One-Step Ni-Co Alloy Nanoparticles Electrodeposition from Leach Liquor of Spent Ni-MH Batteries Using a Deep Eutectic Solvent and Its Use Towards Urea Electrooxidation

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2023-09-18 DOI:10.1007/s12678-023-00842-x

A. Basilio-Brito, M. Landa-Castro, W. Sánchez-Ortiz, S. Rivera-Hernández, M. Romero-Romo, E. Arce-Estrada, J. Aldana-González, M. Palomar-Pardavé

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Abstract

This work reports a simple, low-cost, and environmentally friendly method to synthesize Ni-Co alloy nanoparticles (Ni-CoNPs) onto a glassy carbon electrode, GCE, and its use towards the efficient urea electrooxidation in basic aqueous media. Ni-CoNPs were directly electrodeposited onto the GCE surface, GCE/Ni-CoNPs by a single potentiostatic step, from the leached liquor of the cathode powder of spent Ni-MH batteries using the reline deep eutectic solvent, DES, as leaching agent, and electrolytic bath. The GCE/Ni-CoNPs were immersed in a 1 M KOH, 0.33 M urea aqueous solution and used as anode for urea electrochemical oxidation. The mass activity of this electrode depicted a maximum value of 27,900 mAmg⁻¹ cm⁻² at ca 0.5 V vs. Ag/AgCl and a steady state mass activity of 1690 mAmg⁻¹ cm⁻² during the potentiodynamic and potentiostatic evaluation. The performance of the GCE/Ni-CoNPs electrode reported in this work is similar or better than other electrodes reported for this purpose using more sophisticated, time-consuming, and costly methods.

Graphical Abstract

Abstract Image

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废镍氢电池浸出液一步电沉积镍钴合金纳米颗粒及其在尿素电氧化中的应用

本文报道了一种简单、低成本、环保的方法，在玻碳电极GCE上合成镍钴合金纳米颗粒(Ni-CoNPs)，并将其用于碱性水介质中高效的尿素电氧化。从废镍氢电池阴极粉末的浸出液中，采用直线深共晶溶剂DES作为浸出剂，通过电解浴，通过一次恒电位步骤直接将Ni-CoNPs电沉积在GCE表面，GCE/Ni-CoNPs。将GCE/Ni-CoNPs浸入1 M KOH, 0.33 M尿素水溶液中，作为尿素电化学氧化的阳极。在动电位和恒电位评估期间，该电极的质量活性在ca 0.5 V vs. Ag/AgCl下的最大值为27,900 mAmg−1 cm−2，稳态质量活性为1690 mAmg−1 cm−2。在这项工作中报道的GCE/Ni-CoNPs电极的性能与使用更复杂，耗时和昂贵的方法报道的其他电极相似或更好。图形抽象

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

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