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Highly mass activity electrocatalysts with ultralow Pt loading on carbon black for hydrogen evolution reaction

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international Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 182-190页

作者： Shaorou Ke Yajing Zhao Xin Min Yanghong Li Ruiyu Mi Yangai Liu Xiaowen Wu Minghao Fang Zhaohui Huang Engineering research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastersNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China

Pt-based nanocatalysts offer excellent prospects for various ***,the low loading of Pt with excellent performance for efficient and stable nanocatalysts still presents a considerable *** this study,nanocatalysts with ultralow Pt content,excellent performance,and carbon black as support were prepared through in-situ ***~2-nm particles uniformly and stably dispersed on carbon black because of the strong s-p-d orbital hybridizations between carbon black and Pt,which suppressed the agglomeration of Pt *** unique structure is beneficial for the hydrogen evolution *** catalysts exhibited remarkable catalytic activity for hydrogen evolution reaction,exhibiting a potential of 100 mV at 100 mA·cm^(-2),which is comparable to those of commercial Pt/C *** activity(1.61 A/mg)was four times that of a commercial Pt/C catalyst(0.37 A/mg).The ultralow Pt loading(6.84wt%)paves the way for the development of next-generation electrocatalysts.

关键词： hydrogen evolution reaction ultralow platinum in-situ synthesis ultrasound

Cementitious property of NaAlO2-activated Ge slag as cement supplement

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international Journal of Minerals,Metallurgy and Materials 2019年第12期26卷 1594-1603页

作者： Hua-zhe Jiao Shu-fei Wang Ai-xiang Wu Hui-ming Shen Jian-dong Wang international joint research laboratory of henan Province for Underground Space Development and Disaster Prevention Henan Polytechnic UniversityJiaozuo 454000China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China

Germanium(Ge),a waste residue leaching from zinc(Zn)smelting process,has potential cementitious properties and could be recycled as a cement supplement activated by chemical *** this work,a test was conducted to determine the hydration properties of Ge slag-cement-based composites with Ge slag(GS)/ordinary Portland cement(PC)contents of 0wt%,5wt%,10wt%,15wt%,20wt%,and 25wt% and water-to-binder ratio(w/b)of *** activators Ca(OH)2,AlCl3,NaAlO2,and Na2CO3 were mixed under 1wt%,2wt%,3wt%,and 4wt% dosages of GS *** composition and microstructure of the hydration products were investigated by the combined approaches of X-ray diffraction(XRD),thermogravimetry-differential scanning calorimetry(TG-DSC),scanning electron microscopy(SEM),and energy-dispersive X-ray spectroscopy(EDS).First,the GS cementitious property is attributed to the high content of CaSO4·***,the activators affected the acceleration performance in the following order:NaAlO2,Na2CO3,AlCl3,and Ca(OH)*** importantly,the 28-day unconfined compressive strength(UCS)is 45.34 MPa at the optimum formula of 0.6wt% NaAlO2,15wt% GS,and 85wt% PC,which is 9.16% higher than the ***,NaAlO2 is beneficial for the ettringite(AFt)generation,resulting in the C-S-H structure ***,the Zn^2+ residue inhibited the AFt formation,representing an important challenge to the strength growth with curing ***,the GS could be recycled as a supplement to the cement under the activator NaAlO2.

关键词： Ge slag from zinc process recycling activator cement supplements strength

Chelation-mediated in-situ formation of ultrathin cobalt(oxy)hydroxides on hematite photoanode towards enhanced photoelectrochemical water oxidation

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Journal of Energy Chemistry 2021年第5期30卷 152-161页

作者： Zhenzhen Wang Jiayue Rong Jiaqi Lv Ruifeng Chong Ling Zhang Li Wang Zhixian Chang Xiang Wang henan joint international research laboratory of Environmental Pollution Control Materials Henan Provincial Engineering Research Center of Green Anticorrosion Technology for Magnesium AlloysCollege of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475004HenanChina Chemical Science Division and Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN 37831United States

In this work,a facile chelation-mediated route was developed to fabricate ultrathin cobalt(oxy)hydroxides(CoOOH)nanosheets on hematite photoanode(Fe_(2)O_(3)).The route contains two steps of the adsorption of[Co-EDTA]^(2-)species on Fe_(2)O_(3) nanorod array followed by the hydrolysis in alkaline *** resulting CoOOH/Fe_(2)O_(3) exhibits a remarkably improved photocurrent density of 2.10 mA cm^(-2) at 1.23 V ***,which is ca.2.8 times that of bare Fe_(2)O_(3).In addition,a negative shift of onset potential ca.200 mV is *** structural characterizations reveal the chelate EDTA plays important roles that enhance the adsorption of Co species and the formation of contact between CoOOH and Fe_(2)O_(3).(Photo)electrochemical analysis suggests,besides providing active sites for water oxidation,CoOOH at large extent promotes the charge separation and the charge transfer via passivating surface states and suppressing charge *** also found CoOOH possesses some oxygen vacancies,which could act as trapping centers for photogenerated holes and facilitate the charge *** modulated photocurrent spectroscopy(IMPS)shows that,under low applied potential the water oxidation mainly occurs on CoOOH,while under high applied potential the water oxidation could occur on both CoOOH and Fe_(2)O_(3).The findings not only provide an efficient strategy for designing ultrathin(oxy)hydroxides on semiconductors for PEC applications but also put forward a new insight on the role of CoOOH during water oxidation.

关键词： Hematite Cobalt(oxy)hydroxides Photoelectrochemical water oxidation Charge separation

An allelic variation in the promoter of the LRR-RLK gene,qSS6.1,is associated with melon seed size

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Journal of Integrative Agriculture 2024年第10期23卷 3522-3536页

作者： Xiaoxue Liang Jiyu Wang Lei Cao Xuanyu Du Junhao Qiang Wenlong Li Panqiao Wang Juan Hou Xiang Li Wenwen Mao Huayu Zhu Luming Yang Qiong Li Jianbin Hu College of Horticulture Henan Agricultural UniversityZhengzhou 450002China henan Engineering research Center for Cucurbit Germplasm Enhancement and Utilization Zhengzhou 450002China international joint laboratory of henan Horticultural Crop Biology Zhengzhou 450002China

Seed size is an important agronomic trait in melons that directly affects seed germination and subsequent seedling ***,the genetic mechanism underlying seed size in melon remains *** the present study,we employed Bulked-Segregant Analysis sequencing(BSA-seq)to identify a candidate region(~1.35 Mb)on chromosome 6 that corresponds to seed *** interval was confirmed by QTL mapping of three seed size-related traits from an F2 population across three *** mapping region represented nine QTLs that shared an overlapping region on chromosome 6,collectively referred to as *** InDel markers were developed in the qSS6.1 region,narrowing it down to a 68.35 kb interval that contains eight annotated *** variation analysis of the eight genes identified a SNP with a C to T transition mutation in the promoter region of MELO3C014002,a leucine-rich repeat receptor-like kinase(LRR-RLK)*** mutation affected the promoter activity of the MELO3C014002 gene and was successfully used to differentiate the large-seeded accessions(C-allele)from the small-seeded accessions(T-allele).qRT-PCR revealed differential expression of MELO3C014002 between the two parental *** predicted protein has typical LRR-RLK family domains,and phylogenetic analyses reveled its similarity with the homologs in several plant ***,these findings suggest MELO3C014002 as the most likely candidate gene involved in melon seed size *** results will be helpful for better understanding the genetic mechanism regulating seed size in melons and for genetically improving this important trait through molecular breeding pathways.

关键词： melon QTL mapping seed size candidate gene allelic variation

Effects of in-plane stiffness and charge transfer on thermal expansion of monolayer transition metal dichalcogenide

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Chinese Physics B 2015年第2期24卷 343-349页

作者：王占雨周艳丽王雪青王飞孙强郭正晓贾瑜 international joint research laboratory for Quantum Functional Materials of henan Zhengzhou University School of Physics and Engineering Zhengzhou University Department of Mechanical and Electrical Engineering Henan Industry and Trade Vocational College Department of Chemistry University College London

The temperature dependence of lattice constants is studied by using first-principles calculations to determine the effects of in-plane stiffness and charge transfer on the thermal expansions of monolayer semiconducting transition metal *** the corresponding bulk material,our simulations show that monolayer MX2（M = Mo and W;X = S,Se,and Te） exhibits a negative thermal expansion at low temperatures,induced by the bending *** transition from contraction to expansion at higher temperatures is ***,the thermal expansion can be tailored regularly by alteration of the M or X *** analysis shows that the positive thermal expansion coefficient is determined mainly by the in-plane stiffness,which can be expressed by a simple *** the regularity of this change can be attributed to the difference in charge transfer between the different *** findings should be applicable to other two-dimensional systems.

关键词： transition metal dichalcogenide thermal expansion phonon

Effects of carbon content on the microstructure and tensile properties of a low-density steel

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international Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 391-401页

作者： Yongxuan Shang Mingyu Fan Shuyong Jiang Zhongwu Zhang Key laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China State Key laboratory of Metal Material for Marine Equipment and Application Iron&Steel Research Institute of Ansteel Group CorporationAnshan 114009China

Carbon can change the phase components of low-density steels and influence the mechanical *** this study,a new method to control the carbon content and avoid the formation ofδ-ferrite by decarburization treatment was *** microstructural changes and mechanical characteristics with carbon content induced by decarburization were systematically ***-Jaoul(C-J)analysis was employed to examine the work hardening characteristics during the tensile *** decarburization by heat treatments,the carbon content within the austenite phase decreased,while Mn and Al were almost unchanged;this made the steel with full austenite transform into the austenite and ferrite dual ***,(Ti,V)C carbides existed in both matrix phase and the mole fraction almost the *** addition,the formation of other carbides *** loss induced a decrease in strength due to the weakening of the carbon solid *** the steel with the single austinite,the deformation mode of austenite was the dislocation planar glide,resulting in the formation of *** the dual-phase steel,the deformation occurred by the dislocation planar glide of austenite first,with the increase in strain,the cross slip of ferrite took place,forming dislocation cells in *** the late stage of deformation,the work hardening of austinite increased rapidly,while that of ferrite increased slightly.

关键词： low-density steels carbon content decarburization strengthening mechanisms work hardening behavior

Transcriptome-based analysis of key signaling pathways affecting the formation of primordial germ cell in chickens

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Journal of Integrative Agriculture 2024年第5期23卷 1644-1657页

作者： Ying Ding Qiong Zhi Qisheng Zuo Kai Jin Wei Han Bichun Li Key laboratory of Animal Genetics Breeding and Molecular Design of Jiangsu ProvinceCollege of Animal Science and TechnologyYangzhou UniversityYangzhou 225009China joint international research laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China Yangzhou UniversityYangzhou225009China poultry research Institute Chinese Academy of Agricultural Sciences/Jiangsu Institute of Poultry ScienceYangzhou 225009China

Bone morphogenetic protein 4(BMP4)can induce the formation of chicken primordial germ cells(PGCs)in vitro;however,its regulatory mechanism in poultry remains *** study aimed to use RNA-seq to analyze PGCs in chicken embryos and iPGCs induced by BMP4 in vitro,clarify the internal regulatory factors of PGCs,analyze the mechanism of the formation of PGCs,and lay a theoretical foundation for the further optimization of PGCs induction *** stem cells(ESCs),PGCs and iPGCs induced by BMP4 in vitro were *** transcriptional maps of the three cell types were studied using *** results showed 6,142 genes differentially expressed between PGCs and iPGCs,of which 2,728 were upregulated in iPGCs and 3,414 were downregulated in *** to that in ESCs,BMP4 was significantly upregulated in PGCs and *** results showed that both the TGF-βand Wnt signaling pathways were activated during the formation of PGCs in vitro and in vivo,and the activation was more significant during iPGCs induced by *** expression of Nodal,an inhibitory factor of TGF-βsignaling,was significantly decreased in PGCs and iPGCs,but was not expressed in iPGCs,which further supports our ***,the Lysosome and PI3K-AKT signaling pathways were significantly enriched in PGCs and iPGCs,***,transmission electron microscopy(TEM)results showed that the number of autolysosomes was significantly higher after the addition of BMP4,which is consistent with the KEGG ***,the number of PGCs was significantly reduced after ATG14 was interfered in vivo and in *** conclusion,this study screened out the key signaling pathways during the formation of PGCs,aiming to provide help for enriching the mechanism network regulating PGCs formation in chicken and laying a theoretical foundation for further improving the efficiency of inducing PGCs in vitro.

关键词： RNA-seq BMP4 PGCs ATG14 chicken

Microstructures and tensile properties of as-cast Mg-5Sn-1Si magnesium alloy modified with trace elements of Y,Bi,Sb and Sr

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China Foundry 2021年第1期18卷 9-17页

作者： He-shuai Yu Xue-feng Guo Hong-bao Cui School of Materials Science and Engineering Henan Polytechnic UniversityJiaozuoHenan454000China henan international joint research laboratory for High-Performance Light Metallic Materials and Numerical Simulations Henan Polytechnic UniversityJiaozuoHenan454000China

The microstructures and mechanical properties of as-cast Mg-5 Sn-1 Si magnesium alloy modified with trace elements Y,Bi,Sb and Sr were investigated and *** show that the microstructure of the as-cast Mg-5 Sn-1 Si alloy consists ofα-Mg,Mg_(2) Si,Mg_(2) Sn and Mg_(2)(Si_xSn_(1-x))*** adding 0.8 wt.%Y,0.3 wt.%Bi,0.9 wt.%Sb and 0.9 wt.%Sr,respectively into the Mg-5 Sn-1 Si magnesium alloy,Mg_(24)Y_(5),Mg_(3) Bi_(2),Mg_(3) Sb_(2) and Mg_(2) Sr phases are precipitated *** elements can refineα-Mg grain and Chinese scriptshaped Mg_(2) Si *** efficiency of different trace elements onα-Mg grain and Mg_(2) Si phase is *** element has the best refinement effect,followed by Sb and Bi,while Y has the least refinement ***-5 Sn-1 Si-0.9 Sr alloy has higher tensile properties than the other three modified *** refinement mechanism of Y,Bi and Sr elements on Mg-5 Sn-1 Si magnesium alloy can be explained by the growth restriction factors and the solute *** Mg-5 Sn-1 Si-0.9 Sb alloy,the heterogeneous nuclei of Mg_(3) Sb_(2) phase is the main reason for the refinement of grains and second phases.

关键词： magnesium alloy Mg-5Sn-1Si alloy Y Bi Sb Sr Mg2Si phase

2D SnOx/SnS2的异质结构的忆阻器用于神经形态计算（英文）

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Science China Materials 2025年

作者：吴扬武李思凡季云翁正进邢厚英 Lester Arauz Travis Hu 洪金华 Kah-Wee Ang 刘松 State Key laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Department of Electrical and Computer Engineering National University of Singapore joint international research laboratory of Information Display and Visualization School of Electronic Science and Engineering Southeast University Department of Mechanical Engineering California State University Los Angeles 5151 State University Dr College of Materials Science and Engineering Hunan University Shenzhen research Institute Hunan University

层状金属二硫化物（LMDs）神经形态忆阻器为解决传统冯·诺依曼架构在速度和能效上的限制,提供了一个有前景的替代方案.然而由于环境稳定性,晶体LMDs忆阻器的阻变行为和操作电压仍面临挑战,这阻碍了神经网络硬件的开发.在此,我们通过臭...

层状金属二硫化物（LMDs）神经形态忆阻器为解决传统冯·诺依曼架构在速度和能效上的限制,提供了一个有前景的替代方案.然而由于环境稳定性,晶体LMDs忆阻器的阻变行为和操作电压仍面临挑战,这阻碍了神经网络硬件的开发.在此,我们通过臭氧处理控制氧化制备了SnOx/SnS2阻变层,优化了其阻变操作特性.该忆阻器表现出低的开关电压（～1 V）、快的开关速度（～20 ns）、高的开关比（10～2）,并具备模拟突触权重可塑性的能力.通过截面透射电子显微镜和X射线光谱等手段的分析,探测到了阻变开关层中的缺陷和Ti导电丝,这有助于实现均匀开关并减少操作可变性.此外,SnOx/SnS2忆阻器在MNIST手写识别中实现了90%的准确率,并成功地实现了基于忆阻器的图像卷积,展示了SnOx/SnS2忆阻器在神经形态应用中的潜力.

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