title: Highly Efficient AuPd/Carbon Nanotube Nanocatalysts for the Electro-Fenton Process.
abstract: Development of novel nanocatalysts for the highly efficient in situ synthesis of H2 O2 from H2 and O2 in the electro-Fenton (EF) process has potential for the remediation of water pollution. In this work, AuPd/carbon nanotube (CNT) nanocatalysts were successfully synthesized by the facile aggregation of AuPd bimetals on CNTs. Characterization by X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy indicated that pure AuPd bimetallic heterogeneous nanospheres (≈20 nm) were well dispersed outside the CNTs, which resulted in better catalytic performance than Pd/CNTs alone: 0.36 M H2 O2 was synthesized; 0.05 M Fe(2+) optimally initiated the EF process due to the superior in situ Fe(2+) regeneration; and the organic pollutant removal reached 100 % at 37 min, with a pseudo-first-order kinetic constant k1 =0.051 min(-1) . Moreover, structural insights before/after catalysis revealed that Au strengthened the construction of the nanocrystals, avoided negative deactivation caused by AuPd agglomeration, and immobilized the active Pd(111). The catalytic stability of AuPd/CNTs over ten cycles implied long durability and promising applications of this material.
authors.affiliation: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 (China), Fax: (+86) 10-6292355; University of Chinese Academy of Sciences, Beijing 100039 (China).
authors.forename: Meng
authors.initials: M
authors.lastname: Sun
authors.forename: Gong
authors.initials: G
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Huijuan
authors.initials: H
authors.lastname: Liu
authors.forename: Jiuhui
authors.initials: J
authors.lastname: Qu
authors.forename: Jinghong
authors.initials: J
authors.lastname: Li
keywords: electro-Fenton process; gold; nanotubes; palladium; supported catalysts