Enhanced catalytic performance and changed reaction chemistry for electrochemical glycerol oxidation by atomic-layer-deposited Pt-nanoparticle catalysts
| Autor: | Yuseong Noh, Jisu Han, Jeong Rang Kim, David H. K. Jackson, Hyunju Chang, Hyun Woo Kim, Hyung Ju Kim, Kwan Young Lee, Won Bae Kim, Jechan Lee, Youngmin Kim |
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| Rok vydání: | 2020 |
| Předmět: |
Glyceric acid
Process Chemistry and Technology Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Platinum nanoparticles 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Atomic layer deposition chemistry Chemical engineering Titanium dioxide Cyclic voltammetry 0210 nano-technology General Environmental Science |
| Zdroj: | Applied Catalysis B: Environmental. 273:119037 |
| ISSN: | 0926-3373 |
| DOI: | 10.1016/j.apcatb.2020.119037 |
| Popis: | Atomically controlled thin TiO2 layers were coated onto a carbon-supported Pt nanoparticle (Pt/C) surface using an atomic layer deposition (ALD) technique. Then, the resulting TiO2 coated Pt/C (ALD(TiO2)-Pt/C) was heat-treated at 150 °C under N2 atmosphere. The heat-treated ALD(TiO2)-Pt/C (ALD(TiO2)-Pt/C(150 H T)) catalyst demonstrated improved electrocatalytic glycerol oxidation reaction (GOR) activity with a turnover frequency (TOF) 3-times higher than for uncoated Pt/C catalyst. Interestingly, the ALD(TiO2)-Pt/C(150 H T) catalyst maintained its catalytic GOR performance after a cyclic voltammetry (CV) stability test of 1200 cycles, preventing Pt sintering due to strong Pt-TiO2 interaction. The reaction chemistry for GOR on the ALD(TiO2)-Pt/C(150 H T) catalyst also changed due to the newly created Pt-TiO2 interfaces, producing more oxidized chemicals such as glyceric acid and glycolic acid. The enhanced GOR performance is related to the formation of new Pt-O-Ti bonds and to change in the physicochemical properties of the Pt by interaction between the Pt nanoparticles and ALD-coated TiO2. |
| Databáze: | OpenAIRE |
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