ideXlab platform.
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facile synthesis of zno sno2 hetero nanotubes with enhanced electrocatalytic property
Catalysis Today, 2015Co-Authors: Jiejing Kong, Zebao Rui, Yexiang TongAbstract:Abstract ZnO/SnO2 hetero nanotubes were fabricated by electrodeposition of ZnO nanorod arrays followed by the hydrothermal growth of SnO2. The morphologies of ZnO/SnO2 hierarchical nanostructures can be well tailored by adjusting the reaction time and pH value in the hydrothermal process. Cyclic voltammetry was used to investigate the electrocatalytic activity of the samples. The results show that ZnO/SnO2 hetero nanotubes with a high electroactive surface area can significantly enhance the Oxygen Evolution Potential and lower the phenol oxidation Potential (∼650 mV) in comparison with the Pt (Ag/AgCl)(∼1000 mV) electrode, SnO2 electrode (∼1400 mV) and ZnO nanorods electrode (∼880 mV). It suggests that such ZnO/SnO2 hetero nanotubes hold great Potential in electrocatalytic oxidation process.
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Facile synthesis of ZnO/SnO2 hetero nanotubes with enhanced electrocatalytic property
Catalysis Today, 2015Co-Authors: Jiejing Kong, Zebao Rui, Yexiang TongAbstract:Abstract ZnO/SnO2 hetero nanotubes were fabricated by electrodeposition of ZnO nanorod arrays followed by the hydrothermal growth of SnO2. The morphologies of ZnO/SnO2 hierarchical nanostructures can be well tailored by adjusting the reaction time and pH value in the hydrothermal process. Cyclic voltammetry was used to investigate the electrocatalytic activity of the samples. The results show that ZnO/SnO2 hetero nanotubes with a high electroactive surface area can significantly enhance the Oxygen Evolution Potential and lower the phenol oxidation Potential (∼650 mV) in comparison with the Pt (Ag/AgCl)(∼1000 mV) electrode, SnO2 electrode (∼1400 mV) and ZnO nanorods electrode (∼880 mV). It suggests that such ZnO/SnO2 hetero nanotubes hold great Potential in electrocatalytic oxidation process.
Kaigui Zhu - One of the best experts on this subject based on the ideXlab platform.
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Influence of Cr doping on the Oxygen Evolution Potential of SnO2/Ti and Sb-SnO2/Ti electrodes
Journal of Electroanalytical Chemistry, 2019Co-Authors: Cairu Shao, Fan Zhang, Jianhua Zhang, Yusi Jiang, Cheng Huayue, Kaigui ZhuAbstract:Oxygen Evolution Potential is the determining factor affecting the anode efficiency of the wastewater treatment process. In this study, we focus on increasing Oxygen Evolution Potential of Cr-SnO2/ ...
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influence of cr doping on the Oxygen Evolution Potential of sno2 ti and sb sno2 ti electrodes
Journal of Electroanalytical Chemistry, 2019Co-Authors: Cairu Shao, Fan Zhang, Jianhua Zhang, Yusi Jiang, Huayue Cheng, Kaigui ZhuAbstract:Oxygen Evolution Potential is the determining factor affecting the anode efficiency of the wastewater treatment process. In this study, we focus on increasing Oxygen Evolution Potential of Cr-SnO2/ ...
Guohua Zhao - One of the best experts on this subject based on the ideXlab platform.
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distinctive tin dioxide anode fabricated by pulse electrodeposition high Oxygen Evolution Potential and efficient electrochemical degradation of fluorobenzene
Journal of Physical Chemistry C, 2011Co-Authors: Tao Wu, Guohua Zhao, Peiqiang LiAbstract:A distinctive Sb-doped SnO2 anode with a high Oxygen Evolution Potential, 2.4 V vs the saturated calomel electrode, and a strong electrochemical oxidation ability was prepared on TiO2 nanotubes through the pulse electrodeposition method. Compared with the traditional Sb-doped SnO2 electrode prepared by the sol−gel method, the proposed SnO2 electrode has a higher crystallinity, a higher order degree of the atomic lattice, and a lower concentration of Oxygen vacancies. The scanning electron microscopy image confirms that the surface of the electrode presents a three-dimensional structure consisting of Sb-doped SnO2 nanoparticles with a certain microspherical structure, which increases the specific area greatly and provides more active sites. The reaction activation energy also decreases from 11.67 kJ mol−1 for the traditional SnO2 electrode to 5.73 kJ mol−1. This SnO2 electrode is demonstrated to have a superior electrochemical oxidation ability for refractory fluorobenzene, which is extremely stable and ca...
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fabrication and electrochemical treatment application of a novel lead dioxide anode with superhydrophobic surfaces high Oxygen Evolution Potential and oxidation capability
Environmental Science & Technology, 2010Co-Authors: Guohua Zhao, Baoying Lv, Yanan Zhang, Yonggang Zhang, Dongming LiAbstract:A novel PbO2 electrode with a high Oxygen Evolution Potential (OEP) and excellent electrochemical oxidation performance is prepared to improve the traditional PbO2 electrode, which is modified by changing the microstructure and wetting ability. A middle layer of TiO2 nanotubes (NTs) with a large surface area is introduced on Ti substrate, and a small amount of Cu is predeposited at the bottom of TiO2−NTs. The modification will improve the electrochemical performance by enhancing the loading capacity of PbO2 and the combination between PbO2 and Ti substrate. The hydrophilic surface becomes highly hydrophobic by adding fluorine resin. The improved PbO2 electrode exhibits a similar morphology, surface wetting ability, high OEP, and electrochemical performance with boron-doped diamond film (BDD) electrode. However, the physical resistance of the PbO2 electrode is much lower than that of BDD, exhibiting higher conductivity. The hydroxyl radical utilization is significantly enhanced, resulting in a higher oxida...
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Electrochemical degradation of refractory pollutant using a novel microstructured TiO2 nanotubes/ Sb-doped SnO2 electrode.
Environmental science & technology, 2009Co-Authors: Guohua Zhao, Yonggang Zhang, Xiao Cui, Meichuan Liu, Tongcheng Cao, Yanzhu Lei, Lei LiuAbstract:A novel Sb-doped SnO2 electrode featuring high Oxygen Evolution Potential, excellent electrocatalytic performance, and long stability toward electrochemical degradation of refractory organic pollutants was constructed by designing and regenerating the microstructure of the Ti substrate. Highly ordered TiO2 nanotubes (TiO2−NTs) with three-dimensional microstructure, large specific surface area and space utilization rate could be grown in situ on Ti substrate under controlled conditions, followed by being implanted with Sb-doped SnO2 through a surfactant-assisted, sol−gel method under vacuum environment. The amount of Sb-doped SnO2 and service lifetime for the constructed electrode (TiO2−NTs/SnO2) were 2.4 and 12 times as much as those for a traditional Sb-doped SnO2 (SnO2) electrode. Moreover, the constructed electrode performed at higher Oxygen Evolution Potential and exhibited superior electrochemical capability to that on SnO2 electrode. Compared with low TOC removal by the SnO2 electrode, the TiO2−NTs/...
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Novel vertically aligned TiO2 nanotubes embedded with Sb-doped SnO2 electrode with high Oxygen Evolution Potential and long service time
Materials Chemistry and Physics, 2009Co-Authors: Xiao Cui, Guohua Zhao, Yanzhu Lei, Meichuan LiuAbstract:A vertically aligned TiO2 nanotubes growing on Ti substrate embedded with Sb-doped SnO2 (TiO2-NTs/SnO2–Sb2O5) electrode has been successfully fabricated and its electrochemical properties are investigated. By sol–gel and thermal deposition methods, SnO2–Sb2O5 are embedded into TiO2 nanotubes (TiO2-NTs). Through EFSEM and XRD analysis, it is known that SnO2–Sb2O5 and Ti substrate consist of an integrative electrode by the formation of TiO2-NTs. Meanwhile, in contrast with the typical SnO2-based (Ti/SnO2–Sb2O5) electrode, TiO2-NTs/SnO2–Sb2O5 electrode can increase the load capacity of Sb-doped SnO2 and electrode's surface wettability. Compared with the poor service life of Ti/SnO2–Sb2O5 electrode, this novel embedded electrode enhances the service life sharply. Besides, according to the electrochemical experiments, TiO2-NTs/SnO2–Sb2O5 electrode is superior to Ti/SnO2–Sb2O5 electrode for electrochemical performance.
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High quality Sb-doped SnO2 electrodes with high Oxygen Evolution Potential prepared by in situ hydrothermal synthesis method
Chinese Chemical Letters, 2007Co-Authors: Ai Sheng Huang, Guohua ZhaoAbstract:Abstract High quality Sb-doped SnO2 electrode, with high Oxygen Evolution Potential of 3.0 V, was successfully synthesized on the Ti substrates by in situ hydrothermal synthesis method.
