汪的华
主要研究领域是电化学清洁生产原理与工艺学、节能减排新技术,目前集中在材料低能耗制备和资源高效(循环)利用的环境友好的电化学新体系、新技术及相关应用基础研究。
个性化签名
- 姓名:汪的华
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
环境工程学
- 研究兴趣:主要研究领域是电化学清洁生产原理与工艺学、节能减排新技术,目前集中在材料低能耗制备和资源高效(循环)利用的环境友好的电化学新体系、新技术及相关应用基础研究。
汪的华,1970年生,理学博士,教授,博士生导师。武汉大学学士(环境化学,1991)、硕士(环境化学,1994)、博士(电化学,1998)。1994年7月留校任教。2004年英国诺丁汉大学化工与环境工程学院visiting scholar;2006-2009年间多次赴美国麻省理工学院 (MIT) 材料科学与工程系访问研修和合作研究(visiting scientist、research affiliate)。
主要研究领域是电化学清洁生产原理与工艺学、节能减排新技术,目前集中在材料低能耗制备和资源高效(循环)利用的环境友好的电化学新体系、新技术及相关应用基础研究。包括:(1)“绿色”电化学冶金新技术(熔盐电解固态氧化物、电解熔融氧化物);(2)新型功能材料的短流程制备及其在环境净化、生物医学和能源技术中的应用;(3)电化学清洁生产;(4)金属腐蚀与防护;(5)太空资源原位利用和制氧。在熔盐电解固态氧化物和电解熔融氧化物新技术方面的研究处于国际最前沿。
主持和参与完成国家自然科学基金(NSFC)面上、重点、杰出青年基金项目以及美国DOE、NASA、AISI等资助项目约20项;现主持项目4项。发表国内外期刊论文近70篇(三大索引收录60多篇次);获授权专利3项;获湖北省自然科学三等奖(2005、2008)、全国“挑战杯”大学生课外科技作品竞赛优秀指导教师、武汉大学优秀学生导师等奖励和荣誉称号,2000年入选武汉市晨光计划,2008年入选教育部新世纪优秀人才支持计划。曾任中国环境科学学会大气环境分会第一届委员会委员,现兼任中国腐蚀与防护学会腐蚀电化学及测试方法专业委员会副主任、<<腐蚀科学与防护技术>>编委、中国金属学会熔盐化学与技术委员会委员。
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196
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成果数
5
【期刊论文】More affordable electrolytic LaNi5-type hydrogen storage powders{
汪的华, Yong Zhu, a Dihua Wang, *a Meng Ma, a Xiaohong Hu, a Xianbo Jina and George Z. Chen*ab
Chem. Commun., 2007, 2515-2517,-0001,():
-1年11月30日
Compounding betweenNiO and La2O3 protects the latter from water and molten salt attack, and ensures successful direct electrolytic conversion of the oxide precursors, in the solid state, to more affordable LaNi5-type hydrogen storage materials.
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【期刊论文】Electrochemistry at Conductor/Insulator/Electrolyte Three-Phase Interlines: A Thin Layer Model
汪的华, Yuan Deng, † Dihua Wang, *, † Wei Xiao, † Xianbo Jin, † Xiaohong Hu, † and George Z. Chen*, †, ‡
J. Phys. Chem. B 2005, 109, 14043-14051,-0001,():
-1年11月30日
A thin layer model is proposed to assist in the understanding of the electrochemical conversion of insulator to conductor at the conductor/insulator/electrolyte three-phase interline (3PI) when the influence of mass diffusion in the electrolyte phase is negligible. The model predicts, under potentiostatic conditions, a linear variation of the current or the length of the 3PI with time. When polarization is sufficiently large, the logarithm of the current/time ratio or the 3PI-length/time ratio, according to the model, increases linearly with the applied potential. These predictions were tested against and agreed very well with two practical systems: the electroreduction of solid AgCl to Ag in aqueous KCl and of solid SiO2 to Si in molten CaCl2. Kinetic parameters were derived from experimental data using the model. Particularly, the electron transfer coefficient, R, was found to be about 0.29 for the reduction of AgCl to Ag in the aqueous KCl solution at room temperature but about 10-2 for the reduction of SiO2 to Si in molten CaCl2 at 850℃.
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【期刊论文】Electrolysis of solid MoS2 in molten CaCl2 for Mo extraction without CO2 emission
汪的华, Guoming Li a, Dihua Wang a, *, Xianbo Jin a, George Z. Chen a, b
Electrochemistry Communications 9(2007)1951-1957,-0001,():
-1年11月30日
Sintered (300℃) porous pellets of MoS2 were electrolysed to elemental S and Mo in molten CaCl2 (800-900℃) under argon at 1.0-3.0V for 1-20h. On a graphite anode, the product was primarily S (but traces of CS2 could not yet be excluded by this work) and evaporated from the molten salt, allowing the electrolysis to continue. It then condensed to solid at the lower temperature regions of the system. The anode remained intact after repeated uses. The MoS2 pellet was highly conducting at high temperatures and could be fast electroreduced to fine Mo powders (0.1-1.0lm) in which the S content could be below 1000ppm. No reduction occurred at voltages below 0.5V. Partial reduction was seen at 0.5-0.7V, and converted MoS2 to a mixture of MoS2 and Mo3S4, orMo3S4 and Mo with the Mo content increasing with the voltage. Cyclic voltammetry of the MoS2 powder in a Mo-cavity electrode, together with the electrolysis results, revealed the reduction mechanism to include two steps: MoS2 to Mo3S4 at 0.28V (potential vs. Ag/AgCl), and then to Mo at -0.43V.
Molybdenum disulfide, Molybdenum powder, Sulfur, Molten calcium chloride, Non-consumable anode, Electro-reduction
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【期刊论文】Electro-reduction of cuprous chloride powder to copper nanoparticles in an ionic liquid
汪的华, Linpo Yu a, Huijiao Sun a, Juan He a, Dihua Wang a, *, Xianbo Jin a, Xiaohong Hu a, George Z. Chen a, b
Electrochemistry Communications 9(2007)1374-1381,-0001,():
-1年11月30日
Cyclic voltammetry of the CuCl powder in a cavity microelectrode revealed direct electro-reduction in solid state in 1-butyl-3-methylimidazolium hexafluorophosphate. Potentiostatic electrolysis of the salt powder (attached to a current collector) in the ionic liquid produced Cu nanoparticles as confirmed by X-ray diffraction, energy dispersive X-ray analysis, scanning and transmission electron microscopy. The particle size decreased down to 10 nm when the electrode potential was shifted from -0.9V to -1.8V (versus Ag/Ag+). The electro-reduction and the nanoparticle formation mechanisms were investigated in the ionic liquid and also in aqueous 0.1mol L 1 KCIO4 in which larger Cu particles were obtained.
Ionic liquid, Electro-reduction, Copper nanoparticles, Cavity microelectrode
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汪的华, Dihua Wang a, c, *, Xiao Tang a, Yinyan Qiu a, Fuxing Gan b, George Zheng Chen a, d
Corrosion Science 47(2005)2157-2172,-0001,():
-1年11月30日
Chromates conversion coatings provide very effective corrosion protection for many metals. However, the high toxicity of chromate leads to an increasing interest in using non-toxic alternatives such as molybdates, silicates, rare earth metal ions and etc. In this work, quartz crystal microbalance (QCM) was applied as an in-situ technique to follow the film formation process on zinc (plated on gold) in acidic solutions containing an inorganic inhibitor, i.e. potassium chromate, sodium silicate, sodium molybdate or cerium nitrate. Using an equation derived in this work, the interfacial mass change during the film formation process under different conditions was calculated, indicating three different film formation mechanisms. In the presence of K2CrO4 or Na2SiO3, the film growth follows a mix-parabolic law, showing a process controlled by both ion diffusion and surface reaction. The apparent kinetic equations are 0.4t=-17.4+20Dmf+(Dmf)2 and 0.1t=19.0+8.4Dmf+10(Dmf)2 respectively (t and Dm arein seconds and lg/cm2). In solutions containing Na2MoO4, a logarithmic law of Dmf=-24.7+6.6 lnt was observed. Changing the inhibitor to Ce(NO3)3, the film growth was found to obey an asymptote law that could be fit into the equation of Dmf=55.1(1-exp(-2.6×10-3t)).
Zinc, Inhibitor, Film formation kinetics, Quartz crystal microbalance
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