Electrocatalytic Organic Dye Pollutants Degradation with Green Hydrogen Recovery using Nanoscale NiSe Catalysts

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-05-02 DOI:10.1007/s10562-025-05025-5

Michael Walsh, Jeannie Ziang Yie Tan, Sudhagar Pitchaimuthu

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引用次数: 0

Abstract

This work investigates the potential for simultaneous water pollutant treatment and green H₂ generation through the use of a highly active catalyst material in the water electrolysis process. We synthesised nanoscale Ni₂Se₃ through a solvothermal method, analysing the crystallite structure through X-ray diffraction analysis. The electrochemical properties of as-synthesised Ni₂Se₃ nanoscale catalysts were studied by using both a freshwater and dyewater electrolyte. Interestingly, the dyewater displayed an increased electrocatalytic activity as a result of the organic pollutants oxidising. We demonstrated the feasibility of benchmarking the Ni₂Se₃ catalyst in methyl orange (model pollutant) dye pollutant degradation whilst simultaneously recovering hydrogen gas. The Ni₂Se₃-coated stainless steel anode resulted in 71.9% dye degradation over 180 min at 1.67 V vs RHE. Feasibility of hydrogen recovery during dye degradation process was examined. Interestingly, protons produced from dye degradation process at Ni₂Se₃ anode, further reduced at cathode which generated approximately 0.81 L cm⁻² of green hydrogen gas per day. This work explores an interesting investigation into the utilisation of a less expensive electrocatalyst to address the environmental clean-up and energy demand issues concurrently. Furthermore, it opens a circular economy pathway of recovering hydrogen gas from wastewater treatment.

Graphical Abstract

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纳米级NiSe催化剂电催化降解有机染料污染物及绿色氢回收

本研究通过在水电解过程中使用高活性催化剂材料，研究了同时处理水污染物和绿色H2生成的潜力。采用溶剂热法合成了纳米级Ni2Se3，并通过x射线衍射分析了晶体结构。采用淡水电解质和染料水电解质对合成的纳米Ni2Se3催化剂的电化学性能进行了研究。有趣的是，由于有机污染物氧化，染料水显示出增加的电催化活性。我们证明了Ni2Se3催化剂在甲基橙（模型污染物）染料污染物降解中同时回收氢气的可行性。在1.67 V vs RHE下，涂层ni2se3的不锈钢阳极在180 min内染料降解率达到71.9%。考察了染料降解过程中氢气回收的可行性。有趣的是，在Ni2Se3阳极染料降解过程中产生的质子在阴极进一步减少，每天产生约0.81 L cm−2的绿色氢气。这项工作探索了一项有趣的调查，利用更便宜的电催化剂同时解决环境清理和能源需求问题。此外，还开辟了一条从废水处理中回收氢气的循环经济途径。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.