Hilal DEMİR KIVRAK

Article | 2022 | Journal of Electronic Materials52 ( Special Issue: 2 )

Here, Ga@PdAgCo catalysts were prepared by sequential reduction using carbon nanotubes (CNT) as support material. The catalysts at different weight percentages were characterized by inductively coupled plasma-mass spectrometry (ICP-MS), transmission electron microscopy (TEM), x-ray photoelectron spectroscopy (XPS), and x-ray diffraction (XRD) analytical techniques. Chronoamperometry (CA), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) measurements were applied to examine the glucose electrooxidation performance of the catalysts. Among the catalysts, the 7 Ga@PdAgCo(CNT) multi-metallic catalyst provided the . . . best mass activity and specific activity of 231.08 mA/mg Pd and 2.475 mA/cm(2), respectively. EIS results revealed that the 7 Ga@PdAgCo(CNT) catalyst has a faster electron transfer rate with low (632 omega) charge transfer resistance (Rct). Consequently, the 7 Ga@PdAgCo(CNT) catalyst stands out as a potential anode catalyst for direct glucose fuel cells More less

Nahit AKTAŞ | Ali Osman SOLAK

Article | 2021 | Journal of Electronic Materials50 ( 4 )

In the present work, TiO2 nanotubes (TNT) and carbon-doped TiO2 nanotubes (C-TNT) were produced via the anodization method. Carbon doping was performed on TNT in a tubular oven employing two different 15 cm3/min total flow rates with varying compositions of acetylene (C2H2) and argon (Ar) as VC2H2/Ar = 7/93 (1 cm3/min C2H2   14 cm3/min Ar) for C-TNT (7:93) and VC2H2/Ar = 33/67 (5 cm3/min C2H2   10 cm3/min Ar) for C-TNT (33:67). The synthesized C-doped TNT was characterized by x-ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM). XRD, Raman spectra, and SEM results reveal that a carbon film structure wa . . .s formed on the TNT surface. In addition, the electronic structure of TNT changed with doping of carbon on the TNT surface. These carbon-doped TNTs were employed as catalysts for the photocatalytic oxidation of glucose (GA). Cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) measurements were carried out to investigate the glucose electro-oxidation activity of the carbon-doped TNTs in the dark and under UV illumination (λ = 354 nm). C-TNT (7:93) exhibited the highest glucose electro-oxidation activity under the dark and UV illumination compared to C-TNT (33:67) and TNT. The glucose electro-oxidation (GAEO) current density on C-TNT (7:93) improved significantly under UV illumination compared to glucose electro-oxidation activity obtained in the dark. C-TNT (7:93) enhanced glucose electro-oxidation activity and stability under UV illumination. This electrode production method is promising for the design of photocatalytic glucose fuel cells More less