Preprints
https://doi.org/10.5194/mr-2021-5
https://doi.org/10.5194/mr-2021-5

  19 Jan 2021

19 Jan 2021

Review status: this preprint is currently under review for the journal MR.

Pd-based bimetallic catalysts for HET-PHIP

Dudari B. Burueva1,2, Aleksandr Y. Stakheev3, and Igor V. Koptyug1,2 Dudari B. Burueva et al.
  • 1Laboratory of Magnetic Resonance Microimaging, International Tomography Center, SB RAS, Novosibirsk, 630090, Russia
  • 2Novosibirsk State University, Novosibirsk, 630090, Russia
  • 3N.D. Zelinsky Institute of Organic Chemistry, RAS, Moscow, 119991, Russia

Abstract. Production of hyperpolarized catalyst-free gases and liquids by heterogeneous hydrogenation with parahydrogen (HET-PHIP) can be useful for various technical as well as biomedical applications, including in vivo studies, investigations of mechanisms of industrially important catalytic processes, enrichment of nuclear spin isomers of polyatomic gases, and more. In this regard, the wide systematic search for heterogeneous catalysts effective in pairwise H2 addition required for the observation of PHIP effects is crucial. Here in this work we demonstrate the competitive advantage of Pd-based bimetallic catalysts for HET-PHIP. The dilution of catalytically active Pd with less active Ag or In atoms provides the formation of atomically dispersed Pd1 sites on the surface of Pd-based bimetallic catalysts, which are significantly more selective toward pairwise H2 addition compared to the monometallic Pd. Furthermore, the choice of the dilution metal (Ag or In) has a pronounced effect on the efficiency of bimetallic catalysts in HET-PHIP, as revealed by comparing Pd-Ag and Pd-In bimetallic catalysts.

Dudari B. Burueva et al.

Status: open (until 02 Mar 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on mr-2021-5', Anonymous Referee #1, 01 Feb 2021 reply
    • AC1: 'Reply on RC1', Igor Koptyug, 18 Feb 2021 reply
      • RC2: 'Reply on AC1', Anonymous Referee #1, 18 Feb 2021 reply
  • RC3: 'Comment on mr-2021-5', Anonymous Referee #2, 23 Feb 2021 reply

Dudari B. Burueva et al.

Data sets

Pd-based bimetallic catalysts in hydrogenation with parahydrogen Burueva, D. B., Stakheev, A. Y., and Koptyug, I. V. https://doi.org/10.5281/zenodo.4436159

Dudari B. Burueva et al.

Viewed

Total article views: 186 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
136 39 11 186 2 2
  • HTML: 136
  • PDF: 39
  • XML: 11
  • Total: 186
  • BibTeX: 2
  • EndNote: 2
Views and downloads (calculated since 19 Jan 2021)
Cumulative views and downloads (calculated since 19 Jan 2021)

Viewed (geographical distribution)

Total article views: 164 (including HTML, PDF, and XML) Thereof 163 with geography defined and 1 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 26 Feb 2021
Download
Short summary
Catalytic hydrogenation of unsaturated molecular precursors with parahydrogen provides a major signal enhancement in NMR, which is vital for many technical as well as biomedical applications. We show that dilution of catalytically active Pd with a less active metal in heterogeneous Pd-based catalysts provides significantly larger enhancements, and that the judicious choice of the dilution metal can further improve the performance, as revealed by comparing Pd-Ag and Pd-In bimetallic catalysts.