کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6469515 | 1423974 | 2017 | 5 صفحه PDF | دانلود رایگان |
- Thin TiO2 layers were coated on Ni/C by atomic layer deposition.
- The Ni surface oxidation state of Ni/C was changed by the TiO2 coating.
- TiO2-coated Ni/C exhibited enhanced glycerol electrooxidation in alkaline medium.
- DFT showed the effect of the oxidized Ni surface on glycerol adsorption.
Thin TiO2 layers were deposited onto a carbon-supported Ni catalyst (Ni/C) through atomic layer deposition (ALD) and the resulting TiO2-coated Ni/C (ALD(TiO2)-Ni/C) was utilized for electrochemical glycerol oxidation in alkaline media. X-ray photoelectron spectroscopy analysis demonstrated that the Ni surface phase of ALD(TiO2)-Ni/C mainly consisted of Ni(OH)2 while that of uncoated Ni/C was a mixed phase of NiO and Ni(OH)2. The ALD(TiO2)-Ni/C exhibited electrocatalytic activity at least 2.4 times higher than that of Ni/C. Density functional theory calculations were used to investigate how the modified Ni surface with the TiO2 coating affects the adsorption/desorption of glycerol.
Journal: Electrochemistry Communications - Volume 83, October 2017, Pages 46-50