23102-86-5Relevant articles and documents
Molecular H2O promoted catalytic bicarbonate reduction with methanol into formate over Pd0.5Cu0.5/C under mild hydrothermal conditions
Wang, Xiaoguang,Yang, Yang,Zhong, Heng,Wang, Tianfu,Cheng, Jiong,Jin, Fangming
, p. 430 - 439 (2021/01/29)
Direct reduction of bicarbonate, a typical product of CO2 captured in alkaline solution, into value-added organics is one promising way to achieve a simplified and green CO2 capture and utilization process. In this work, a new strategy of bicarbonate reduction coupled with methanol oxidation into a dual formation of formate under mild hydrothermal conditions is reported. A 68% formate production efficiency based on the reductant methanol and nearly 100% selectivity of formate were obtained via a Pd0.5Cu0.5/C catalyst at 180 °C. An operando hydrothermal ATR-FTIR study proved that the bicarbonate was reduced by the in situ generated hydrogen from methanol, which was stepwise oxidized to formaldehyde and formic acid. Notably, DFT calculations and a qNMR study of the 13C and 2H (D) isotopic labelling revealed that H2O molecules not only supplied the hydrogen for bicarbonate reduction but also acted as an indispensable promoter to enhance the catalytic performance of Pd0.5Cu0.5/C for methanol activation.
A nanoporous nickel catalyst for selective hydrogenation of carbonates into formic acid in water
Wang, Tian,Ren, Dezhang,Huo, Zhibao,Song, Zhiyuan,Jin, Fangming,Chen, Mingwei,Chen, Luyang
, p. 716 - 721 (2017/08/17)
An efficient unsupported nanoporous nickel (NiNPore) material for the hydrogenation of carbonates to formic acid (FA) in water was investigated for the first time. NiNPore is an environmentally benign catalyst and it exhibited remarkable catalytic activity in the reduction of a wide range of carbonates to afford formic acid in excellent yields with high selectivity, and maximum values of 86.6% from NaHCO3 and even up to 92.1% from KHCO3 were obtained. The hydrogen pressure and pKa of the carbonates had a significant influence on the formation of FA. The catalyst was easily recovered and could be recycled at least five times without leaching and loss of activity. The present study demonstrated a potential application for the synthesis of FA from CO2 or carbonate compounds.
Water-soluble analogs of [RuCl3(NO)(PPh3) 2] and their catalytic activity in the hydrogenation of carbon dioxide and bicarbonate in aqueous solution
Kathó, ágnes,Opre, Zsuzsanna,Laurenczy, Gábor,Joó, Ferenc
, p. 143 - 148 (2008/10/08)
The new water-soluble ruthenium-nitrosyl complexes [RuCl 3(NO)(TPPMS)2] and [RuCl3(NO)(TPPTS) 2] were synthetized and characterized by IR, 1H and 31P NMR spectroscopies. The NO stretching frequencies, v NO = 1870 cm-1 (TPPMS) and 1883 cm-1 (TPPTS) suggest a linear Ru-N-O arrangements. Reactions with OH- yield the corresponding [RuCl3(NO2)(P)2] derivatives, furthermore, [RuH(NO)(P)3] is formed with TPPMS or TPPTS, respectively, under 100 bar H2 pressure. The new complexes are suitable precatalysts for the hydrogenation of carbon dioxide and/or bicarbonate in aqueous solutions up to a tumover frequency of 400 h -1 under relatively mild conditions (30 bar H2, 70 °C).
