Scientific Reports (Jun 2023)

Ag2(0) dimers within a thioether-functionalized MOF catalyze the CO2 to CH4 hydrogenation reaction

  • Yongkun Zheng,
  • Nuria Martín,
  • Mercedes Boronat,
  • Jesús Ferrando-Soria,
  • Marta Mon,
  • Donatella Armentano,
  • Emilio Pardo,
  • Antonio Leyva-Pérez

DOI
https://doi.org/10.1038/s41598-023-37600-4
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 7

Abstract

Read online

Abstract Ultrasmall silver clusters in reduced state are difficult to synthesize since silver atoms tend to rapidly aggregate into bigger entities. Here, we show that dimers of reduced silver (Ag2) are formed within the framework of a metal–organic framework provided with thioether arms in their walls (methioMOF), after reduction with NaBH4 of the corresponding Ag+-methioMOF precursor. The resulting Ag2-methioMOF catalyzes the methanation reaction of carbon dioxide (CO2 to CH4 hydrogenation reaction) under mild reaction conditions (1 atm CO2, 4 atm H2, 140 °C), with production rates much higher than Ag on alumina and even comparable to the state-of-the-art Ru on alumina catalyst (Ru–Al2O3) under these reaction conditions, according to literature results.