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| 1 | Carbon quantum dots for advanced electrocatalysis显示文摘Zero-dimensional(0D)carbon quantum dots(CQDs),as a nanocarbon material in the carbon family,have garnered increasing attention in recent years due to their outstanding features of low cost,nontoxicity,large surface area,high electrical conductivity,and rich surface functional groups.By virtue of their rapid electron transfer and large surface area,CQDs also emerge as promising functional materials for the applications in energy-conversion sectors through electrocatalysis.Besides,the rich functional groups on the surface of CQDs offer abundant anchoring sites and active sites for the engineering of multicomponent and high-performance composite materials.More importantly,the heteroatom in the CQDs could effectively tailor the charge distribution to promote the electron transfer via internal interactions,which is crucial to the enhancement of electrocatalytic performance.Herein,an overview about recent progress in preparing CQDs-based composites and employing them as promising electrode materials to promote the catalytic activity and stability for electrocatalysis is provided.The introduced CQDs could enhance the conductivity,modify the morphology and crystal phase,optimize the electronic structure,and provide more active centers and defect sites of composites.After establishing a deep understanding of the relationship between CQDs and electrocatalytic performances,the issues and challenges for the development of CQDs-based composites are discussed. | Lin Tian Zhao Li Peng Wang Xiuhui Zhai Xiang Wang Tongxiang Li | 2021 | Journal of Energy Chemistry2021，30，4： | 7 |
| 2 | Enhancing the dynamic electron transfer of Au species on wormhole-like TS-1 for boosting propene epoxidation performance with H_(2) and O_(2)显示文摘Engineering unique electronic structure of catalyst to boost catalytic performance is of prime scientific and industrial importance.Herein,the identification of intrinsic electronic sensitivity for direct propene epoxidation was first achieved over highly stable Au/wormhole-like TS-1 catalyst.Results show that the electron transfer of Au species can be regulated by manipulating the dynamic evolutions and contents of Au valence states,thus resulting in different catalytic performance in 100 h time-on-stream.By DFT calculations,kinetic analysis and multicharacterizations,it is found that the Au^(0) species with higher electronic population can easily transfer more electrons to activate surface O_(2) compared with Au^(1+) and Au^(3+) species.Moreover,there is a positive correlation between Au^(0) content and activity.Based on this correlation,a facile strategy is further proposed to boost Au^(0) percentage,resulting in the reported highest PO formation rate without adding promoters.This work harbors tremendous guiding significance to the design of highly efficient Au/Ti-containing catalyst for propene epoxidation with H_(2) and O_(2). | Dong Lin Xiuhui Zheng Xiang Feng Nan Sheng Zhaoning Song Yibin Liu Xiaobo Chen Zhenping Cai De Chen Chaohe Yang | 2020 | Green Energy & Environment2020，5，4： | 1 |
| 3 | Host-Defense-Peptide-Mimickingβ-Peptide Polymer Acting as a Dual-Modal Antibacterial Agent by Interfering Quorum Sensing and Killing Individual Bacteria Simultaneously显示文摘Host defense peptides(HDPs)are one of the potentially promising agents for infection diseases due to their broad spectrum and low resistance rate,but their clinical applications are limited by proteolytic instability,high-cost,and complicated synthesis process.Here,we report a host-defense-peptidemimickingβ-peptide polymer that resists proteolysis to have enhanced the activity under physiological conditions,excellent antimicrobial efficiency even at high density of bacteria,and low cost for preparation.Theβ-peptide polymer demonstrated quorum sensing(QS)interference and bactericidal effect against both bacterial communities and individual bacterium to simultaneously block bacterial communication and disrupt bacterial membranes.The hierarchical QS network was suppressed,and main QS signaling systems showed considerably down-regulated gene expression,resulting in excellent biofilm eradication and virulence reduction effects.The dual-modal antibacterial ability possessed excellent therapeutic effects in Pseudomonas aeruginosa pneumonia,which could inhibit biofilm formation and exhibit better antibacterial and anti-inflammatory efficiency than clinically used antibiotics,levofloxacin.Furthermore,theβ-peptide polymer also showed excellent therapeutic effect Escherichia coli pyogenic liver abscess.Together,we believed that theβ-peptide polymer had a feasible clinical potential to treat bacterial infection diseases. | Wanlin Li Ximian Xiao Yuchen Qi Xiuhui Lin Huiqun Hu Minqi Shi Min Zhou Weinan Jiang Longqiang Liu Kang Chen Kai Wang Runhui Liu Min Zhou | 2023 | Research2023，，4： | 0 |
| 4 | The missing base molecules in atmospheric acid–base nucleation显示文摘Transformation of low-volatility gaseous precursors to new particles affects aerosol number concentration,cloud formation and hence the climate.The clustering of acid and base molecules is a major mechanism driving fast nucleation and initial growth of new particles in the atmosphere.However,the acid–base cluster composition,measured using state-of-the-art mass spectrometers,cannot explain the measured high formation rate of new particles.Here we present strong evidence for the existence of base molecules such as amines in the smallest atmospheric sulfuric acid clusters prior to their detection by mass spectrometers.We demonstrate that forming(H_(2)SO_(4))1(amine)1 is the rate-limiting step in atmospheric H_(2)SO_(4)-amine nucleation and the uptake of(H_(2)SO_(4))1(amine)1 is a major pathway for the initial growth of H_(2)SO_(4)clusters.The proposed mechanism is very consistent with measured new particle formation in urban Beijing,in which dimethylamine is the key base for H_(2)SO_(4)nucleation while other bases such as ammonia may contribute to the growth of larger clusters.Our findings further underline the fact that strong amines,even at low concentrations and when undetected in the smallest clusters,can be crucial to particle formation in the planetary boundary layer. | Runlong Cai Rujing Yin Chao Yan Dongsen Yang Chenjuan Deng Lubna Dada Juha Kangasluoma Jenni Kontkanen Roope Halonen Yan Ma Xiuhui Zhang Pauli Paasonen Tuukka Petaja Veli-Matti Kerminen Yongchun Liu Federico Bianchi Jun Zheng Lin Wang Jiming Hao James N.Smith Neil M.Donahue Markku Kulmala Douglas R.Worsnop Jingkun Jiang | 2022 | National Science Review2022，9，10： | 0 |
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