Everything's gone green: The selective oxidation of aromatic alcohols to aldehydes has been achieved by use of a green energy source and solvent combination. Solar energy with a recyclable Pt/TiO2 photocatalyst in water at ambient temperature brought about the desired oxidation with high selectivity and relatively long‐term stability.

Direct methanol fuel cell (DMFC) is considered as one of the next-generation power sources for portable electronic devices. However, the problems of structure and materials of the membrane electrode assembly (MEA) must be resolved if it is applied in flexible electronic devices. The traditional materials of MEA used in DMFC cannot bend and are easy to break. Moreover, the existence of a microporous layer increases the likelihood of separation of the gas diffusion layer (GDL) and catalytic layer. Herein, we develop a simple electrospinning method to prepare flexible titanium carbide/carbon nanofibers (TiC/CNFs) film used as GDL. TiC/CNFs film plays a GDL and a microporous layer dual role. The MEA exhibits enhancing performance and excellent flexibility. The maximum power density of flexible DMFC can reach 20.2 mW/cm 2 , compared with the GDL made of traditional carbon cloth (18.1 mW/cm 2 ), the maximum power density rises by 11.6%. After 50 consecutive bends, the voltage drops less than 10%. This work would promote the flexibility of DMFC.

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Hydrophilic 2D layered silicate supported Fe 3 O 4 catalyst (Fe 3 O 4 /2D-LS) was prepared by an impregnation method and showed greatly improved olefin selectivity in CO hydrogenation. The olefin ratio (O/P) on Fe 3 O 4 /2D-LS was increased from 0.50 to 6.05 compared with that of single Fe 3 O 4 . Surprisingly, the Fe 3 O 4 /2D-LS catalysts had an enhanced chain growth ability and promoted the formation of linear α-olefin in C 5 + hydrocarbons increasing from 33.5 to 72.5%. Characterizations showed that layered structure and hydrophilic properties maintained during a CO hydrogenation test. The Fe 3 O 4 supported 2D-LS was easier to reduction and promoted the CO adsorption. The hydroxyl groups on the 2D-LS detected by CA and Zeta may help to increase the selectivity of olefin by inhibiting the secondary reaction of primary olefins.

The first mass migration in China took place at the end of the Western Jin, which resulted in the southward transfer of the Central Plains Culture and brought about huge social changes. Such social changes exerted significant impacts on the gentry of the Jin Dynasty. This paper used a huge volume of Classical Chinese legacy text of Jin gentry members. We used CC-LIWC to calculate frequencies of different word categories used in these text contents and conducted an analysis of variance to measure significant differences between the three groups. We found 16 categories of words with significant differences and calculated their effect sizes, such as tense markers (tensem), F = 3.588, P < 0.05, η2 = 0.034; modal particles (modal_pa), F = 3.468, P < 0.05, η2 = 0.053; words for affective processes (affect), F = 3.096, P < 0.05, η2 = 0.028; words for cognitive processes (cogproc), F = 3.308, P < 0.05, η2 = 0.031; words for perceptual processes (percept), F = 7.137, P < 0.05, η2 = 0.06. Combining the psycholinguistics of the 16 categories of words and researches of historians on the Jin Dynasty, we then analyzed the direct and indirect, immediate and long-lasting psycholinguistic impacts of this mass migration on the gentry themselves and their descendants.

LIBs are widely considered as an ideal flexible energy storage device due to their high energy density and long cycle life. [3] However, numerous problems remain for flexible LIBs to meet commercial LIB criteria, such as a gravimetric energy density of 250 Wh kg −1 .Direct methanol fuel cell (DMFC) is a typical and excellent model for these devices, and will serve as an intriguing candidate for the future flexible energy source due to its high energy density (4820 Wh L −1 , much greater than LIBs). The greatest power density of flexible DMFC based on the quasi-solid potassium polyacrylate hydrogel electrolyte has recently been reported to be 8.86 mW cm −2 . [13] However, progress in studies on DMFC flexibility is still sluggish, and the main causes are as follows. 1) Graphite or metal plates, which are typically too heavy, mechanical, and hard to be used with flexible electronic components, are used as flow channels and collectors in traditional DMFC. [14] 2) Due to its strong electronic conductivity, porosity that facilitates mass transfer, and great chemical stability, carbon paper is frequently utilized as a supporting layer of the membrane electrode assembly (MEA) in conventional DMFC. However, because of its mechanical rigidity, carbon paper is not appropriate for flexible DMFC. [15] 3)In order to create flexible DMFC, it is currently extremely difficult to choose and design flexible porous electrode materials with ideal mechanical properties and excellent electrical conductivity. [16] 4) Due to the usage of liquid fuel, the DMFC is orientation sensitive and fuel leakage is simple, which increases the complexity of structure and the difficulty in preparation procedure. [17] The flexible porous electrode serves as a bipolar plate in addition to its role in MEA. In current flexible devices, carbon fiber, [18] carbon nanotubes, [19] graphene, [20] carbon cloth, [21][22][23] and silver nanoparticles [19] are usually used as porous electrode materials. Although the possibilities for using carbon nanotubes, graphene, and other nanomaterials are increased by their high electrical conductivity and excellent chemical properties, it is still challenging to produce flexible electrodes in large quantities with high mechanical performance. Carbon cloth is a wellresearched material with excellent mechanical strength, flexibility, and superior electrical conductivity compared to CNT and graphene, which makes it more suitable for current collection.It is vital to create flexible batteries as power sources to suit the needs of flexible electronic devices because they are widely employed in wearable and portable electronics. The direct methanol fuel cell (DMFC) is a desirable alternative portable energy source since it is a clean, safe, and high energy density cell. The traditional DMFC in mechanical assembly and its unbending property, however, prevent it from being employed in flexible electrical devices. In this study, the flexible membrane electrode assembly (MEA) with superior electrical conductivity and nanoscale TiC-mo...

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The simultaneous realization of high olefin/paraffin (O/P) ratio and low CH4 selectivity has always been a bottleneck for the conversion of syngas to high‐value olefins (HVOs). Magadiite (MAG) is a layered silicate material with active SiOH, which increases the interlayer charge density and ion‐exchange ability. Herein, a MAG‐supported, Mn‐modified Fe3O4 microsphere catalyst exhibits excellent CO conversion of 76.5 % and HVO selectivity, with a high O/P ratio of 5.02 and low CH4 selectivity of 16.1 % for conversion of syngas to HVOs. The layered structure of the MAG support promotes dispersion of the active centers and the Mn promoter improves the basic properties of the catalyst. Moreover, the Mn promoter and MAG support have a synergistic effect, which promotes CO dissociation and suppresses H2 adsorption, thereby resulting in high HVO selectivity and low CH4 selectivity.