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Science China Materials 2025年第1期68卷 173-179页

作者： Yongxia Shi junjun li Zhiwen Min Xinyi Wang Man Hou Hao Ma Zechao Zhuang Yuchen Qin Yuanmiao Sun Dingsheng Wang Zhicheng Zhang Key Laboratory of Organic Integrated Circuit Ministry of Education&Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Chemistry Tsinghua UniversityBeijing 100084China College of Sciences Henan Agricultural UniversityZhengzhou 450000China

Rationally modulating the adsorption configuration of the key*CO intermediate could facilitate carbon±carbon(C±C)coupling to generate multi-carbon products in the electrochemical CO_(2) reduction *** this work,theoretical calculations reveal that C±C coupling via atopadsorbed*CHO and hollow-adsorbed*CO over Cu sites is an energetically favorable *** a proof of concept,a tandem trimetallic AuAgCu heterojunction(Au@Ag/Cu)was prepared,where the atop-adsorbed*CO over Au@Ag sites could migrate to Cu sites with hollow adsorption configuration,and then the asymmetric C±C coupling via transferred hollow-adsorbed*CO and existed atop-adsorbed*CHO over Cu sites facilitates the formation of the ethanol product,exhibiting a maximum Faraday efficiency of 65.9%at a low potential of−0.3 V *** hydrogen *** work provides new insights into the intrinsic understanding of tandem catalysis by regulating adsorption configuration of the intermediate products.

关键词： CO_(2)electroreduction C–C coupling tandem catalysis adsorption configuration ethanol

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利用遥感智能解译测度中国传统民居的相似性

地理科学 2025年第1期45卷 202-213页

作者：谷宇陈怡帆邓伟环李筠筠李郇中山大学地理科学与规划学院中国区域协调发展与乡村建设研究院广东广州510275

卫星遥感具有覆盖范围大、时空标准统一等优势,为研究传统民居整体性的传承与变化提供了数据基础;然而,当前传统民居研究中的遥感解译主要依赖于人工目视和手工转绘,其深度和效率无法满足需求,如何基于遥感智能解译实现传统民居相似性... 详细信息

卫星遥感具有覆盖范围大、时空标准统一等优势,为研究传统民居整体性的传承与变化提供了数据基础;然而,当前传统民居研究中的遥感解译主要依赖于人工目视和手工转绘,其深度和效率无法满足需求,如何基于遥感智能解译实现传统民居相似性测度亟待解决。本文提出了一种遥感智能解译的传统民居相似性测度方法,能够融合传统民居专家知识和深度学习模型,以79.1%的总体分类精度和77.1%的表征能力,有效提取传统民居关键特征。在此基础上,以客家民系为视角,测度全国尺度下的客家民居相似性;结合移民史、古驿道和村志记载,分析明清时期南方人口迁徙对客家民居相似性变化的整体性影响,为传统民居和人口迁徙研究提供新视角。

关键词：中国传统民居人口迁徙卫星遥感深度学习特征相似性

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Achievements, challenges and opportunities in hydrogen production fromwater/seawater splitting using boron-based materials

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Science China Materials 2025年第2期68卷 341-363页

作者： Yiran Zhang Yang Xu Qi Zhou junjun li Xinyi Wang Zhenwei Zhao Zhicheng Zhang Key Laboratory of Organic Integrated Circuits Ministry of Education&Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin UniversityTianjin 300072China Department of Chemistry Tsinghua UniversityBeijing 100084China

Water splitting is recognized as an environmentally friendly and feasible method to produce ***, the high cost, low storage capacity, and poorstability of traditional noble metal-based electrocatalysts haveseverely limited the industrial application of electrocatalyticwater splitting. The utilization of seawater splitting not onlyfacilitates the production of high-purity hydrogen on a largescale but also concurrently promotes the desalination *** the past decades, transition metal borides (TMBs) havebeen widely used in the field of water splitting due to theadvantages of simple preparation process, good stability, andeasily adjustable composition. This review summarizes therecent progress of TMBs in the electrolysis of water and ***, the influencing factors of electrocatalytic performance and related evaluations are introduced. The basicprinciples of hydrogen evolution reaction, oxygen evolutionreaction, and chlorine evolution reaction in seawater electrolysisare discussed in detail, pointing out the various problemscaused by chloride ions (Cl^(−)) in the process of hydrogenproduction from seawater splitting. In addition, the preparation and optimization strategies of TMBs are ***, the development, challenges, and prospects of electrolytic seawater hydrogen production technology are presented. This review aims to furnish deeper insights intoenhancing the electrocatalytic performance of TMBs in thiscritical area of research.

关键词： water/seawater splitting transition metal borides hydrogen production

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A New Classifier for Imbalanced Data Based on a Generalized Density Ratio Model

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Communications in Mathematics and Statistics 2023年第2期11卷 369-401页

作者： junjun li Wenquan Cui Department of Statistics and Finance School of ManagementUniversity of Science and Technology of ChinaHefei 230026People’s Republic of China

Achieving higher true positive rate when decreasing false positive rate is always a great challenge to the imbalance learning *** work combines penalized empirical likelihood method,lower bound algorithm and Nyströmmethod and applies these techniques along with kernel method to density ratio *** resulting classifier,density ratio classifier(DRC),is a combination of kernelization,regularization,efficient implementation and threshold moving,all of which are critical to enable DRC to be an effective and powerful method for solving difficult imbalance *** with other methods,DRC is competitive in that it is widely applicable and it is simple and easy to use without additional imbalance handling *** addition,the convergence rate of the estimate of log density ratio is discussed as *** the results of numerical analysis also show that DRC outperforms other methods in AUC and G-mean score.

关键词： Classifier Density ratio model Imbalance problems Kernel method ROC curve

Insight into the Effect of Metal Cations in the Electrolyte on Performance for Electrocatalytic CO_(2)Reduction Reaction

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Energy & Environmental Materials 2022年第4期5卷 1008-1009页

作者： junjun li Zhicheng Zhang Wenping Hu Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China

This highlight indicates that the local electrostatic interactions between metal cations and key intermediates facilitate the electrocatalytic CO_(2) reduction *** CO_(2) reduction reaction(CO_(2)RR)has been considere... 详细信息

关键词： CO_(2)reduction reaction electrocatalysis metal cations

Exclusive CO_(2)-to-formate conversion over single-atom alloyed Cu-based catalysts

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Green Energy & Environment 2022年第5期7卷 855-857页

Electrochemical CO_(2) reduction reaction(CO_(2) RR),powered by renewable energy sources,provides an appealing approach to convert emitted CO_(2) to value-added chemicals and fuels and achieve a carbon-neutral *** various carbon-based products,formic acid(HCOOH) has been considered as a promising liquid hydrogen storage material due to its high energy density and hydrogen ***,so far,the reported HCOOH-selective catalysts(e.g.,Bi,Sn,In,Pb and Pd) have failed in either activity(lity(lized feasibility of CO_(2) *** contrast,Cu takes the advantages of excellent activity and low cost,making it more commercially *** date,one of the most challenging issues of Cu-based catalysts lies in unsatisfactory selectivity,that is,tending to produce mixed products rather than specific one,due to the complicated reaction paths *** recently,Zheng et *** developed a single-atom alloy(SAAs) strategy for the exclusive CO_(2)-to-formate conversion over Cu-based *** as-prepared Pb single-atom alloyed Cu catalyst(Pb_(1)Cu)(***) exhibited near unity selectivity towards HCOOH and impressive stability,providing the prospect of industrial production of HCOOH from CO_(2).

关键词： selectivity stability neutral

Recent advances in carbon-based materials for electrochemical CO_(2) reduction reaction

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Chinese Chemical Letters 2022年第5期33卷 2270-2280页

作者： Zengqiang Gao junjun li Zhicheng Zhang Wenping Hu Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of Science&Collaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin 300072China

The increase of atmospheric CO_(2)concentration has caused many environmental ***-cal CO_(2)reduction reaction(CO_(2)RR)has been considered as a promising strategy to mitigate these *** electrocatalysts with a low overpotential,high Faradaic efficiency,and excellent selectivity are of great significance for the CO_(2)***-based materials including metal-free carbon catalysts and metal-based carbon catalysts have shown great potential in the CO_(2)RR,owing to the tailorable porous structures,abundant natural resources,resistance to acids and bases,high-temperature stability,and en-vironmental *** this review,various carbon materials including graphene,carbon nanotubes,quantum dots,porous carbon,and MOF-derived catalysts,etc.,for the CO_(2)RR have been ***,recent progress in terms of the mechanism and pathway of CO_(2)conversion has been com-prehensively ***,the opportunities and challenges of carbon-based electrocatalysts for the CO_(2)RR are proposed.

关键词： CO_(2)reduction Electrocatalysis Carbon materials Chemicals and fuels Single-atom catalysts

Recent Advances in Interface Engineering for Electrocatalytic CO_(2) Reduction Reaction

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Nano-Micro Letters 2021年第12期13卷 499-533页

作者： junjun li Sulaiman Umar Abbas Haiqing Wang Zhicheng Zhang Wenping Hu Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University and Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072People’s Republic of China Institute for Advanced Interdisciplinary Research(iAIR) University of JinanJinan 250022People’s Republic of China

Electrocatalytic CO_(2) reduction reaction(CO_(2) RR) can store and transform the intermittent renewable energy in the form of chemical energy for industrial production of chemicals and fuels,which can dramatically reduce CO_(2) emission and contribute to carbon-neutral cycle. E cient electrocatalytic reduction of chemically inert CO_(2) is challenging from thermodynamic and kinetic points of view. Therefore,low-cost,highly e cient,and readily available electrocatalysts have been the focus for promoting the conversion of CO_(2). Very recently,interface engineering has been considered as a highly e ective strategy to modulate the electrocatalytic performance through electronic and/or structural modulation,regulations of electron/proton/mass/intermediates,and the control of local reactant concentration,thereby achieving desirable reaction pathway,inhibiting competing hydrogen generation,breaking binding-energy scaling relations of intermediates,and promoting CO_(2) mass transfer. In this review,we aim to provide a comprehensive overview of current developments in interface engineering for CO_(2) RR from both a theoretical and experimental stand-point,involving interfaces between metal and metal,metal and metal oxide,metal and nonmetal,metal oxide and metal oxide,organic molecules and inorganic materials,electrode and electrolyte,molecular catalysts and electrode,etc. Finally,the opportunities and challenges of interface engineering for CO_(2) RR are proposed.

关键词： Interface engineering CO_(2)reduction reaction Electrocatalysis Heterostructure

Investigation of the Ce-Mn conversion coating on 6063 aluminium alloy

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Chinese Science Bulletin 2010年第29期55卷 3345-3349页

作者： ZHANG junjun li WenFang DU Jun HAN Dong ZHENG XiaoPing School of Materials Science and Engineering South China University of Technology Guangzhou 510640 China

In this paper,the sustainable Ce-Mn chemical conversion coating was fabricated on 6063 aluminium alloy by means of Ce(NO3)3 and KMnO4 as the inhibitors and NaF as the *** morphologies,composition and valence state of the coating were analyzed by scanning electron microscopy(SEM),energy dispersive spectrometry(EDS) and X-ray photoelectron spectroscopy(XPS),*** results indicated that the Ce-Mn conversion coating was *** anticorrosion of the coating was evaluated in 3.5 wt.% NaCl aqueous solution at room temperature by using polarization curve and electrochemical impedance spectroscopy(EIS).It indicated that the treated surface presented better anticorrosion behavior in chloride media than on the original material *** corrosion resistance of Ce-Mn conversion coating was about equal to the trivalent chromium conversion coating.

关键词： 6063铝合金高锰酸钾转化膜扫描电子显微镜耐腐蚀性能行政电化学阻抗谱氯化钠水溶液

A comprehensive first-principle study of borophene-based nano gas sensor with gold electrodes

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Frontiers of physics 2022年第1期17卷 183-189页

作者： Yueyue Tian Houping Yang junjun li Shunbo Hu Shixun Cao Wei Ren Yin Wang International Centre for Quantum and Molecular Structures and Department of Physics Shanghai UniversityShanghai200444China Hongzhiwei Technology(Shanghai)Co. Ltd.Shanghai201206China Materials Genome Institute Shanghai UniversityShanghai200444China

Using density functional theory combined with nonequilibrium Green’s function method,the transport properties of borophene-based nano gas sensors with gold electrodes are calculated,and comprehensive understandings regarding the effects of gas molecules,MoS2 substrate and gold electrodes to the transport properties of borophene are *** show that borophene-based sensors can be used to detect and distinguish CO,NO,NO2 and NH3 gas molecules,MoS2 substrate leads to a nonlinear behavior on the current-voltage characteristic,and gold electrodes provide charges to borophene and form a potential barrier,which reduced the current values compared to the current of the systems without gold *** studies not only provide useful information on the computationally design of borophene-based gas sensors,but also help understand the transport behaviors and underlying physics of 2D metallic materials with metal electrodes.

关键词： quantum transport borophene gold electrodes heterostructure

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