Affiliation:
1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
2. School of Applied Chemistry and Engineering University of Science and Technology of China Hefei 230026 China
3. Department of Chemistry Tsinghua University Beijing 100084 China
Abstract
AbstractThe variability of CO2 hydrogenation reaction demands new potential strategies to regulate the fine structure of the catalysts for optimizing the reaction pathways. Herein, we report a dual‐site strategy to boost the catalytic efficiency of CO2‐to‐methanol conversion. A new descriptor, τ, was initially established for screening the promising candidates with low‐temperature activation capability of CO2, and sequentially a high‐performance catalyst was fabricated centred with oxophilic Mo single atoms, who was further decorated with Pt nanoparticles. In CO2 hydrogenation, the obtained dual‐site catalysts possess a remarkably‐improved methanol generation rate (0.27 mmol gcat.−1 h−1). For comparison, the singe‐site Mo and Pt‐based catalysts can only produce ethanol and formate acid at a relatively low reaction rate (0.11 mmol gcat.−1 h−1 for ethanol and 0.034 mmol gcat.−1 h−1 for formate acid), respectively. Mechanism studies indicate that the introduction of Pt species could create an active hydrogen‐rich environment, leading to the alterations of the adsorption configuration and conversion pathways of the *OCH2 intermediates on Mo sites. As a result, the catalytic selectivity was successfully switched.
Funder
National Natural Science Foundation of China