Catalytic activity of platinum/tungsten oxide nanorod electrodes towards electro-oxidation of methanol

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

“…The materials used for solid-state voltammetry should contain not only reactive redox species, through which fast reversible electron transfer is possible, but also fairly large amounts of mobile counter cations to keep the electroneutrality. Such materials can have potential application as charge storage in batteries and supercapacitors [3], electrochromic devices [4], corrosion protection [5,6], medicine [7], and fuel cell research [7][8][9][10][11][12][13][14][15]. The important physicochemical parameters, such as porosity, degree and type of solvation, effective diffusion coefficient of charge propagation, concentration of redox species, should be taken into account during evaluation and selection of solid electrolytes.…”

“…Boron is an electron-deficient element, which can form either trigonal or tetrahedral coordinations. Structure analysis of the α-[BW 12 O 40 ] 5− Keggin anion reveals a central, regular {BO4} unit, in agreement with 11B solid-state NMR data [42][43][44]. According to our previous work [25,26,45], application of electroanalytical approaches allow us to determine both the concentration (C 0 ) of redox centers and the apparent diffusion coefficient (D app ) for a single crystal of silicotungstic, phosphotungstic acids, or Prussian Blue in a sol-gel matrix, by solving a system of two equations with two unknowns (D app and C 0 ).…”

“…The results that we obtained for borotungstic acid allow us to tell more about the mechanism of charge propagation. 12 ) was synthesized according to the reference [48] and characterized by FTIR, powder X-ray diffraction and TGA. A single crystal of borotungstic acid (BW 12 ) was prepared as follows: a known amount of BW 12 (3 g) was dissolved in 5 ml of water in a beaker to obtain a highly concentrated solution.…”

“…A single crystal of borotungstic acid (BW 12 ) was prepared as follows: a known amount of BW 12 (3 g) was dissolved in 5 ml of water in a beaker to obtain a highly concentrated solution. Next, the clear, concentrated solution of BW 12 was put aside for a week at room temperature in a closed beaker to allow slow crystallization. The crystallization process for each single crystal of BW 12 was repeated three times.…”

Electrochemical Detection of Catechol on Boron‐doped Diamond Electrode Modified with Au/TiO2 Nanorod Composite

“…[12][13][14][15][16] Moreover, due to their structure-, sizedependent properties, the materials with various shapes have distinct effects on electrode modification. [17][18][19] The metal/TiO 2 composites with different nano-structure have been reported to construct electrochemical sensors due to their superior properties such as high active electrode surface area, good biocompatibility, high electrocatalytic activity, long-term chemical stability and interface-dominated properties. [20][21][22][23] In the present work, Au/TiO 2 nanorod composites have been prepared by chemically reducing negatively charged AuCl 4 -on the positively charged TiO 2 nanorods surface.…”