Preparation of new titanium oxy nitride based electro catalysts using an anhydrous sol-gel method for water electrolysis in acid medium

Wang, Wanli; Savadogo, O.; Ma, Zi‐Feng

doi:10.1016/j.ijhydene.2012.02.025

Cited by 23 publications

(32 citation statements)

References 78 publications

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“…This is understandable, since anodes are prone to oxidation in general, and titanium is prone to oxidation in particular [20]. A similar finding has been made by Wang et al, who observed that the higher the concentration of nitride in their oxynitride coating, the higher its tendency to be irreversibly oxidised under anodic conditions [22].…”

Section: Xps (X-ray Photoelectron Spectroscopy)supporting

confidence: 59%

Enhanced Lifetime Cathode for Alkaline Electrolysis Using Standard Commercial Titanium Nitride Coatings

2019

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The use of hydrogen gas as a means of decoupling supply from demand is crucial for the transition to carbon-neutral energy sources and a greener, more distributed energy landscape. This work shows how simple commercially available titanium nitride coatings can be used to extend the lifetime of 316 grade stainless-steel electrodes for use as the cathode in an alkaline electrolysis cell. The material was subjected to accelerated ageing, with the specific aim of assessing the coating's suitability for use with intermittent renewable energy sources. Over 2000 cycles lasting 5.5 days, an electrolytic cell featuring the coating outperformed a control cell by 250 mV, and a reduction of overpotential at the cathode of 400 mV was observed. This work also confirms that the coating is solely suitable for cathodic use and presents an analysis of the surface changes that occur if it is used anodically.

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Section: Xps (X-ray Photoelectron Spectroscopy)supporting

confidence: 59%

Enhanced Lifetime Cathode for Alkaline Electrolysis Using Standard Commercial Titanium Nitride Coatings

2019

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“…Furthermore, there are some peaks at 26.3°, 40.5°, 53°, and 54.5°that they do not belong to neither pure titanium nitride nor pure titanium oxide. These peaks are considered as the characteristic diffractions of a certain composition of TiO x N y which are in good agreement with those obtained elsewhere [63]. However, we are not still sure about the nature of them and their crystalline structure.…”

Section: Resultssupporting

confidence: 90%

“…Titanium oxy-nitride is usually synthesized by different methods, such as reactive sputtering [52,53], chemical vapor deposition (CVD) [54], the solvo-thermal method [55], the hydrothermal method [56], nitridizing titanium oxide under ammonia gas [57], oxidizing titanium nitride [58], and the sol-gel method [59][60][61][62][63][64][65][66]. Sol-gel method, among other methods, is more widespread and convenient to produce transition metal oxy-nitrides.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and physicochemical properties of titanium Oxy-nitride electrocatalyst prepared by sol-gel methods for the oxygen reduction reaction purposes

Seifitokaldani

Oishi

Perrier

et al. 2015

J Solid State Electrochem

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In the present article, titanium oxy-nitride (TiON), as a potential electrocatalyst for the oxygen reduction reaction (ORR), is fabricated by four different sol-gel methods. Physicochemical properties (structure, chemical composition, BET surface area, surface morphology, chemical stability, and electrochemical stability) are determined. The ORR in acid medium on these TiON electrocatalysts is evaluated and compared to the ORR on commercial Pt/C. This evaluation is based on the onset potential, charge density, Tafel slope, exchange current density, and mass activity. Chemical and electrochemical stability of TiON electrocatalysts are compared to those of platinum electrocatalyst. It is shown that the preparation method affects the electrocatalytic activity and stability. The stability of the TiON electrocatalysts is correlated to their chemical composition and BET surface area. In addition, the effect of the heat treatment condition on the chemical composition, surface area, and performance of the electrocatalysts are investigated. The best TiON electrocatalyst with a high content of nitrogen exhibited the onset potential of 0.75 V vs. NHE, which is quite promising for a non-noble electrocatalyst for the ORR in acid medium.

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“…[168] In case of TiONs, the presence of oxide phase aids in rapid surface redox reactions. [169][170][171][172] In the context of TiONs, This result is akin to the other TiN structures reported such as nanofibers (145 F g À 1 @2 mV s À 1 ) [173] and nanowires (123 F g À 1 @10 mV s À 1 ). By varying the O/N ratio, the properties of the oxynitride can be modified.…”

Section: Titanium Oxynitride (Tion)supporting

confidence: 67%

“…By varying the O/N ratio, the properties of the oxynitride can be modified. [169][170][171][172] In the context of TiONs, This result is akin to the other TiN structures reported such as nanofibers (145 F g À 1 @2 mV s À 1 ) [173] and nanowires (123 F g À 1 @10 mV s À 1 ). [46] The performance of TiO x N y nanosheets attributes to porous morphology and divalent cations in nanosheets.…”

Section: Titanium Oxynitride (Tion)supporting

confidence: 67%

Metal Oxynitrides as Promising Electrode Materials for Supercapacitor Applications

2019

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In the past decade, due to the demands of the electrochemical energy storage sector, there has been a quest for novel supercapacitor materials that offer champion storage characteristics. Metal oxynitrides are seen as potential candidates for electrochemical energy storage owing to their high cyclability (up to 10 5 cycles), good intrinsic conductivity (30000-35000 S cm À 1 ), good wettability, corrosion resistance, and chemical inertness. In this review, the use of metal oxynitrides as electrode materials for supercapacitors is discussed. A comparison of oxynitrides with other electrode materials, such as metal oxides, carbon-based materials, and their composites, is made. This study also places emphasis on the impact of synthesis techniques on the final properties of the material. In view of this critical analysis, we envisage future directions for this category of energy storage materials.[a] U.

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Preparation of new titanium oxy nitride based electro catalysts using an anhydrous sol-gel method for water electrolysis in acid medium

Cited by 23 publications

References 78 publications

Enhanced Lifetime Cathode for Alkaline Electrolysis Using Standard Commercial Titanium Nitride Coatings

Enhanced Lifetime Cathode for Alkaline Electrolysis Using Standard Commercial Titanium Nitride Coatings

Electrochemical and physicochemical properties of titanium Oxy-nitride electrocatalyst prepared by sol-gel methods for the oxygen reduction reaction purposes

Metal Oxynitrides as Promising Electrode Materials for Supercapacitor Applications

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