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A new lipophilic monosaccharide from Erigeron annuus
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作者 sheng chao yang Jian Xin Pu +3 位作者 Ying Lu Feng Hui Xiao Wei Lie Xiao Han Dong Sun 《Chinese Chemical Letters》 SCIE CAS CSCD 2008年第10期1231-1233,共3页
A new lipophilic monosaccharide, erigearide A (1), was isolated from the aerial parts of Erigeron annuus (Lima.) Pers. Its structure was elucidated by analysis of spectroscopic evidence.
关键词 Erigeron annuus Lipophilic monosaccharide Erigearide A
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Highly dispersed Pt species anchored on W_(18)O_(49)nanowires mediate efficient and durable hydrogen evolution in acidic water 被引量:1
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作者 Wen Xin Li Zhi Yong Liu +5 位作者 sheng chao yang Jian Ning Wu Liang Sun En Guang Ma Hua Gui yang Xuhong Guo 《Science China Materials》 SCIE EI CAS CSCD 2022年第12期3435-3441,共7页
Platinum-based material is the most efficient and durable electrocatalyst for motivating the hydrogen evolution reaction(HER)in an acidic electrolyte;however,its low abundance and high cost limit its further applicati... Platinum-based material is the most efficient and durable electrocatalyst for motivating the hydrogen evolution reaction(HER)in an acidic electrolyte;however,its low abundance and high cost limit its further application in proton-exchange membrane water electrolysis(PEMWE)technology.Therefore,minimizing the Pt amount while retaining high activity would be desirable.Herein,we use defect-rich W_(18)O_(49)nanowires to anchor well-dispersed,ultrafine Pt species(Pt-W_(18)O_(49))via a freeze-drying method to avoid aggregation,further mediating an efficient and durable HER in acidic water.Density functional theory analyses also demonstrate that the strong electronic interaction between the Pt species and W_(18)O_(49)support greatly improves the HER performance.With a 1/10 Pt loading amount of the commercial 20 wt%Pt/C,the Pt-W_(18)O_(49)catalyst requires the overpotentials of 116 and 743 mV to achieve high current densities of 100 and 1000 mA cm^(−2)in 0.5 mol L^(−1)H_(2)SO_(4),outperforming those of the 20 wt%Pt/C benchmark.More importantly,the Pt-W_(18)O_(49)catalyst can sustain a high-currentdensity HER at 500 mA cm^(−2)for more than 38 h without obvious degradation.This work paves a new avenue for synergistically reducing the Pt amount and retaining high activity for real-world PEMWE. 展开更多
关键词 W_(18)O_(49)nanowires Pt species hydrogen evolution reaction high current density
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