Importance of Electrode Tailoring in the Coupling of Electrolysis with Renewable Energy,ChemElectroChem

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Importance of Electrode Tailoring in the Coupling of Electrolysis with Renewable Energy
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-06-16 , DOI: 10.1002/celc.202000550
Violeta M. García‐Orozco ₁ , Maria Millán ₂ , Justo Lobato ₂ , Carmen M. Fernández‐Marchante ₂ , Gabriela Roa‐Morales ₁ , Ivonne Linares‐Hernández ₃ , Reyna Natividad ₁ , Manuel A. Rodrigo ₂

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In this work, it has been evaluated how the performance of an electrolyzer, used to treat a clopyralid waste and directly powered without regulation by a battery, is influenced by the electrodes resistance. Electrolyzers were equipped with electrodes consisting of the same boron‐doped diamond (BDD) coating deposited on different substrate (Si, Ta and Nb). The results expose great differences despite using the same coating. Faster removal rates were attained with Ta‐ and Nb‐BDD electrodes. The amount of energy required to attain the same removal efficiency showed great differences. Up to 1.95 mg/Wh of pesticide were removed when using Si, compared to 2.14 mg/Wh removed with Ta. Furthermore, the quantity and strength of the generated oxidants were also quite different. 86.78 mmol of oxidants were needed to remove a gram of pesticide with Ta‐BDD and 30.57 mmol with Si‐BDD. Therefore, the electrode resistance is an important aspect that must be considered in order to get a suitable design of energy storage systems that allow the green photovoltaic powering of electrochemical technologies using conventional batteries as a booster to ensure a continuous operation.

中文翻译：

电极定制在电解与可再生能源耦合中的重要性

在这项工作中，已经评估了电解槽的性能如何受到电极电阻的影响，该电解槽用于处理吡虫啉废物，无需电池即可直接供电。电解槽配备的电极由沉积在不同基材（Si，Ta和Nb）上的相同的掺硼金刚石（BDD）涂层组成。尽管使用相同的涂层，结果仍显示出很大的差异。Ta和Nb-BDD电极的去除速度更快。达到相同去除效率所需的能量差异很大。使用Si时，去除的农药高达1.95 mg / Wh，而使用Ta去除的农药为2.14 mg / Wh。此外，产生的氧化剂的数量和强度也有很大不同。86。用Ta-BDD除去1克农药和用Si-BDD除去30.57 mmol的农药需要78 mmol的氧化剂。因此，为了获得合适的储能系统设计，必须考虑电极电阻的重要方面，该储能系统允许使用常规电池作为助推器的电化学技术的绿色光伏发电，以确保连续运行。

更新日期：2020-07-14

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