Electrochemical properties of a new electrode material, Ti4O7

Pollock, Ryan; Houlihan, J.F.; Bain, A.; Coryea, B.S.

doi:10.1016/0025-5408(84)90005-9

Cited by 37 publications

(17 citation statements)

References 24 publications

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“…HClO ↔ ClO -+ H + (5) Ceramic electrode based on sub-stoichiometric TiO 2 developed in 80′s for application as electrodes in batteries, sensors and corrosion protection has recently been investigated as an alternative low-cost anode material for possible application in electrochemical wastewater treatment [16][17][18][19][20][21][22]. The structural, electrical, electrochemical as well as corrosion behavior of bare and coated electrodes made from these material are available in literature [16,[23][24][25]. They are majorly prepared by reduction of stoichiometric TiO 2 , which is one of the most abundant feedstock on the planet [18,26].…”

Section: + H 2 O → M( • Oh) + H + + E -mentioning

confidence: 99%

Efficiency of plasma elaborated sub-stoichiometric titanium oxide (Ti4O7) ceramic electrode for advanced electrochemical degradation of paracetamol in different electrolyte media

Ganiyu

Oturan

Raffy

et al. 2019

Separation and Purification Technology

113

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This paper investigates the behavior of conductive Ti 4 O 7 ceramic anode in different electrolytes during the degradation of the anti-inflammatory drug paracetamol (PCM) by advanced electrochemical oxidation processes mainly anodic oxidation with generation of H 2 O 2 (AO-H 2 O 2) and electro-Fenton (EF). Regardless of the medium, better degradation and mineralization efficiency was always observed with EF compared to AO-H 2 O 2. The degradation of PCM was carried out by hydroxyl radical (% OH) produced on the anode surface from water oxidation and mediated oxidation in the solution from oxidant species generated at the anode such as sulfate radicals and active chlorine species depending on the supporting electrolytes used, as well as % OH generated homogeneously in the solution by electrochemically assisted Fenton's reaction. Faster degradation was observed in Cl − compared to other media, but the solution was poorly mineralized. Highest total organic (TOC) removal efficiency with excellent degradation rate was attained in SO 4 2− with either process, thus remain the best medium for advanced electrochemical wastewater treatment. Comparative studies with dimensional stable anode (DSA) and boron-doped diamond anode (BDD) showed similar trend of degradation and TOC removal efficiency with DSA anode achieving low mineralization power compared to Ti 4 O 7 anode, whereas BDD showed slightly better efficiency than Ti 4 O 7 in all electrolytes studied. The analysis of concentration of generated active chlorine species, especially ClO − , during AO-H 2 O 2 decreased in the order: DSA > Ti 4 O 7 > BDD. Therefore, the Ti 4 O 7 electrode was found to be a promising anode material for an efficient treatment of PCM in SO 4 2− , NO 3 − and ClO 4 − media but less effective in Cl − medium.

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Section: + H 2 O → M( • Oh) + H + + E -mentioning

confidence: 99%

Efficiency of plasma elaborated sub-stoichiometric titanium oxide (Ti4O7) ceramic electrode for advanced electrochemical degradation of paracetamol in different electrolyte media

Ganiyu

Oturan

Raffy

et al. 2019

Separation and Purification Technology

113

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“…6 To improve the durability of a cathode catalyst, more oxidationresistant catalyst supports are strongly desired. [7][8][9][10][11][22][23][24][25] To date, we have synthesized Ti 4 O 7supported Pt (Pt/Ti 4 O 7 ) catalyst, and found that Pt/Ti 4 O 7 catalysts show a specific activity for the oxygen reduction reaction (ORR) that is almost equal to those of commercial Pt/C catalysts, and also show much better oxidation resistance under high potential conditions. Among them, oxygen-deficient, sub-stoichiometric titanium oxide (Ti n O 2n-1 , 4 < n < 10), which is known as Magnéli phase, is both a corrosion-resistant and electrically conductive material.…”

mentioning

confidence: 99%

Corrosion-Resistant PEMFC Cathode Catalysts Based on a Magnéli-Phase Titanium Oxide Support Synthesized by Pulsed UV Laser Irradiation

Ioroi¹,

Akita²,

Yamazaki³

et al. 2011

J. Electrochem. Soc.

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Nano-sized sub-stoichiometric titanium oxide (TiOx), synthesized by pulsed UV laser irradiation of TiO 2 , was used as a catalyst support material for a PEMFC cathode, and its catalytic activity for the oxygen reduction reaction (ORR) and stability against high potentials >1.0 V were examined by comparison to a conventional Pt/C catalyst. The catalyst structure and composition were determined by XRD, TEM and EDX, and the results showed that Pt particles deposited on a TiOx support are alloyed with titanium to form an ordered Pt 3 Ti phase. The catalytic activity for ORR was evaluated using the rotating disk electrode (RDE) technique in 0.1M HClO 4 at 25 C, and the results showed that Ti-alloyed Pt/TiOx catalysts exhibited 2-fold higher specific activity than conventional Pt/XC72. This enhanced activity of Pt/TiOx catalysts is believed to be due to the formation of Pt-Ti alloy. Catalyst stability at high potentials was examined by potential cycling between 1.0 and 1.5 V vs RHE in 0.1M HClO 4 at 60 C. While Pt/TiOx catalysts retained their initial electrochemical active area (ECA) after 10000 voltage cycles, Pt/XC72 lost 30-50% of its initial ECA after 10 000 cycles, which indicates that Pt/TiOx catalysts are highly stable under high potential conditions.

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“…This combined process was recently realized through the development of a substoichiometric TiO 2 REM, which was applied to organic compound oxidation [23,24]. Substoichiometric TiO 2 is an ideal material for REM development, due to its long-term stability under both anodic and cathodic polarization [25,26], chemical inertness [27], and its high reactivity towards both inorganic [28] and organic [23,24] contaminants in wastewater streams. Substoichiometric TiO 2 , known as Magnéli phases, has a general formula of Ti n O 2n-1 (3 ≤ n ≤ 20).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical impedance spectroscopy study of membrane fouling and electrochemical regeneration at a sub-stoichiometric TiO2 reactive electrochemical membrane

Yin

Guo

Chaplin

2016

Journal of Membrane Science

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In this study, a novel substoichiometric TiO 2 ultrafiltration reactive electrochemical membrane (REM) was synthesized and used for electrochemical regeneration of membranes fouled by humic acid (HA) and polystyrene beads (PS). A non-invasive and non-destructive electrochemical impedance spectroscopy (EIS) characterization technique was used to spatially characterize fouling at the REM and data were successfully interpreted by a transmission line model. Based on these analyses, a chemical free electrochemical regeneration (CFER) scheme in backwash mode was developed. The CFER in anodic treatment mode recovered the flux of a HA fouled REM from 3.0% to between 76% and 99% of the initial flux over 5 continuous fouling/regeneration cycles. Full flux recovery of a PS fouled REM (fouling 31% to 38%) was achieved when using either cathodic or anodic CFER. By contrast, regeneration without an applied potential showed only partial flux recovery of 66% and 62% on HA fouled and PS fouled membranes, respectively. The operating cost of CFER was $0.04 m-2 to $0.06 m-2 per regeneration cycle, which is only 1.3% the cost of NaOH cleaning. Results suggest that the REM can provide an efficient and cost effective regeneration scheme that allows it to function in a diverse set of water treatment applications.

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Electrochemical properties of a new electrode material, Ti4O7

Cited by 37 publications

References 24 publications

Efficiency of plasma elaborated sub-stoichiometric titanium oxide (Ti4O7) ceramic electrode for advanced electrochemical degradation of paracetamol in different electrolyte media

Efficiency of plasma elaborated sub-stoichiometric titanium oxide (Ti4O7) ceramic electrode for advanced electrochemical degradation of paracetamol in different electrolyte media

Corrosion-Resistant PEMFC Cathode Catalysts Based on a Magnéli-Phase Titanium Oxide Support Synthesized by Pulsed UV Laser Irradiation

Electrochemical impedance spectroscopy study of membrane fouling and electrochemical regeneration at a sub-stoichiometric TiO2 reactive electrochemical membrane

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