Details

Autor(en) / Beteiligte

• Zhang, Zewu
• Zhang, Jinghui
• Liu, Guangqing
• Xue, Mengwei
• Wang, Zhangzhong
• Bu, Xiaohai
• Wu, Qiong
• Zhao, Xuejuan

Titel

Selective deposition of Au-Pt alloy nanoparticles on ellipsoidal zirconium titanium oxides for reduction of 4-nitrophenol

Ist Teil von

• Korean Journal of Chemical Engineering, 2017, 34(9), 210, pp.2471-2479

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Au-Pt alloy nanoparticles that are selectively anchored on TiO 2 surface of the ellipsoidal zirconium titanium composite oxides were successfully prepared by a facile two-step method: prefabricated binary composite oxides on the ellipsoidal Fe 2 O 3 @SiO 2 by a versatile cooperative template-directed coating method, and then in situ formation of Au-Pt alloy NPs with Sn 2+ as the reduction agent. The alloy catalysts were characterized by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. The result suggested that highly dispersive and ultrafine Au-Pt alloy nanoparticles were deposited onto TiO 2 surface of the binary oxides solely. The particle size of nanoalloys was closely related to the ratio of Zr: Ti in the composite oxides shell. Increasing the content of Zr element led to a growth in the size of alloy nanoparticles. When used as catalysts for the reduction of 4-nitrophenol, the prepared supported alloyed catalysts exhibited high catalytic activity, and the sample could be easily recycled without a significant decrease of the catalytic activity.