Monodisperse copper nanoparticles on porphyrin-derived Fe-N-doped carbon for hydrogen generation from ammonia borane

Mojtaba Mahyari, Jaber Nasrollah Gavgani, Amirhossein Hasani, Jang Kyo Kim, Soo Young Kim

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Ultrafine copper nanoparticles (Cu NPs) on iron-nitrogen doped carbon (Fe-N-C) were prepared via an electrochemically facial route. Porphyrins were pyrolyzed in the presence of iron-oxalate and sulfur to obtain Fe-N-C. Incorporation of the CN- ligands serves as basis which assist the coordination and concentration of Cu ions on the Fe-N-C surface. Then, electrochemical reduction of Cu(II) to Cu(0) was accomplished to give Cu NPs. The ultrafine Cu NPs (2 nm in diameter) are promisingly dispersed on the surface of Fe-N-C due to their interaction with CN-groups. The catalytic activity of Fe-N-C, and Cu NPs were compared with Cu/Fe-N-C for the hydrolysis reaction of ammonia borane (AB, NH3BH3) under ambient atmosphere pressure at room temperature. The activation energy of Cu/Fe-N-C for the hydrolysis of AB was obtained 33±1 kJ mol-1 which is lower than other Cu-based catalysts reported previously. Moreover, the recycle tests exhibit that the Cu/Fe-N- C retains almost 85% of its initial catalytic activity even after fifth catalytic reuse. The high performance and low synthetic cost of Cu/Fe-N-C may make it possible to be used as promising hydrogen storage materials for AB.

Original languageBritish English
Pages (from-to)1572-1577
Number of pages6
JournalScience of Advanced Materials
Volume9
Issue number9
DOIs
StatePublished - 1 Sep 2017

Keywords

  • Catalytic hydrolysis
  • Iron-nitrogen doped carbon
  • Reusability
  • Ultrafine copper nanoparticles

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