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Antipoisoning catalysts for the selective oxygen reduction reaction at the interface between metal nanoparticles and the electrolyte

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Carbon Energy 2023年第7期5卷 57-69页

作者： Sourabh S.Chougule A.Anto Jeffery Sreya Roy Chowdhury jiho min Yunjin Kim Keonwoo Ko Bathinapatla Sravani Namgee Jung Graduate School of Energy Science and Technology(GEST) Chungnam National UniversityYuseong-guDaejeonRepublic of Korea

One of the primary challenges in relation to phosphoric acid fuel cells is catalyst poisoning by phosphate anions that occurs at the interface between metal nanoparticles and the *** strong adsorption of phosphate anions on the catalyst surface limits the active sites for the oxygen reduction reaction(ORR),significantly deteriorating fuel cell ***,antipoisoning catalysts consisting of Pt-based nanoparticles encapsulated in an ultrathin carbon shell that can be used as a molecular sieve layer are rationally *** pore structure of the carbon shells is systematically regulated at the atomic level by high-temperature gas treatment,allowing O_(2) molecules to selectively react on the active sites of the metal nanoparticles through the molecular ***,the carbon shell,as a protective layer,effectively prevents metal dissolution from the catalyst during a long-term ***,the defect-controlled carbon shell leads to outstanding ORR activity and durability of the hybrid catalyst even in phosphoric acid electrolytes.

关键词： carbon shell catalyst poisoning effect molecular sieve effect oxygen reduction reaction phosphate anions phosphoric acid fuel cells

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Plant-based,adjuvant-free,potent multivalent vaccines for avian influenza virus via Lactococcus surface display

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Journal of Integrative Plant Biology 2021年第8期63卷 1505-1520页

作者： Shi-Jian Song Gyeong-Im Shin Jinyong Noh jiho Lee Deok-Hwan Kim Gyeongryul Ryu Gyeongik Ahn Hyungmin Jeon Hai-Ping Diao Youngmin Park min Gab Kim Woe-Yeon Kim Young-Jin Kim Eun-Ju Sohn Chang Seon Song Inhwan Hwang Department of Life Science Pohang University of Science and TechnologyPohang37673 Korea College of Pharmacy and Research Institute of Pharmaceutical Science Gyeongsang National UniversityJinju660-701 Korea KCAV Inc. Gwangjin-gu05029 Korea Avian Disease Laboratory College of Veterinary MedicineKonkuk UniversitySeoul05029 Korea Division of Applied Life Science(BK21 PLUS) Institute of Agriculture&Life SciencesGyeongsang National UniversityJinju52828 Korea Bioapp Inc.Pohang Technopark ComplexPohang37668 Korea

Influenza epidemics frequently and unpredictably break out all over the world,and seriously affect the breeding industry and human *** and live attenuated viruses have been used as protective vaccines but exhibit high risks for *** vaccines enjoy high biosafety and specificity but have a few weak points compared to inactivated virus or live attenuated virus vaccines,especially in low *** this study,we developed a new subunit vaccine platform for a potent,adjuvant-free,and multivalent *** ectodomains of hemagglutinins(HAs)of influenza viruses were expressed in plants as trimers(tHAs)to mimic their native *** in plant extracts were directly used without purification for binding to inactivated Lactococcus(iLact)to produce iLact-tHAs,an antigen-carrying bacteria-like particle(BLP).tHAs BLP showed strong immune responses in mice and chickens without ***,simultaneous injection of two different antigens by two different formulas,t^(HAH5N6+H9N2) BLP or a combination of t^(HAH5N6) BLP and t^(HAH9N2) BLP,led to strong immune responses to both *** on these results,we propose combinations of plant-based antigen production and BLP-based delivery as a highly potent and cost-effective platform for multivalent vaccination for subunit vaccines.

关键词： bacteria-like particle(BLP) H5N6 H9N2 Lactococcus lactis multi-valent vaccine plant-based vaccine trimeric HA

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一种解析和预测分子筛结构的新颖方法

一种解析和预测分子筛结构的新颖方法

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第18届全国分子筛学术大会

作者：郭鹏苏婕刘磊峰 jiho Shin Jung Gi min Hyun June Choi Suk Bong Hong Alex G.Greenaway Paul A.Wright Paul A.Cox Zou Xiaodong 斯德哥尔摩大学 Centre for Ordered Nanoporous Materials Synthesis School of Environmental Science and EngineeringPOSTECH School of Pharmacy and Biomedical Sciences University of Portsmouth

我们报道了一种结合了结构解析和结构预测分子筛的新方法,并且成功合成出预测的分子筛结构。通过旋转电子衍射(Rotation Electron Diffraction,RED),我们发现未知分子筛ZSM-25和己知分子筛PAU(属于立方晶系,a=34.34 A)结构的强衍射点分... 详细信息

我们报道了一种结合了结构解析和结构预测分子筛的新方法,并且成功合成出预测的分子筛结构。通过旋转电子衍射(Rotation Electron Diffraction,RED),我们发现未知分子筛ZSM-25和己知分子筛PAU(属于立方晶系,a=34.34 A)结构的强衍射点分布相同(见图1a-d)。利用ZSM-25实验结构因子的振幅和PAU结构因子的相角成功解析出ZSM-25的结构(见图1e,f)。我们称这种方法为强点衍射法(Strong Reflection Approach)。ZSM-25属于立方晶系(a=44.22A),一个晶胞含有1440个四面体原子和2880个氧原子。通过对比PAU和ZSM-25的结构(见图1g,h),我们发现利用强点衍射法可以建立更加复杂的,具有相同结构单元的立方结构(a值分别为54.07A和63.87A)。最后,我们成功合成出这两个更加复杂的结构,分别命名为PST-20和PST-25(见图1i,j)。这份工作己经被国际知名期刊《自然》接收。

关键词：旋转电子衍射结构解析结构预测强点衍射法分子筛

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