Nature Communications
·
2026
·Vol. 17
·期 1
·2500
·
IF 18.1
Li Minghang,Fu Zhaoyuan,Luo Qian,Lu Bing,Zhang Liwei,Liang Shipan,Liu Ting,Wang Yong,Mao Shanjun
The entangled electronic and geometric effects in heterogeneous catalysis have long obscured precise attribution of their individual roles. By employing a thermal-induced surface reconstruction strategy to progressively enhance metal-support interactions, we achieve continuous tuning of Pd’s electronic and geometric structures. Using alkyne semi-hydrogenation as a prototypical structure-sensitive probe reaction, we demonstrate that despite the linear coupling of electronic and geometric structures during Pd reconstruction, the turnover frequency scales solely with the geometric descriptor W (quantifying Pd particle flattening), while selectivity regulation bifurcates into two distinct regimes: Below a critical W, electron-deficient Pd sites offset geometric constraints, yielding a non-structure-sensitive selectivity plateau; whereas above this threshold, electron-rich surfaces establish unequivocal geometric control. Moreover, surface reconstruction drastically shrinks the electronic-geometric space of Pd sites for over-hydrogenation side reaction. These insights provide a blueprint for metal catalysts regulation in hydrogenation and may open avenues for quantifying electronic-geometric interplay in other structure-sensitive reactions.
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高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2021
·Vol. 50
·期 4
·544-557
·
IF 1.677
Dong Shihua,Jia Bing,Chen Xiubin,Jiang Xiaobo
For separation of the azeotropes of water + 2-methyl-3-buten-2-ol by liquid–liquid extraction, methyl tert-butyl ether or butyl acetate or 4-methyl-2-pentanone or 2-ethyl-1-hexanol was selected as the extraction solvent. The liquid–liquid equilibrium (LLE) data for water + 2-methyl-3-buten-2-ol + (methyl tert-butyl ether/butyl acetate/4-methyl-2-pentanone/2-ethyl-1-hexanol) ternary systems at 308.2 K under 101.3 kPa were determined. The distribution coefficient and the separation factor were calculated to evaluate the extraction ability of different solvents. The Othmer–Tobias, Bachman, and Hand equations were applied to verify the reliability of the experimental LLE data. Meanwhile, the experimental LLE data were successfully correlated by the NRTL and UNIQUAC models with the root-mean-square deviations (RMSD) were less than 0.42%.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2024
·
IF 5.7
Yuyan Wei,Ling Xie,Bertrand Muhoza,Qian Liu,Shiqing Song
The present study investigated the impact of four chicken liver protein hydrolysate-based cat food attractants on palatability. Aroma compounds were analyzed in these attractants, which were subsequently sprayed onto four different types of cat foods. Results revealed that CF4 exhibited the highest intake ratio and the first choice ratio, followed by CF2 sample. Orthogonal partial least-squares discriminant analysis (OPLS-DA) demonstrated significant differences among 50 volatile compounds identified from the four cat foods. Using variable importance in projection (VIP) values, we selected 17 key flavor compounds responsible for distinguishing between the four cat foods. Peptides with a molecular mass <180 Da showed correlation with nonanoic acid and cedrol, while those >3000 Da correlated with hexanoic acid ethyl ester. Regression coefficients (RCs) calculated from partial least-squares regression (PLSR) results showed positive correlations between compound content and palatability for six compounds, whereas negative correlations were observed for ten compounds. Validation experiments confirmed that nonanal, 2-propylpyridine, and 3-octen-2-one enhanced palatability and correlated with peptides ranging from 180 to 500 Da; conversely, nonanoic acid ethyl ester and 3-methyl-pentanoic acid reduced palatability and correlated with peptides ranging from 1000 to 3000 Da.
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PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2024
·
IF 5.5
Yihai Yang,Hanlin Chen,Zhengnan Sun,Mingxing Bai,Guolin Jing,Yang Liu,Xiaoyan Liu
Background Waxy crude oil is widely distributed worldwide and is an important fossil energy resource. Polyoctadecyl acrylate (POA) is a commonly used pour point depressant for waxy crude oil. Methods The introduction of polar groups is a novel and effective way to improve the performance of polymeric pour point depressants. Based on the solution radical polymerization reaction, this study successfully synthesized copolymer pour point depressants with different monomer ratios of poly(octadecyl acrylate-methylbutenol) (POAM) for the first time. Significant Findings The results indicate that among all the synthesized copolymer pour point depressants, the best performance is achieved when the molar ratio of octadecyl acrylate to methylbutenol is 3:1 (POAM-2). The addition of POAM-2 pour point depressant not only lowered the viscosity of the oil sample but also resulted in a decrease of 19 °C in the pour point, 7.3 °C in the gelation point, and the wax appearance temperature of the oil sample decreased by 4.1 °C. Microscopic images confirm that the POAM-2 changes the morphology of wax crystals from large plates to spherical shapes. The wax crystals also become denser, thereby inhibiting the formation of a network structure and further improving the rheological properties of the model waxy oil.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Qianchun Zhang,Yuxian Zhao,Zhaoru Ban,Li Jiang,Shan Tang
Cataluminescence (CTL) sensors are among the most simple, inexpensive, sensitive, and selective tools for gas sensing. This study presented a highly efficient and selective CTL sensor system based on mesoporous SiO2 nanomicrospheres for the quick and sensitive analysis of isobutyraldehyde. Furthermore, its response intensity was 12.7 times higher than that of a nonmesoporous SiO2-based sensor. The constructed CTL sensor exhibited a good linear range (R2 = 0.997) for detecting isobutyraldehyde, spanning 3.11–311 ppm, with a low detection limit of 1.1 ppm. This enabled successful analysis of trace isobutyraldehyde in real samples. Finally, the CTL mechanism of this sensor was further explored. This study presents an approach for the quality detection of an important volatile organic compound, isobutyraldehyde, by a mesoporous-based CTL sensor.
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高影响因子
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