期刊
ELECTROCHIMICA ACTA
卷 260, 期 -, 页码 47-54出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.11.054
关键词
Stabilizer-free synthesis; Bimetallic catalyst; Porous nanofinger; Methanol electro-oxidation; Graphene
资金
- National Natural Science Foundation of China [21675032]
Labor-saving preparation of highly active electrocatalysts for electrochemical energy conversion is extremely critical to the development of portable electronic devices. In this work, a hybrid catalyst of porous bimetallic PdCu nanofinger supported on graphene was simply synthesized by a one-step stabilizer-free method. The described method, carried out under room temperature without complicated procedures, not only abandoned the electrochemically hindered organic stabilizers during the synthesis, but also made the as-prepared catalyst with bimetallic composition strongly couple to graphene nanosheets. Meanwhile, it also provided the catalyst with large surface area and hierarchical pore structures via the spatially interconnected finger-like nanoparticles. As a result, the catalyst exhibited a synergistically enhanced electrocatalytic activity (2025.6 mA/mgPd) and stability for methanol electro-oxidation reaction, which was superior to the commercial Pd/C catalyst and the other reported Pd-based catalysts. In addition, the electrocatalytic performances could be easily adjusted by regulating the catalyst composition via this facile synthesis. These findings suggested a straightforward method to prepare the practical electrocatalysts with low cost and high activity for the fuel cell technologies. (C) 2017 Elsevier Ltd. All rights reserved.
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