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Scalable synthesis of hcp ruthenium-molybdenum nanoalloy as a robust bifunctional electrocatalyst for hydrogen evolution/oxidation

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Journal of Energy Chemistry 2022年第9期31卷 176-185,I0006页

作者： Zhen Zhang Haijun Liu Liwen Ni Zhi-Liang Zhao Hui Li School of Materials science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Department of Materials science and Engineering Shenzhen Key Laboratory of Hydrogen EnergySouthern University of Science and TechnologyShenzhen 518055GuangdongChina Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina

The hydrogen evolution reaction(HER)is the cathodic process of water splitting,and its reverse,the hydrogen oxidation reaction(HOR),is the anodic process of an H-Ofuel cell;both play important roles in the development of hydrogen *** rational design and scalable fabrication of low-cost and efficient bifunctional catalysts for the HER/HOR are highly ***,ultrasmall Mo-Ru nanoalloy(Mo_(0.5)Ru_(3)and Mo_(0.5)Ru_(3))particles uniformly distributed on mesoporous carbon(MPC)were successfully synthesized by a simple method that is easy to scale up for mass *** the incorporation of Mo atoms,the as-prepared Mo_(0.5)Ru_(3)and Mo_(0.5)Ru_(3)nanoalloys maintain a hexagonal-close-packed crystal *** acidic media,Mo_(0.5)Ru_(3)exhibits excellent Pt-like HER and HOR activity,as well as good *** functional theory(DFT)calculations reveal that the H adsorption free energy(ΔG)on the Mo_(0.5)Ru_(3)(001)surface(-0.09 eV)is much closer to zero than that of metallic Ru(-0.22 eV),which contributes to the enhanced catalytic *** alkaline media,Mo_(0.5)Ru_(3)also presents outstanding HER and HOR activity,even significantly outperforming Pt/*** DFT results confirm that optimal binding energies with H*and OH*intermediate species,and low energy barriers in the water dissociation and formation steps,efficiently accelerate the alkaline HER/HOR kinetics of Mo_(0.5)Ru_(3).This study provides a new avenue for the scalable fabrication of high-efficiency bifunctional electrocatalysts for the HER and HOR in both acidic and alkaline media.

关键词： Hydrogen evolution reaction Hydrogen oxidation reaction Ruthenium Water splitting Fuel cell

An in-situ self-etching enabled high-power electrode for aqueous zinc-ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 399-408,I0009页

作者： Shuang Hou Dingtao Ma Yanyi Wang Kefeng Ouyang Sicheng Shen Hongwei Mi Lingzhi Zhao Peixin Zhang College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060GuangdongChina guangdong Provincial Engineering Technology Research Center for Low Carbon and Advanced Energy Materials School of Semiconductor Science and TechnologySouth China Normal UniversityFoshan 528225GuangdongChina SCNU Qingyuan institute of science and Technology Innovation Co. Ltd.Qingyuan 511517GuangdongChina

Sluggish storage kinetics is considered as the main bottleneck of cathode materials for fast-charging aqueous zinc-ion batteries(AZIBs).In this report,we propose a novel in-situ self-etching strategy to unlock the Palm tree-like vanadium oxide/carbon nanofiber membrane(P-VO/C)as a robust freestanding *** investigations including the finite element simulation,in-situ X-ray diffraction,and in-situ electrochemical impedance spectroscopy disclosed it an electrochemically induced phase transformation mechanism from VO to layered Zn_(x)V_(2)O_5·nH_(2)O,as well as superior storage kinetics with ultrahigh pseudocapacitive *** demonstrated,such electrode can remain a specific capacity of 285 mA h g^(-1)after 100 cycles at 1 A g^(-1),144.4 mA h g^(-1)after 1500 cycles at 30 A g^(-1),and even 97 mA h g^(-1)after 3000 cycles at 60 A g^(-1),***,an impressive power density of 78.9 kW kg^(-1)at the super-high current density of 100 A g^(-1)also can be *** design concept of in-situ self-etching free-standing electrode can provide a brand-new insight into extending the pseudocapacitive storage limit,so as to promote the development of high-power energy storage devices including but not limited to AZIBs.

关键词： In-situ self-etching Free-standing electrode Pseudocapacitive storage High-power Zinc-ion batteries

Tetrabenzotriazacorrole and its derivatives as undopea hole transporting materials for perovskite solar cells:Synthesis,device fabrication,and device performance

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Journal of Energy Chemistry 2020年第4期29卷 139-147页

作者： Xian-Fu Zhang Chang Liu Jianchang Wu Baomin Xu Department of Materials science and Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina institute of Applied Photochemistry Hebei Normal University of Science and TechnologyQinhuangdao 066004HebeiChina Shenzhen Engineering Research and Development Center for Flexible Solar Cells Southern University of Science and TechnologyShenzhen 518055GuangdongChina

Phosphorous tetrabenzotriazacorrole(TBC)and its two soluble derivatives(TBC-1 and TBC-2)were synthesized and used for the first time as undoped hole transporting materials(HTMs)in MAPbI3 perovskite solar cells(PSCs).Their performance in PSCs was measured and compared with that of SpiroOMeTAD and phthalocyanine *** fundamental properties related to HTMs are also *** novel HTMs are easily prepared,cost-effective,and solution *** materials exhibited much higher hole transport mobility and broader light absorption than pristine Spiro-OMeTAD and phthalocyanine *** can work efficiently in the absence of any dopant for devices composed of FTO/cp-TiO2/mp-TiO2/MAPbI3/HTM/*** undoped mesoscopic solar cell devices based on TBC exhibited a promising power conversion efficiency(PCE)of up to 16.2%(measured at 100 mWcm2 illumination,AM 1.5 G),together with good long-term stability under ambient *** PCE of 16.2%observed using TBC is remarkably higher than the 11.2%observed using undoped Spiro-OMeTAD and also much better than the 8.70%observed using its phthalocyanine *** to substitution effects,α-substituted TBC-1 was found to be a better HTM thanβ-substituted TBC-2(PCE 11.4%)and unsubstituted TBC-3(PCE 6.81%)under the same *** results provide the basis for further exploiting TBC compounds as a new type of low-cost and effective HTM for PSCs.

关键词： Perovskite solar cell Hole transporting material Tetrabenzotriazacorrole Phthalocyanine

Relative bioavailability of tribasic zinc sulfate for broilers fed a conventional corn-soybean meal diet

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Journal of Integrative Agriculture 2015年第10期14卷 2042-2049页

作者： LI Wen-xiang MA Xin-yan LU Lin ZHANG Li-yang LUO Xu-gang Mineral Nutrition Research Division Institute of Animal Sciences Chinese Academy of Agricultural Sciences institute of Animal science Guangdong Academy of Agricultural Sciences

An experiment was carried out to investigate the relative bioavailability of tribasic zinc（Zn） sulfate relative to Zn sulfate for broilers fed a conventional corn-soybean meal diet. A total of 504 1-d-old Arbor Acres commercial male chicks were randomly assigned by body weight of birds to one of seven treatments involving a 2×3 factorial arrangement with three levels of added Zn（30, 60, or 90 mg of Zn kg–1） and two Zn sources（tribasic Zn sulfate and Zn sulfate） plus a control with no added Zn for an experimental phase of 14 d. Plasma Zn, tibia ash Zn, pancreas Zn, and pancreas metallothionein（MT） messenger RNA（m RNA） were analyzed at 6 or 14 d of age post-hatching. The results showed that plasma Zn, tibia ash Zn, pancreas Zn, and pancreas MT m RNA increased linearly（P〈0.002） as dietary Zn concentration increased at 6 or 14 d of age. The R2 for a linear model was greater on d 6 than on d 14 for the above 4 responsive criteria, and among these indices, the fitting of the tibia ash Zn concentration was the best（R2=0.99）. Therefore, based on slope ratios from the multiple linear regressions of the above 4 indices of the birds at 6 d of age on daily intake of dietary Zn, the bioavailabilities of tribasic Zn sulfate relative to Zn sulfate（100%） were 95.6%（P=0.18）, 83.5%（P=0.01）, 87.9%（P=0.53）, and 75.9%（P=0.38） for the tibia ash Zn, pancreas Zn, plasma Zn, and pancreas MT m RNA, respectively. The results indicated that generally, Zn from tribasic Zn sulfate was as available as Zn from Zn sulfate for broilers.

关键词： tribasic zinc sulfate bioavailability Zn concentration MT gene expression broilers

Spatial Characteristics of Soil Organic Carbon Storage in China's Croplands

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Pedosphere 2005年第4期15卷 417-423页

作者： WANG Shao-Qiang YU Gui-Rui ZHAO Qian-Jun NIU Dong CHEN Qing-Mei WU Zhi-Feng institute of Geographic sciences and Natural Resources Research Beijing 10010 （China）. guangdong institute of Eco-Environment and Soil science Guangzhou 510650 （China）

The soil organic carbon (SOC) pool is the largest component of terrestrial carbon pools. With the construction of a geographically referenced database taken from the second national general soil survey materials and based on 1546 typical cropland soil profiles, the paddy field and dryland SOC storage among six regions of China were systematically quantified to characterize the spatial pattern of cropland SOC storage in China and to examine the relationship between mean annual temperature, precipitation, soil texture features and SOC content. In all regions, paddy soils had higher SOC storage than dryland soils, and cropland SOC content was the highest in Southwest China. Climate controlled the spatial distribution of SOC in both paddy and dryland soils, with SOC storage increasing with increasing precipitation and decreasing with increasing temperature.

关键词： carbon storage cropland soil organic carbon spatial characteristics

Photoelectrocatalytic properties and reactivity of Ti/Au-TiO_2 mesh electrodes

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中国有色金属学会会刊：英文版 2002年第6期12卷 1180-1186页

作者：李芳柏李新军李湘中侯梅芳 Guangzhou institute of Energy Conversion Chinese Academy of Sciences guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control Guangdong Institute of Eco Environment and Soil Science Guangzhou 510650 China Department of Civil and Structural Engineering Hong Kong Polytechnic University guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control Guangdong Institute of Eco Environment and Soil Science

A kind of photoelectrode was innovated by anodising titanium mesh in H 2SO 4 solution and photo reduced in HAuCl 4 solution and named Ti/Au TiO 2 mesh electrode. The structural and surface morphology of the Ti/Au TiO 2 mesh was examined by X ray diffraction, laser Raman spectra, scanning electronic microscopy(SEM) and X ray photoelectron spectroscopy respectively. The results indicate that its crystal structure, morphology and the size of pore are affected greatly by gold deposition. XPS measurement shows that the valence band of Ti/TiO 2 has two peaks: a wide one at 4.97 eV and a narrow one at 6.61 eV, which correspond mainly to π(nonbonding) and σ (bonding) O 2p orbitals. The emission intensity of O 2p orbitals becomes stronger and the width of the valence band increases with the increase of Au content. And the emission of nonbonding shifts toward lower binding energy and that of bonding O 2p orbitals shifts toward higher binding energy. The photoelectrocatalytic(PEC) oxidation of humic acid(HA) was investigated in terms of TOC. The PEC oxidation efficiency of Ti/Au TiO 2 mesh with optimal content of gold is higher than that of Ti/TiO 2 mesh. It is suggested that the recombination of electrons and holes is hindered owing to gold deposition. The investigation shows that PEC oxidation is a convenient way to mineralize organic matter for water treatment.

关键词：光电催化氧化水处理腐殖酸网格电极金钛 Ti/Au-TiO2

Glypican-3 versus alpha-fetoprotein as a biomarker for hepatocellular carcinoma: a diagnostic meta-analysis

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BIOCELL 2015年第2期39卷 25-31页

作者： Weiyu FU Hongyu LU Li LI Kefeng WU Yanping LI Yi LIU Jianli HU institute of Biochemistry and Molecular Biology Guangdong Medical UniversityZhanjiangGuangdongChina College of Food science and Technology Guangdong Ocean UniversityZhanjiangGuangdongChina guangdong Key Laboratory for Research and Development of Natural Drugs Guangdong Medical UniversityZhanjiangGuangdongChina Cancer Center Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubeiChina

Objective:To assess the diagnostic accuracy of serum GPC3 versus alpha-fetoprotein(AFP)for HCC by using the method of system ***:PubMed and EMBASE were searched from its inception to 20,April 2014 for studies that compared diagnostic accuracy of serum GPC3 with AFP for ***,specificity and other measures were pooled using random-effects *** receiver operating characteristic curve analysis was used to summarize the overall test ***:Fourteen studies were included in this *** estimates for serum GPC3 and AFP in diagnosing HCC were as follows:sensitivity,69%(95%confidence interval(CI),56-80%)vs.60%(95%CI,50-69%);specificity,91%(95%CI,76-97%)vs.92%(95%CI,84-98%);diagnostic odds ratio(DOR),22(95%CI,6-83)vs.18(95%CI,8-41);and area under sROC,0.85(95%CI,0.81-0.88)vs.0.80(95%CI,0.76-0.83).The pooled sensitivity and specificity for(GPC3+AFP)and AFP were:sensitivity 80%(95%CI,75-85%)vs.64%(95%CI,53-73%)and specificity 86%(95%CI,74-93%)vs.96%(95%CI,86-99%).A significant heterogeneity was found among the ten studies,and meta-regression and subgroup meta-analysis suggested that race and assay type were probably responsible for the ***:Serum GPC3 may be a promising diagnostic marker of HCC and it was helpful for early detection of primary hepatocellular carcinoma when combined with *** studies for specific race of patients,and using certain methods for detecting GPC3 are required to further confirm the diagnostic value of GPC3 for HCC.

关键词： Glypican-3 AFP Hepatocellular carcinoma diagnostic meta-analysis

PM_(2.5):A barrier to fitness and health promotion in China

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Journal of Sport and Health science 2017年第3期6卷 292-294页

作者： Jincheng Xu Can Gao Jason Kai Wei Lee Jiexiu Zhao Sport Biological Center China Institute of Sport Science sports Hospital National Institute of Sports Medicine Yong Loo Lin School of Medicine National University of Singapore

*** Physical inactivity has been identified as the fourth leading risk factor for global mortality.~1Globally,it accounts for about6%of deaths,21%–25%of breast and colon cancers,27%of diabetes,and 30%of ischemic heart disease.~1In China,the economic costs of health diseases due to physical inactivity had reached 6.7 billion US dollars in 2007,which accounted

关键词： PM A barrier to fitness and health promotion in China SDG

Microstructure and Mechanical Behavior of Mg-Based Bimetal Plates with High Formability Sleeve by Co-extrusion

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Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 499-512页

作者： Yue-Hui Dang Sheng-Lin Liu Xiao-Lei Ai Xiao-Wei Feng Bo Feng Zhuo Tian Ying-Fei Lin Huan-Tao Chen Kai-Hong Zheng School of Materials science and Engineering Chang’an UniversityShaanxi 710064China guangdong Key Laboratory of Metal Toughening Technology and Application Institute of New MaterialsGuangdong Academy of SciencesGuangzhou 510650China

In this study,microstructure and mechanical behavior of two types of Mg-based bimetal plates with a high formability sleeve were systematically studied,with a great emphasis on the effect of the interface characteristic and the sleeve fraction on the plasticity of composite *** rule of mixtures(ROM)for elongation was also *** results show that when there is no or thin diffusion layer with thickness of about 3μm,Mg-based bimetal plates have a good plasticity with elongation of about 19-24%,and the ROM predicted elongations are very close to the experimental *** contrast,with a diffusion layer about 95-155μm thick,Mg-based bimetal plates exhibit a poor plasticity with elongation of about 11-17%,and the experimental elongations largely deviate from the ROM *** plasticity of Mg-based bimetal plates increases with increasing sleeve *** study provides new insights on the plastic deformation of Mg-based bimetal composites with a high formability sleeve.

关键词： Mg-based composites Co-extrusion Microstructure Mechanical behavior Plastic deformation