Low-Ag-content Ni3N-Ni/Ag@C catalyst for the reduction of 4-nitrophenol

Ye, Siya; Yang, Huangruoyin; Iqbal, Kanwal; Wu, Yue; Lin, Tao; Hu, Haiyuan; Xu, Xin; Ye, Weichun

doi:10.1016/j.jtice.2023.104708

Cited by 4 publications

(1 citation statement)

References 41 publications

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“…For this reason, it is suggested that 4-NP concentrations in water must be kept below 10 ppb [4]. Different methods were applied for the treatment of wastewaters contaminated with this type of high-risk contaminants [5][6][7], the catalytic reduction of 4-NP to 4-aminophenol (4-AP) with NaBH 4 being the most commonly used technique [8][9][10]. It was reported that the 4-AP compound is a lesser dangerous contaminant [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

High Catalytic Activity of CoxPt100−x Alloys for Phenolic Compound Reduction

Dragos-Pinzaru,

Buema,

Racila

et al. 2024

Nanomaterials

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In this study, we report the influence of the Pt concentration in CoxPt100−x alloys on the catalytic activity of the alloys for 4-nitrophenol (4-NP) reduction. More precisely, a series of CoxPt100−x alloys with a Pt concentration ranging between 60% and 95% were prepared using electrodeposition at controlled potentials from stable hexachloroplatinate aqueous solution. The Pt concentration was tuned by varying the electrodeposition potential from −0.6 to −0.9 V. The changes in the CoxPt100−x alloy microstructure and crystalline structure have been investigated using SEM and TEM analysis. Our results show that the microstructure and the crystalline structure of the as-prepared materials do not depend on the electrodeposition potential. However, the catalytic activity of CoxPt100−x alloys is closely correlated with the potential applied during electrochemical synthesis, hence the Pt content. We demonstrated that the synthesized materials present a high catalytic activity (approx. 90%) after six cycles of reusability despite the fact that the Pt content of the as-prepared alloys decreases. The easy preparation method that guarantees more than 97% catalytic activity of the CoxPt100−x alloys, the easy recovery from solution, and the possibility of reusing the CoxPt100−x alloys are the benefits of the present study.

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