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Aggregate 2024年第1期5卷 175-184页

作者： Yi Kong Yu-chen Wang Xunkun huang WanZhen Liang Yi Zhao Department of chemistry State Key Laboratory of Physical Chemistry of Solid SurfacesiChEMFujian Provincial Key Laboratory of Theoretical and Computational Chemistryand College of Chemistry and Chemical EngineeringXiamen UniversityXiamenPeople’s Republic of China

pure organic materials with persistent and efficient room-temperature phosphorescence have recently aroused great research interest due to their vast potential in *** crucial design principle for such materials is to suppress as much as possible the non-radiative decay of the triplet exciton while maintaining a moderate phosphorescent radiative ***,molecular engineering often exhibits similar regulation trends for the two ***,we propose that the quantum interference caused by aggregation can be utilized to control the phosphorescent and non-radiative decay *** systematically analyze various constructive and destructive transition pathways in aggregates with different molecular packing types and establish clear relationships between the luminescence characters and the signs of the singlet and triplet excitonic *** is shown that the decay channels can be flexibly switched on or off by regulating the packing type and excitonic *** importantly,an enhanced phosphorescent decay and a completely suppressed non-radiative decay can be simultaneously realized in the aggregate packed with inversion *** work lays the theoretical foundation for future experimental realization of quantum interference effects in phosphorescence.

关键词： excitonic coupling intersystem crossing organic aggregates organic room temperature phosphorescence quantum interference

In situ time-resolved FtIRs study of adsorption and oxidation of ethylene glycol on pt(100) electrode

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science Bulletin 2005年第18期 29-32页

作者： FAN Youjun, ZHOU Zhiyou, FAN Chunjie, ZHEN Chunhua, chen shengpei & sun shigang state key laboratory of physical chemistry of solid surfaces, Depart-ment of chemistry, Xiamen University, Xiamen 361005, China

Adsorption and oxidation of ethylene glyco(Eg) on pt(100) electrode were studied by in situ timeresolved FtIRs (tRFtIRs). the tRFtIR spectra recordedat 0.10 V illustrate that an IR band appears near 2050 cm?at t > 5 s, corresponding to linearly bonded CO formed indissociative adsorption of Eg. the tRFtIR results haveconfirmed also that CO species are distributed uniformly onpt(100) surface. Another band appears near 2342 cm?1 at > 70 s, associating with IR absorption of CO2 produced inthe direct oxidation of Eg. With the increase of electrodepotential, the direct oxidation of Eg becomes gradually themain reaction. When the potential is above 0.40 V, the oxidation of Eg occurs mainly via the reactive intermediates, *** containing –COOH determined by in situ tRFtIRs.

关键词： ethylene glycol pt(100) electrode dissociative adsorptionand oxidation in situ time-resolved FtIR spectroscopy.

Evolutionary mechanism and frequency response of graphite electrode at extreme temperatures

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Nano Research 2024年第8期17卷 7283-7289页

作者： shanpeng pei Zhiyong Zhang Xiuli Zhang Yan Liu Xiang Han Linshan Luo pengfei su Chaofei Lan Wei huang Ziqi Zhang Ming-sheng Wang songyan chen Department of physics Xiamen UniversityXiamen 361005China shandong Electric power Engineering Consulting Institute Corporation Jinan 250031China state key Lab of physical chemistry of solid surfaces College of MaterialsXiamen UniversityXiamen 361005China school of semiconductor science and technology South China Normal UniversityFoshan 528225China College of Materials science and Engineering Nanjing Forestry UniversityNanjing 210037China National key laboratory of Integrated Circuits and Microsystems Chongqing 400000China

the battery management system is employed to monitor the external temperature of the lithium-ion battery in order to detect any potential ***,this outside–in detection method often suffers from a lag and is therefore unable to accurately predict the battery’s real-time ***,an inside–out frequency response approach is used to accurately monitor the battery’s state at various temperatures in real-time and correlate it with the solid electrolyte interphase(sEI)evolution of the graphite *** sEI evolution at temperatures of−15,25,60,and 90℃exhibits certain regular characteristics with temperature *** a temperature of−15℃,the Li^(+)-solvent interaction of lithium-ion slowed down,resulting in a significant reduction in *** 25℃,a LiF-rich inorganic sEI was identified as forming,which facilitated lithium-ion ***,high temperatures would induce decomposition of lithium hexafluorophosphate(LipF_(6))and lithium-ion *** the extreme temperature of 90℃,the sEI would be organic-rich,and Li_(x)p_(y)F_(z),a decomposition product of lithium salts,was further oxidized to Li_(x)pO_(y)F_(z),which led to a surge in the charge-transfer resistance at sEI(R_(sei))and a reduction in Coulombic efficiency(CE).this changing relationship can be recorded in real time from the inside out by electrochemical impedance spectroscopy(EIs)*** provides a new theoretical basis for the structural evolution of lithium-ion batteries and the regular characterization of EIs.

关键词： graphite electrode solid electrolyte interphase(sEI)film extreme temperatures frequency response evolutionary mechanism

the proximity between hydroxyl and single atom determines the catalytic reactivity of Rh1/CeO_(2) single-atom catalysts

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Nano Research 2024年第1期17卷 397-406页

作者： Danfeng Wu shuyun Zhou Congcong Du Juan Li Jianyu huang Hong-xia shen Abhaya K.Datye shan Jiang Jeffrey t.Miller sen Lin Haifeng Xiong state key laboratory of physical chemistry of solid surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China state key laboratory of photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China College of Biology and Chemical Engineering Jiaxing UniversityJiaxing 314000China Department of Chemical&Biological Engineering University of New MexicoAlbuquerqueNM 8731-0001USA Davidson school of Chemical Engineering Purdue UniversityWest LafayetteIN 47907-2100USA Innovation laboratory for sciences and technologies of Energy Materials of Fujian province(IKKEM) Xiamen 361102China Fujian key laboratory of Rare-earth Functional Materials Fujian Shanhai Collaborative Innovation Center of Rare-earth Functional MaterialsLongyan 366300China

the local structure of the metal single-atom site is closely related to the catalytic activity of metal single-atom catalysts(sACs).However,constructing sACs with homogeneous metal active sites is a challenge due to the surface heterogeneity of the conventional ***,we prepared two Rh1/CeO_(2)sACs(0.5Rh1/r-CeO_(2)and 0.5Rh1/c-CeO_(2),respectively)using two shaped CeO_(2)(rod and cube)exposing different facets,i.e.,CeO_(2)(111)and CeO_(2)(100).In CO oxidation reaction,the t100 of 0.5Rh1/r-CeO_(2)sACs is 120°C,while the t100 of 0.5Rh1/c-CeO_(2)sACs is as high as 200°*** in-situ CO diffuse reflectance infrared Fourier transform spectroscopy(CO-DRIFts),we found that the proximity between OH group and Rh single atom on the plane surface plays an important role in the catalytic activity of Rh1/CeO_(2)sAC system in CO *** Rh single atom trapped at the CeO_(2)(111)crystal surface forms the Rh1(OH)adjacent species,which is not found on the CeO_(2)(100)crystal surface at room ***,during CO oxidation,the OH group far from Rh single atom on the 0.5Rh1/c-CeO_(2)disappears and forms Rh1(OH)adjacent species when the temperature is above 150°*** formation of Rh1(OH)adjacentCO intermediate in the reaction is pivotal for the excellent catalytic activity,which explains the difference in the catalytic activity of Rh single atoms on two different CeO_(2)*** formed Rh1(OH)adjacent-O-Ce structure exhibits good stability in the reducing atmosphere,maintaining the Rh atomic dispersion after CO oxidation even when pre-reduced at high temperature of 500°*** functional theory(DFt)calculations validate the unique activity and reaction path of the intermediate Rh1(OH)adjacentCO species *** work demonstrates that the proximity between metal single atom and hydroxyl can determine the formation of active intermediates to affect the catalytic performances in catalysis.

关键词： crystal plane Rh1/CeO_(2)single-atom catalyst proximity of Rh and hydroxyl coordination structure CO oxidation

Vibronic coupling effect on intersystem crossing rates of tADF emitters

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Chinese Journal of structural chemistry 2024年第6期43卷 22-24页

作者： Xin huang Yi Zhao Wanzhen Liang state key laboratory of physical chemistry of solid surfaces iChEMFujian Provincial Key Lab of Theoretical and Computational ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China

to take advantage of all the singlet and triplet excitons and then achieve 100%internal quantum efficiency in OLED devices,the scientists have proposed the thermally activated delayed fluorescence(tADF)strategy which tries to achieve"delayed"fluorescence by converting triplet excitons to singlet excitons through a reverse intersystem crossing(IsC/RIsC)process with the help of thermal activation[1].In the early days,the efficient RIsC processes were facilitated by a negligible energy gap(△E_(st))and a large spin-orbit coupling(sOC)matrix element(sOCME)between the first singlet(s_(1))and triplet(t_(1))excited states.

关键词： coupling system emitter

Doped Inorganic Nanoparticles as synergistically Enhanced t1-t2 Dual-Modal MRI Contrast Agents

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Doped Inorganic Nanoparticles as Synergistically Enhanced T1...

对苯二甲酸单羟乙酯水解酶结构与功能的研究进展

中国化学会第28届学术年会

作者： Zijian Zhou 1,Dengtong huang 1,Zhenghuan Zhao 1,Jianfeng Bao 2,Zhong chen 2,Jinhao gao 1,* 1state key laboratory of physical chemistry of solid surfaces,the key laboratory for Chemical Biology of Fujian province,and Department of Chemical Biology,College of chemistry and Chemical Engineering,Xiamen University,Xiamen 361005.2 Department of Electronic science and Fujian key laboratory of plasma and Magnetic Resonance,Xiamen University,Xiamen 361005.

＜正＞the combination of multiple imaging modalities can yield complementary diagnostic information and offer synergistic advantages over the single *** t1-t2 dual-modal strategy for magnetic resonance imaging

关键词： Contrast agents inorganic nanoparticles t1-t2 dual-modal synergistic enhancement MRI

来源： cnki会议评论

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生物工程学报 2024年第9期40卷 2812-2830页

作者：杨媚媛樊芳芳何灵娟陈杰王林泉邱帅吕常江黄俊浙江科技大学生物与化学工程学院、浙江省农业生物资源生化制造协同创新中心、浙江省农产品化学与生物加工技术重点实验室浙江杭州310023 厦门大学化学化工学院固体表面物理化学国家重点实验室福建厦门361005

聚对苯二甲酸乙二醇酯(polyethylene terephthalate,pEt)作为目前广泛使用的塑料之一,其废弃物对全球环境造成了严重污染。pEt降解酶(polyethylene terephthalate hydrolase,pEtase)的发现为处理pEt废弃物提供了一种绿色环保的途径。尽... 详细信息

聚对苯二甲酸乙二醇酯(polyethylene terephthalate,pEt)作为目前广泛使用的塑料之一,其废弃物对全球环境造成了严重污染。pEt降解酶(polyethylene terephthalate hydrolase,pEtase)的发现为处理pEt废弃物提供了一种绿色环保的途径。尽管pEtase降解pEt会产生中间产物,抑制水解酶的进一步降解,影响酶的催化效率,但对苯二甲酸单羟乙酯水解酶[mono(2-hydroxyethyl)terephthalate hydrolase,MHEtase]通过与pEtase协同作用,将pEtase水解产生的中间产物MHEt高效降解为乙二醇(ethylene glycol,Eg)和对苯二甲酸(terephthalic acid,tpA)。MHEtase对MHEt表现出极高的特异性,是完全降解pEt的关键酶。本文全面梳理了MHEtase的三维结构、底物结合模式以及催化反应机理等,介绍了该酶降解活性的结构特征和关键残基,以及酶工程改造的研究进展。同时,对基于MHEtase支架结合pEtase开发定制的酶促pEt降解系统进行了展望,为设计和开发更加高效的pEt水解酶体系提供了参考。

关键词：聚对苯二甲酸乙二醇酯(pEt) 对苯二甲酸单羟乙酯水解酶(MHEtase) 双酶系统塑料降解生物降解

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三合一设计策略促进超细ptNiW@WOx核壳纳米线氢氧化电催化剂的CO耐受性

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science China Materials 2024年第6期67卷 1866-1875页

作者：刘巍杨馥榕孙土来黄晨明赖文川杜佳峰叶进裕曾昱嘉高磊黄宏文 College of Materials science and Engineering Hunan UniversityChangsha 410082China Center for Electron Microscopy State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology and College of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China College of chemistry and Materials science Nanjing Normal UniversityNanjing 210023China state key laboratory for physical chemistry of solid surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China key laboratory of Optoelectronic Devices and systems of Ministry of Education and guangdong province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China shenzhen Research Institute of Hunan University Shenzhen 518055China

铂(pt)是质子交换膜燃料电池(pEMFCs)阳极氢氧化反应(HOR)中最先进的电催化剂.然而,pt催化剂对CO(工业低成本氢燃料中的杂质)极度敏感从而中毒,这会引起器件性能的急剧衰退,导致器件运行成本高.因此,提高pt催化剂的CO耐受性对pEMFCs的... 详细信息

铂(pt)是质子交换膜燃料电池(pEMFCs)阳极氢氧化反应(HOR)中最先进的电催化剂.然而,pt催化剂对CO(工业低成本氢燃料中的杂质)极度敏感从而中毒,这会引起器件性能的急剧衰退,导致器件运行成本高.因此,提高pt催化剂的CO耐受性对pEMFCs的商业化推广至关重要.在此,我们设计合成了一种独特的ptNiW@WO_(x)核壳纳米线来提高pt基催化剂对CO的耐受能力.机理研究表明,表面无定形的WO_(x)壳层可以作为分子围栏,在动力学上阻碍CO扩散到达pt位点.在热力学上,Ni和W元素合金化产生的电子效应可以使pt的d带中心降低,减弱CO在pt位点上的化学吸附.此外,亲氧W元素可以加速水的解离,提供更多OH活性物种,促进CO的氧化脱附.因此,在1000ppm CO/H_(2)条件下,所设计的ptNiW@WO_(x)核壳纳米线催化剂表现出优异的HOR抗CO中毒性能,在4000 s后仍能保持超过90%的HOR电流密度,超过了原始的ptNi纳米线和目前报道的绝大多数pt基催化剂.

关键词： hydrogen oxidation reaction pt-based electrocatalyst CO tolerant fuel cell catalyst design

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scalable spray coated high performance sulfurized electron transporter for efficient and stable perovskite solar modules

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Journal of Energy chemistry 2022年第12期75卷 391-398,I0010页

作者： siqing Nie Qifan Feng Ziheng tang Yaolin Hou Xiaofeng huang Ruihao chen Fang Cao Binghui Wu Jun Yin Jing Li Nanfeng Zheng pen-tung sah Institute of Micro-Nano science and technology Jiujiang Research InstituteState Key Laboratory for Physical Chemistry of Solid SurfacesInnovation Laboratory for Sciences and Technologies of Energy Materials of Fujian ProvinceCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina

the stability issue has been acknowledged as the bottleneck in the practical application of perovskite photovoltaics,while the stabilized interface between the perovskites and charge transport layers dominates their stability performance under different ***,we developed a high-performance sulfurized zinc-titanium mixed oxide(ZtO-s)electron transport layer(EtL)to fabricate large-area efficient and long-term 85℃/85%RH stable perovskite solar *** scalably prepared ZtO-s using the facile spray coating method demonstrates excellent electron mobility close to that of Zn O,in addition to promoting the uniform crystallization of perovskite film across the entire module via the interaction between surface s and pb^(2+).Furthermore,this novel coordination stabilized the interface and reduced the interfacial non-radiative recombination defects within the devices,yielding an efficient and stable performance for the *** efficiency of 21.73%and 17.50%was achieved for blade-coated 36 cm^(2)and 100 cm^(2)perovskite solar modules,*** addition,the encapsulated module(36 cm^(2))shows an attractive humidity and heat stability(85℃/85%RH)performance with a maintained 93.5%of the initial pCE over 1000 h.

关键词： spray coating sulfide Electron transport layer perovskite solar module

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