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The slower kinetics of the deuterium evolution reaction (DER) than the hydrogen evolution reaction (HER) renders conventional Pt-based HER catalysts inefficient in the DER. Their further improvement requires precise tuning of intermediate adsorption energy which is already near optimum on pure Pt. Herein, we achieved superior DER/HER performance by combining Pt and a dual support system consisting of V2O3 and V8C7 that exert different electronic effects on Pt. In 1 M NaOD (NaOH) and 0.5 M D2SO4 (H2SO4), the optimal Pt/V2O3/V8C7 catalyst exhibited low overpotentials of 37 mV (15 mV) and 49 mV (45 mV) at a current density of 10 mA cm−2, respectively. Its mass activity based on the amount of Pt was up to 9 times higher than that of commercial Pt/C, leading to a reduction of cell voltage by 0.5 V in PEM electrolysis of D2O at 1000 mA cm−2. X-ray photoelectron spectroscopy and underpotential H deposition showed that electron-withdrawing effects of V2O3 over-weakened intermediate adsorption on Pt/V2O3 while Pt/V8C7 had insufficient metal–support interaction of such kind. A balanced effect was only achieved with the dual support system, which accounts for the excellent performance of Pt/V2O3/V8C7. This study provides a new perspective on the modulation of metal–support interaction in Pt-based electrocatalysts and demonstrates potential application of the Pt/V2O3/V8C7 in industrial production of D2. [ABSTRACT FROM AUTHOR]

Deuterium‐labeled compounds, particularly deuterium‐doped aniline aromatics, play a crucial role in chemistry, environment, and biology. However, the conventional deuteration method relies on a hydrogen atmosphere, which poses limitations for sensitive substrates containing halogen functional groups. This is due to the potential occurrence of additional reactions in these reactive sites. This study utilized Pt/CeO2‐OV catalyst to achieve efficient deuterium doping (98%) of aniline under hydrogen gas‐free condition, while avoiding hydrogenation side reactions. The significance of oxygen vacancies and metal‐catalyst interactions in the catalyst support is demonstrated through experimental characterization. When facing sensitive functional groups, including halogens, the proposed method avoids dehalogenation or hydrogenation of the benzene ring. This study provides a practical and efficient solution for deuteration of sensitive groups, holding substantial theoretical and practical implications. [ABSTRACT FROM AUTHOR]

Deuterium‐labeled polyols are one of the most extensive applied chemicals in biochemistry and biophysics. However, the deuteriation still is insufficient, exhibiting a low deuterated ratio and indistinct reaction mechanism. Herein, Ru supported on MnBCD (MnBDC, derived from Mn p‐phthalic acid metal‐organic framework) as nanocatalyst with an agglomerated sheet‐type structure; this allows the possibility of achieving both thermo‐ and electrocatalytic hydrogen isotope exchange (HIE) reaction. Furthermore, XPS characterization confirmed that the specific structural changes in the electron density of Ru outer layers were modulated through the impregnation and reduction processes. According to the change of outer electronic structure, hydrogen spillover and electron‐rich flow promote the reaction of the catalyst in thermo‐ and electrocatalytic systems, respectively. In addition, the results indicate that a high deuterated ratio of 97 % can be obtained, hence the catalytic technology has enormous potential for the synthesis of a broad variety of deuterium‐labeled compounds. [ABSTRACT FROM AUTHOR]

The catalytic conversion of CO or CO/CO2 mixtures to higher alcohols (HAs) using hydrogenation reactions remains challenging in C1 chemistry and also one of the most promising reactions for the utilization of non-petroleum resources. Here, the experiment and characterization tests of CuCoMn/Al2O3 show that copper is much more dispersed on γ-Al2O3 than cobalt, and the interaction between cobalt and Mn metals is stronger. And, mixed cobalt–manganese oxides are formed in the calcined catalyst, promoting the formation of higher alcohols. Under the optimum conditions, the catalyst demonstrated a total alcohol selectivity of 44.6%, and the fraction of higher alcohols reached up to 85.3% among the total alcohol products, which is superior to the classical modified CuCo-based catalysts. And in the gas mixture reaction with a CO : CO2 ratio of 8 : 2, the conversion rate of the catalyst to CO and CO2 reached 34.8% and 27.3%, respectively, and the selectivity (C1+ slate 1-alcohol) was 53.2%. [ABSTRACT FROM AUTHOR]

Densities and refractive indices are investigated for four binary mixture systems of dimethylvinylethoxysilane with n-heptane, n-octane, n-nonane and n-decane at different temperatures (298.15, 303.15, 308.15, 313.15 and 318.15 K) and atmospheric pressure. From these experimental data, the excess molar volume, isobaric coefficient of thermal expansion, deviation in refractive index, molar refraction, and deviation in the molar refraction have been calculated. The computed quantities have been fitted with the Redlich-Kister equation to derive the coefficients and estimate the standard deviations. The values of the partial excess volume at infinite dilution were calculated using the coefficients of the Redlich-Kister smoothing equation. The effects of composition and temperature on these properties are discussed. [ABSTRACT FROM AUTHOR]

The catalytic conversion of CO or CO/CO 2 mixtures to higher alcohols (HAs) using hydrogenation reactions remains challenging in C1 chemistry and also one of the most promising reactions for the utilization of non-petroleum resources. Here, the experiment and characterization tests of CuCoMn/Al 2 O 3 show that copper is much more dispersed on γ-Al 2 O 3 than cobalt, and the interaction between cobalt and Mn metals is stronger. And, mixed cobalt-manganese oxides are formed in the calcined catalyst, promoting the formation of higher alcohols. Under the optimum conditions, the catalyst demonstrated a total alcohol selectivity of 44.6%, and the fraction of higher alcohols reached up to 85.3% among the total alcohol products, which is superior to the classical modified CuCo-based catalysts. And in the gas mixture reaction with a CO : CO 2 ratio of 8 : 2, the conversion rate of the catalyst to CO and CO 2 reached 34.8% and 27.3%, respectively, and the selectivity (C1+ slate 1-alcohol) was 53.2%.