Base Metal Catalyst for Indirect Hydrogenation of CO2

Jagrit Grover; Suman Maji; Chitrala Teja; Shaeel A Al Thabaiti; Mohamed Mokhtar M Mostafa; Goutam K Lahiri; Debabrata Maiti

doi:10.1021/acsorginorgau.3c00023

Base Metal Catalyst for Indirect Hydrogenation of CO₂

ACS Org Inorg Au. 2023 Jul 24;3(5):299-304. doi: 10.1021/acsorginorgau.3c00023. eCollection 2023 Oct 4.

Authors

Jagrit Grover¹, Suman Maji¹, Chitrala Teja¹, Shaeel A Al Thabaiti², Mohamed Mokhtar M Mostafa², Goutam K Lahiri¹, Debabrata Maiti¹

Affiliations

¹ Department of Chemistry, IIT Bombay, Powai, Mumbai 400076, India.
² K. A. CARE Energy Research and Innovation Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia, Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.

Abstract

We herein report a novel Mn-SNS-based catalyst, which is capable of performing indirect hydrogenation of CO₂ to methanol via formylation. In this domain of CO₂ hydrogenation, pincer ligands have shown a clear predominance. Our catalyst is based on the SNS-type tridentate ligand, which is quite stable and cheap as compared to the pincer type ligands. The catalyst can also be recycled effectively after the formylation reaction without any significant change in efficiency. Various amines including both primary and secondary amines worked well under the protocol to provide the desired formylated product in good yields. The formed formylated amines can also be reduced further at higher pressures of hydrogen. As a whole, we have developed a protocol that involves indirect CO₂ hydrogenation to methanol that proceeds via formylation of amines.