64165-14-6Relevant articles and documents
Catalytic hydrogenation of CO2from airviaporous silica-supported Au nanoparticles in aqueous solution
Lennox, R. Bruce,Li, Chao-Jun,Ni, Siting,Roy, Ranjan,Zhu, Jun
, p. 3740 - 3749 (2021/06/06)
The conversion of the ubiquitous greenhouse gas CO2to valuable organic products is much sought after. Herein, the hydrogenation of CO2to C1 products with an 80% yield in water is reported using a novel catalyst, porous-silica-supported Au nanoparticles (Au/SiO2). In the presence of a Lewis acid, boric acid, the Au/SiO2catalyst enables an efficient conversion of amine-captured CO2to methanol, formate, and formamide. A mechanistic study involving isotopic labelling suggests that methanol production in the catalytic process arises from the direct hydrogenation of formate. Most importantly, this one-pot, two-step process is able to convert CO2in air at ambient pressures to C1 products in the absence of an organic solvent. Furthermore, the catalyst is readily recycled without further purification or reactivation and shows no significant decrease in catalytic activity after four reaction cycles in a reusability test.
Facile hydrogenation of bicarbonate to formate in aqueous medium by highly stable nickel-azatrane complex
Sivanesan, Dharmalingam,Seo, Bongkuk,Lim, Choong-Sun,Kim, Hyeon-Gook
, p. 121 - 128 (2020/01/03)
Molecular catalyst-based direct hydrogenation of bicarbonate to formate in aqueous medium is a challenging research topic for the H2 storage. Finding a green and effective method for the bicarbonate to formate conversion with non-precious metal-based catalyst is vital to the practical application. We report the direct hydrogenation of bicarbonate to formate using a water soluble nickel-azatrane complex. Catalysts 1–5, designed and synthesized, were screened for the hydrogenation of bicarbonate to formate in aqueous medium; the best TON of 121 was obtained for catalyst 4 at 120 °C (60 bar). Introduction of isopropyl (2) and methyl (3 and 4) groups in the coordination environment of the metal center enhances the production of formate. Further, the hydrogenation of bicarbonate with CO2 promoted the formate production for catalyst 4 with a TON of 92 (3 h). The use of green solvent and non-precious metal catalyst makes this catalytic method environmentally sustainable.
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
supporting information, 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.
