纳米薄层Pt-Ru及Pt-Pd表面合金电极上CO吸附的原位FTIR研究

以玻碳为基底 ,通过电化学共沉积的方法制备纳米级厚度的表面合金电极 ,运用电化学原位红外反射光谱研究CO的吸附 .结果表明 ,所制备的PT ru和PT Pd纳米级厚度的表面合金电极均具有异常红外效应 ,即吸附在不同表面位上的CO给出的红外谱峰强度增强 ,其方向与相应金属电极表面获得的谱峰方向相反 .研究还显示PT ru和PT Pd表面合金在电催化和表面研究中的重要意义国家自然科学基金!(批准号:29833060)资助项

Room-temperature quantum interference in single perovskite quantum dot junctions

钙钛矿材料由于其高量子产率、载流子迁移率和独特的光致发光特性而在光电材料领域存在诸多潜在的重要应用。研究钙钛矿材料在纳米尺度下电荷输运的独特尺寸效应对钙钛矿光电器件的设计和开发具有重要的指导意义。洪文晶教授课题组基于机械可控裂结技术自主研发了具有皮米级位移调控灵敏度和飞安级电学测量精度的精密科学仪器，对南开大学李跃龙副教授团队合成的钙钛矿量子点进行了深入表征，研究工作成功将量子干涉的研究体系拓展至在光电领域具有重要应用的钙钛矿材料领域，为未来制备基于量子干涉效应的新型钙钛矿器件提供了一种全新的思路。 这一跨学科国际合作研究工作是在化学化工学院洪文晶教授、英国Lancaster 大学物理系Colin J. Lambert教授以及南开大学电子信息与光电工程学院李跃龙副教授的共同指导下完成的。化工系硕士研究生郑海宁、Lancaster University大学Songjun Hou博士、南开大学硕士研究生辛晨光为论文第一作者。博士后林禄春，博士研究生谭志冰、郑珏婷，硕士研究生蒋枫、张珑漪，本科生何文翔、李庆民等参与了论文的研究工作。刘俊扬特任副研究员、师佳副教授和萨本栋微纳米研究院杨扬副教授也参与了部分指导工作。The studies of quantum interference effects through bulk perovskite materials at the Ångstrom scale still remain as a major challenge. Herein, we provide the observation of roomtemperature quantum interference effects in metal halide perovskite quantum dots (QDs) using the mechanically controllable break junction technique. Single-QD conductance measurements reveal that there are multiple conductance peaks for the CH3NH3PbBr3 and CH3NH3PbBr2.15Cl0.85 QDs, whose displacement distributions match the lattice constant of QDs, suggesting that the gold electrodes slide through different lattice sites of the QD via Auhalogen coupling. We also observe a distinct conductance ‘jump’ at the end of the sliding process, which is further evidence that quantum interference effects dominate charge transport in these single-QD junctions. This conductance ‘jump’ is also confirmed by our theoretical calculations utilizing density functional theory combined with quantum transport theory. Our measurements and theory create a pathway to exploit quantum interference effects in quantum-controlled perovskite materials.This work was supported by the National Key R&D Program of China (2017YFA0204902, 2014DFE60170, 2018YFB1500105), the National Natural Science Foundation of China (Nos. 21673195, 21503179, 21490573, 61674084, 61874167), the Open Fund of the Key Laboratory of Optical Information Science & Technology (Nankai University) of China, the Fundamental Research Funds for the Central Universities of China (63181321, 63191414, 96173224), and the 111 Project (B16027), the Tianjin Natural Science Foundation (17JCYBJC41400), FET Open project 767187—QuIET, the EU project BAC-TO-FUEL and the UK EPSRC projects EP/N017188/1, EP/M014452/1. 该工作得到国家重点研发计划课题（2017YFA0204902）、国家自然科学基金（21673195、21503179、21490573）、厦门大学“人工智能分析引擎”双一流重大专项等项目的资助，也得到了固体表面物理化学国家重点实验室、能源材料化学协同创新中心的支持

Study on Electrosynthesis of Butyl Butyrate at Conducting Oxide Anode Support on Titanium

本文研究了某些氧化物电极在不同条件下对丁醇电解直接合成丁酸丁酯的影响，并测定了这些氧化物电极上的丁醇氧化极化曲线．结果表明Ｔｉ／ＰｂＯ２电极在加入ＳｎＯ２、Ｓｂ２Ｏ３、ＰｄＯｘ中间层后，不仅电极的ＰｂＯ２层不易脱落，而且使电极的电催化性能有较大的提高．Synthesis of butyl butyrate by direct electroxidation of n butyl alcohol and the electrochemical behaviors of several selected conducting oxide electrodes (Pb/PbO 2、Ti/PbO 2、i/SnO 2 +Sb 2O 3 /PbO 2 and Ti/SnO 2+Sb 2O 3+PdO x/PbO 2) have been investigated. The results demonstrated that the intermediate layers of SnO 2、Sb 2O 3 and PdO x could significantly decrease the interfacial resistance of the electrodes,and that the Ti/SnO 2+Sb 2O 3+PdO x/PbO 2 electrode possessed better electrocatelytic performance than others.作者联系地址：温州师范学院化学系,华东师范大学化学系Author's Address: Dept. of Chem., Wenzhou Normal Co., Wenzhou 325003 Chen Kangning Dept. of Chem., East China Normal Univ., Shanghai 20006

Pd /ZrO_2-Al_2O_3 Catalysts for Total Combustion of Methane

用共沉淀法制备不同摩尔配比的ZrO_2和Al_2O_3混合载体,负载贵金属Pd后,对该催化剂系列进行甲烷燃烧反应的活性表征。利用XRD,BET,BJH孔分布,CO脉冲吸附Pd分散度测定法等技术考察了ZrO_2和Al_2O_3不同配比对混合载体的结构和催化剂性能的影响。结果表明,ZrO_2和Al_2O_3的摩尔比为1:5.8的负载Pd催化剂活性最好,载体中单斜晶相氧化锆和较大孔径分布的催化剂都有助于催化剂活性的改善。A series of mixed oxide supports (ZrO2-Al2O3) were prepared by coprecipitation method, and the supported palladium catalysts were investigated for the low-temperature catalytic combustion of methane. The catalytic activity depends on the composition of the compositive oxide support. XRD analysis indicated that ZrO2 with monoclinic phase enhanced the catalytic activity. And the pore size is also important to the activity of catalyst. Owing to the larger pore diameter, Pd/ZrO2-5. 8Al2O3 showed a higher catalytic activity for methane combustion.科技部973项目(G1999022400);国家自然科学基金(20203014

Effect of the Addition of ZrO_2 on the Structure and Property of Pd/Al_2O_3 Catalyst

采用共沉淀法制得不同摩尔比的ZrO2 和Al2 O3 复合载体 ,考察了负载型Pd/nZrO2 mAl2 O3 催化剂上CH4 的催化燃烧反应 ,当催化剂中n(ZrO2 )∶n(Al2 O3 ) =1∶5 8时催化活性最好。XRD结果显示 ,ZrO2 的引入量影响了催化剂的表面组成和结构 ,当催化剂中存在单斜相ZrO2 及催化剂成大孔径分布时催化剂活性较好。O2 TPD结果表明 ,适量ZrO2 引入 ,促使载体与贵金属的相互作用形成大量活性PdOx,提高了催化剂的CH4氧化能力。Palladium catalysts supported on mixed oxides(Pd/nZrO 2-mAl 2O 3) were prepared by copre cipitation and their activities have been examined in catalytic combustion reaction of methane. It was found that the catalyst with n∶m=1∶5.8 has the highest activity. XRD study revealed that introduction of ZrO 2 affects the surface composition and structure of the catalyst, and the catalyst has good activity when ZrO 2 is in monclinic phase and has gross porosity. O 2-TPD experiments indicated that an appropriate amount of ZrO 2 in the com- posite favors the interaction between carrier and noble metal, leading to the formation of a large amount of PdO x active species and increase of catalystic activity in CH 4 oxidation reaction.科技部“九七三”项目 (G19990 2 2 40 0 );; 国家自然科学基金资助项目 (2 0 2 0 30 14

純鈦活動義齒金屬架

[[abstract]]在齒科發展過程中，純鈦金屬的加入是口腔贋復一個重要的改革，由於純鈦金屬的特性(重量輕，人體生理相容性好) ，使的口腔贋復走向植體的時代，讓原本缺牙的患者有了更多的選擇。 我們這一組做的是純鈦的活動義齒金屬架，有別於一般傳統鈦合金金屬的活動義齒金屬架，純鈦金屬的特性(比重小.強度高)但是金屬本身較為活潑，容易與周遭氣體發生變化故在製作上較為困難。 另外我們也用同一個CASE製作一般傳統鈦合金活動義齒金屬架，以方便比較兩者外形、重量、機械性質有何不同

簡易日照能熱水結構之設計與測試

[[abstract]]本文設計與測試一種簡易日照能熱水結構，其係利用結構之配置，而可將家家戶戶所配置之儲水塔化身為一自動化之水加熱設備，其透過於儲水塔外壁上漆上一漆黑之吸熱層，而後可大幅提升對日照能之吸收能力，而後更以保溫罩套設以阻絕熱能散失，將可達到無能量供應而自生熱水儲存之目的，讓使用者可無需購置太陽能熱水裝置即可應用太陽能做熱水動作，具有高度環保效益