Direct CO₂capture and conversion to fuels on magnesium nanoparticles under ambient conditions simply using water

Abstract

We demonstrated the use of magnesium nanoparticles (and bulk) to convert CO2 (pure & also from the air) to methane, methanol, formic acid and green cement without external energy within a few minutes, using only water as the sole hydrogen source.

Water coordinated on Cu(I)-based catalysts is the oxygen source in CO2 reduction to CO

“…This process started with the formation of [Cu(H 2 O)] + , which interacted with CO 2 to generate [Cu(H 2 O)(CO 2 )] + . As aforementioned, H 2 CO 3 formed after the reaction of CO 2 and H 2 O, thereby the occurrence of transition from [Cu(H 2 O)(CO 2 )] + to [Cu(H 2 CO 3 )] + , which was similar to the direct CO 2 capture and conversion to fuels over magnesium nanoparticles 54 . Subsequent H + /e − transfer reactions 46 , 48 , 70 led to the generation of [Cu(CO)] + , along with the elimination of two H 2 O molecules.…”

“…In contrast to the above routes, herein we discovered for the first time that the source of the O atom in CO originated from the H 2 O coordinated on transition metal-based catalysts (e.g., Cu, Ag, and Pd) rather than CO 2 . H 2 O is ubiquitous in nature and has been shown to be vital in many reactions such as alcohol oxidation to aldehyde 51 , CH 4 oxidation to CH 3 OH 52 , 53 , and CO 2 reduction to CH 4 , CH 3 OH, and HCOOH 54 . However, the role of H 2 O in the reduction of CO 2 to CO is ambiguous.…”

Strategic design of a bifunctional Ag(i)-grafted NHC-MOF for efficient chemical fixation of CO2 from a dilute gas under ambient conditions

“…[1][2][3][4][5] Hence, there is an urgent requirement to capture and utilize carbon dioxide as a useful C1 source for the synthesis of commodity chemicals/fuels. [6][7][8][9]10,[11][12][13][14][15][16][17] In particular, the flue gases from industries and power plants have the components of CO 2 (5-15%), N 2 (∼80%), nitrogen oxide (NOx; 0.06-0.4%), and sulfur oxide (SOx; 0.02-0.3%) and contribute significantly to the rise in the concentration of atmospheric CO 2 . 18 Furthermore, the capture of carbon dioxide from these flue gases having large quantities of N 2 is found to be an energy-demanding process.…”

A Moisture‐Assisted Rechargeable Mg−CO2 Battery

“…Besides battery systems outputting electric energy, Polshettiwar et al. developed a direct CO 2 capture and conversion method enabled by Mg nanoparticles and water to produce methane, methanol, and formic acid [14] . Nonetheless, it is worth mentioning that CO 2 utilization through interactions with Mg and H 2 O is feasible.…”