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A non-precious metal catalyst for oxygen reduction prepared by heat-treating a mechanical mixture of carbon black,melamine and cobalt chloride

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Chinese Chemical Letters 2013年第12期24卷 1109-1111页

作者： yu-jun si Zhong-Ping Xiong Chang-Guo Chen Ping Liu Hui-Juan Wu College of Chemistry and Pharmaceutical Engineering Sichuan University of Science and Engineering College of Chemistry and Chemical Engineering Chongqing University

A non-precious metal catalyst CoMe]C for the oxygen reduction reaction is prepared by heat-treating a mechanical mixture of carbon black, melamine and cobalt chloride at 600 under nitrogen atmosphere for 2 h. The catalytic activity of CoMe/C is characterized by the electrochemical linear sweep voltammetry technique. The onset reduction potential of the catalyst is 0.55 V （vs. SCE） at a scanning rate of 5 mV/s in 0.5 mol/L H2SO4 solution. The formation of the ORR activity sites of CoMe/C is facilitated by metallic β- cobalt.

关键词： Oxygen reduction Non-precious metal catalyst Preparation Mechanical method

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一个分段Sprott系统及其混沌机理分析

物理学报 2009年第11期58卷 7525-7531页

作者：陈建军禹思敏广东工业大学自动化学院广州510006

提出了一个分段Sprott系统,对其混沌机理进行了分析.根据Shilnikov定理,在满足异宿轨道基本特性、Shilnikov不等式和特征方程条件下,通过寻找该系统中由不稳定流形、异宿点和稳定流形三个几何不变集上所形成的一条异宿轨道,在分段Sprot... 详细信息

提出了一个分段Sprott系统,对其混沌机理进行了分析.根据Shilnikov定理,在满足异宿轨道基本特性、Shilnikov不等式和特征方程条件下,通过寻找该系统中由不稳定流形、异宿点和稳定流形三个几何不变集上所形成的一条异宿轨道,在分段Sprott系统中导出了存在异宿轨道时该系统中各个参数应符合的条件,并找到了一组对应的实参数,由此证明了异宿轨道的存在性.最后,根据这组对应的实参数,进行了电路设计与实验验证.

关键词：分段Sprott系统 Shilnikov定理异宿轨道电路实验

Telomere-to-telomere genome assemblies of cultivated and wild soybean provide insights into evolution and domestication under structural variation

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Plant Communications 2024年第8期5卷 92-95页

作者： Kai-Hua Jia Xiaoyan Zhang Lei-Lei Li Tian-Le Shi Dan Liu Yongyi Yang yunzhe Cong Runfang Li Yanyan Pu Yongchao Gong Xue Chen yu-jun si Rumei Tian Zhenya Qian Hanfeng Ding Nana Li National Saline-Alkali Tolerant Crop Germplasm Resources Nursery(Dongying) Shandong International Joint Laboratory of Agricultural Germplasm Resources InnovationInstitute of Crop Germplasm ResourcesShandong Academy of Agricultural SciencesJinan 250100China College of Biological Sciences and Technology Beijing Forestry UniversityBeijing 100083China Shandong Provincial Center of Forest and Grass Germplasm Resources Jinan 250102China Weifang Academy of Agricultural Sciences Weifang 261017China Shandong Huaya Agricultural Technology Co. Ltd.Jining 272400China

Dear Editor,Soybean(Glycine max)is a critical crop worldwide,renowned as a major source of edible oil and *** was domesticated approximately 5000-9000 years ago in China,between latitudes 32°N and 40°N,from its wild progenitor,Glycine *** recent years,numerous genome assemblies for both cultivated and wild soybeans have been published,with cultivated soybean genomes even achieving telomere-to-telomere(T2T)completeness(Zhang et al.,2023a,2023b;Wang et al.,2023;Huang et al.,2024).

关键词： soybean insight evolution

Structural engineering of high-entropy alloys for advanced electrocatalytic reactions

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Tungsten 2025年第1期7卷 1-31页

作者： Qiao Xie Ying-Jie yu Hai-jun Zhang Ya-Ping Deng Wen Lei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Department of Chemical Engineering Waterloo Institute for Sustainable Energy Waterloo Institute for Nanotechnology University of Waterloo

High-entropy alloys(HEAs) have emerged as promising candidates to replace traditional precious metal catalysts,owing to their unique chemical and physical *** review commences by revisiting the fundamental concepts of HEAs,including their synthesis methods and structural control strategies in *** underscores the critical role of meticulously manipulating both macroscopic and microscopic structures of the HEAs to optimize their catalytic performance.A deep understanding of the structure-activity relationship in HEAs across various configurations is pivotal in developing more effective *** review methodically encapsulates the research progress of structural control strategies for HEAs in achieving efficient energy conversion,with the aim of gaining a better understanding of the relationship between structure and *** review concludes by summarizing the current achievements and challenges,and suggestions for potential future directions of HEAs in the fields of energy conversion and environmental purification.

关键词： Electrocatalytic Energy conversion High-entropy alloys Structural modulation

Personalized federated few-shot node classification

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Science China(Information Sciences) 2025年第1期68卷 204-218页

作者： yunfeng ZHAO Xintong HE Guoxian yu jun WANG Yongqing ZHENG Carlotta DOMENICONI School of Software Shandong University Joint SDU-NTU Centre for Artificial Intelligence Research Shandong University Department of Mathematics National University of Singapore Department of Computer Science George Mason University

Personalized federated learning(PFL) aims to train customized models for individual clients in a decentralized setting, with the account of non-independent and identically distributed data across clients. However, most PFL methods adopt uniform classification layers for diverse clients and give rise to error-prone predictions, due to the task heterogeneity notably prominent in decentralized graph data scenarios. Although some PFL solutions setup client-specific classification layers for each client and optimize them only locally, they are corrupted with limited local training data. We propose an innovative solution called federated parameter decoupling and node augmentation(Fed PANo) to address these problems and to achieve personalized federated few-shot node classification, which is a prevalent and challenging but unexplored topic. Specifically, Fed PANo first separates the local model into the GNN and classifier to handle unique client-specific task variations. The GNN is trained through federated learning to capture shared knowledge of graph nodes across clients, while the classifier is custom-designed and trained individually for each client. Additionally, a generic classifier shared among clients is adopted to encourage the GNN's grasp of shared information. Then Fed PANo further proposes the node generator along with its local and collaborative training strategies to deal with the node scarcity of clients. Extensive experimental results on benchmark datasets confirm that Fed PANo outperforms eight competitive baselines across different settings.

关键词： personalized federated learning few-shot learning node classification task heterogeneity parameter decoupling node augmentation

Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

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Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong Sun Wenwen Guan Cailing Chen Chao Wu Xiaoling Liu Biao Meng Tao Chen yu Han jun Wang Shibo Xi yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Activation energy

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利用光合菌发酵对玉米秸杆进行转化的研究

微生物学通报 2001年第6期28卷 5-9页

作者：曾宇谭四军四川大学生命科学学院成都610064

系统研究了光合菌在氨法处理和非氨处理两种环境下 ,在厌氧、好氧、以及自然条件下对玉米秸秆的转化。通过发酵液中还原糖与蛋白质浓度的测定结果的比较、判断、优选出一种最适合条件下光合菌对玉米转化的途径。研究表明 ,在以氨化法处... 详细信息

系统研究了光合菌在氨法处理和非氨处理两种环境下 ,在厌氧、好氧、以及自然条件下对玉米秸秆的转化。通过发酵液中还原糖与蛋白质浓度的测定结果的比较、判断、优选出一种最适合条件下光合菌对玉米转化的途径。研究表明 ,在以氨化法处理的玉米秸秆为底物与光合菌的发酵实验中 ,发酵液中的还原糖和蛋白质的尝试都要比非氨法条件下玉米秸秆为底物与光合菌发酵实验中的发酵液中的不原糖和蛋白质的浓度高。实验结果证明了转化产生的还原糖、蛋白质都是光合菌能利用的营养成分 ,由此达到利用光合菌转化玉米秸秆的研究目的。

关键词：光合菌玉米秸秆还原糖蛋白质发酵转化

国产智能全馏程在线分析仪应用及常见故障处理

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企业技术开发 2018年第5期37卷 57-59,78页

作者：余四军中国石化股份有限公司长岭分公司信息中心湖南岳阳414012

文章介绍了国产智能全馏程分析仪的主要特点、技术参数及工作原理,对其在长岭炼化1#催化、焦化等装置应用以来出现的故障进行了分析说明,并提出了具体的改进建议。

关键词：全馏程在线分析仪闭环控制应用评价

De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第1期68卷 174-180页

作者： Fan-Xiao Meng Xing-yu Wang Ka Lu Ju-Song Yang Fu-Min Zhang Ai-jun Ma Bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

关键词： benzofuran atropisomers novel de novo synthetic strategy asymmetric formal [3 + 2] cycladdition Cu/SPDO complex DFT calculations