龚学庆
1.催化:密度泛函理论计算在工业催化过程和机理研究,催化剂结构表征,以及催化剂设计方面的应用。2.材料:密度泛函理论计算在固体材料结构,电子构型,光电性质方面的应用研究。3.生物:利用计算机模拟研究生物体系的化学性质,特别是某些功能性蛋白质活性的化学机理。
个性化签名
- 姓名:龚学庆
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
催化化学
- 研究兴趣:1.催化:密度泛函理论计算在工业催化过程和机理研究,催化剂结构表征,以及催化剂设计方面的应用。2.材料:密度泛函理论计算在固体材料结构,电子构型,光电性质方面的应用研究。3.生物:利用计算机模拟研究生物体系的化学性质,特别是某些功能性蛋白质活性的化学机理。
龚学庆,博士,教授,博士生导师
教育及工作背景:
1996.9 – 2000.7 上海交通大学化学化工学院 工学学士
2001.11 – 2004.10 英国贝尔法斯特女王大学化学学院 理学博士
2004.11 – 2007.6 美国普林斯顿大学化学系 博士后
2007.6 – 今 华东理工大学工业催化研究所 教授,博士生导师
主要研究方向:
1. 催化:密度泛函理论计算在工业催化过程和机理研究,催化剂结构表征,以及催化剂设计方面的应用。
2. 材料:密度泛函理论计算在固体材料结构,电子构型,光电性质方面的应用研究。
3. 生物:利用计算机模拟研究生物体系的化学性质,特别是某些功能性蛋白质活性的化学机理。
代表性论文:
迄今为止已在Nature Mat., J. Am. Chem. Soc., Phys. Rev. Lett., J. Phys. Chem. B等国际著名学术期刊上发表论文十数篇,被引用百余次。
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5
【期刊论文】Role of steps in the reactivity of the anatase TiO2(101) surface
龚学庆, Xue-Qing Gong ?, Annabella Selloni
Journal of Catalysis 249(2007)134-139,-0001,():
-1年11月30日
We studied the adsorption of water, methanol, and formic acid at terraces and steps on the stoichiometric anatase TiO2(101) surface by means ofdensity functional theory calculations. Our results show that the reactivity of the step edges is distinct from that of the (101) terraces and is insteadsimilar to the reactivity of the extended (112) and (100) surfaces, which are exposed at their facets. More specifically, on the (101) terraces, allmolecules are adsorbed in molecular (undissociated) form, and the adsorption energy is rather low (<1 eV). At step D-(112), adsorption energiesare significantly larger than on (101) terraces, but molecular adsorption is still favored by water and methanol. At step B-(100), all of the moleculesprefer to dissociate, even though the adsorption energy of water is lower than on the (101) terrace. The connection between reactivity and localstructure is highlighted, and comparison with available experimental data is provided.
Titanium dioxide, Anatase, Density functional theory, Metal oxides, Defect, Surface step, Surface reactivity, Adsorption, Photocatalysis
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【期刊论文】Steps on anatase TiO2(101)
龚学庆, XUE-QING GONG, ANNABELLA SELLONI*, MATTHIAS BATZILL AND ULRIKE DIEBOLD*
,-0001,():
-1年11月30日
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龚学庆, Xue-Qing Gong, ? Zhi-Pan Liu, ? Rasmita Raval, ? and P. Hu*, ?
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-1年11月30日
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龚学庆, Zhi-Pan Liu, Xue-Qing Gong, Jorge Kohanoff, Cristia?n Sanchez, and P. Hu, *
,-0001,():
-1年11月30日
CO oxidation on TiO2 supported Au has been studied using density functional theory calculations.Important catalytic roles of the oxide have been identified: (i) CO oxidation occurs at the interfacebetween Au and the oxide with a very small barrier; and (ii) O2 adsorption at the interface is the keystep in the reaction. The physical origin of the oxide promotion effect has been further investigated: Theoxide enhances electron transfer from the Au to the antibonding states of O2, giving rise to (i) strongionic bonding between the adsorbed O2, Au, and the Ti cation; and (ii) a significant activation of O2towards CO oxidation.
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【期刊论文】The catalytic role of water in CO oxidation
龚学庆, Xue-Qing Gong and P. Hua) R. Raval
,-0001,():
-1年11月30日
Water, one of the most popular species in our planet, can play a catalytic role in many reactions,including reactions in heterogeneous catalysis. In a recent experimental work, Bergeld, Kasemo, andChakarov demonstrated that water is able to promote CO oxidation under low temperatures (200K). In this study, we choose CO oxidation on Pt(111) in the presence of water as a model system toaddress the catalytic role of water for surface reactions in general using density functional theory.Many elementary steps possibly involved in the CO oxidation on Pt(111) at low temperatures havebeen investigated. We find the following. First, in the presence of water, the CO oxidation barrier isreduced to 0.33 eV (without water the barrier is 0.80 eV). This barrier reduction is mainly due to theH-bonding between the H in the H2O and the O at the transition state (TS), which stabilizes the TS.Second, CO can readily react with OH with a barrier of 0.44 eV, while COOH dissociation toproduce CO2 is not easy (the barrier is 1.02 eV). Third, in the H2O1OH mixed phase, CO can beeasily converted into CO2 . It occurs through two steps: CO reacts with OH, forming COOH; andCOOH transfers the H to a nearby H2O and, at the same time, an H in the H2O transfers to a OH,leading to CO2 formation. The reaction barrier of this process is 0.60 eV under CO coverage of 1/6ML and 0.33 eV under CO coverage of 1/3 ML. The mechanism of CO oxidation at lowtemperatures is discussed. On the basis of our calculations, we propose that the water promotioneffect can in general be divided into two classes: (i) By H-bonding between the H of H2O and anelectron negative species such as the O in the reaction of CO1O1H2O!CO21H2O, H2O canstabilize the TS of the reaction and hence reduce the barrier. (ii) H2O first dissociates into H and OHand then OH or H participates directly in the reaction to induce new reaction mechanism with morefavorable routes, in which OH or H can act as an intermediate. ? 2003 American Institute ofPhysics.
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