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distance effect of Ni-Pt Dual Sites for Active Hydrogen Transfer in Tandem Reaction

The Innovation 2020年第2期1卷 29-35,28页

作者： Huibin Wu Bin Zhang Haojie Liang Liming Zhai Guofu Wang Yong Qin State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001PR China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Unveiling the distance effect between different sites in multifunctional catalysts remains a major ***,we investigate the distance effect by constructing a dual-site distance-controlled tandem catalyst with a five-layered TiO2/Pt/TiO2/Ni/TiO2 tubular nanostructure by template-assisted atomic layer *** this catalyst,the Ni and Pt sites are separated by a porous TiO2 interlayer,and the distance between them can be precisely controlled on the subnanometer scale by altering the thickness of the interlayer,while the inner and outer porous TiO2 layers are designed for structural *** catalyst exhibits superior performance for the tandem hydrazine hydrate decomposition to hydrogen and subsequent nitrobenzene hydrogenation when the Ni and Pt site distance is on the subnanometer *** performance increases with the decrease of the distance and is better than the catalyst without the TiO2 *** and kinetic experiments reveal that the distance effect controls the transfer of active hydrogen,which is the rate-determining step of the tandem reaction in a water *** Ti species with oxygen vacancies on the TiO2 interlayer provide the active sites for hydrogen transfer with-Ti-OH surface intermediates via the continuous chemisorption/desorption of water.A smaller distance induces the generation of more active sites for hydrogen transfer and thus higher efficiency in the synergy of Ni and Pt *** work provides new insight for the distance effect of different active sites and the mechanism of intermediate transfer in tandem reactions.

关键词： distance effect DUAL SITES HYDROGEN TRANSFER INTERLAYER TANDEM CATALYST

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How the microenvironment dominated by the distance effect to regulate the FeN_(4)site ORR activity and selectivity?

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Nano Research 2024年第6期17卷 5735-5741页

作者： Peng Li Qingfeng Guo Jianrui Zhang Ruilin Chen Shujiang Ding Yaqiong Su School of Chemistry Engineering Research Center of Energy Storage Materials and Devices of Ministry of EducationNational Innovation Platform(Center)for Industry-Education Integration of Energy Storage TechnologyXi’an Jiaotong UniversityXi’an 710049China Huanghe Science and Technology College Zhengzhou 450063China General Research Institute of Engineering of Gotion High-Tech Hefei 230041China

The distance effect of the doped heteroatoms away from the catalytic centers has rarely been *** this work,we conducted density functional theory calculations to thoroughly investigate the influence of heteroatom(N,P,B,and S atoms)doping distance on the oxygen reduction reaction(ORR)activity of graphene-based FeN_(4)*** uncovered a Sabatier-like relationship between heteroatom doping distance and ORR activity of FeN_(4)*** nearest doping does not significantly improve and even block the ORR activity of FeN_(4)*** ORR activity is achieved when the heteroatoms are 4-5Å(N,P,and S atoms)or 6-7Å(B atoms)away from the Fe *** of electronic structure indicates that distance effect can modulate the local chemical environment of Fe atoms,thereby account for the changes in ORR activity along with the doping distance and doping *** study provides insights into the influence of heteroatom doping on the chemical environment of reaction active centers,and provides the theoretical guidance for controlling the doping distance of heteroatoms to achieve optimal catalytic activity and selectivity.

关键词： distance effect microenvironment heteroatom doping FeN_(4) Sabatier-like relationship structure-activity relationship

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Learning distance effect on lignite quality variables at global and local scales

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International Journal of Coal Science & Technology 2021年第5期8卷 856-868页

作者： Cem Yaylagul Bulent Tutmez Dodurga Control Directorate Turkish Coal Enterprises(TKI)CorumTurkey Department of Mining Engineering Inonu UniversityMalatyaTurkey

Determining scale and variable effects have critical importance in developing an energy resource *** study aims to explore the relationships in heterogeneous lignite sites using different scale models,spatial weighting as well as error-based pair-wise *** a statistical learning framework,the relationships among the quality variables such as geochemical variables and the contributions of the coordinates to quality measures have been exhibited by generalized additive *** this way,the critical roles of spatial weights provided by the coordinates have been specified at a global *** experimental studies reveal that incorporating the geological weighting in the models as the additional information improves both accuracy and *** relationships among lignite quality variables and sampling locations are spatially non-stationary,the local structure and interdependencies among the variables were analyzed by geographically weighting *** local analyses including spatial patterns of bandwidths,search domains as well as residual-based areal dependencies provided not only the critical zones but also availability of pair-wise model alternatives by calibrating a model at each point for location-specific parameter *** results completely show that the weighting models applied at different scales can take spatial heterogeneity into consideration and these abilities provide some meta-data and specific information using in sustainable energy planning.

关键词： Lignite distance effect Exploration Generalized Additive Model(GAM) Geographically Weighted Regression(GWR)

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effects of concentration, distance, and application methods of Altriset （Chlorantraniliprole） on eastern subterranean termite （Isoptera： Rhinotermitidae）

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Insect Science 2015年第3期22卷 451-460页

作者： Znar Barwary Austin Gorzlancyk Xing Ping Hu Department of Entomology and Plant Pathology Auburn University Auburn AL 36849-5413 USA

The effects of various concentrations, distance, and application methods of Altriset （Chlorantraniliprole） were investigated against one of the most destructive termites, the eastem subterranean termite, Reticulitermesflavipes Kollar. Three laboratory experiments were conducted. First, we examined the concentration effect of treating the soil contiguously to established foraging tunnels at a fixed 1 m distance. The results demonstrated 100% termite control in 19 d posttreatment at 100 and 50μg/g and 27% termite mortality at 25μg/g. Second, we tested the distance effect of the soil treatment （2 and 4 m） on the efficacy of Altriset to the satellite termite populations at a fixed 50/zg/g concentration. This resulted in 100% termite control in 22 d posttreatment at both 2 and 4 m. Third, we examined the effect of differing application methods using 12.5 and 25μg/g prior to the establishment of foraging tunnels at a fixed 1 m distance. This illustrated 100% termite control in 9 d posttreatment at 25μg/g and 12 d posttreatment at 12.5μg/g. The third experiment demonstrated soil treatments that were applied prior to termite tunnel establishment had greater efficacy than applications made post tunnel construction. Our results provide a comprehensive understanding about the efficacy of Altriset treatments on eastern subterranean termites.

关键词： application methods Chlorantraniliprole concentration effect distance effect Reticulitermesflavipes soil treatment

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Numerical magnitude processing in abacus-trained children with superior mathematical ability: an EEG study

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2015年第8期16卷 661-671页

作者： Jian HUANG Feng-lei DU Yuan YAO Qun WAN Xiao-song WANG Fei-yan CHEN Bio-X Laboratory Department of Physics Zhejiang University Department of Psychology and Behavioral Sciences Zhejiang University Heilongjiang Abacus Association

distance effect has been regarded as the best established marker of basic numerical magnitude processes and is related to individual mathematical abilities. A larger behavioral distance effect is suggested to be concomitant with lower mathematical achievement in children. However, the relationship between distance effect and superior mathematical abilities is unclear. One could get superior mathematical abilities by acquiring the skill of abacus-based mental calculation （AMC）, which can be used to solve calculation problems with exceptional speed and high accuracy. In the current study, we explore the relationship between distance effect and superior mathematical abilities by examining whether and how the AMC training modifies numerical magnitude processing. Thus, mathematical competencies were tested in 18 abacus-trained children （who accepted the AMC training） and 18 non-trained children. Electroencephalography （EEG） waveforms were recorded when these children executed numerical comparison tasks in both Arabic digit and dot array forms. We found that：（a） the abacus-trained group had superior mathematical abilities than their peers; （b） distance effects were found both in behavioral results and on EEG wave- forms; （c） the distance effect size of the average amplitude on the late negative-going component was different between groups in the digit task, with a larger effect size for abacus-trained children; （d） both the behavioral and EEG distance effects were modulated by the notation. These results revealed that the neural substrates of magnitude processing were modified by AMC training, and suggested that the mechanism of the representation of numerical magnitude for children with superior mathematical abilities was different from their peers. In addition, the results provide evidence for a view of non-abstract numerical representation.

关键词： Electroencephalography (EEG) Abacus training distance effect Numerical magnitude processing Child

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