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High-efficiency crystalline carbon nitride photocatalysts:Status and perspectives

Nano Research 2024年第9期17卷 7840-7863页

作者： Wenji Pu Yunqiao Zhou Lingfeng Yang Haifeng Gong Yuhan Li Qingyu Yang Dieqing Zhang Engineering Research center for Waste Oil Recovery Technology and Equipment Ministry of EducationChongqing Key Laboratory of Catalysis and New Environmental MaterialsChongqing Technology and Business UniversityChongqing 400067China The Education Ministry key lab.of Resource chemistry Joint International Research Laboratory of Resource Chemistry of Ministry of EducationShanghai Key Laboratory of Rare Earth Functional Materialsand Shanghai Frontiers Science Center of Biomimetic CatalysisShanghai Normal UniversityShanghai 200234China state key lab.ratory of Tibetan Plateau earth System Resources and EnvironmentInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China

crystallinity and crystal structure greatly influence the photocatalytic behavior of *** g-c3N4 produced by traditional thermal-induced polycondensation reaction bears low crystallinity and thus poor photoactivity,which originates from the incomplete polymerization of the precursor containing amine groups,abundant hydrogen bonds,and unreacted amino,as well as c.a.ide functional groups in the *** photocatalytic process,these residual functional groups often work as electron trap sites,which may hinder the transfer of electrons on the plane,resulting in low ***,crystalline carbon nitride(ccN)was reported as a promising photocatalyst because its increased crystallinity not only reduces the number of carriers recombination centers,but also increases c.a.ge conductivity and improves light utilization due to extendedπ-conjugated systems and delocalizedπ-*** such,we summarize the recent studies on ccN-based photocatalysts for the photoactivity ***,the unique structure and properties of ccN mat.rials are ***,the preparation methods and modification strategies are well *** also sum up the applications of ccN-based mat.rials in the environmental purification and energy ***,this review concerning cNN mat.rials ends with prospects and c.a.lenges in the obtainment of high crystallinity by effective techniques,and the deep understanding of photocatalytic mec.a.ism.

关键词： crystalline carbon nitride preparation method modification strategy photocatalytic.a.plication

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Samarium(Ⅱ) Iodide Promoted Synthesis of 1-ethoxycarbonylmethyl-2-hydrofullerene

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chinese chemical Letters 2000年第4期11卷 289-292页

作者： Sheng ZHANG Liang Bing GAN chun Hui HUANG Xiao Rao HE (Department of chemistry,state key lab.ratory of rare earth mat.rials chemitry and Application,Peking University,Beijing 100871) Department of chemistry State Key Lab. Rare Earth Mat. C. Peking University Beijing 100871 China

the reaction of c_(60) with methyl bromacetate in the presence of Sml_2 gives the title compound 1-methoxycarbonylmethy1-21hydrofullerene in good yield.

关键词： c_(60).samarium iodide.1 2-dihydrofullerene.

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An all-metallic nanovesicle for hydrogen oxidation

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National Science Review 2024年第06期11卷 233-242页

作者： Juntao Zhang Lujie Jin Hao Sun Xiaozhi Liu Yujin Ji Youyong Li Wei Liu Dong Su Xuerui Liu Zhongbin Zhuang Zhiwei Hu Qi Shao Xiaoqing Huang state key lab.ratory of Physical chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Innovation lab.ratory for Sciences and Technologies of Energy mat.rials of Fujian Province(IKKEM) key lab.ratory for Spec.a. Functional mat.rials of Ministry of Education National &Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology School of Materials Science and EngineeringCollaborative Innovation Center of Nano Functional Materials and Applications Henan University Institute of Functional Nano and Soft mat.rials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials& Devices Soochow University state key lab.ratory of rare earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Beijing National lab.ratory for condensed mat.er Physics Institute of Physics Chinese Academy of Sciences state key lab.of Organic-Inorganic composites Beijing University of Chemical Technology Max Planck Institute for chemical Physics of Solids college of chemistry and chemical Engineering and mat.rials Science Soochow University

Vesicle, a microscopic unit that encloses a volume with an ultrathin wall, is ubiquitous in ***, it remains a huge c.a.lenge to create its inorganic metal-based artific.a. counterparts. Here,inspired by the format.on of biological vesicles, we proposed a novel biomimetic strategy of curling the ultrathin nanosheets into nanovesicles, which was driven by the interfac.a. strain. Trapped by the interfac.a. strain between the initially formed substrate Rh layer and subsequently formed RhRu overlayer, the nanosheet begins to deform in order to release a certain amount of strain. Density functional theory（DFT）calculations reveal that the Ru atoms make the curling of nanosheets more favorable in thermodynamics applications. Owing to the unique vesicular structure, the RhRu nanovesicles/c displays excellent hydrogen oxidation reaction（HOR） activity and stability, which has been proven by both experiments and DFT calculations. Specifically, the HOR mass activity of RhRu nanovesicles/c.a.e 7.52 A mg（Rh+Ru）-1at an overpotential of 50 m V at the rotating disk electrode（RDE） level; this is 24.19 times that of commerc.a. Pt/c(0.31 m A mgPt-1). Moreover, the hydroxide exc.a.ge membrane fuel cell（HEMFc） with RhRu nanovesicles/c displays a peak power density of 1.62 W cm-2in the H2-O2condition, much better than that of commerc.a. Pt/c(1.18 W cm-2). This work creates a new biomimetic strategy to synthesize inorganic nanomat.rials, paving a pathway for designing catalytic reactors.

关键词： biomimetic synthesis nanovesicle interfac.a. strain hydrogen oxidation reaction

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X-ray crystal Structure of a Mononuclear copper (Ⅱ) complex with Unusual Monodentate O-coordination of carboxylate Group of Isonicotinate

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chinese chemical Letters 1998年第5期9卷 497-499页

作者： Feng Mei NIE Yan Mei LI Yu Fen ZHAO (Bio-organic Phosphor-us chemistry lab.ratory Department of chemistryTsinghua University, Beijing 100084)Zhe Ming WANG chun Hua YAN (state key lab.ratory of rare earth mat.rials chemistry and Applications,Depart Bio-Organ. Phosphorus chem. lab. Department of Chemistry Tsinghua University Beijing 100084 China state key lab. rare earth mat. c.a. Department of Chemistry Peking University Beijing 100871 China

Reaction of cu(clO4)2'6H2O with tripodal ligand tri s (2-benzi nd dazol yl methyl ) aInine(ntb) and sodium isonicotinate (Iso) yielded a mononuclear complex lcu(ntb)(lso)]clO4.3.5H2O. Thestructure has been established by X-ray crystallography The cu (Ⅱ) atom is in a distorted trigonalbipyranddal environment with three benzimindazole N atoms of ntb defining the equatorial plane, oneandne N atom of ntb, and one O atom of the carboxylate group of isonicotinate occupying the axialpositions.

关键词： copper complex,tripodal ligand benzimidazole isonicotinate crystal structure

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A general and facile calcination method to synthesize single-site catalysts for highly efficient electrochemical cO_(2) reduction

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Nano Research 2024年第5期17卷 3895-3901页

作者： Rui Sui Bingyan Wang Yongsheng Wang Jiajing Pei Wei Zhu Wenxing chen chunhui Li Ailing Sun Zhongbin Zhuang Engineering Research center of Advanced rare earth mat.rials Department of ChemistryTsinghua UniversityBeijing 100084China college of chemistry and Green catalysis center Zhengzhou UniversityZhengzhou 450001China state key lab.of Organic-Inorganic composites and Beijing Advanced Innovation center for Soft mat.er Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Energy&catalysis center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

The electrochemical cO_(2) reduction reaction(cO_(2)RR)has received widespread attention as a promising method for producing sustainable chemicals and mitigating the global ***,we demonstrate a general and facile synthetic route for the metal-nitrogen-carbon(M-N-c)type catalyst by simply calcinating metal acetate and urea with commerc.a. carbon black,which have potential application in cO_(2)*** synthesized Ni-Nc-600 catalyst has the structure of single Ni atom coordinated with one N atom and three c.a.oms(Ni-N_(1)c_(3)),which is suggested by X-ray absorption *** Ni-Nc-600 catalyst exhibits high cO_(2)RR catalytic performance and a high cO Faraday efficiency above 98%in a wide potential range from-0.7 to-1.3 V(*** hydrogen electrode(RHE)),superior to most of the reported Ni-N-c *** work has developed a facile strategy to synthesize high performance cO_(2)RR catalyst.

关键词： nickel single atom catalyst cO_(2)reduction reaction cO production electrocatalyst

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Synthcsis, Structure and Magnetochemistry of a New Hexanuclear Manganese Oxide complex of the Formula [Mn_6O_2 (O_2cPh)_(10)(cH_3cN)_4]

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chinese chemical Letters 1999年第8期10卷 697-700页

作者： Jin AN Zhi Da cHEN Jiang BIAN Shi Xi WANG Guang Xian XU (Department of chemistry, Peking University, Beijing 100871)(state key lab.ratory of rare earth mat.rials chemistry and Applications, rare earth mat.rials and Bio-inorganic chemistry lab.ratory o Department of chemistry Peking University Beijing 100871 China state key lab. rare earth mat. c. Rare Earth Mat. Bio-Inorg. Chem. L. Peking University Beijing 100871 China Department of chemistry Teachers College of Jining Jining 272125 China

The reported X-ray structure and magnetochemical properties of [Mn6O2 (OcPh)10, (cH3cN)4], effectively derived from [NBu4][Mn4O2(O2cPh)9 (H2O)] with equivalent of tren in cH3cN is shown.

关键词： Manganese complex: hexanuclear magnetochemistry. oxide complex crystal structure

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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 lab.ratory of rare earth mat.rials 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 c.a.n 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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A Novel Pentadecanuclear Neodymium cluster: Synthesis and Structure of [Nd_(15)(μ_4-tyr)_(10)(μ_3-OH)_(20)(μ_2-OH)_4(OH)_(10)(μ_2-H_2O)-(H_2O)_(10)][Na(clO_4)_2]·61H_2O

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chinese chemical Letters 1998年第12期9卷 0-0,0-0页

作者： Rui Yao WANG Zhe Ming WANG Song GAO Tian Zhu JIN Zhi Da cHEN chun Hua YAN Guang Xian XU (state key lab.ratory of rare earth mat.rial chemistry and ApplicationsPeking UniverSity, Beijing 100871)cun Heng HE (National Research center for Analysis of Dr state key lab. rare earth mat. c./A. Peking University Beijing 100871 China Natl. Res. ctr. Anal. Drugs/M. Beijing 100050 China

The title complex was synthesized by dissolving tyrosine (tyr) in an aqueous solution ofNd(clO4)3 at NpH5, and its crystal stfucture was determined by X-ray diffraction methods. Thecomplex is a novel pentadecanuclear with the 15 Nd3+ ions connected by μ3-OH- ions. The tyrosineligands are all in their anionic form, and each coordinates to the neodymium ions via the nitrogenatom of the amino group and the two carboxyl oxygen atoms. The molecule a barrel structure.

关键词： Neodymium tyrosine pentadecanuclear cluster

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Application of the Phase Transfer catalysis in rare earth Solvent Extraction

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Journal of rare earths 1996年第2期14卷 88-93页

作者：严纯华张亚文廖春生贾江涛王建方李标国 BEIJING UNIV STATE KEY LAB RARE EARTH MAT CHEM & APPLICATBEIJING 100871PEOPLES R CHINA

In order to overcome the difficulty in stripping and reduce the equilibrium time in heavy rare earth separation with acidic organophosphorous extrac.a.ts, the phase transfer catalysis (PTc) technique was introduced to the solvent extraction process, espec.a.ly applied to the stripping section, which was called phase transfer catalysis stripping (PTcS) process. in the PTcS process, an acidic phosphorous extrac.a.t was mixed with another extrac.a.t which can transfer hydrogen ion from aqueous phase to organic phase and almost does not extract rare earth ions, so that the stripping efficiency can be improved and the stripping extraction equilibrium be accelerated. The reaction mec.a.ism of the PTcS and the requisite properties for a feasible PTcS catalyst in rare earth extraction were studied. We selected D(2)EHPA as the extrac.a.t, Alamine 336 as the PTcS catalyst and mixed rare earth chlorides as the feed to test the PTcS phenomenon. Based on the experimental data, the applicability of PTcS technique in rare earth solvent extraction was discussed.

关键词： rare earths phase transfer catalysis solvent extraction

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Photoelectrochemical　Properties　of　a　Ferrocene　Derivative　and　Its　Langmuir－Blodgett　Film

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Journal of rare earths 1996年第3期14卷 167-172页

作者：夏文胜叶宪曾黄春辉甘良兵王科志骆初平 BEIJING UNIV STATE KEY LAB RARE EARTH MAT CHEM & APPLICATBEIJING 100871PEOPLES R CHINA

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ＰｈｏｔｏｅｌｅｃｔｒｏｃｈｅｍｉｃａｌＰｒｏｐｅｒｔｉｅｓｏｆａＦｅｒｒｏｃｅｎｅＤｅｒｉｖａｔｉｖｅａｎｄＩｔｓＬａｎｇｍｕｉｒ－ＢｌｏｄｇｅｔｔＦｉｌｍＸｉａｗｅｎｓｈｅｎｇ（夏文胜）；ＹｅＸｉａｎｚｅｎｇ（叶宪曾）；ＨｕａｎｇＣｈｕｎｈｕｉ（...

关键词： photoelectrochemical properties ferrocene derivative Langmuir-Blodgett film

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