New Development of Anodic Electro-catalyst for Chlor-alkali Industry

Zafar, Muhammad Sohail; Tausif, Muhammad; Zia-ul-Haq,; Ashrafq, Muhammad; Hussain, Shahid

doi:10.4152/pea.201604257

Cited by 7 publications

(5 citation statements)

References 14 publications

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“…RuO 2 is used mainly for the production of chlorine as a part of mixed metal oxides (MMOs). The bare oxide electrodes have been demonstrated to reach long service lifetimes [56]. However, they suffer corrosion due to the harsh reaction conditions of chlorine and oxygen evolution to which the electrode is exposed in industrial chlor-alkali processes, among others.…”

Section: Ruthenium-based Catalystsmentioning

confidence: 99%

Recent Progress in Catalysts for Hydrogen-Chlorine Regenerative Fuel Cells

et al. 2020

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The increasing energy demand and the subsequent climate change consequences are supporting the search for sustainable alternatives to fossil fuels. In this scenario, the link between hydrogen and renewable energy is playing a key role and unitized hydrogen-chlorine (H2-Cl2) regenerative cells (RFCs) have become promising candidates for renewable energy storage. Described herein are the recent advances in cell configurations and catalysts for the different reactions that may take place in these systems, that work in both modes: electrolysis and fuel cell. It has been found that platinum (Pt)-based catalysts are the best choice for the electrode where hydrogen is involved, whereas for the case of chlorine, ruthenium (Ru)-based catalysts are the best candidates. Only a few studies were found where the catalysts had been tested in both modes and recent advances are focused on decreasing the amount of precious metals contained in the catalysts. Moreover, the durability of the catalysts tested under realistic conditions has not been thoroughly assessed, becoming a key and mandatory step to evaluate the commercial viability of the H2-Cl2 RFC technology.

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Section: Ruthenium-based Catalystsmentioning

confidence: 99%

Recent Progress in Catalysts for Hydrogen-Chlorine Regenerative Fuel Cells

et al. 2020

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“…The coating may be composed of one or more active metal oxides [27,28,29]. Due to the excellent performance of DSA electrodes, they have been extensively used in water electrolysis [30,31], the chlor-alkali industry [32,33], organic synthesis [34], and sewage treatment [35,36].…”

Section: Introductionmentioning

confidence: 99%

Study on Electrochemical Degradation of Nicosulfuron by IrO2-Based DSA Electrodes: Performance, Kinetics, and Degradation Mechanism

Zhao

Zhang

Chen³

et al. 2019

IJERPH

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The widely used sulfonylurea herbicides have caused negative effects on the environment and human beings. Electrochemical degradation has attracted much attention in the treatment of refractory organic compounds due to its advantage of producing no secondary pollution. Three kinds of IrO2-based dimensionally stable anodes (DSAs) were used to degrade nicosulfuron by a batch electrochemical process. The results showed that a well-distributed crack network was formed on the Ti/Ta2O5-IrO2 electrode and Ti/Ta2O5-SnO2-IrO2 electrode due to the different coefficients of thermal expansion between the Ti substrate and oxide coatings. The oxygen evolution potential (OEP) increased according to the order of Ti/RuO2-IrO2 < Ti/Ta2O5-SnO2-IrO2 < Ti/Ta2O5-IrO2. Among the three electrodes, the Ti/Ta2O5-IrO2 electrode showed the highest efficiency and was chosen as the experimental electrode. Single factor experiments were carried out to obtain the optimum electrolysis condition, shown as follows: currency intensity 0.8 A; electrode spacing 3 cm, electrolyte pH 3. Under the optimum conditions, the degradation of nicosulfuron followed first-order kinetics and was mainly due to indirect electrochemical oxidation. It was a typical diffusion-controlled electrochemical process. On the basis of the intermediate identified by high performance liquid chromatograph-mass spectrometry (HPLC-MS), two possible degradation routes were proposed.

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“… 28 RuO 2 NPs are popular due to their redox properties and conductance. 29 The strong bioactivity of Ru attracts scientists to employ it in biological systems. 30 The physicochemical properties of Ru and RuO 2 NPs are well established, but their green synthesis, bioactivity and catalysis are at an early stage.…”

Section: Synthetic Strategy and Applicationsmentioning

confidence: 99%