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您的检索式：作者名="Hengchang Lin"
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| 1 | Enhancing the Activity of N/C Catalyst for Oxygen Reduction Reaction by Fluorination显示文摘The synthesis of non-metal carbon catalysts with high catalytic activity for ORR(oxygen reduction reaction)in acidic media is a great challenge in the field of PEMFC(proton exchange membrane fuel cells).In this research,N-and F-codoped carbon catalyst with high performance was synthesized from ZIF-8 and NH4F,which are easily prepared structure and common chemical,respectively.The as-prepared catalyst has a high surface area of 789 m2/g and micro-porosity of~2 nm,facilitating more active sites to the ORR and O2 mass transfer in the diffusion of the catalyst matrix,respectively.The prepared N/C(NH4F)catalyst exhibited an onset potential of 0.94 V(vs.RHE)and a half-wave potential of 0.65 V in 0.1 M HClO4 solution.It also showed excellent durability in the cycling test of 10,000 times and a degradation shift of half-wave potential 70 mV was observed.Its diffusion-limiting current reached 5.85 mA/cm2 next to the theoretic value of 6 mA/cm2,suggesting that it has plenty of active sites for ORR,which could be attributed to fluorine introduction into the N/C catalyst.It proved that the introduction of fluorine into the structure of the N/C catalyst fine-tunes the Lewis basic sites of the carbon atoms adjacent to pyridinic and graphitic nitrogen species,facilitating the adsorption of oxygen molecules in the initial step of the ORR.The correlation between the N/C catalyst activity and the fluorination provides new insight into the ORR catalyst design. | Yun Wu Xinyu Lu Jiawei Li Hengchang Lin Maosen Pan Gengyu Cao Yuta Nabae | 2023 | 材料科学与工程(中英文A版)2023，13，3： | 0 |
| 2 | Plastome sequencing of Myripnois dioica and comparison within Asteraceae显示文摘Myripnois is a monotypic shrub genus in the daisy family constricted to northern China.Although wild populations of Myripnois dioica are relatively rare,this plant may potentially be cultured as a fine ornamental.In the present study,we sequenced the complete plastome of M.dioica,generating the first plastome sequences of the subfamily Pertyoideae.The plastome of M.dioica has a typical quadripartite circular structure.A large^20-kb and a small^3-kb inversion were detected in the large single copy(LSC)region and shared by other Asteraceae species.Plastome phylogenomic analyses based on 78 Asteraceae species and three outgroups revealed four groups,corresponding to four Asteraceae subfamilies:Asteroideae,Cichorioideae,Pertyoideae and Carduoideae.Among these four subfamilies,Pertyoideae is sister to Asteroideae+Cichorioideae;Carduoideae is the most basal clade.In addition,we characterized 13 simple sequence repeats(SSRs)that may be useful in future studies on population genetics. | Nan Lin Xu Zhang Tao Deng Jianwen Zhang Aiping Meng Hengchang Wang Hang Sun Yanxia Sun | 2019 | Plant Diversity2019，41，5： | 0 |
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