Au–Pt bimetallic nanoparticles supported on nest-like MnO2: synthesis and application in HCHO decomposition

• Published in: Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology Vol. 14; no. 11; p. 1
• Main Authors: Yu, Xuehua, He, Junhui, Wang, Donghui, Hu, Yucai, Tian, Hua, Dong, Tongxin, He, Zhicheng
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.11.2012; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Decomposition; Formaldehyde; Inorganic Chemistry; Lasers; Materials Science; Metals; Nanoparticles; Nanotechnology; Optical Devices; Optics; Photonics; Physical Chemistry; Research Paper; Spectroscopy; Synergistic effect; X-ray diffraction; Au–Pt bimetallic NPs; Au; Pt; Catalytic performance; Formaldehyde; MnO
• ISSN: 1388-0764; 1572-896X
• DOI: 10.1007/s11051-012-1260-3

Facile synthesis of Au–Pt bimetallic nanoparticles (Au 1− x Pt x NPs) and mixtures of Au NPs and Pt NPs ((100 % −  y )Au/ y Pt NPs) and their subsequent deposition on nest-like MnO 2 nanostructures were presented. The as-prepared products were characterized by means of UV–visible spectroscopy, X-ray diffraction, scanning and transmission electron microscopy, and energy dispersive spectroscopy. TEM analyses showed that noble metal NPs were evenly dispersed on the surface of nest-like MnO 2 nanostructures and no agglomeration was observed. The as-prepared metal NPs supported catalysts showed higher catalytic activities than MnO 2 nanostructures for oxidative decomposition of formaldehyde (HCHO). The forms of noble metal NPs and Au/Pt molar ratio have significant effects on the catalytic performance, and Au 0.5 Pt 0.5 /MnO 2 has the highest catalytic activity among all the as-prepared metal NPs supported MnO 2 catalysts, and the temperature for complete decomposition of HCHO reached as low as 313 K. The high catalytic activities of Au 1− x Pt x /MnO 2 catalysts resulted from the synergistic effect between Au 1− x Pt x NPs and MnO 2 nanostructure, as well as the synergistic effect between Au and Pt. The current Au 1− x Pt x /MnO 2 catalysts are among the first trials to apply bimetallic NP-supported catalysts to the decomposition of HCHO, and proved that the Au 1− x Pt x /MnO 2 catalysts are promising for indoor decomposition of formaldehyde due to their easy synthesis, low cost, and excellent catalytic performance.