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Modification strategies on nickel-based electrocatalysts for energyefficient anodic reactions

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Nano Research 2025年第1期18卷 50-75页

作者： Jingwen Yu yunliang liu Naiyun liu Yaxi Li Yuanyuan Cheng Peng Cao Yixian liu Xinya Yuan Xinyue Zhang Haitao Li Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China

Electrocatalytic chemical oxidation(ECO)is an energy-efficient anodic reaction alternative to the oxygen evolution reaction(OER).ECO lowers the reaction potential and yields higher-value fine chemicals at the *** catalyst material plays a crucial role in influencing and determining ECO *** catalyst performance encompasses aspects such as activity,stability,selectivity and *** electrocatalysts have garnered significant attention for their exceptional performance and widespread use in ECO *** modifying nickel-based electrocatalysts,the formation of NiOOH active centers can be *** such as adjusting size and morphology,doping,introducing defects and constructing heterojunctions are advantageous for enhancing *** the rapid advancements in related research fields,it is imperative to comprehend the mechanisms of nickel-based electrocatalysts in ECO and develop innovative *** article provides an overview of the modification strategies of nickel-based electrocatalysts,as well as their applications and mechanisms in ECO.

关键词： anodic reactions electrocatalytic chemical oxidation nickel-based electrocatalysts NiOOH modification strategies

Energy and carbon performance of urban buildings using metamodeling variable importance techniques

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Building Simulation 2021年第3期14卷 535-547页

作者： yunliang liu Wei Tian Xiang Zhou School of Mechanical Engineering Tongji UniversityShanghai 200092China Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry&Food Machinery and Equipment College of Mechanical EngineeringTianjin University of Science and TechnologyTianjin 300222China Tianjin International Joint Research and Development Center of Low-Carbon Green Process Equipment Tianjin 300222China

Global urbanization causes more environmental stresses in cities and energy efficiency is one of major concerns for urban *** variable importance techniques have been widely used in building energy analysis to determine key factors influencing building energy *** of these applications,however,use only one type of variable importance ***,this paper proposes a procedure of conducting two types of variable importance analysis(predictive and variance-based)to determine robust and effective energy saving measures in urban *** two variable importance methods belong to metamodeling techniques,which can significantly reduce computational cost of building energy simulation models for urban *** predictive importance analysis is based on the prediction errors of metamodels to obtain importance rankings of inputs,while the variance-based variable importance can explore non-linear effects and interactions among input variables based on variance *** campus buildings are used to demonstrate the application of the method proposed to explore characteristic of heating energy,cooling energy,electricity,and carbon emissions of *** results indicate that the combination of two types of metamodeling variable importance analysis can provide fast and robust analysis to improve energy efficiency of urban *** carbon emissions can be reduced approximately 30%after using a few of effective energy efficiency measures and more aggressive measures can lead to the 60%of reduction of carbon ***,this research demonstrates the application of parallel computing to expedite building energy analysis in urban environment since more multi-core computers become increasingly available.

关键词： urban buildings variable importance metamodeling energy performance carbon emissions

Fe-doped SnO_(2) nanosheet for ambient electrocatalytic nitrogen reduction reaction

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Nano Research 2022年第7期15卷 6026-6035页

作者： Yaxi Li Yixian liu Xiang liu yunliang liu Yuanyuan Cheng Peng Zhang Peiji Deng Jiujun Deng Zhenhui Kang Haitao Li Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China Institute of Medicine&Chemical Engineering Zhenjiang CollegeZhenjiang 212000China Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of EducationInstitute of Environmental Research at Greater BayGuangzhou UniversityGuangzhou 510006China School of Physics The University of SydneySydneyNew South Wales 2006Australia Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou 215123China

Ammonia plays a vital role in the development of modern agriculture and *** to the conventional Haber–Bosch ammonia synthesis in industry,electrocatalytic nitrogen reduction reaction(NRR)is considered as a promising and environmental friendly strategy to synthesize ***,inspired by biological nitrogenase,we designed iron doped tin oxide(Fe-doped SnO_(2))for nitrogen *** this work,iron can optimize the interface electron transfer and improve the poor conductivity of the pure SnO_(2),meanwhile,the synergistic effect between iron and Sn ions improves the catalyst *** the electrocatalytic NRR test,Fe-doped SnO_(2) exhibits a NH_(3) yield of 28.45μg·h^(−1)·mgcat^(−1),which is 2.1 times that of pure SnO_(2),and Faradaic efficiency of 6.54%at−0.8 V *** in 0.1 M Na_(2)SO_(4).It also shows good stability during a 12-h long-term stability *** functional theory calculations show that doped Fe atoms in SnO_(2) enhance catalysis performance of some Sn sites by strengthening N–Sn interaction and lowering the energy barrier of the rate-limiting step of *** transient photovoltage test reveals that electrons in the low-frequency region are the key to determining the electron transfer ability of Fe-doped SnO_(2).

关键词： electrocatalyst nitrogen reduction reaction Fe-doped SnO_(2)

ENERGY ASSESSMENT OF URBAN BUILDINGS BASED ON GEOGRAPHIC INFORMATION SYSTEM

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Journal of Green Building 2020年第3期15卷 83-93页

作者： Wei Tian Chuanqi Zhu yunliang liu Baoquan Yin Jiaxin Shi College of Mechanical Engineering Tianjin University of Science and TechnologyTianjinChina300222 Tianjin International Joint Research and Development Center of Low-Carbon Green Process Equipment Tianjin 300222China School of Mechanical Engineering Tongji UniversityShanghaiChina200092 Tianjin Architecture Design Institute TianjinChina300074

Urban building energy analysis has attracted more attention as the population living in cities increases as does the associated energy consumption in urban *** paper proposes a systematic bottom-up method to conduct energy analysis and assess energy saving potentials by combining dynamic engineering-based energy models,machine learning models,and global sensitivity analysis within the GIS(Geographic Information System)environment for large-scale urban *** method includes five steps:database construction of building parameters,automation of creating building models at the GIS environment,construction of machine learning models for building energy assessment,sensitivity analysis for choosing energy saving measures,and GIS visual evaluation of energy saving *** buildings in Tianjin(China)are used as a case study to demonstrate the application of the method proposed in this *** results indicate that the method proposed here can provide reliable and fast analysis to evaluate the energy performance of urban buildings and determine effective energy saving measures to reduce energy consumption of urban ***,the GIS-based analysis is very useful to both create energy models of buildings and display energy analysis results for urban buildings.

关键词： urban buildings energy model machine learning model Geographic Information System(GIS) sensitivity analysis

Carbon armour with embedded carbon dots for building better supercapacitor electrodes

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Nano Research 2023年第5期16卷 6815-6824页

作者： Yuanyuan Cheng Yixian liu Chen Chu yunliang liu Yaxi Li Ruqiang Wu Jianchun Wu Chunqiang Zhuang Zhenhui Kang Haitao Li Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Institute of Nuclear Science and Technology Sichuan UniversityChengdu 610064China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou 215123China

The microstructure design of electrode material is a crucial point to optimize the supercapacitor’s electrochemical *** this work,a Bi-based nanocomposite with a three-layer structure(Bi–Bi_(2)O_(3)@carbon armour(CA)/carbon dots(CDs))is synthesized and *** material inherits high capacitance and high activity from bismuth-based materials,the coated CA protects the structure from complete oxidization and improves surface ***,CDs in CA can enhance the ion conduction efficiency between the catalyst,carbon membrane,*** a consequence,the specific capacitance of the electrode reaches 973 F·g^(−1)under 1 A·g^(−1),the energy density achieves 32.5 Wh·kg^(−1)with a power density of 266.9 W·kg^(−1),with impressive electrochemical stability that Coulomb efficiency of the electrode remains about 100%after 5000 ***,in-situ Fourier transformation infrared(FT-IR)analyzes the structure evolvement of the material during synthesis and finds that the annealing process of the material removes a great number of oxygen-containing groups of CA and CDs,generating oxygen vacancies,defects,thus active sites,which enhance the capacitance of the material.

关键词： supercapacitor carbon armour Bi–Bi_(2)O_(3)interface carbon dots

A core-satellite structured type Ⅱ heterojunction photocatalyst with enhanced CO_(2) reduction under visible light

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Nano Research 2022年第10期15卷 8880-8889页

作者： Yuanyuan Cheng Yixian liu yunliang liu Yaxi Li Ruqiang Wu Yongchao Du Najmeh Askari Naiyun liu Fen Qiao Chenghua Sun Zhenhui Kang Haitao Li Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China Faculty of Science Engineering&TechnologySwinburne University of TechnologyVictoria 3122Australia Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou 215123China

Photocatalytic reduction of carbon dioxide into valuable chemicals is a sustainable and promising technology that alleviates the greenhouse effect and energy *** this study,the Mn_(3)O_(4)/FeNbO_(4) type Ⅱ heterojunction photocatalyst with a core-satellite structure was synthesized by the facile soft chemical *** formation of a nano-heterojunction is supposed to effectively improve light capture,charge transfer,and interfacial charge separation in the photochemical ***,the heterojunction has a good ability to capture and activate CO_(2).Our results show that the prepared Mn_(3)O_(4)/FeNbO_(4) photocatalyst exhibit obvious enhanced catalytic properties in the photocatalytic CO_(2) reduction reaction,where the CH_(4) yielding rate is 1.96 and 9.81 times those of FeNbO_(4) and Mn_(3)O_(4),*** transient photovoltage test(TPV)shows that the low frequency electrons are crucial to the effective transfer of photogenerated electrons and holes in the Mn_(3)O_(4)/FeNbO_(4) nano *** of in situ Fourier transform infrared spectroscopy(FTIR)verifies the effective CO_(2) adsorption on the Mn_(3)O_(4)/FeNbO_(4) surface and the high selectivity of CH_(4) *** properties of the Mn_(3)O_(4)/FeNbO_(4) photocatalyst infer its broad prospects in the fields of carbon fixation and energy conservation.

关键词： typeⅡheterojunction Mn_(3)O_(4)/FeNbO_(4) photocatalysis CO_(2)reduction

BiVO_(4)/TiO_(2) heterojunction with rich oxygen vacancies for enhanced electrocatalytic nitrogen reduction reaction

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Frontiers of physics 2021年第5期16卷 173-182页

作者： yunliang liu Peiji Deng Ruqiang Wu Ramadan A.Geioushy Yaxi Li Yixian liu Fengling Zhou Haitao Li Chenghua Sun Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang212013China Nanomaterials and Nanotechnology Department Advanced Materials DivisionCentral Metallurgical R&D Institute(CMRDI)P.O.Box87 Helwan11421CairoEgypt College of Chemical Engineering and Energy Technology Dongguan University of TechnologyDongguan523808China Guangxi Key Laboratory of Electrochemical Energy Materials Guangxi UniversityNanning530004China Faculty of Science Engineering&TechnologySwinburne University of TechnologyVictoria3122Australia Faculty of Engineering The University of SydneySydneyAustralia

The large-scale production of ammonia mainly depends on the Haber-Bosch process,which will lead to the problems of high energy consumption and carbon dioxide *** nitrogen fixation is considered to be an environmental friendly and sustainable process,but its efficiency largely depends on the activity and stability of the ***,it is imperative to develop high-efficient electrocatalysts in the field of nitrogen reduction reaction(NRR).In this paper,we developed a BiVO_(4)/TiO_(2) nanotube(BiVO_(4)/TNT)heterojunction composite with rich oxygen vacancies as an electrocatalytic NRR *** heterojunction interface and oxygen vacancy of BiVO_(4)/TNT can be the active site of N2 dynamic activation and proton *** synergistic effect of TiO_(2) and BiVO_(4) shortens the proton transport path and reduces the over potential of chemical ***_(4)/TNT has high ammonia yield of 8.54µg·h^(−1)·cm^(−2) and high Faraday efficiency of 7.70%in−0.8 V *** in 0.1 M Na_(2)SO_(4) solution.

关键词： TiO_(2)nanotubes BiVO_(4) interface oxygen vacancy NRR

Mechanochemical route to fabricate an efficient nitrate reduction electrocatalyst

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Nano Research 2024年第6期17卷 4889-4897页

作者： yunliang liu Zhiyu Zheng Sobia Jabeen Naiyun liu Yixian liu Yuanyuan Cheng Yaxi Li Jingwen Yu Xin Wu Nina Yan Lei Xu Haitao Li Institute for Energy Research School of Energy and Power EngineeringJiangsu UniversityZhenjiang 212013China Jiangsu Engineering Technology Research Center of Biomass Composites and Addictive Manufacturing Institute of Agricultural Facilities and EquipmentJiangsu Academy of Agricultural SciencesNanjing 210014China Key Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River Ministry of Agriculture and Rural AffairsNanjing 210014China

The electrochemical nitrate reduction reaction(NO_(3)RR)to ammonia under ambient conditions is a promising approach for addressing elevated nitrate levels in water bodies,but the progress of this reaction is impeded by the complex series of chemical reactions involving electron and proton transfer and competing hydrogen evolution ***,it becomes imperative to develop an electro-catalyst that exhibits exceptional efficiency and remarkable selectivity for ammonia synthesis while maintaining long-term *** the magnetic biochar(Fe-C)has been synthesized by a two-step mechanochemical route after a pyrolysis treatment(450,700,and 1000℃),which not only significantly decreases the particle size,but also exposes more oxygen-rich functional groups on the surface,promoting the adsorption of nitrate and water and accelerating electron transfer to convert it into *** showed that the catalyst(Fe-C-700)has an impressive NH_(3)production rate of 3.5 mol·h^(−1)·gcat^(−1),high Faradaic efficiency of 88%,and current density of 0.37 A·cm^(−2)at 0.8 V *** hydrogen electrode(RHE).In-situ Fourier transform infrared spectroscopy(FTIR)is used to investigate the reaction intermediate and to monitor the *** oxygen functionalities on the catalyst surface activate nitrate ions to form various intermediates(NO_(2),NO,NH_(2)OH,and NH_(2))and reduce the rate determining step energy barrier(*NO_(3)→*NO_(2)).This study presents a novel approach for the use of magnetic biochar as an electro-catalyst in NO_(3)RR and opens the road for solving environmental and energy challenges.

关键词： mechanochemical route magnetic biochar electron transfer nitrate ammonia

Photo-responsive shape memory polymer composites enabled by doping with biomass-derived carbon nanomaterials

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Nano Research 2022年第2期15卷 1383-1392页

作者： Nina Yan Zhiyu Zheng yunliang liu Xizhi Jiang Jiamin Wu Min Feng Lei Xu Qingbao Guan Haitao Li Institute of Agricultural Facilities and Equipment Jiangsu Academy of Agricultural SciencesKey Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze RiverMinistry of Agriculture and Rural AffairsNanjing 210014China Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials International Joint Laboratory for Advanced Fiber and Low-dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China

As photothermal conversion agents,carbon nanomaterials are widely applied in polymers for light-triggered shape memory behaviors on account of their excellent light ***,they are usually derived from non-renewable fossil resources,which go against the demand for sustainable ***-derived carbon nanomaterials are expected as alternatives if they are designed with good dispersibility as well as splendid photothermal *** to date,very few researches focused on this ***,we report a novel light-triggered shape memory composite by incorporating renewable biomass-derived carbon nanomaterials into acrylate polymers without deep purification and *** functionalized carbon nanomaterials not only have stable dispersion in polymers as fillers,but also can endow the polymers with excellent and stable thermal and photothermal responsive properties in biological friendly *** the introduction of biomass-derived carbon nanomaterials,the mechanical properties of the composites are also further enhanced with the formation of hydrogen bonding between the carbon nanomaterials and the ***,the doping of 1%carbon nanomaterials endows the polymer with sufficient hydrogen bonds that not only exhibit excellent thermal and photothermal responsive properties,but also with enough space for the motion of *** properties make such composite a promising and safe candidate for shape memory applications,which provide a new avenue in smart fabrics or intelligent soft robotics.

关键词： biomass carbon nanomaterials shape memory polymers thermal responsive photothermal responsive