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Advancements in the development of liquid organic hydrogen carrier systems and their applications in the hydrogen economy

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Progress in Natural Science:Materials International 2024年第5期34卷 825-839页

作者： Alexis Munyentwali Khai Chen Tan teng he Dalian Institute of Chemical Physics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

The transition towards sustainable and clean energy systems has become a significant concern in the modern world. Hydrogen has the potential to meet the growing energy demands while addressing greenhouse gas emissions. However, one major obstacle in utilizing hydrogen as a fuel is the lack of efficient and cost-effective storage methods. In this regard, liquid organic hydrogen carriers(LOHCs) offer several advantages, including high hydrogen storage capacity, improved safety compared to traditional storage methods, and the ability to transport hydrogen using existing liquid fuels' infrastructure. This review summarizes advancements in the development of LOHC systems for hydrogen storage, with a focus on the latest and innovative systems such as those based on dehydrogenative coupling reactions, renewable LOHCs from lignocellulosic biomass, and the development of LOHCs from plastic waste recycling. In addition to the material aspect, this contribution also discusses various applications of LOHCs in the broader context of the hydrogen economy, including a recently proposed concept of mixed gas hydrogenation of LOHCs for realizing hydrogen purification and storage in a single process step. By highlighting the main advantages and challenges of each LOHC system and providing future directions in the development of efficient LOHC systems, this review aims to contribute to an extensive understanding and advancement of LOHCs in the evolving hydrogen-based economy.

关键词： Hydrogen storage Liquid organic hydrogen carriers (LOHCs) Hydrogen economy Hydrogenation Dehydrogenation

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Comparison of Artisan iris-claw intraocular lens implantation and posterior chamber intraocular lens sulcus fixation for aphakic eyes

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International Journal of Ophthalmology(English edition) 2014年第2期7卷 283-287页

作者： he teng Hong Zhang Tianjin Medical University Eye Center

AIM:To compare the efficacy and complications of Artisan iris-claw intraocular lens(IOL)implantation and posterior chamber IOL sulcus fixation for the treatment of aphakic eyes without capsular support after ***:A prospective study of 45 cases was ***-five eyes without sufficient lens capsule support following pars plana vitrectomy(PPV)combined lens extraction were divided into two *** A:25 eyes received Artisan iris-claw IOL *** B:20 eyes received posterior chamber IOL sulcus *** corrected distance visual acuity(CDVA)and intraocular pressure(IOP),corneal endothelial cell loss rate,surgical time and complications were compared between the two *** changes of trabecular meshwork and anterior chamber depths were measured at each time point in Artisan ***:The mean surgical time of Artisan group was significantly shorter(Phelial cell loss rate was noted between two groups at any time point(P>0.05).CDVA of Artian group was better than that of the sulcus fixation group 1d after surgery(Phere was no statistically significant difference 1 and 3mo after surgery(P>0.05).Mean IOP showed no significant differences between groups before and after *** postoperative complications of Artisan group were anterior uveitis,iris depigmentation,pupillary distortion and spontaneous lens *** complications of sulcus fixation group include choroidal detachment,intraocular haemorrhage,tilt of IOL optic part and retinal ***:Secondary Artisan IOL implantation canbe performed less invasively and in a shorter surgical time period with earlier visual recovery after surgery compared to transscleral suturing fixation of an *** technique is an effective and safe *** is a promising option for the treatment of aphakic eyes without capsular support after vitrectomy.

关键词： iris-claw intraocular lens aphakic eye vitrectomy

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Defect-rich potassium amide: A new solid-state potassium ion electrolyte

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Journal of Energy Chemistry 2022年第6期31卷 555-560,I0015页

作者： Jiang Wang Gangtie Lei teng he Hujun Cao Ping Chen Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education School of ChemistryXiangtan UniversityXiangtan 411105HunanChina

One of the major obstacles to the application of potassium-ion batteries in large-scale energy storage is the lack of safe and effective ***_(2),a new potassium-ion solid electrolyte has been developed in this *** ionic conductivity reaches 4.84×10^(-5)S cm^(-1)at 150°C and can reach3.56×10^(-4)S cm^(-1)after mechanochemical *** result from electron paramagnetic resonance(EPR) measurement shows that the increment of ionic conductivity is dependent on the concentration of nitrogen defects in the KNH_(2) *** the best of our knowledge,this is the first report that adopts inorganic amide as an electrolyte for potassium-ion battery and initiates the search for a new amidebased solid electrolyte for an all-solid-state potassium-ion battery.

关键词： Solid-state conductor Potassium ionic conductivity Nitrogen defect Potassium amide

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NaH doped TiO_(2)as a high-performance catalyst for Mg/MgH_(2)cycling stability and room temperature absorption

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Journal of Magnesium and Alloys 2023年第8期11卷 2740-2749页

作者： Joshua Adedeji Bolarin Zhao Zhang Hujun Cao Zhi Li teng he Ping Chen Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianP.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China Shangdong Energy Group Co. LTD.No.10777Jingshi RoadJinan CityShandong Province250014P.R.China School of Material Science and Engineering Xi'an Jiaotong UniversityXi'anShaanxi Province710049P.R.China

This paper presents the catalytic effect of NaH doped nanocrystalline TiO_(2)(designated as NaTiOxH)in the improvement of MgH_(2)hydrogen storage *** catalyst preparation involves ball milling NaH with TiO_(2)for 3 *** addition of 5 wt%NaTiOxH powder into MgH_(2)reduces its operating temperature to∼185℃,which is∼110℃lower than the additive-free as-milled MgH_(2).The composite remarkably desorbs∼7.2 wt%H_(2)within 15 min at∼290℃and reabsorbs∼4.5 wt%H_(2)in 45 min at room temperature under 50 bar H_(2).MgH_(2)dehydrogenation is activated at 57 kJ/mol by the *** importantly,the addition of 2.5 wt%NaTiOxH catalyst aids MgH_(2)to reversibly produce∼6.1 wt%H_(2)upon 100 cycles within 475 hr at 300℃.Microstructural investigation into the catalyzed MgH_(2)composite reveals a firm contact existing between NaTiOxH and MgH_(2)***,the NaTiOxH catalyst consists of catalytically active Ti_(3)O_(5),and“rod-like”Na_(2)Ti_(3)O_(7)species liberated in-situ during preparation;these active species could provide multiple hydrogen diffusion pathways for an improved MgH_(2)sorption ***,the elemental characterization identifies the reduced valence states of titanium(Tihenomenon is believed to enhance the mobility of Mg/MgH_(2)electrons by the creation and elimination of oxygen vacancies in the defective(TiO_(2-x))*** findings have therefore moved MgH_(2)closer to practical applications.

关键词： Magnesium hydride NaH doped nanocrystalline TiO_(2) Kinetics Room temperature absorption Reversibility

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Combination of Toric and multifocal intraocular lens implantation in bilateral cataract patients with unilateral astigmatism

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International Journal of Ophthalmology(English edition) 2016年第12期9卷 1766-1771页

作者： Jing-Li Liang Fang Tian Hong Zhang he teng Tianjin Medical University Eye Hospital Tianjin 300384China

AIM： To assess the binocular visual function in bilateral cataract patients with unilateral astigmatism after combined implantations of Toric with multifocal intraocular lens （IOL）, and to compare with that of Toric and monofocal IOL ***： All the 30 patients with unilateral astigmatism suffered bilateral cataract were randomly divided into two groups： Toric plus multifocal IOL group and Toric plus monofocal IOL group. Uncorrected and corrected visual acuity at distance （5.0 m）, intermediate distance （0.6 m）, and near （0.33 m）, contrast sensitivity, and stereopsis were assessed 6mo after surgery. Patients were also surveyed for visual disturbances and spectacle ***： Binocular uncorrected visual acuity （LogMAR） of Toric/multifocal IOL eyes at distance, intermediate, near were 0.05±0.05, 0.24±0.10, and 0.14±0.06 respectively. The values of Toric plus monofocal IOL eyes were 0.06±0.07, 0.26±0.08, and 0.37±0.10 respectively. These values did not indicate significant differences between two groups with exception of near visual acuity. In the photopic condition （with or without glare）, the contrast sensitivity of multifocal IOL eyes was significant lower than the monofocal IOL eyes in 18 cpd. In the mesopic condition, the contrast sensitivity of multifocal group was significant lower than monofocal group in 12 cpd, and in mesopic glare condition, this significant difference was found both in 6 cpd and 12 cpd. The stereopsis of Toric/multifocal IOL eyes decreased slightly （100±80 seconds of arc, t=2.222, P=0.136）. Mean near vision for patient satisfaction was statistically significantly higher in Toric/multifocal IOL group patients versus than that in Toric/monofocal IOL group （80% vs 25.5%, P=0.000）. Visual disturbance was not noticed in either ***： Although the combination of Toric and multifocal IOL implantation results in compromising stereoacuity, it can still provide patients with high levels of spectacle freedom and good o

关键词： Toric multifocal intraocular lens binocular cataract unilateral astigmatism

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The Roles of Alkali/Alkaline Earth Metals in the Materials Design and Development for Hydrogen Storage

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Accounts of Materials Research 2021年第9期2卷 726-738页

作者： teng he Hujun Cao Ping Chen Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China Dalian Institute of Chemical Physics and State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

CONSPECTUS:Hydrogen storage for onboard applications has been recognized as a grand challenge for the large-scale implementation of hydrogen fuel cell *** research efforts have thus been devoted to the design and development of hydrides of lightweight elements(HLEs).A prominent feature of these materials is the indispensable ingredient of alkali/alkaline earth *** alkaline earth metals(AMs)are highly reactive and have a rich coordination *** a matter of fact,an AM cation can form a complete range of compounds with hydrogenous anions,such as H−,[NH2]−,[BH4]−,[AlH4]−,[NH2BH3]−,[TMHX]−,[R-CH2−NH]−,[R-CH2−O]−,etc.,and,thus,tune the Al−H,N−H,B−H,and C−H bond strengths for hydrogen *** this Account,our research efforts in the development of AM amide-hydride composites,AM amidoboranes,and metalorganic hydrides for hydrogen storage are reviewed.A partial substitution of the H in NH3 by AM gives rise to solid AM amides or *** compounds can react with AM hydride(AMH)to produce *** is driven by the redox reaction between a protic H(N)and hydridic H(AM).A variety of amide-hydride composites holding promise for hydrogen storage were thus developed,including LiNH2-hydride,Mg(NH2)2-hydride,and complex amide-hydride *** amidoboranes,the substitution of H(N)in ammonia borane(AB)by AM transforms the molecular crystal AB into amidoboranes with an ionic crystal structure,leading to significant changes in terms of charge distribution,bond length,intermolecular forces,and so on,which in turn results in enhanced dehydrogenation *** metalorganic hydrides,through reacting AM compounds(usually AM hydride)with aliphatic,carbocyclic,or heterocyclic organic hydrides having“reactive protic H”,corresponding metalorganic hydrides are *** of the electron-donating nature of AM,the strengths of the C−H bond in metal-organic hydrides can be *** each material system,we will introduce the synthesis of mate

关键词： hydride Alkali earth

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Effects of doping FeCl3 on hydrogen storage properties of Li-N-H system

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Progress in Natural Science:Materials International 2017年第1期27卷 139-143页

作者： Weijin Zhang Han Wang Hujun Cao teng he Jianping Guo Guotao Wu Ping Chen Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Institute of Materials Research Materials Technology Helmholtz-Zentrum Geesthacht

The effects of doping FeCl3on the LiNH2-2LiH system were investigated systematically. FeCl3was prior to react with LiH during ball milling their mixtures. The metallic Fe, which is generated from metathesis reaction between FeCl3and LiH, plays an important role on improving the dehydrogenation kinetics of LiNH2-2LiH system. The results indicated that the dehydrogenation peak and ending temperatures of the doped 1 mol%FeCl3sample shifted to low temperatures, and the dehydrogenation active energy changed from 102.45 k J/mol to 87.52 k J/mol. While increasing the amount of FeCl3, an excess of LiCl, the by-product of metathesis reaction between FeCl3and Li H, can stabilize LiNH2and thus hinder hydrogen desorption. The dehydrogenation product is a new solid cubic phase solution of lithium imide-chloride. The high limit of the solid solution of LiCl and Li2NH is near the molar ratio of 1:1.

关键词： Hydrogen storage Iron trichloride Lithium amide Reaction kinetics Solid solution Lithium imide-chloride

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Improved hydrogen desorption properties of Co-doped Li_2 BNH_6

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Chinese Science Bulletin 2011年第23期56卷 2481-2485页

作者： ZheNG XueLi WU GuoTao he teng CHU HaiLiang CheN Hua CheN Ping Key Lab of Green Chemistry and Technology Ministry of Education the Institute of Homogeneous Catalysis College of Chemistry Sichuan University Chengdu 610064 China Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

The hydrogen desorption properties of Li 2 BNH 6 were improved by doping with cobalt. With the addition of CoCl 2 (7 wt%), more than 8 wt% of hydrogen was released from Li 2 BNH 6 at temperatures below 210°C, which is approximately 90°C lower than that of pristine Li 2 BNH 6 . X-ray diffraction, Fourier transform-infrared and Raman characterizations revealed that the dehydrogenation was a stepwise process with the formation of intermediates Li 4 BN 3 H 10 and LiBH 4 and final products of Li 3 BN 2 and LiH. The introduction of Co greatly accelerated the dehydrogenation of Li 4 BN 3 H 10 . X-ray absorption near-edge structure measurements revealed that Co and CoB species formed during ball milling of CoCl 2 with LiBH 4 and LiNH 2 , which may function as catalyst in the subsequent dehydrogenation.

关键词：放氢 X射线吸收近边结构共掺属性脱附傅里叶变换性能改善射线衍射

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Liquid organic hydrogen carriers

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Journal of Energy Chemistry 2015年第5期24卷 587-594页

作者： teng he Qijun Pei Ping Chen Dalian Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

The development of efficient hydrogen storage materials is one of the biggest technical challenges for the coming ＂hydrogen economy＂. The liquid organic hydrogen carriers （LOHCs） with high hydrogen contents, reversibilities and moderate dehydrogenation kinetics have been considered as an alternative option supplementing the extensively investigated inorganic hydride systems. In this review, LOHCs for long distance H2 transport and for onboard application will be discussed with the focuses of the design and development of LOHCs and their hydrogenation ＆ dehydrogenation catalyses.

关键词： Liquid organic hydrogen carrier CycloalkanesheterocycleFormic acid Catalysis

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Tuning the electronic conductance of REH_(x)(RE=Nd,Ce,Pr)by structural deformation

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Journal of Energy Chemistry 2024年第8期95卷 440-445,I0010页

作者： Shangshang Wang Weijin Zhang Jirong Cui Shukun Liu Hong Wen Jianping Guo teng he Hujun Cao Ping Chen Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Catalysis Chinese Academy of SciencesDalian 116023LiaoningChina

Hydride ion(H-)conductors have drawn much attention due to their potential applications in hydrideion-based *** earth metal hydrides(REH_(x))have fast H-conduction which,unfortunately,is accompanied by detrimental electron conduction preventing their application as ion ***,REH_(x)(RE=Nd,Ce,and Pr)with varied grain sizes,rich grain boundaries,and defects have been prepared by ball milling and subsequent *** electronic conductivity of the ball-milled REH_(x)samples can be reduced by 2-4 orders of magnitude compared with the non-ball-milled *** relationship of electron conduction and miscrostructures in REH_(x)is studied and discussed based on experimental data and previously-proposed classical and quantum *** H-conductivity of all REH_(x)is about 10^(-4)to 10^(-3)S cm^(-1)at room temperature,showing promise for the development of H-conductors and their applications in clean energy storage and conversion.

关键词： Hydride ion conduction Electron conduction Nanosized grain Crystal defect Electron scattering

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