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Deciphering Water Oxidation Catalysts: The Dominant Role of Surface Chemistry over Reconstruction Degree in Activity Promotion

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NANO-MICRO LETTERS 2025年第1期17卷 1-15页

作者： An, Li Li, Jianyi Sun, Yuanmiao Zhu, Jiamin Seow, Justin Zhu Yeow Zhang, Hong Zhang, Nan Xi, Pinxian Xu, Zhichuan J. yan, chun-hua Lanzhou Univ Frontiers Sci Ctr Rare Isotopes Key Lab Nonferrous Met Chem & Resources Utilizat G State Key Lab Appl Organ ChemColl Chem & Chem Eng Lanzhou 730000 Peoples R China Nanyang Technol Univ Sch Mat Sci & Engn Singapore 639798 Singapore Chinese Acad Sci Fac Mat Sci & Energy Engn Shenzhen Inst Adv Technol Inst Technol Carbon Neutral Shenzhen 518055 Peoples R China Yunnan Univ Natl Ctr Int Res Photoelect & Energy Mat Electron Microscopy Ctr Sch Mat & EnergyKey Lab Electromagnet Mat & Devic Kunming 650091 Peoples R China Baotou Res Inst Rare Earths State Key Lab Baiyunobo Rare Earth Resource Res & Baotou 014030 Peoples R China Peking Univ Beijing Natl Lab Mol Sci State Key Lab Rare Earth Mat Chem & Applicat PKU HKU Joint Lab Rare Earth Mat & Bioinorgan Chem Beijing 100871 Peoples R China

Demonstrate that the key factor to determine the activity of reconstructed surfaces is the surface chemistry, instead of reconstruction degree using the popular perovskite LaNi1-xFexO3 oxides as model *** content can influence both the surface reconstruction degree, the activation degree, and the activity of reconstructed *** oxygen evolution reaction activity of reconstructed catalysts is primarily governed by the chemistry of the reconstructed surface species. Water splitting hinges crucially on the availability of electrocatalysts for the oxygen evolution reaction. The surface reconstruction has been widely observed in perovskite catalysts, and the reconstruction degree has been often correlated with the activity enhancement. Here, a systematic study on the roles of Fe substitution in activation of perovskite LaNiO3 is reported. The substituting Fe content influences both current change tendency and surface reconstruction degree. LaNi0.9Fe0.1O3 is found exhibiting a volcano-peak intrinsic activity in both pristine and reconstructed among all substituted perovskites in the LaNi1-xFexO3 (x = 0.00, 0.10, 0.25, 0.50, 0.75, 1.00) series. The reconstructed LaNi0.9Fe0.1O3 shows a higher intrinsic activity than most reported NiFe-based catalysts. Besides, density functional theory calculations reveal that Fe substitution can lower the O 2p level, which thus stabilize lattice oxygen in LaNi0.9Fe0.1O3 and ensure its long-term stability. Furthermore, it is vital interesting that activity of the reconstructed catalysts relied more on the surface chemistry rather than the reconstruction degree. The effect of Fe on the degree of surface reconstruction of the perovskite is decoupled from that on its activity enhancement after surface reconstruction. This finding showcases the importance to customize the surface chemistry of reconstructed catalysts for water oxidation.

关键词： Oxygen evolution reaction Perovskite oxides Doping Activation and reconstruction

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First Binary Mixture Ionic Liquids Containing EMIMBr and IM

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Chinese Chemical Letters 2003年第6期14卷 634-636页

作者： Li Yi DAI chun yan hua Sheng Rong YE Yong Kui SHAN Ming Yuan HE Center for the Chemistry of Ionic Liquid East China Normal UniversityShanghai 200062

A new series of binary mixture ionic liquids comprising 1-ethyl-3-methylimidozalium bromide (EMIMBr) and imidazole (IM) have been synthesized. The melting points of the ionic liquids vary with the different content of IM while they still keep satisfactory conductivity and viscosity. According to the analysis of its phase diagram, the eutectic point is about 16.5C with the mass percentage of IM 29%.

关键词： Ionic liquid binary mixture phase diagram.

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Consensus Hologram QSAR Model Studying on the Aqueous Hydroxyl Radical Oxidation Reaction Rate Constants of Organic Micropollutants

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Chinese Journal of Structural Chemistry 2021年第8期40卷 985-993,967页

作者： JIAO Long LEI Bin QU Le LI Rui yan chun-hua LI Hong College of Chemistry and Chemical Engineering Xi’an Shiyou UniversityXi'an 710065China Shaanxi Cooperative Innovation Center of Unconventional Oil and Gas Exploration and Development Xi’an Shiyou UniversityXi'an 710065China College of Petroleum Engineering Xi’an Shiyou UniversityXi'an 710065China

The combination of hologram quantitative structure-activity relationship(HQSAR)and consensus modeling was employed to study the quantitative structure-property relationship(QSPR)model for calculating the aqueous hydroxyl radical oxidation reaction rate constants(kOH)of organic micropollutants(OMPs).Firstly,individual HQSAR model were established by using standard HQSAR *** optimal individual HQSAR model was obtained while setting the parameter of fragment distinction and fragment size to“B”and“3~6”***,consensus HQSAR model was established by building the regression model between the kOH and the hologram descriptors with consensus partial least-squares(cPLS)*** obtained individual and consensus HQSAR model were validated with a randomly selected external test *** result of external test set validation demonstrates that both individual and consensus HQSAR model are available for predicting the kOH of *** with the optimal individual HQSAR model,the established consensus HQSAR model shows higher prediction accuracy and *** is shown that the combination of HQSAR and consensus modeling is a practicable and promising method for studying and predicting the kOH of OMPs.

关键词： QSPR hologram QSAR consensus modeling organic micropollutants hydroxyl radical rate constant

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Fluorescence-Detected Ultrafast Free-Induction Decay in Powdered Rare Earth Solids

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Chinese Physics Letters 2000年第2期17卷 101-103页

作者： LUO Qi DAI De-Chang YU Xiang-yang QIU Zhi-Ren ZHOU Jian-Ying yan chun-hua CHEN Zhi-Da State Key Laboratory of Ultrafast Laser Spectroscopy Zhongshan UniversityGuangzhou 510275 State Key Laboratory of Rare Earth Materials Chermistry and Applications Peking UniversityBeijing 100871

Fluorescence interferometry is developed and applied to study ultrafast amplitude and phase dynamics for fleeinduction decay in powdered rare earth solids. The time-resolved phase dynamics of free-induction decay throughout the decaying process is accurately determined by using a novel dual-channel correlation technique and subpicosecond dephasing time is measured for Nd3+ solids at room temperature. The phase dynamics is well simulated with linear coherent polarization theory.

关键词： temperature theory Fluorescence

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Automation System in Rare Earths Countercurrent Extraction Processes

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Journal of Rare Earths 2001年第1期19卷 6-10页

作者：贾江涛严纯华廖春生吴声王明文李标国 Peking Univ Beijing Inst Founder Rare Earth Sci & Technol State Key Lab Rare Earth Mat Chem & Applicat Beijing 100871 Peoples R China

Based on the countercurrent extraction theory for optimized designing and simulating, the rare earth separation processes, the selection of the detecting points (stages) and on-line analysis for elements, the simulation of open loop response and its response speed, the diagnosis and the regulative prescription for running the solvent extraction cascades were studied.

关键词： rare earths automation rare earth separation open loop response feedback feedforward

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承继与新变:社会转型中的中唐女子教育

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华南师范大学学报（社会科学版） 2006年第6期 74-79页

作者：严春华华南师范大学文学院广东广州510631

受社会转型的影响,中唐女子教育在承继以往的同时开始了新变;教育面上的相对普及,教育内容上的“德”“才”并行,以及家庭熏陶式的教育方式共同反映出中唐女子教育的整体状况。

关键词：中唐社会转型女子教育

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Inhibitory effect of 2＇-o-methoxyethyl-modified antisense oligonucleotides targeting vascular endothelial growth factor A on SKOV3 human ovarian cancer cells

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Chinese Medical Journal 2011年第10期124卷 1573-1575页

作者： FU Yi-bing WEN Ze-qing ZHAO Xing-bo yan Lei ZHANG chun-hua WANG Fei Department of Obstetrics and Gynaecology Provincial Hospital Affiliated to Shandong University Jinan Shandong 250021 China

Background Ovarian cancers are often at an advanced stage at diagnosis because early detection is difficult. The poor prognosis of ovarian cancers highlights the crucial need to develop better therapeutic agents and strategies. The objective of this study was to investigate the inhibitory effects of a new modified antisense oligonucleotides targeting vascular endothelial growth factor A （VEGF-A） in SKOV3 ovarian cancer *** Antisense oligonucleotides targeting VEGF-A was designed, synthesized and transfected into SKOV3ovarian cancer cells. Western blotting and real-time RT-PCR were used to analyze the inhibitory effects of antisense oligonucleotides on VEGF-A protein and mRNA expression. Transwell matrix assay was used to detect cell migration *** The antisense oligonucleotides targeting VEGF-A significantly decreased VEGF-A protein and mRNA expression and inhibited cell migration in SKOV3 ovarian cancer *** This new modified antisense oligonucleotides targeting VEGF-A can decrease VEGF-A expression and inhibit cell migration in SKOV3 ovarian cancer cells. This new oligonucleotides may be a promising therapeutic agent for ovarian cancers

关键词： vascular endothelial growth factor A ovarian cancer antisense oligonucleotides transfection

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Synthesis and Crystal Structure of a Heteronuclear Erbium and Yttrium Complex with Proline: [ErY(pro)_6(H_2O)_6] (ClO_4)_6

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Chinese Journal of Structural Chemistry 1998年第4期17卷 239-244页

作者： ZHANG hua-Jie WANG Rui-Yao WANG Zhe-Ming JIN Tian-Zhu yan chun-hua(State Key Laboratory of Rare Earth Materials Chemistry and Applications, Research Centerof Rare Earth Chemistry, Peking University, Beijing 100871)yanG Qing-Chuan(Institute of Physical State Key Lab. Rare Earth Mat. C./A. Res. Center of Rare Earth Chemistry Peking University Beijing 100871 China Institute of Physical Chemistry Peking University Beijing 100871 China

The title complex was synthesized in an aqueous solution at pH=3. 5,and its crystal structure was determined by X-ray diffraction methods. The com-plex is triclinic with space group P1, formula C30H66O42N6Cl6ErY, Mr,= 1651. 76, a=9. 860(2), b=13. 020(5), c= 13. 632(5) A ; a= 109. 32(3), β=110. 19(2), γ=100. 96(2)°, V= 1456(1 ) A3, Dc= 1. 884 g/cm3, Z= 1, F(000) =833, P= 2. 812mm-1 ;R=0. 046, wR(F2) =0. 123 for 4897 reflections with I>2(I). The complexis of an infinite chain structure with the neibouring metal ions connected by two bridging carboxyl groups from two different proline molecules. The erbium ion and the yttrium ion statistically lies at the position of the metal ion with M=1/2(Er+Y).

关键词： crystal structure heteronuclear complex of erbium and yttrium proine

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微波场作用下球形亚超细CaS:Mn^(2+),Eu^(2+)的快速合成

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无机材料学报 2000年第5期15卷 791-796页

作者：张迈生臧李纳严纯华中山大学化学与化学工程学院广州510275 北京大学稀土材料化学及应用国家重点实验室北京100083

在微波场作用下，首次快速合成了球形亚超细尺寸的ＣａＳ：Ｍｎ２＋，Ｅｕ２＋深红色荧光体，ＳＥＭ照片显示其粒径为２５０～４００ｎｍ，并可观察到纳米粒子的团聚现象，呈现零维纳米材料的特性．实验结果证实，Ｍｎ２＋与Ｅｕ２... 详细信息

在微波场作用下，首次快速合成了球形亚超细尺寸的ＣａＳ：Ｍｎ２＋，Ｅｕ２＋深红色荧光体，ＳＥＭ照片显示其粒径为２５０～４００ｎｍ，并可观察到纳米粒子的团聚现象，呈现零维纳米材料的特性．实验结果证实，Ｍｎ２＋与Ｅｕ２＋离子间存在着能量传递过程，因而Ｍｎ２＋对Ｅｕ２＋的发光具有明显的敏化和增强作用．

关键词：微波场球形亚超细发光硫化钙掺锰掺铕

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铅卤钙钛矿微纳结构的受激辐射研究

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发光学报 2020年第12期41卷 1479-1489页

作者：黄铃董浩贾凤艳孙聆东严纯华北京大学化学与分子工程学院稀土材料化学及应用国家重点实验室北京大学-香港大学稀土材料与生物无机化学联合实验室北京分子科学中心北京100871 兰州大学化学化工学院甘肃兰州730000

铅卤钙钛矿结构具有吸光系数大、发光量子产率高、带隙可调及发射峰窄的特点,在太阳能电池、发光二极管及受激辐射等领域的研究备受关注。本文介绍了铅卤钙钛矿作为增益介质的受激辐射研究进展,对已报道的纳米晶、微米晶及薄膜的受激辐... 详细信息

铅卤钙钛矿结构具有吸光系数大、发光量子产率高、带隙可调及发射峰窄的特点,在太阳能电池、发光二极管及受激辐射等领域的研究备受关注。本文介绍了铅卤钙钛矿作为增益介质的受激辐射研究进展,对已报道的纳米晶、微米晶及薄膜的受激辐射性能进行了比较,讨论了晶体维度、泵浦条件等对受激辐射的阈值、模式的影响。针对激光器件小型化以及芯片光互联、超灵敏检测等发展趋势和需求,对该领域的机遇与挑战进行了展望。

关键词：铅卤钙钛矿受激辐射微纳结构激光阈值

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