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Journal of Materials Science & Technology 2024年第1期168卷 62-70页

作者： Yifan Zhou Longqing Gao Haoyuan Chen Hao Wang Juan Zhang xiumin li Fangfang Duo Guoqing Guan School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Graduate School of Sustainable Community Studies Hirosaki University1-BunkyochoHirosaki 036-8560Japan Graduate School of Science and Technology Hirosaki University3-BunkyochoHirosaki 036-8561Japan Xinxiang University School of Chemistry&Materials EngineeringXinxiang 453003China Energy Conversion Engineering Laboratory Institute of Regional InnovationHirosaki University3-BunkyochoHirosaki 036-8561Japan

Amorphous high-entropy materials with abundant defects,coordinatively unsaturated sites,and loosely bonded atoms could exhibit excellent electrocatalytic performance.However,how to fabricate such ma-terials with nanostructure as well as amorphous structure is still full of challenges.In this work,high-entropy metal organic framework(HE-MOF)is employed as the self-sacrificial template to fabricate FeCoNiCuMnP x high-entropy phosphide/carbon(HEP/C)composites.The obtained composite shows a het-erostructured fusiform morphology,in which the HEP is encapsulated by a carbon layer,revealing high electron conductivity as well as rich catalytic active sites for oxygen evolution reaction(OER).Beside,it is found that there is a short-range ordered crystal structure in the amorphous phase,which is bene-ficial for revealing high OER catalytic activity as well as good stability.As a result,the optimum HEP/C composite shows an overpotential 239 mV@10 mA cm^(−2)with a small Tafel slope of 72.5 mV dec^(−1) for catalyzing OER in alkaline solution.

关键词： Water electrolysis Oxygen evolution reaction High-entropy MOFs High-entropy phosphides Amorphous structure

Electrocatalytic seawater splitting for hydrogen production:Recent progress and future prospects

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Journal of Materials Science & Technology 2023年第31期162卷 203-226页

作者： Changrui Feng Meng Chen Ziyuan Yang Zhengkun Xie xiumin li Shasha li Abuliti Abudula Guoqing Guan Graduate School of Science and Technology Hirosaki University3-BunkyochoHirosaki 036-8561Japan Energy Conversion Engineering Laboratory Institute of Regional InnovationHirosaki University3-BunkyochoHirosaki 036-8561Japan College of Chemistry Zhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China College of Chemical and Biological Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China

Earth-abundant seawater resource has become an attractive candidate to produce hydrogen from electrolysis,which is of great significance to realize hydrogen economy and carbon neutrality.Nonetheless,developing highly active and stable electrocatalysts to meet the needs of highly effective seawater splitting is still challenging for the sluggish oxygen evolution dynamics and the existed competitive reaction of chlorine evolution reaction(CER).To this end,some newly-developed electrocatalysts with superior performance,such as noble metals,alloy,transition metals,oxides,carbides,nitrides,phosphides,and so on,have been synthesized for the seawater splitting in recent years.This review starts from the historical background and fundamental mechanisms,and summarizes the most recent progress in the development of seawater electrolysis technologies.Some existing issues in the process of seawater electrolysis are enumerated and the corresponded solutions are presented.The future of hydrogen production from seawater electrolysis,especially the design and synthesis of novel catalysts for seawater electrolysis,is prospected.

关键词： Seawater electrolysis Electrocatalysts Hydrogen production Oxygen evolution reaction Chlorine evolution reaction Selectivity

High entropy materials based electrocatalysts for water splitting:Synthesis strategies,catalytic mechanisms,and prospects

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Nano Research 2023年第4期16卷 4411-4437页

作者： xiumin li Yifan Zhou Changrui Feng Ran Wei Xiaogang Hao Keyong Tang Guoqing Guan School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Graduate School of Sustainable Community Studies Hirosaki University1-BunkyochoHirosaki 036-8560Japan Graduate School of Science and Technology Hirosaki University3-BunkyochoHirosaki 036-8561Japan Department of Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China Energy Conversion Engineering Laboratory Institute of Regional InnovationHirosaki University3-BunkyochoHirosaki 036-8561Japan

Among various electrocatalysts,high entropy materials(HEMs)have attracted great attention due to the distinctive designing concept and unique properties with captivating electrocatalytic activity and stability.To date,HEMs have been a new family of advanced electrocatalysts in the research field of water electrolysis.In this work,the structural features and synthesis strategies of high entropy catalysts are reviewed,especially,their performances for catalyzing hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in water electrolysis are presented,in which the crucial roles of structure,composition,multisites synergy,and“four core effects”for enhancing catalytic activity,stability,and resistance of electrochemical corrosion are introduced.Besides,the design tactics,main challenges,and future prospects of HEM-based electrocatalysts for HER and OER are discussed.It is expected to provide valuable information for the development of low-cost efficient HEM-based electrocatalysts in the field of water electrolysis.

关键词： water electrolysis high entropy electrocatalysts synthesis strategies catalytic mechanisms prospects

Interface engineering of Fe-Co_(3)N/CoP composite with N-doped C by using soybean:Fabrication of efficient electrocatalysts for oxygen evolution reaction

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Carbon Resources Conversion 2023年第2期6卷 98-105页

作者： Longqing Gao xiumin li Chao Tang Tianshuo Xie Zhengkun Xie Haimei li Guoqing Guan Jie liu Keyong Tang School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001PR China College of Chemistry Zhengzhou UniversityZhengzhou 450001PR China Energy Conversion Engineering Laboratory Institute of Regional InnovationHirosaki University3-BunkyochoHirosaki 036-8561Japan

Soybean can serve as an efficient carbon and nitrogen source for in-situ fabrication of efficient composite electrocatalysts with conductive nitrogen-doped carbon(N-C)material.In this study,the iron-doped cobalt nitride/phosphide(Fe-Co_(3)N/CoP)nanosheet was composited with a conductive N-C material by using soybean as C and N source,as well as NH3 as additional nitrogen source.During the nitridation process of Fe-Co_(3)N,N-C bond was formed as a newly generated Co(Fe)-N-C active sites.Therefore,it fabricates a good microscopic contact interface between the catalyst and carbon material for charge transfer.Besides,the introduction of Fe-CoP by partially phosphating Fe-Co_(3)N further improved the OER activity due to the high catalytic activity of Co sites with high valence state.As a result,the obtained electrocatalyst exhibited overpotentials as low as 285 and 390 mV for supporting 10 and 100 mA/cm􀀀2 current densities.This work indicates that the design of materials with good interfaces could be an effective approach for the preparation of electrocatalysts for water electrolysis.

关键词： Water electrolysis Oxygen evolution reaction Co_(3)N CoP Co-N-C Soybean template

Efficient and ecological leather processing: replacement of lime and sulphide with dispase assisted by 1-allyl-3-methylimidazolium chloride

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Journal of Leather Science and Engineering 2022年第1期4卷 201-213页

作者： Hui liu Keyong Tang xiumin li Jie liu Xuejing Zheng Ying Pei School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China Department of Packaging Engineering Henan University of Science and TechnologyLuoyang 471023People’s Republic of China.

Leather is a collagen-based biomass prepared from raw skins or hides by a series of unit operations, in which the unhairing and fiber opening are extremely important operations. However, the conventional Na2S/Ca(OH)2 system used in unhairing and fiber opening has given rise to the pollution to the environment. It is necessary to develop substitute technology for the Na2S/Ca(OH)2. In the present study, 1-allyl-3-methylimidazolium chloride ([AMIm]Cl) was used to cooperate with dispase for cycle unhairing and one-pot beamhouse to recycle waste bovine hides and com-pared with conventional processing. During those processes, the mechanism of [AMIm]Cl-dispase synergistic unhair-ing and collagen fibers opening were studied. Besides, plant hazard, organic matter and [AMIm]Cl of wastewater from [AMIm]Cl-dispase process were respectively investigated and separated to evaluate the environmental and economic benefits of the [AMIm]Cl-dispase process. As a result, enzyme activity after unhairing by [AMIm]Cl-diapase system for using 5 times is higher than that by KCl-dispase system, and needs lower unhairing time, which is because of rapid penetration of [AMIm]Cl-dispase solution in bovine hides. For this reason, the tensile strength and elastic modulus of tanned leather from [AMIm]Cl-dispase process are higher than those from the KCl-diapase and conventional pro-cesses, and its hydrothermal shrinkage temperature is comparable to that of the conventional one. Because of the 58.13% lower wastewater discharge (WD), 66.60% lower total solids (TS), 97.23% lower ammonia nitrogen (NH3-N), non-toxic wastewater and organic matter recovery in wastewater are reached from [AMIm]Cl-dispase process, which is expected to be an alternative to the conventional process to reduce environmental pollution and realize the sustainable development of technology for leather manufacturing.

关键词： 1-Allyl-3-methylimidazolium chloride Dispase Bovine hides Leather making Recycling Bioresource

Nanostructured amorphous Fe_(29)Co_(27)Ni_(23)Si_(9)B_(12) high-entropy-alloy:an efficient electrocatalyst for oxygen evolution reaction

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Journal of Materials Science & Technology 2021年第9期68卷 191-198页

作者： Hongyan Wang Ran Wei xiumin li Xuli Ma Xiaogang Hao Guoqing Guan School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Department of Environmental Science and Engineering Taiyuan University of Technology.Taiyuan 030024China Department of Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China Energy Con version Engineering Laboratory Institute of Regional InnovationHirosaki University2-1-3 MatsubaraAomori 030-0813Japan

Proximal configu ration of dissimilar metal atoms in amorphous high-entropy-alloys(HEAs) always re sult in interatomic d-band ligand effect,dense defect distribution,coordinatively unsaturated sites,high potential energy,and loose atom bonding.Herein,nanostructured amorphous Fe_(29)Co_(27)Ni_(23)Si_(9)B_(12) HEA ribbon is fabricated via a melt spinning method combined with electrochemical corrosion etching process,which is applied as the potential oxygen evolution reaction electrocatalyst.It is found that there are micro/nano pits on the surface of etched amorphous Fe_(29)Co_(27)Ni_(23)Si_(9)B_(12) ribbons.Various elements of HEAs bond with each other to form a highly disordered configu ration,which could result in an optimized bonding energy and enhanced intrinsic catalytic activity.The electrocatalysis activity measurements indicate that the amorphous HEA endows a much higher activity than the crystalline one,which is further improved by the electrochemical etching treatment.Especially,the HEA ribbon etched for 3 h requires a low overpotential of 230 mV to afford 10 mA cm^(-2) current density.In addition,density functional theory calculations demonstrate that the amorphous structure can weaken the interaction between the surface of Fe_(29)Co_(27)Ni_(23)Si_(9)B_(12) alloy and the intermediates,leading to an optimized adsorption Gibbs free energy.

关键词： Water splitting High-entropy-alloys Oxygen evolution reaction Electro-catalyst

企业数字化转型与财务绩效--来自上市公司数字专利数据的证据

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技术经济 2024年第1期43卷 73-87页

作者：李秀敏陈梓烁陈雅琪广东工业大学经济学院广州510520 广东工业大学数字经济与数据治理重点实验室广州510520

作为“数字中国”战略的重要建设内容,企业数字化转型能否带来正向的财务回报,已成为业界重点关注问题。本研究以2010—2022年中国A股上市公司为研究样本,创新性地使用上市公司数字技术专利拥有量来衡量数字化转型,并详细分析数字化转... 详细信息

作为“数字中国”战略的重要建设内容,企业数字化转型能否带来正向的财务回报,已成为业界重点关注问题。本研究以2010—2022年中国A股上市公司为研究样本,创新性地使用上市公司数字技术专利拥有量来衡量数字化转型,并详细分析数字化转型对财务绩效的影响机制。研究发现:数字化转型可以有效地改善财务绩效,且该结论在经过稳健性检验后依旧成立;数字化转型通过提升运营效率、优化内部治理、降低经营风险和信息不对称、缓解融资约束来提升企业的财务绩效;大型企业转型程度越高,对财务绩效的促进作用越强。其无论是选择自主研发还是引进方式实现数字化转型,对财务绩效均具有显著的促进作用。而中小型企业数字化转型与财务绩效之间存在“倒U型”关系,其通过引进方式实现数字化转型更能促进财务绩效的提升;对于处于财务困境和竞争激烈环境中的企业,数字化转型对其财务绩效的促进作用将更加显著。此外,企业所处的外部环境越优越,这种促进作用也会越强。

关键词：数字经济数字化转型数字技术专利财务绩效

A combined kinetic study on the pyrolysis of chrome shavings by thermogravimetry

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Carbon Resources Conversion 2020年第1期3卷 156-163页

作者： Jie liu Lan Luo Zonghui Zhang Yadi Hu Fang Wang xiumin li Keyong Tang School of Materials Science and Engineering Zhengzhou UniversityZhengzhouHenan 450001China

Chrome shavings(CS),a kind of solid wastes discharged from tanneries,always pose serious environmental problems due to the presence of chromium.In this work,kinetic study of the pyrolysis of CS was investigated using a thermogravimetric analyzer in nitrogen atmosphere.The results obtained from the thermogravimetric analysis indicated that there are three stages in the temperature range 25 to 600℃.The second stage is the main weight loss stage and it could be mainly attributed to the pyrolysis of collagenous materials.Iso-conversional and generalized master-plots method were first employed to estimate the activation energy value and possible reaction mechanism of CS pyrolysis.The results showed that the pyrolysis process could not be described accurately by single-step reaction due to the heterogeneous nature of CS.Afterwards,the thermogravimetric kinetic of CS pyrolysis was studied using combined kinetic analysis.It was found that three-parallel-reaction model allowed better fitting relevance for CS pyrolysis.This information was important for simulating and predicting the pyrolysis behaviors of CS.

关键词： Chrome shavings Combined kinetics Pyrolysis Thermogravimetry

Assessment of estrogen disrupting potency in animal foodstuffs of China by combined biological and chemical analyses

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Journal of Environmental Sciences 2014年第10期26卷 2131-2137页

作者： Jun Wang Wei Xia Yonghua Xiao Chenjiang Ying Jia Long Hui Zhang Xi Chen Congda Mao xiumin li lin Wang Shunqing Xu Key Laboratory of Environment and Health Ministry of Education & Ministry of Environmental Protection and State Key Laboratory of Environmental Health (Incubating) School of Public Health Tongji Medical College Huazhong University of Science and Technology The Clinical Laboratory Department of Jiaozhou Central Hospital of Qingdao Wuhan City Center for Disease Prevention and Control

Food has been documented as one of major routes for human exposure to environmental estrogens（EEs）, but information on the occurrence of EEs in animal foodstuffs is still scarce.This study analyzed estrogenic activity in 16 types of animal foodstuffs（n = 142） collected from four cities（Wuhan, Guangzhou, Wenzhou and Yantai） of China by combined yeast estrogen screen（YES） bioassay and chemical analysis. By bioassay, all samples＇ extracts were found to induce estrogenic activities and the bioassay-derived 17β-estradiol equivalent（EEQbio） ranged from 8.29 to 118.32 ng/g. In addition, the samples were analyzed by liquid chromatography coupled to tandem mass spectrometry for further chemical analysis. 17β-Estradiol was found in all samples in this survey at levels of 0.44 to 15.04 ng/g.All samples had 33.1% detection rate of 17α-ethinylestradiol（EE2）, and the maximum concentration was 2.80 ng/g. Bisphenol A and 4-nonylphenols were detected in 83.8% and83.1% of samples, with concentrations up to 12.56 ng/g and 35.76 ng/g, respectively.However, the concentrations of estrone, diethylstilbestrol and 4-t-octylphenol were found to be below the limit of detection. A comparison of EEQbiomeasured from the YES assay and EEQchemcalculated from chemical analysis showed good correlation（R2= 0.84）. Based on the results, the YES assay can be used as a rapid pre-screening method for monitoring the levels of estrogenic activity in large numbers of animal foodstuffs, and chemical analysis used in combination can be used for the identification of specific EEs.

关键词： Environmental estrogen Yeast estrogen screen LC–MS/MS Animal foodstuffs

国家大基金对中国人工智能芯片产业创新绩效的影响

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科技管理研究 2024年第9期44卷 63-74页

作者：李秀敏陈雅琪陈梓烁广东工业大学经济学院广东广州510520 广东工业大学数字经济与数据治理重点实验室广东广州510520

利用2008—2021年中国268个城市的人工智能(AI)芯片专利数据,以国家大基金作为一项准自然实验,使用多期双重差分方法实证分析国家大基金对AI芯片产业创新绩效的影响及作用机制。研究发现,国家大基金能显著提升AI芯片技术创新数量和技术... 详细信息

利用2008—2021年中国268个城市的人工智能(AI)芯片专利数据,以国家大基金作为一项准自然实验,使用多期双重差分方法实证分析国家大基金对AI芯片产业创新绩效的影响及作用机制。研究发现,国家大基金能显著提升AI芯片技术创新数量和技术创新质量,引导效应是国家大基金促进AI芯片产业创新绩效提升的重要机制;国家大基金对AI芯片产业创新绩效的影响存在异质性,对产业链下游、东部地区、高等级城市和创新环境好的城市促进效果更优。

关键词：国家大基金政府产业投资基金 AI芯片产业创新绩效多期双重差分