PdCu alloy prepared by ultrasonic method catalyzes the degradation of p-nitrophenol.

Xuan Zhou, Xuefeng Bai

Environmental science and pollution research international 2023 Apr

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PdCu alloy nanocatalysts supported on NiFe layered double hydroxide (PdCu-LDHs) were prepared by a green ultrasound-assisted reduction method. The cavitation effect of ultrasound made part of CO32- decompose to CO2, and NO3- and Cl- replace intercalation, which anchor the PdCu between layers. The action of ultrasound dissociated hydroxyl groups (-OH) on surface of LDHs to H· to reduce Cu2+ and Pd2+ to Cu0 and Pd0 and Cu promote the synergy between Pd alloy and LDHs. The electronic effects between Cu and Pd improved the catalytic performance for the reduction reaction of 4-NP and the stability of PdCu-LDHs. The PdCu-LDHs prepared at 400 W, 25 kHz, 1 h, can completely degrade p-nitrophenol (4-NP) within 5 min with n(4-NP)/n(Pd) = 50 and n(4-NP)/n(NaBH4) = 0.15. The TOF value is 988.20 h-1, which is 27.7 times that of Pd/C catalyst (commercial). © 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Citation

Xuan Zhou, Xuefeng Bai. PdCu alloy prepared by ultrasonic method catalyzes the degradation of p-nitrophenol. Environmental science and pollution research international. 2023 Apr;30(16):48449-48459