Room-Temperature CO2 Hydrogenation to Methanol over Air-Stable hcp-PdMo Intermetallic Catalyst

Hironobu Sugiyama; Masayoshi Miyazaki; Masato Sasase; Masaaki Kitano; Hideo Hosono

doi:10.1021/jacs.2c13801

Room-Temperature CO₂ Hydrogenation to Methanol over Air-Stable hcp-PdMo Intermetallic Catalyst

J Am Chem Soc. 2023 May 3;145(17):9410-9416. doi: 10.1021/jacs.2c13801. Epub 2023 Mar 30.

Authors

Hironobu Sugiyama¹, Masayoshi Miyazaki¹, Masato Sasase¹, Masaaki Kitano^{1

2}, Hideo Hosono^{1

3}

Affiliations

¹ MDX Research Center for Element Strategy, International Research Frontiers Initiative, Tokyo Institute of Technology, Yokohama 226-8503, Japan.
² Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan.
³ International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan.

Abstract

CO₂ hydrogenation to methanol is one of the most promising routes to CO₂ utilization. However, difficulty in CO₂ activation at low temperature, catalyst stability, catalyst preparation, and product separation are obstacles to the realization of a practical hydrogenation process under mild conditions. Here, we report a PdMo intermetallic catalyst for low-temperature CO₂ hydrogenation. This catalyst can be synthesized by the facile ammonolysis of an oxide precursor and exhibits excellent stability in air and the reaction atmosphere and significantly enhances the catalytic activity for CO₂ hydrogenation to methanol and CO compared with a Pd catalyst. A turnover frequency of 0.15 h^-1 was achieved for methanol synthesis at 0.9 MPa and 25 °C, which is comparable to or higher than that of the state-of-the-art heterogeneous catalysts under higher-pressure conditions (4-5 MPa).