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Frontispiece: Tailoring the Local Environment of Platinum in Single-Atom Pt1/CeO2Catalysts for Robust Low-Temperature CO Oxidation

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Angewandte Chemie International Edition 2021年第50期60卷

作者： Dr. Dong Jiang Dr. Yonggang Yao Tangyuan Li Dr. Gang Wan Dr. Xavier Isidro Pereira-Hernández Dr. Yubing Lu Dr. Jinshu Tian Dr. Konstantin Khivantsev Dr. Mark H. Engelhard Dr. Chengjun Sun Carlos E. García-Vargas Dr. Adam S. Hoffman Dr. Simon R. Bare Prof. Abhaya K. Datye Prof. Liangbing Hu Prof. Yong Wang The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99164 USA Department of Materials Science and Engineering University of Maryland College Park MD 20742 USA Current address: State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Stanford Synchrotron Radiation Lightsource SLAC National Accelerator Laboratory Menlo Park CA 94025 USA Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99354 USA X-ray Science Division Advanced Photon Source Argonne National Laboratory Lemont IL 60439 USA Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials University of New Mexico Albuquerque NM 87131 USA

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Frontispiz: Tailoring the Local Environment of Platinum in Single-Atom Pt1/CeO2Catalysts for Robust Low-Temperature CO Oxidation

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Angewandte Chemie 2021年第50期133卷

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Tailoring the Local Environment of Platinum in Single-Atom Pt1/CeO2Catalysts for Robust Low-Temperature CO Oxidation

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Angewandte Chemie 2021年第50期133卷

A single-atom Pt 1 /CeO 2 catalyst formed by atom trapping (AT, 800 °C in air) shows excellent thermal stability but is inactive for CO oxidation at low temperatures owing to over-stabilization of Pt 2+ in a highly symmetric square-planar Pt 1 O 4 coordination environment. Reductive activation to form Pt nanoparticles (NPs) results in enhanced activity; however, the NPs are easily oxidized, leading to drastic activity loss. Herein we show that tailoring the local environment of isolated Pt 2+ by thermal-shock (TS) synthesis leads to a highly active and thermally stable Pt 1 /CeO 2 catalyst. Ultrafast shockwaves (>1200 °C) in an inert atmosphere induced surface reconstruction of CeO 2 to generate Pt single atoms in an asymmetric Pt 1 O 4 configuration. Owing to this unique coordination, Pt 1 δ+ in a partially reduced state dynamically evolves during CO oxidation, resulting in exceptional low-temperature performance. CO oxidation reactivity on the Pt 1 /CeO 2 _TS catalyst was retained under oxidizing conditions.

关键词： CO oxidation metal–support interactions platinum single-atom catalysis thermal-shock synthesis

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Shape Stability of Polyethylene Glycol/Acetylene Black Phase Change Composites for Latent Heat Storage

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Advances in materials Science and Engineering 2018年第1期2018卷 1-9页

作者： Zhang, Jingjing Li, Hairong Tu, Junyang Shi, Ruonan Luo, Zhiping Xiong, Chuanxi Jiang, Ming School of Materials Science and Engineering State Key Lab for New Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan430200 China Mechanical Metrology Division Hubei Institute of Measurement and Testing Technology Wuhan430223 China Department of Chemistry and Physics Fayetteville State University FayettevilleNC28301 United States

Sufficient shape stability is essential for a high-performance phase change material (PCM). Although significant advances have been made to develop form-stable composites, technical development in the field of polymer-based PCMs is currently limited by an incomplete understanding of the shape stability. Form-stable polyethylene glycol/acetylene black (PEG/AB) PCMs containing PEGs with different average molecular weights have been obtained by melt mixing to investigate the shape stability of the PEG/AB composites. It was found that the phase change behaviors of the PEG/AB composites were not only attributed to the interactions between the AB and PEG, but also to the intermolecular interactions of the PEG chains, depending on the varying molecular weights of the PEGs. Physically crosslinked structure with temporary junctions was formed through hydrogen bonding, capillary, surface tension forces, intermolecular friction, and macromolecular entanglement, which contributed to the constrained chain motion and thus the solid-solid phase change behavior of the PEG/AB composites. The physically crosslinked structure was more stable with longer length of the PEG molecular chains, resulting in higher critical impregnated contents of the PEG into the AB and thus improved latent heat. © 2018 Jingjing Zhang et al.

关键词： Polyethylene glycols

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Correction: Ensemble-machine-learning-based correlation analysis of internal and band characteristics of thermoelectric materials

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Journal of materials Chemistry C 2020年第37期8卷 13091-13091页

作者： Lihao Chen Ben Xu Jia Chen Ke Bi Changjiao Li Shengyu Lu Guosheng Hu Yuanhua Lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 P. R. China School of Science Beijing University of Posts and Telecommunications P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Smart Materials and Device Integration International School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 P. R. China Software School Xiamen University Xiamen 361005 P. R. China

Correction for ‘Ensemble-machine-learning-based correlation analysis of internal and band characteristics of thermoelectric materials’ by Lihao Chen et al., J. Mater. Chem. C, 2020, DOI: 10.1039/d0tc02855j.

Correction for ‘Ensemble-machine-learning-based correlation analysis of internal and band characteristics of thermoelectric materials’ by Lihao Chen et al., J. Mater. Chem. C, 2020, DOI: 10.1039/d0tc02855j.

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Preparation of Antheraea Pernyi Silk Fibroin Microspheres by a Facile Electrostatic Differentiation Method

Preparation of Antheraea Pernyi Silk Fibroin Microspheres by...

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textile Bioengineering and Informatics Symposium Proceedings

作者： Xiu-Fang Li Shu-Qin Yan Guang-Ming Cai An-Chang Xu Ren-Chuan You State Key Laboratory of New Textile Materials and Advanced Processing Technology School of Textile Science and Engineering Wuhan Textile University

Microsphere carriers have considerable potential as a platform for the delivery of therapeutic *** pernyi silk fibroin(ASF) is a promising biomaterial due to excellent biocompatibility, tailorable degradability, and the presence of intrinsic RGD tripeptide sequence. In this study, ASF microspheres with controllable size were fabricated by high-voltage electrostatic differentiation and freeze-drying. ASF microspheres are spherical in shape as determined by SEM with diameters in the range of 100～600 μm. The effects of solution concentration and voltage on the size and morphology were investigated. The results showed that the microsphere size increased with the increasing concentration, while decreased when voltage is ***-insolubility of ASF microspheres was achieved by inducing structural transition from random/α-helix to β-sheet. Because of mild preparation conditions, the ASF microspheres are a promising drug carrier in biomedical field.

关键词： Silk Protein Wild Silk Fibroin Microspheres Drug Carrier

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Energy Absorption and Deformation Mechanism of Lotus-type Porous Coppers in Perpendicular Direction

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Journal of materials Science & technology 2017年第11期33卷 1353-1361页

作者： Weidong Li Kai Xu Honghao Li Haoling Jia Xinhua Liu Jianxin xie Key Laboratory of Advanced Materials Processing University of Science and Technology Beijing Beijing 100083 China Department of Materials Science and Engineering University of Tennessee Knoxville TN 37996 United States State Key Laboratory of Silicate MaterialsforArchitectures Wuhan University of Technology Wuhan 430070 China Department of Environmental Technology and Sustainability New York Institute of Technology Old Westbury NY 11568 United States

As metallic foams used for energy absorption in the automotive and aerospace industries, recently invented lotus-type porous metals are viewed as potential energy absorbers. Yet, solid conclusion on their eligibility as energy absorbers is still in question, particularly when compression is in the direction perpendicular to the axial orientation of cylindrical pores. In this work, the energy absorption of lotus-type porous coppers in the perpendicular direction is investigated at strain rates from 0.001 s^（-1） to^2400 s^（-1）. The energy absorption capacity and the energy absorption efficiency are calculated to be4–16 k J/kg and 0.32–0.7, respectively, slightly inferior to metal foams and the same porous solid compressed in the parallel direction due to the shortened extent of the plateau stress region. The deformation mechanism is examined experimentally in conjunction with finite element modeling. Both suggest that gradual squeeze and collapse of pores are the mechanisms accommodating the energy absorption. The deformation is generally evenly distributed over pore ligaments and independent of strain rate.

关键词： Lotus-type porous structure Energy absorption Plateau stress region Plastic collapse Strain rate effect

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Regulating the Mechanical and Optical Properties of Polymer-based Nanocomposites by Sub-Nanowires

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Angewandte Chemie 2022年第5期135卷

作者： Feng Yuan Dr. Chen Ouyang Minzheng Yang Prof. Wenxiong Shi Dr. Weibin Ren Prof. Yang Shen Prof. Yan Wei Prof. Xuliang Deng Prof. Xun Wang Institute of Medical Technology Peking University Health Science Center Beijing 100191 China Beijing Laboratory of Biomedical Materials Department of Geriatric Dentistry Peking University School and Hospital of Stomatology Beijing 100081 China Engineering Research Center of Advanced Rare Earth Materials Department of Chemistry Tsinghua University Beijing 100084 China Contribution: Data curation (lead) Formal analysis (lead) Investigation (lead) Writing - original draft (lead) Contribution: Data curation (supporting) Formal analysis (supporting) State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384 China Contribution: Software (supporting) Contribution: Formal analysis (supporting) Contribution: Formal analysis (supporting) Supervision (supporting) Contribution: Conceptualization (equal) Formal analysis (lead) Supervision (lead) Contribution: Conceptualization (lead) Supervision (lead) Contribution: Conceptualization (lead) Data curation (lead) Investigation (lead) Methodology (lead) Project administration (lead) Supervision (lead) Validation (lead) Writing - review & editing (lead)

Sub-nanowires (SNWs) exhibit great potential applications in nanocomposites owing to their high specific surface area, high flexibility, and similarity to polymer chains in dimension, which are a good entry point to bridge inorganic materials and polymer materials. Herein, we synthesized hydroxyapatite sub-nanowires (HAP SNWs) and engineered hydroxyapatite sub-nanowires/polyimide (HSP) gels and films by simple mixing of HAP SNWs and polyimide (PI). Benefiting from the interactions between HAP SNWs and PI, these nanocomposites were a continuous hybrid network. As the increase of HAP SNWs contents, the viscosity and modulus of HSP gels were greatly improved by one or two orders of magnitude compared with PI gel. HSP films not only maintained high transparency but also gained high haze, as well as exhibited enhanced Young's modulus. Thus, both HSP gels and films developed in this work are promising for various applications in coatings and high-performance films.

关键词： Gels Nanocomposites Nanowires Thin Films

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The Development and Performance of Knitted Fabrics with Simplified Embeddable and Locatable Spun Yarns

The Development and Performance of Knitted Fabrics with Simp...

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textile Bioengineering and Informatics Symposium Proceedings

作者： Chi-Yu Fu Can-Can Wang Shun-Lin Fu Xin Liu Guang-Ming Cai Zhi-Gang Xia College of Textile Science and Engineering Wuhan Textile University State Key Laboratory Base of New Materials and Advanced Processing Technology Wuhan Textile University

In this study, to solve technical problems such as bad wear abilities of hairy ramie spun yarn fabrics and the inconvenience of four-components' embeddable and locatable spinning system(denoted as ELS), this paper introduces a simplified embeddable and locatable spinning system(denoted as S-ELS) to produce smooth yarns of ramie fibers;then the smooth ramie yarns were knitted to obtain smooth fabrics. For a comparative study,three different ramie yarns were prepared by S-ELS, dry contact spinning of S-ELS and wet contact spinning of S-ELS;all the three type of yarns were knitted into fabrics respectively for the comparison of wearing performance. Results show that the wet contact spun S-ELS yarns had the least hairiness;knitted fabrics of wet contact spun S-ELS yarns had smoother surface, better permeability and higher mechanical properties than ELS as well as dry contact spun S-ELS yarns.

关键词： Embeddable and Locatable Spinning Fabric Properties Wet Spinning Fabric Development

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Bifunctional Electrocatalysts: Cobalt−Iron Oxide Nanosheets for High‐Efficiency Solar‐Driven CO2−H2O Coupling Electrocatalytic Reactions (Adv. Funct. Mater. 31/2020)

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advanced Functional materials 2020年第31期30卷

作者： Yuying Mi Yuan Qiu Yifan Liu Xianyin Peng Min Hu Shunzheng Zhao Huanqi Cao Longchao Zhuo Hongyi Li Junqiang Ren Xijun Liu Jun Luo Center for Electron Microscopy Tianjin Key Lab of Advanced Functional Porous Materials Institute for New Energy Materials and Low‐Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384 China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen University Shenzhen 518060 China Department of Environmental Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Display Materials and Photoelectric Devices (Ministry of Education) School of Materials Science and Engineering Tianjin University of Technology Tianjin 300384 China School of Materials Science and Engineering Xi'an University of Technology Xi'an 710048 China Qualification of Products Supervision & Inspection Institute of Technology Xinjiang Uygurs Autonomous Region Urumqi 830011 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou 730050 China

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