基于钙钛矿的表面纳米结构调控和单原子负载的单原子光催化研究

本研究旨在探讨钙钛矿表面纳米结构调控和单原子负载在光催化中的应用。钙钛矿作为重要的光催化材料,其表面纳米结构对催化性能起关键作用。单原子负载在钙钛矿表面能提高催化活性,而纳米结构调控可进一步提高催化效率和稳定性。我们介绍了钙钛矿表面纳米结构调控方法,包括合成方法和纳米结构表征方法。同时,探讨了单原子负载对钙钛矿纳米结构的影响,涉及形貌、晶体缺陷和光学特性等方面的表征,并通过光催化反应评估其催化活性。最后,我们总结了钙钛矿表面纳米结构调控与单原子负载的协同作用在光催化中的应用潜力,并展望了优化纳米结构和单原子负载方法的未来研究方向。

析氧反应铁镍基预催化剂的表界面调控与进展

析氧反应(OER)是水分解中重要的半反应,为提高其催化性能,开发高效非贵金属催化剂已成为当前的研究重点。铁镍(FeNi)基材料被认为是最好的预催化剂,在催化过程中,它们的表面将转变成高价态金属氧化物或氢氧化物作为真正的活性物质。FeNi基预催化剂的结构和形貌在很大程度上影响了其催化性能,因此,优化和调整FeNi基预催化剂的结构和化学环境可以提高电催化性能。基于我们的研究工作,我们撰写了FeNi基预催化剂的表面结构调控促进电化学析氧反应的研究进展。我们首先介绍了碱性OER的反应机理,然后从杂原子掺杂、表面成分改性、选择性结构转变、表面化学状态调节、异质结构构建和载体效应等方面讨论了FeNi基预催化剂表面调控对析氧反应性能的影响。尽管在OER反应中FeNi都被认为转变成高价态的金属活性物质,Fe/Ni体系的表面结构、形貌和化学状态仍然能够显著影响其最终的催化性能,即FeNi基预催化剂的性质会影响析氧反应的催化性能。通过精细设计并尽量提高Fe和Ni的协同作用将有利用提升氧析出的催化性能。我们希望本综述能够对FeNi基预催化剂的制备和表界面性质调控与电催化析氧反应性能的理解有所帮助。

Modulating the microstructure and surface chemistry of carbocatalysts for oxidative and direct dehydrogenation: A review

The catalytic performance of solid catalysts depends on the properties of the catalytically active sites and their accessibility to reactants, which are significantly affected by the microstructure（morphology, shape, size, texture, and surface structure） and surface chemistry（elemental components and chemical states）. The development of facile and efficient methods for tailoring the microstructure and surface chemistry is a hot topic in catalysis. This contribution reviews the state of the art in modulating the microstructure and surface chemistry of carbocatalysts by both bottom‐up and top‐down strategies and their use in the oxidative dehydrogenation（ODH） and direct dehydrogenation（DDH） of hydrocarbons including light alkanes and ethylbenzene to their corresponding olefins, important building blocks and chemicals like oxygenates. A concept of microstructure and surface chemistry tuning of the carbocatalyst for optimized catalytic performance and also for the fundamental understanding of the structure‐performance relationship is discussed. We also highlight the importance and challenges in modulating the microstructure and surface chemistry of carbocatalysts in ODH and DDH reactions of hydrocarbons for the highly‐efficient, energy‐saving,and clean production of their corresponding olefins.

Dual-responsive shape memory polymer arrays with smart and precise multiple-wetting controllability

Smart-controlled surface wettability from superhydrophilicity to superhydrophobicity has been extensively explored,and stimulus-responsive strategies have been widely accepted as a useful method to realize reversibility.However,achieving smart and precise wetting control remains challenging because most previous studies focused on stimulating single surface chemistry or microstructures.Herein,a dualstimulus-responsive strategy that can synergistically stimulate surface chemistry and microstructures is demonstrated on the pH-responsive molecule poly(2-(diisopropylamino)ethyl methacrylate(PDPAEMA)-modified temperature-triggered shape memory polymer(SMP)arrays.The responsive PDPAEMA and SMP can provide the surface with tunable surface chemistry and microstructures,respectively.Thus,the wetting of the surface between various states can be reversibly and precisely controlled from superhydrophilicity to superhydrophobicity with contact angle(CA)differences of less than 15° under the cooperative effect between the adjustable surface microstructure and chemistry.The surface is further utilized as a platform to create gradient wettings based on its excellent controllability.Therefore,this work presents a strategy for surface wetting control by combining tunable surface microstructures and chemistry.The prepared samples with a special wetting controllability can be applied to numerous fields,including adaptive liquid microlenses,accurate drug release,and selective catalysis.This work also proposes novel expectations in designing smart functional surfaces.