In situ growth of nanostructures on substrates is a strategy for designing highly efficient catalytic materials. Herein, multimetallic CuCoNi oxide nanowires are synthesized in situ on a three-dimensional nickel foam (NF) substrate (CuCoNi–NF) by a hydrothermal method and applied to peroxydisulfate (PDS) activation as immobilized catalysts. The catalytic performance of CuCoNi–NF is evaluated through the degradation of organic pollutants such as bisphenol A (BPA) and practical wastewater. The results indicate that the NF not only plays an important role as the substrate support but also serves as an internal Ni source for material fabrication. CuCoNi–NF exhibits high activity and stability during PDS activation as it mediates electron transfer from BPA to PDS. CuCoNi–NF first donates electrons to PDS to arrive at an oxidized state and subsequently deprives electrons from BPA to return to the initial state. CuCoNi–NF maintains high catalytic activity in the pH range of 5.2–9.2, adapts to a high ionic strength up to 100 mM, and resists background HCO₃^– and humic acid. Meanwhile, 76.6% of the total organic carbon can be removed from packaging wastewater by CuCoNi–NF-catalyzed PDS activation. This immobilized catalyst shows promising potential in wastewater treatment, well addressing the separation and recovery of conventional powdered catalysts.

中文翻译：

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镍泡沫基底上原位生长的多金属CuCoNi氧化物纳米线通过介导电子转移催化过硫酸盐活化

在基底上原位生长纳米结构是设计高效催化材料的一种策略。在此，多金属CuCoNi氧化物纳米线通过水热法在三维镍泡沫（NF）基底（CuCoNi-NF）上原位合成，并作为固定化催化剂应用于过二硫酸盐（PDS）活化。通过降解双酚 A (BPA) 和实际废水等有机污染物来评估 CuCoNi-NF 的催化性能。结果表明，NF不仅作为基板支撑起重要作用，而且作为材料制造的内部Ni源。CuCoNi-NF 在 PDS 活化过程中表现出高活性和稳定性，因为它介导了从 BPA 到 PDS 的电子转移。CuCoNi-NF 首先向 PDS 提供电子以达到氧化状态，然后从 BPA 中剥夺电子以返回初始状态。CuCoNi-NF 在 5.2-9.2 的 pH 范围内保持高催化活性，适应高达 100 mM 的高离子强度，并能抵抗背景 HCO₃ ^–和腐殖酸。同时，CuCoNi-NF催化的PDS活化可以去除包装废水中76.6%的总有机碳。这种固定化催化剂在废水处理中显示出巨大的潜力，很好地解决了传统粉末催化剂的分离和回收问题。