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| 1 | Effect of Mn content on the microstructure and mechanical properties of Mg–6Li–4Zn-xMn alloys显示文摘The as-cast Mg–6Li–4Zn-x Mn alloys were prepared and extruded at 280℃with an extrusion ratio of 25:1.The effects of Mn content on the microstructure and mechanical properties of Mg–6Li–4Zn-x Mn alloys were investigated in this study.The XRD results show that Mg–6Li–4Zn–x Mn alloys consisted ofα-Mg(hcp)+β-Li(bcc)duplex structured matrix,Mg Li_(2)Zn and Mn phases.The grains of the extruded Mg–6Li–4Zn–x Mn alloys were refined by dynamic recrystallization during the extrusion process.The EBSD results show that the extruded alloys had basal textures.The grain size of the extruded alloys decreased while the basal texture was strengthened with the increasing Mn addition.The TEM results show that a large amount of nanoscale Mn precipitates existed in the extruded Mg–6Li–4Zn–1.2 Mn alloy,which can effectively inhibit the dynamic recrystallized(DRXed)grains growth during the hot extrusion and is beneficial to the improvement of mechanical properties.Mg–6Li–4Zn–1.2 Mn alloy in this research possesses the best mechanical properties with the ultimate tensile strength and yield strength of 321 MPa,250 MPa,respectively. | Hongju Deng Yan Yang Minmin Li Xiaoming Xiong Guobing Wei Weidong Xie Bin Jiang Xiaodong Peng Fusheng Pan | 2021 | Progress in Natural Science:Materials International2021，31，4： | 3 |
| 2 | Research progress of precise structural regulation of single atom catalyst for accelerating electrocatalytic oxygen reduction reaction显示文摘The development and utilization of renewable clean energy can effectively solve the two major problems of energy and environment. As an efficient power generation device that converts hydrogen energy into electric energy, fuel cell has attracted more and more attention. For fuel cells, the oxygen reduction reaction(ORR) at the cathode is the core reaction, and the design and development of high-performance ORR catalysts remain quite challenging. Since the microenvironment of the active center of single atom catalysts(SACs) has an important influence on its catalytic performance, it has been a research focus to improve the ORR activity and stability of electrocatalysts by adjusting the structure of the active center through reasonable structural regulation methods. In this review, we reviewed the preparation and structure–activity relationship of SACs for ORR. Then, the structural precision regulation methods for improving the activity and stability of ORR electrocatalysts are discussed. And the advanced in-situ characterization techniques for revealing the changes of active sites in the electrocatalytic ORR process are summarized. Finally, the challenges and future design directions of SACs for ORR are discussed. This work will provide important reference value for the design and synthesis of SACs with high activity and stability for ORR. | Minmin Wang Hui Zhang Yunqi Liu Yuan Pan | 2022 | Journal of Energy Chemistry2022，31，9： | 1 |
| 3 | Microstructure and Corrosion Properties of Duplex-Structured Extruded Mg-6Li-4Zn-xMn Alloys显示文摘The extruded Mg-6 Li-4 Zn-xMn(x=0,0.4,0.8,1.2 wt%)alloys were prepared,and the microstructure of the test alloys was investigated by optical microscopy,scanning electron microscopy and transmission electron microscopy.The corrosion properties were determined by electrochemical measurements and immersion measurements in 3.5%NaCl solution.The results indicate that the extruded Mg-6 Li-4 Zn-xMn alloys are mainly composed ofα-Mg phase,β-Li phase,Mn precipitates and some intermetallic compounds(MgLi_(2)Zn).With the addition of Mn,stable corrosion products were formed on the surface of the test alloy,which can effectively inhibit further corrosion progress and improve the corrosion resistance.Mg-6 Li-4 Zn-1.2 Mn alloy exhibits the best corrosion resistance,attributed to grain refinement,the improvement of the stability of corrosion product film and uniform distribution of fine second phases. | Minmin Li Zhe Qin Yan Yang Xiaoming Xiong Gang Zhou Xiaofei Cui Bin Jiang Xiaodong Peng Fusheng Pan | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，5： | 1 |
| 4 | Rheological properties, morphology and thermal performance of EMA-GMA/PC blend 显示文摘 | Pan Minmin Bo Yin Wei Yang | 2007 | Journal of Macromolecular Science:Part B2007，46，6： | 1 |
| 5 | Morphology and thermal properties of a PC/PE blend with reactive compatibilization显示文摘 | Yin Bo Zhao Yin Pan Minmin | 2007 | Polymers for Advanced Technologies2007，18，6： | 1 |
| 6 | NO hydrogenation to NH3 over FeCu/TiO_(2) catalyst with improved activity显示文摘Ammonia is crucial in industry and agriculture, but its production is hindered by environmental concerns and energy-intensive processes. Hence, developing an efficient and environmentally friendly catalyst is imperative. In this study, we employed a straightforward and efficient impregnation technique to create various Cu-doped catalysts. Notably, the optimized 10Fe-8Cu/TiO_(2) catalyst exhibited exceptional catalytic performance in converting NO to NH3, achieving an NO conversion rate exceeding 80% and an NH3 selectivity exceeding 98% at atmospheric pressure and 350 °C. We employed in situ diffuse reflectance Fourier transform infrared spectroscopy and conducted density functional theory calculations to investigate the intermediates and subsequent adsorption. Our findings unequivocally demonstrate that Cu doping enhances the rate-limiting hydrogenation step and lowers the energy barrier for NH3 desorption, thereby resulting in improved NO conversion and enhanced selectivity toward ammonia. This study presents a pioneering approach toward energy-efficient ammonia synthesis and recycling of nitrogen sources. | Dan Cui Yanqin Li Keke Pan Jinbao Liu Qiang Wang Minmin Liu Peng Cao Jianming Dan Bin Dai Feng Yu | 2023 | Frontiers of Chemical Science and Engineering2023，17，12： | 1 |
| 7 | Structural regulation of single-atomic site catalysts for enhanced electrocatalytic CO_(2)reduction显示文摘Electrocatalytic CO_(2)reduction reaction(CO_(2)RR)is considered an efficient way to convert CO_(2)into high-value-added chemicals,and thus is of significant social and economic value.Metal single-atomic site catalysts(SASCs)generally have excellent selectivity because of their 100%atomic utilization and uniform structure of active sites,and thus promise a broad range of applications.However,SASCs still face challenges such as low intrinsic activity and low density of active sites.Precise regulation of the microstructures of SASCs is an effective method to improve their CO_(2)RR performance and to obtain deep reduction products.In this article,we systematically summarize the current research status of SASCs developed for highly efficient catalysis of CO_(2)RR,discuss the various structural regulation methods for enhanced activity and selectivity of SASCs for CO_(2)RR,and review the application of in-situ characterization technologies in the SASC-catalyzed CO_(2)RR.We then discuss the problems yet to be solved in this area,and propose the future directions of the research on the design and application of SASCs for CO_(2)RR. | Minmin Wang Min Li Yunqi Liu Chao Zhang Yuan Pan | 2022 | Nano Research2022，15，6： | 1 |
| 8 | In-situ construction of N-doped carbon nanosnakes encapsulated FeCoSe nanoparticles as efficient bifunctional electrocatalyst for overall water splitting显示文摘The development of bifunctional electrocatalysts with high activity and stability for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)is crucial for efficient overall water splitting but still challenging.Herein,we propose a facile and effective polymerization–pyrolysis–selenization(PPS)strategy for in-situ synthesis of N-doped carbon nanosnakes(NCNSs)encapsulated Fe-doped CoSe nanoparticles(NPs)derived from predesigned trimetallic Zn/Fe/Co polyphthalocyanine conjugated polymer networks.Benefiting from the synergistic effect between the regulation of Fe atoms and CoSe NPs as well as the confinement effect of in situ formed porous conductive carbon nanosnakes,the FeCoSe@NCNSs catalyst exhibited the excellent electrocatalytic activity for HER with small overpotentials(142 and 99 mV in 0.5 M H_(2)SO_(4) and 1 M KOH)and OER(320 mV in 1 M KOH)at the current density of 10 mA cm^(-2).Particularly,it also can be used as an efficient bifunctional electrocatalyst with a cell voltage of 1.66 V to achieve a current density of 10 mA cm^(-2) and superior stability for overall water splitting.Density functional theory study reveals that the doping of Fe atoms on Co Se enhanced the splitting and delocalization of metal-d orbitals close Fermi level,and modifies the distribution of Se-p orbitals close Fermi level,which improved the flexibility of electron donor-acceptor system and the hydrogen adsorption free energy change on metal-metal bridge sites in FeCoSe@NCNSs.Additionally,beneficial from the accepting of Fe-Se bridge site,the overpotential of OER which following intramolecular oxygen coupling mechanism is also decreased,thus accelerating the electrocatalytic performance.This work presents a novel strategy to regulate the activity and stability of transition metal selenides and facilitating the rational design of bifunctional electrocatalysts for overall water splitting applications. | Yuan Pan Minmin Wang Min Li Guangxun Sun Yinjuan Chen Yunqi Liu Wei Zhu Bin Wang | 2022 | Journal of Energy Chemistry2022，31，5： | 0 |
| 9 | Single-atomic Mn sites coupled with Fe_(3)C nanoparticles encapsulated in carbon matrixes derived from bimetallic Mn/Fe polyphthalocyanine conjugated polymer networks for accelerating electrocatalytic oxygen reduction显示文摘The construction of robust coupling catalysts for accelerating electrocatalytic oxygen reduction reaction(ORR)through the modulation of the electronic structure and local atomic configuration is critical but remains challenging.Herein,we report a facile and effective isolation-polymerization-pyrolysis(IPP)strategy for high-precision synthesis of single-atomic Mn sites coupled with Fe_(3)C nanoparticles encapsulated in N-doped porous carbon matrixes(Mn SAs/Fe_(3)C NPs@NPC)catalyst derived from predesigned bimetallic Fe/Mn polyphthalocyanine(FeMn-BPPc)conjugated polymer networks by solid-phase reaction approach.Benefiting from the synergistic effects between the single-atomic Mn-N_(4)sites and Fe_(3)C NPs as well as the confinement effect of NPC,the Mn SAs/Fe_(3)C NPs@NPC catalyst exhibited excellent electrocatalytic activity and stability for ORR.The assembled Znair battery displayed larger power density of 186 mW·cm^(−2)than that of Pt/C+Ir/C-based battery.It also exhibits excellent stability without obvious voltage change after 106 cycles with 36 h.Combing in-situ Raman spectra with in-situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy(ATR-SEIRAS)characterization results indicated that the Mn-N_(4)site as an active site for the O_(2)adsorption-activation process,which effectively facilitates the generation of key*OOH intermediates and*OH desorption to promote the multielectron reaction kinetics.Theoretical calculation reveals that the excellent electrocatalytic performance originates from the charge redistribution and the d orbital shift resulting from Mn-Fe bond,which buffers the activity of ORR through the electron reservoir capable of electron donation or releasing.This work paves a novel IPP strategy for constructing high-performance coupling electrocatalyst towards the ORR for energy conversion devices. | Yuan Pan Min Li Wanliang Mi Minmin Wang Junxi Li Yilin Zhao Xuelu Ma Bin Wang Wei Zhu Zhiming Cui Hailiang Yin Yunqi Liu | 2022 | Nano Research2022，15，9： | 0 |
| 10 | Construction of N-doped carbon frames anchored with Co single atoms and Co nanoparticles as robust electrocatalyst for hydrogen evolution in the entire pH range显示文摘The development of low-cost, efficient, and high atomic economy electrocatalysts for hydrogen evolution reaction(HER) in the entire p H range for sustainable hydrogen production is of great importance but still challenging. Herein, we synthesize a highly dispersed N-doped carbon frames(NCFs) anchored with Co single atoms(SAs) and Co nanoparticles(NPs) catalyst by a doping-adsorption-pyrolysis strategy for electrocatalytic hydrogen evolution. The Co SAs-Co NPs/NCFs catalyst exhibits an excellent HER activity with small overpotential, low Tafel slope, high turnover frequency as well as remarkable stability. It also exhibits a superior HER performance in the entire p H range. Combining with experimental and theoretical calculation, we find that Co SAs with Co-N_(3) coordination structure and Co NPs have a strong interaction for promoting synergistic HER electrocatalytic process. The H_(2)O molecule is easily activated and dissociated on Co NPs, while the generated H^(*) is easily adsorbed on Co SAs for HER, which makes the Co SAs-Co NPs/NCFs catalyst exhibit more suitable H adsorption strength and more conducive to the activation and dissociation of H_(2)O molecules. This work not only proposes a novel idea for constructing coupling catalyst with atomic-level precision, but also provides strong reference for the development of high-efficiency HER electrocatalysts for practical application. | Minmin Wang Min Li Yilin Zhao Naiyou Shi Hui Zhang Yuxue Zhao Yaru Zhang Haoran Zhang Wenhong Wang Kaian Sun Yuan Pan Shoujie Liu Houyu Zhu Wenyue Guo Yanpeng Li Yunqi Liu Chenguang Liu | 2022 | Journal of Energy Chemistry2022，31，4： | 0 |
| 11 | Sowing the CED of Closer Cooperation显示文摘First China-U.S.Comprehensive Economic Dialogue charts the course The inaugural session of the China-U.S.Comprehensive Economic Dialogue(CED)in Washington,D.C.on July 19 has charted the course for economic cooperation between the world’s two largest economies with a one-year plan to deepen pragmatic cooperation and resolve outstanding problems. | Gao Pan Jin Minmin Jiang Yujuan | 2017 | Beijing Review2017，60，31： | 0 |
| 12 | Microneedles for Enhanced Topical Treatment of Skin Disorders:Applications,Challenges,and Prospects显示文摘Microneedles(MNs)can be used for the topical treatment of skin disorders as they directly deliver therapeutics to the site of skin lesions,resulting in increased therapeutic efficacy while having minimum side effects.MNs are used to deliver different kinds of therapeutics(e.g.,small molecules,macromolecules,nanomedicines,living cells,bacteria,and exosomes)for treating various skin disorders,including superficial tumors,wounds,skin infections,inflammatory skin diseases,and abnormal skin appearance.The therapeutic efficacy of MNs can be improved by integrating the advantages of multiple therapeutics to perform combination therapy.Through careful designing,MNs can be further modified with biomimetic structures for the responsive drug release from internal and external stimuli and to enhance the transdermal delivery efficiency for robust therapeutic outcomes.Some studies have proposed the use of drug-free MNs as a promising mechanotherapeutic strategy to promote wound healing,scar removal,and hair regeneration via a mechanical communication pathway.Although MNs have several advantages,the practical application of MNs suffers from problems related to industrial manufacture and clinical evaluation,making it difficult for clinical translation.In this study,we summarized the various applications,emerging challenges,and developmental prospects of MNs in skin disorders to provide information on ways to advance clinical translation. | Tingting Peng Yangyan Chen Wanshan Hu Yao Huang Minmin Zhang Chao Lu Xin Pan Chuanbin Wu | 2023 | Engineering2023，，11： | 0 |
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