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Observation of Dinitrogen Adsorption by Rhodium Oxide Clusters.

Ziheng Zhang1,2, Hua Xie2, Gang Li2

  • 1Marine Engineering College, Dalian Maritime University, Dalian 116026, China.

Inorganic Chemistry
|May 15, 2026
PubMed
Summary
This summary is machine-generated.

Nitrogen fixation is challenging. Rhodium oxide clusters activate dinitrogen (N2) via end-on bonding, facilitated by charge transfer and π back-donation, crucial for initial activation stages.

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Catalysis

Background:

  • Nitrogen fixation is essential for industrial and biological processes.
  • Activating the stable triple bond in dinitrogen (N2) requires transition metal interaction.
  • Understanding N2 adsorption on metal sites is key to developing efficient catalysts.

Purpose of the Study:

  • Investigate the structural and bonding properties of Rh2O2(N2)n- (n = 1-2) complexes.
  • Elucidate the mechanism of dinitrogen adsorption and activation on rhodium oxide clusters.
  • Determine the role of electronic interactions in N2 activation.

Main Methods:

  • Mass-selected photoelectron velocity-map imaging spectroscopy.
  • Quantum chemical calculations.
  • Computational modeling of molecular complexes.

Main Results:

  • Experimental and theoretical data confirm end-on bonding motifs for N2 in Rh2O2(N2)n- (n = 1-2).
  • Charge transfer from Rh and O to N2 facilitates adsorption and activation.
  • π back-donation from Rh 4d orbitals to N2 antibonding orbitals is critical for dinitrogen activation.

Conclusions:

  • Rh2O2(N2)n- (n = 1-2) complexes exhibit key adsorbed species in early dinitrogen activation.
  • The findings provide insights into the mechanism of N2 activation by rhodium oxide clusters.
  • This study advances the understanding of nitrogen fixation chemistry.