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Highly Efficient AuPd/Carbon Nanotube Nanocatalysts for the Electro‐Fenton Process
Author(s) -
Sun Meng,
Zhang Gong,
Liu Yang,
Liu Huijuan,
Qu Jiuhui,
Li Jinghong
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201406676
Subject(s) - nanomaterial based catalyst , bimetallic strip , catalysis , carbon nanotube , x ray photoelectron spectroscopy , materials science , chemical engineering , transmission electron microscopy , nanotechnology , degradation (telecommunications) , environmental remediation , nanoparticle , chemistry , contamination , organic chemistry , engineering , telecommunications , ecology , computer science , biology
Development of novel nanocatalysts for the highly efficient in situ synthesis of H 2 O 2 from H 2 and O 2 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 H 2 O 2 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 k 1 =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.