Abstract
Thermo-catalytic hydrogenation of CO(2) to fuels and chemicals is an effective way to utilize CO(2), but it faces significant challenges due to low CO(2) conversion and product selectivity. Here, we report a lattice-strained FeZnNa catalyst synthesized via a mechanochemical method (FeZnNa-G), showing a high selectivity for C(4+) long-chain olefins (C(4+) (=)) of 64.9% and C(2+) (=) of 77.5% at a high CO(2) conversion rate of 47.7%. We found that the lattice-contracted FeZnNa-G catalyst forms Na-enriched ZnO nano-islands on the surface after activation and a Na-ZnO/Fe(5)C(2) structure with the presence of 97% Fe(5)C(2), facilitating the formation of an HCOO* intermediate and enhancing CO(2) activation. A high C(4+) (=) space-time yield (STY) of 474.9 mg g (cat) (-1)·h(-1) and an extremely low CO selectivity of ∼9.1% exhibited dual-high performance, significantly surpassing that in previous reports. This use of a lattice-strained catalyst offers a new strategy for the efficient conversion of CO(2) into high-value olefins, and paves the way for potential industrial applications.