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| 1 | Amphiphilic Pd@micro-organohydrogels with controlled wettability for enhancing gas-liquid-solid triphasic catalytic performance显示文摘The wettability of catalyst plays an important role in regulating catalytic performance in heterogenous catalysis because the microenvironment around the catalytic sites directly determines the mass transfer process of reactants.Inspired by gas trapped on the surface of subaquatic spiders,amphiphilic micro-organohydrogels with tunable surface wettabilities were developed by anchoring various alkane chains onto a poly(2-(dimethylamino)ethyl methacrylate)(p(DMAEMA))hydrophilic microgel network.Palladium nanoparticles(Pd NPs)were encapsulated in amphiphilic microgels(amphiphilic Pd@M)to catalyze hydrogenation reaction,achieving higher activities than pristine monohydrophilic Pd@M composite.The underwater oleophilicity and aerophilicity of Pd@M composites were quantified by oil/gas adhesion measurements and computational simulations.The higher amphiphilic catalytic activities are attributed to the formation of a gas-oil-solid reaction interface on the catalyst surfaces,allowing rapid transport of H2 and organic substrates through water to the Pd catalytic sites.Additionally,amphiphilic Pd@M composites also exhibit more superior catalytic performance in multi-substrates reaction. | Minghui Zhang Tianyi Zhao Cunming Yu Qian Liu Guangyan Wang Hui Yang Ming Yang Lei Jiang Mingjie Liu | 2022 | Nano Research2022，15，1： | 2 |
| 2 | Smart Manipulation of Gas Bubbles in Harsh Environments Via a Fluorinert-Infused Shape-Gradient Slippery Surface显示文摘Fundamental research and practical applications have examined the manipulation of gas bubbles on open surfaces in lowsurface-tension,high-pressure,and high-acidity,-alkalinity,or-salinity environments.However,to the best of our knowledge,effi cient and general approaches to achieve the smart manipulation of gas bubbles in these harsh environments are limited.Herein,a Fluorinert-infused shape-gradient slippery surface(FSSS)that could eff ectively regulate the behavior of gas bubbles in harsh environments was successfully fabricated.The unique capability of FSSS was mainly attributed to the properties of Fluorinert,which include chemical inertness and incompressibility.The shape-gradient morphology of FSSS could induce asymmetric driving forces to move gas bubbles directionally on open surfaces.Factors infl uencing gas bubble transport on FSSS,such as the apex angle of the slippery surface and the surface tension of the aqueous environment,were carefully investigated,and large apex angles were found to result in large initial transport velocities and short transport distances.Lowering the surface tension of the aqueous environment is unfavorable to bubble transport.Nevertheless,FSSS could transport gas bubbles in aqueous environments with surface tensions as low as 28.5±0.1 mN/m,which is lower than that of many organic solvents(e.g.,formamide,ethylene glycol,and dimethylformamide).In addition,FSSS could also realize the facile manipulation of gas bubbles in various aqueous environments,e.g.,high pressure(~6.8 atm),high acidity(1 mol/L H 2 SO 4),high alkalinity(1 mol/L NaOH),and high salinity(1 mol/L NaCl).The current fi ndings provide a source of knowledge and inspiration for studies on bubble-related interfacial phenomena and contribute to scientifi c and technological developments for controllable bubble manipulation in harsh environments. | Guoliang Liu Chunhui Zhang Mengfei Liu Ziwei Guo Xinsheng Wang Cunming Yu Moyuan Cao | 2020 | Transactions of Tianjin University2020，26，6： | 1 |
| 3 | Engineering electrode wettability to enhance mass transfer in hydrogen evolution reaction显示文摘In hydrogen evolution reaction,inefficient mass transfer caused by bubble adhesion on electrode,bubble dispersion in electrolyte and slow H2 diffusion,has greatly impeded the reaction process.Existing techniques can only resolve bubble adhesion or bubble dispersion problems.Strategy that simultaneously solve bubble adhesion,bubble dispersion and poor hydrogen diffusion problems is rarely reported.Recently,an article reported a new electrode with special wettability design,which can efficiently promote bubble transfer and dissolved H2 diffusion.This design can simultaneously solve above mentioned three mass transfer issues and improve electrode efficiency.We summarize the remaining challenges of this work and outlook potential approaches to promote mass transfer in gas-evolution reactions. | Chunhui Zhang Ziwei Guo Ye Tian Cunming Yu Kesong Liu Lei Jiang | 2023 | Nano Research Energy2023，2，2： | 1 |
| 4 | Bubble transfer on wettability-heterogeneous surfaces显示文摘Researches have investigated the formation, transportation and spreading of bubble on solid surface with specific wettability. However, bubble transfer on wettability-heterogeneous surfaces has been rarely reported, which also plays significant role in water electrolysis, heat transfer, micro-bubble collection, etc.In this work, we carefully investigate the behavior of bubble transfer from the aerophobic or aerophilic region to the superaerophilic region through fabricating the wettability-heterogenous surfaces. Surface energy was elucidated to be transformed to the kinetic energy during bubble transfer process. Theoretical analysis on the average velocity of bubble transfer was consistent with the experimental results.The influence of wettability of solid substrate, bubble volume and superaerophilic stripe width on bubble transfer are carefully investigated. Moreover, wettability-heterogeneous surfaces were explored to be applied in micro-CO_(2) bubble collection and H_(2) bubble removement in water splitting. | Chunhui Zhang Xiao Xiao Ziwei Guo Lei Jiang Cunming Yu | 2023 | Chinese Chemical Letters2023，34，7： | 0 |
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