Platinum nanoparticle inclusion into a carbonized polymer of intrinsic microporosity

Electrochemical characteristics of a catalyst for electroless hydrogen peroxide production

Robert K. Adamik, Naiara Hernández-Ibáñez, Jesus Iniesta, Jennifer K. Edwards, Alexander G.R. Howe, Robert D. Armstrong, Stuart H. Taylor, Alberto Roldan, Yuanyang Rong, Richard Malpass-Evans, Mariolino Carta, Neil B. McKeown, Daping He, Frank Marken

Research output: Contribution to journalArticle

2 Citations (Scopus)
14 Downloads (Pure)

Abstract

The one-step vacuum carbonization synthesis of a platinum nano-catalyst embedded in a microporous heterocarbon (Pt@cPIM) is demonstrated. A nitrogen-rich polymer of an intrinsic microporosity (PIM) precursor is impregnated with PtCl6 2− to give (after vacuum carbonization at 700 °C) a nitrogen-containing heterocarbon with embedded Pt nanoparticles of typically 1–4 nm diameter (with some particles up to 20 nm diameter). The Brunauer-Emmett-Teller (BET) surface area of this hybrid material is 518 m2 g−1 (with a cumulative pore volume of 1.1 cm3 g−1) consistent with the surface area of the corresponding platinum-free heterocarbon. In electrochemical experiments, the heterocarbon-embedded nano-platinum is observed as reactive towards hydrogen oxidation, but essentially non-reactive towards bigger molecules during methanol oxidation or during oxygen reduction. Therefore, oxygen reduction under electrochemical conditions is suggested to occur mainly via a 2-electron pathway on the outer carbon shell to give H2O2. Kinetic selectivity is confirmed in exploratory catalysis experiments in the presence of H2 gas (which is oxidized on Pt) and O2 gas (which is reduced on the heterocarbon surface) to result in the direct formation of H2O2.

Original languageEnglish
Article number542
JournalNanomaterials
Volume8
Issue number7
DOIs
Publication statusPublished - 18 Jul 2018

Fingerprint

Microporosity
Platinum
Hydrogen peroxide
Hydrogen Peroxide
Polymers
Carbonization
Nanoparticles
Catalysts
Nitrogen
Gases
Vacuum
Oxygen
Oxidation
Catalyst selectivity
Hybrid materials
Catalysis
Methanol
Hydrogen
Carbon
Experiments

Keywords

  • Bifunctional catalysis
  • Heterocarbon
  • Microporosity
  • Peroxide
  • Voltammetry

ASJC Scopus subject areas

  • Materials Science(all)
  • Chemical Engineering(all)

Cite this

Platinum nanoparticle inclusion into a carbonized polymer of intrinsic microporosity : Electrochemical characteristics of a catalyst for electroless hydrogen peroxide production. / Adamik, Robert K.; Hernández-Ibáñez, Naiara; Iniesta, Jesus; Edwards, Jennifer K.; Howe, Alexander G.R.; Armstrong, Robert D.; Taylor, Stuart H.; Roldan, Alberto; Rong, Yuanyang; Malpass-Evans, Richard; Carta, Mariolino; McKeown, Neil B.; He, Daping; Marken, Frank.

In: Nanomaterials, Vol. 8, No. 7, 542, 18.07.2018.

Research output: Contribution to journalArticle

Adamik, RK, Hernández-Ibáñez, N, Iniesta, J, Edwards, JK, Howe, AGR, Armstrong, RD, Taylor, SH, Roldan, A, Rong, Y, Malpass-Evans, R, Carta, M, McKeown, NB, He, D & Marken, F 2018, 'Platinum nanoparticle inclusion into a carbonized polymer of intrinsic microporosity: Electrochemical characteristics of a catalyst for electroless hydrogen peroxide production', Nanomaterials, vol. 8, no. 7, 542. https://doi.org/10.3390/nano8070542
Adamik, Robert K. ; Hernández-Ibáñez, Naiara ; Iniesta, Jesus ; Edwards, Jennifer K. ; Howe, Alexander G.R. ; Armstrong, Robert D. ; Taylor, Stuart H. ; Roldan, Alberto ; Rong, Yuanyang ; Malpass-Evans, Richard ; Carta, Mariolino ; McKeown, Neil B. ; He, Daping ; Marken, Frank. / Platinum nanoparticle inclusion into a carbonized polymer of intrinsic microporosity : Electrochemical characteristics of a catalyst for electroless hydrogen peroxide production. In: Nanomaterials. 2018 ; Vol. 8, No. 7.
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