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Tuning the atomic configuration environment of MnN_(4) sites by Co cooperation for efficient oxygen reduction

Journal of Energy Chemistry 2023年第7期82卷 547-559,I0012页

作者： Jing Wang Haihong Zhong Jun Yang Huiyu Li Pinggui Tang yongjun feng Dianqing Li State Key Laboratory of Chemical Resource Engineering Beijing Engineering Center for Hierarchical CatalystsCollege of ChemistryBeijing University of Chemical TechnologyBeijing 100029China College of Science Hainan UniversityHaikou 570228HainanChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Carbon-based N-coordinated Mn(Mn-N_(x)/C)single-atom electrocatalysts are considered as one of the most desirable non-precious oxygen reduction reaction(ORR)candidates due to their insignificant Fenton reactivity,high abundance,and intriguing electrocatalytic performance.However,current MnN_(x)/C single-atom electrocatalysts suffer from high overpotentials because of their low intrinsic activity and unsatisfactory chemical stability.Herein,through an in-situ polymerization-assisted pyrolysis,the Co as a second metal is introduced into the Mn-N_(x)/C system to construct Co,Mn-N_(x)dual-metallic sites,which atomically disperse in N-doped 1D carbon nanorods,denoted as Co,Mn-N/CNR and hereafter.Using electron microscopy and X-ray absorption spectroscopy(XAS)techniques,we verify the uniform dispersion of CoN4and MnN4atomic sites and confirm the effect of Co doping on the MnN_(4) electronic structure.Density functional theory(DFT)calculations further elucidate that the energy barrier of ratedetermining step(^(*)OH desorption)decreases over the 2 N-bridged MnCoN_(6) moieties related to the pure MnN_(4).This work provides an effective strategy to modulate the local coordination environment and electronic structure of MnN_(4) active sites for improving their ORR activity and stability.

关键词： Dual-atom sites Oxygen reduction reaction M-Nx/C catalysts Coordination environment Electronic structure Synergistic effect

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Bifunctional oxygen electrode cobalt–nickel sulfides catalysts originated from intercalated LDH precursors

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Journal of Energy Chemistry 2022年第11期31卷 376-386,I0010页

作者： Xiaofei Gong Haihong Zhong Luis Alberto Estudillo-Wong Nicolas Alonso-Vante yongjun feng Dianqing Li State Key Laboratory of Chemical Resource Engineering Beijing Engineering Center for Hierarchical CatalystsCollege of ChemistryBeijing University of Chemical TechnologyBeijing 100029China Departamento de Sociedad y Política Ambiental CIIEMADInstituto Politécnico NacionalCalle 30 de junio de 1520Alcaldía GAMC.P.07340 CDMXMexico IC2MP UMR-CNRS 7285University of PoitiersF-86073 Poitiers CedexFrance

Bimetallic cobalt-nickel sulfide nanoparticles anchored on S-,N-codoped holey carbon nanosheets(CoNiS-T@NCFs)with a hydrangea-like morphology,were synthesized via a confinement synthesis route,in which an intercalated LDH precursor was subjected to the interlayer-confined carbonization and host-layer sulfurization.The phase transformation and structure evolution(e.g.,atom site occupancy,crystallite size,and cell volume)of the CoNi-S-T@NCFs electrocatalysts,as a function of sulfurization temperatures,were confirmed by X-ray diffraction and Rietveld analyses.The sulfur vacancies effectively enhance the electrocatalytic activity,while the synergistic effect of(Co,Ni)7 S8 alloy and S,N-codoped carbon matrix facilitates the electron transfer and accelerates reaction kinetics,making CoNi-S-900@NCFs an efficient and stable bifunctional electrocatalyst for oxygen reduction reaction(ORR).The rich highvalence Co(Ⅲ)and Ni(Ⅲ)of CoNi-S-900@NCFs facilitates the in-situ transformation of the metal(oxy)hydroxides intermediates with high catalytic activity for oxygen evolution reaction(OER).Thus,with a bifunctional parameter,ΔE,of 0.75 V(E_(j=10,OER)-E_(1/2,ORR)),this electrocatalyst slightly outperforms the state-of-the-art commercial Pt/C+RuO_(2)/C catalyst(ΔE=0.76 V)in alkaline medium.This work demonstrates the influence that the sulfurization temperature has on the relationship between the structure and electrocatalytic performance of bimetallic sulfides prepared by the synthesis strategy using the intercalated LDH precursor.This strategy can be extended to prepare other chalcogenides with binary or ternary transition metals.

关键词： Bimetallic sulfides Confinement synthesis LDHs ORR OER

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从古典到现代:应用型大学的“创生”逻辑与“类型”超越

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江苏高教 2024年第6期 25-37页

作者：陈明冯用军曲阜师范大学教育学院山东济宁273165 枣庄学院心理与教育科学学院山东枣庄277160 陕西师范大学教育学部西安710062

知识逻辑与地域逻辑是应用型大学“创生”和通过“类型”超越实现高质量发展的核心要义。应用型大学的“创生”得益于现代大学从古典大学转型中迸发出来的勃勃生机,也植根于现代大学蕴含的“新知识”、民族性与民主化的血脉基因中,然而... 详细信息

知识逻辑与地域逻辑是应用型大学“创生”和通过“类型”超越实现高质量发展的核心要义。应用型大学的“创生”得益于现代大学从古典大学转型中迸发出来的勃勃生机,也植根于现代大学蕴含的“新知识”、民族性与民主化的血脉基因中,然而它们又被不同的国情和文化土壤所栽培,形成了不同形态的“应用型”大学。美国式大学的形态是模糊的,但精神却遍布在不同层次不同类型的高校中;德国式大学被推向了独立的“合法”地位;日本式大学本身是“科技发电站”。在高等教育大众化时代,中国创建了不同于传统大学的“新大学”——应用型大学;在高等教育普及化时代,应用型大学“理想化”“同质化”“线性化”的类型症结逐渐凸显。在加快建设教育强国的新时代,中国应用型大学集群必须从高等教育普及化时代的阶段性特征、个体探索的方法、生态环境营造等视界实现“类型”超越和应用型高等教育体系重构,支撑中国式高等教育现代化助力实现中国式现代化。

关键词：应用型大学 “创生”逻辑 “类型”超越大学集群教育强国

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Practicability Evaluation and Improvement of Bloodletting Model Mold in Mongolian Medicine Teaching

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Medicinal Plant 2023年第4期14卷 99-102页

作者： Na ZHU yongjun feng Department of Medicine Xilin Gol Vocational CollegeXilin Hot 026000China

According to the problems such as low level and depth of experimental teaching research of Mongolian medicine in higher vocational colleges, lack of applicable teaching model mold, lack of students practical operation in time, and single teaching, the development direction and ideas of bloodletting model mold in Mongolian medicine in vocational Mongolian medicine teaching were proposed to provide valuable reference for the experimental teaching reform of traditional therapy of Mongolian medicine and the teaching reform and development ideas of Mongolian medicine and other traditional medicine.

关键词： Specialty of Mongolian medicine Higher vocational education Experimental teaching of bloodletting in Mongolian medicine Bloodletting model mold of Mongolian medicine

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GmNMHC5 may promote nodulation via interaction with GmGAI in soybean

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The Crop Journal 2022年第1期10卷 273-279页

作者： Wenting Wang Zhili Wang Wensheng Hou Li Chen Bingjun Jiang Wenya Ma Lijuan Bai Wenwen Song Cailong Xu Tianfu Han yongjun feng Cunxiang Wu School of Life Science Beijing Institute of TechnologyBeijing 100081China MARA Key Laboratory of Soybean Biology(Beijing) Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Soybean(Glycine max[L.]Merr.)is a food and oil crop whose growth and yield are influenced by root and nodule development.In the present study,Gm NMHC5 was found to promote the formation of nodules in overexpressing mutants.In contrast,the number of nodules in Gmnmhc5 edited with CRISPR/Cas9 decreased sharply.In 35 S:Gm NMHC5 mutants,expression levels of genes involved in nodulation were significantly up-regulated.Both in vitro and in vivo biochemical analyses showed that Gm NMHC5 directly interacted with Gm GAI(a DELLA protein),and the content of gibberellin 3(GA_(3))in overexpressing mutants was lower than that in the wild type.These results revealed that Gm NMHC5 participates in the classical GA signaling pathway,and may regulate the content of GA_3 to match the optimal concentration required for nodule formation,thereby promoting nodulation by directly interacting with Gm GAI.A model illustrating the mechanism by which Gm NMHC5 promotes soybean nodulation is presented.

关键词： Glycine max GmNMHC5 GmGAI Nodulation GA pathway

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教育法治视野下行业产教融合共同体:核心要义及其法律规制

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河北师范大学学报（教育科学版） 2024年第2期26卷 93-102页

作者：黄亚宇冯用军陕西师范大学教育学部陕西西安710062 湖南机电职业技术学院现代职业教育发展政策与法律研究中心湖南长沙410151 石河子大学师范学院新疆石河子832003

行业产教融合共同体是一种新型的产学研用一体化组织形式,也是一种同步促进产业发展和提升人才培养质量的新模式。在科学界定行业产教融合共同体的核心要义基础上,系统分析行业产教融合共同体的主体、内容、客体等方面的构成要素,发现... 详细信息

行业产教融合共同体是一种新型的产学研用一体化组织形式,也是一种同步促进产业发展和提升人才培养质量的新模式。在科学界定行业产教融合共同体的核心要义基础上,系统分析行业产教融合共同体的主体、内容、客体等方面的构成要素,发现其本质属性是通过产教融合媒介培养适应产业发展需求的高素质技能人才、提升产业的竞争力和创新能力。行业产教融合共同体在组织形式、法人地位、成员的权利义务、合同关系、知识产权保护等方面存在风险,建议从整体层面维护共同体的公平正义、个体层面保障共同体的个体权利、规则层面健全共同体的法律制度三个维度规范共同体的运作,保障参与各方的合法权益,推动其高质量发展,助力现代职业教育体系建设。

关键词：行业产教融合共同体法人地位法律风险法律规制

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Improving thermal stability and light fastness of Acid Red 114 by incorporating its anions in a ZnAl-layered double hydroxides matrix

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Particuology 2012年第4期10卷 503-508页

作者： Haifeng Zhu Liren Wang Pinggui Tang yongjun feng Dianqing Li State Key Laboratory of Chemical Resource Engineering Belting University of Chemical TechnologyBeijing 100029China

Incorporation of anions of Acid Red 114 dye （1,3-naphthalenedisulfonic acid, 8-[2-[3,3＇-dimethyl-4＇-[2-[4- [l（4-methylphenyl）sulfonyl]oxy] phenyl]diazenyl] [1,1＇-biphenyl]-4-yl]diazenyl]-7-hydroxy-, disodium salt）（denoted as NPDA） into ZnAl-layered double hydroxides （LDHs） has been carried out by an anion- exchange method in an effort to improve their thermal stability and light fastness. After intercalation of NPDA anions, the interlayer distance of the LDHs increases from 0.87 to 2.18 nm, confirming their incorporation into the interlayer galleries of the LDHs host. Infrared spectroscopy and thermogravimetric analysis revealed the presence of host-guest interactions between LDHs layers and NPDA anions. The thermal stability of NPDA and ZnAI-NPDA-LDHs was compared by thermogravimetric-differential ther- mal analysis, UV-visible spectroscopy and infrared spectroscopy. It was found that the thermal stability of NPDA anions was markedly improved by incorporation into the ZnA1-LDHs matrix, while the light fastness was also enhanced.

关键词： Layered double hydroxidesAnion-exchangeIncorporationThermal stabilityLight fastness

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An energy saving and fluorine-free electrorefining process for ultrahigh purity lead refining

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Chinese Journal of Chemical Engineering 2019年第5期27卷 1191-1199页

作者： Xuan Zhang Junqing Pan Yanzhi Sun yongjun feng Huixia Niu State Key Laboratory of Chemical Resource Engineering Beijing Engineering Center for Hierarchical Catalysts Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology

The present paper reports a new fluoride-free and energy-saving lead electrolytic refining process in order to solve the serious problems of the existing Betts lead electrorefining process, such as low production efficiency,high energy consumption and fluorine pollution. In the process, a mixed solution of perchloric acid and lead perchlorate(HClO4-Pb(ClO4)2) with the additives of gelatin and sodium lignin sulfonate is employed as the new electrolyte. The cathodic polarization curves show that HClO4 is very stable, and there is no any reduction reaction of HClO4 during the electrolytic process. The redox reactions of lead ions in HClO4 solution are very reversible with an ultrahigh capacity efficiency, so the HClO4 acts as a stable support electrolyte with higher ionic conductivity than the traditional H2SiF6 electrolyte. The results of the scale-up experiments show that under the optimal conditions of 2.8 mol·L-1 HClO4, 0.4 mol·L-1 Pb(ClO4)2 and electrolysis temperature of 45 ℃, the energy consumption is as low as 24.5 kW·h·(t Pb)-1 , only about 20% of that by Betts method at the same current density of 20 mA·cm-2, and the purity of the refined lead is up to 99.9992%, much higher than that specified by Chinese national standard(99.994%, GB/T 469-2013) and European standard(99.99%, EN 12659–1999).

关键词： Lead refining Perchloric acid Fluoride-free Electrorefining process

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Oxygen vacancies engineering by coordinating oxygen-buffering CeO_(2) with CoO_(x) nanorods as efficient bifunctional oxygen electrode electrocatalyst

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Journal of Energy Chemistry 2021年第8期30卷 615-625,I0013页

作者： Haihong Zhong Luis Alberto Estudillo-Wong Yuan Gao yongjun feng Nicolas Alonso-Vante State Key Laboratory of Chemical Resource Engineering Beijing Engineering Center for Hierarchical CatalystsCollege of ChemistryBeijing University of Chemical TechnologyNo.15 Beisanhuan East Road100029 BeijingChina IC2MP UMR-CNRS 7285University of PoitiersF-86022 Poitiers CedexFrance Departamento de Sociedad y Política Ambiental CIIEMADInstituto Politécnico NacionalCalle 30 de junio de 1520Alcaldía GAMC.P.07340 CDMXMexico Anqing Research Institute Beijing University of Chemical TechnologyNo.8 Huanhu West RoadHigh-Tech DistrictAnqing 24600China

CeO_(2)decorated CoOx rod-like hybrid,supported onto holey reduced graphene(CoOx/CeO_(2)/RGO)composite,was fabricated via a surfactant-assisted route.Its corresponding electrocatalytic performance towards oxygen reduction/evolution reactions(ORR and OER)was systematically investigated in alkaline electrolyte.Structural,morphological and compositional studies revealed changes in electronic and surface properties when CeO_(2)was introduced as an oxygen buffer material.The oxygen vacancies effectively enhanced the electrocatalytic activity,while the synergistic effect of co-catalyst CeO_(2),CoOx activecenters,and defective graphene with many voids facilitate the charge/mass transfer,making CoOx/CeO_(2)/RGO an efficient and stable bifunctional electrocatalyst for OER/ORR with△E=0.76 V(△E=E10mAcm.-2OER-E_(1/2).ORR).This parameter is 70 mV and 270 mV lower than CoOx/RGO and the benchmark Pt/C,respectively.In addition,the OER/ORR bifunctionality of CoOx/CeO_(2)/RGO composite outperforms that of Pt/C catalyst in a H2-O_(2)micro fuel cell platform.

关键词： Co3O4 CeO_(2) Oxygen vacancies ORR OER

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Brood sex ratio in the Yellow-bellied Prinia(Prinia flaviventris)

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Avian Research 2017年第2期8卷 76-82页

作者： Zhifeng Ding Fang Ji Qiuli Huang Longwu Wang Aiwu Jiang Chunlan Zhang yongjun feng Yuan Tian Huijian Hu Wei Liang Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationGuangdong Institute of Applied Biological ResourcesGuangzhou 510260China Ministry of Education Key Laboratory for Tropical Plant and Animal Ecology College of Life SciencesHainan Normal UniversityHaikou 571158China School of Life Sciences Guizhou Normal UniversityGuiyang 550001China College of Forestry Guangxi UniversityNanning 530004China

Background:The adjustment of sex ratios in birds can occur at the egg and nestling stages. Previous studies showed that the sex ratio was affected by environmental factors and parental condition; it may result in seasonal and ecosystem differences.Methods:In this study, the brood sex ratio of the Yellow-bellied Prinia(Prinia flaviventris) in the Nonggang area, Guangxi, southwestern China, was investigated during the breeding season from May to June in 2013 using PCR amplification from whole-genome DNA extracted from blood samples. A total of 31 nests of Yellow-bellied Prinia, including 132 brood fledglings and 31 pairs, were sampled.Results:The results showed that the brood sex ratio of the Yellow-bellied Prinia was 1:1, and sex ratios of different nests were evenly distributed within the study area. No significant relationship was found between parental quality and nest characteristics with the brood sex ratio.Conclusions:The present study indicated that no brood sex ratio bias in the Yellow-bellied Prinia highlighted the complexity of sex ratio adjustment in birds. In spite of our negative results, the lack of an association between brood sex ratio and parental quality and environmental factors in the Yellow-bellied Prinia provides valuable information on the adjustment of sex ratios in birds.

关键词： Brood sex ratio Parental quality Yellow-bellied Prinia Prinia flaviventris Sex ratio adjustment

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