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Platinum and Palladium Nanotubes Based on Genetically Engineered Elastin–Mimetic Fusion Protein‐Fiber Templates: Synthesis and Application in Lithium‐O 2 Batteries
Author(s) -
Guo Guilue,
Truong Thi Hong Anh,
Tan Huiteng,
Ang Huixiang,
Zhang Wenyu,
Xu Chen,
Rui Xianghong,
Hu Zhaolong,
Fong Eileen,
Yan Qingyu
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201402191
Subject(s) - template , palladium , materials science , lithium (medication) , nanotube , cathode , nanotechnology , nanoparticle , porosity , nanoscopic scale , fusion protein , chemical engineering , chemistry , catalysis , carbon nanotube , composite material , biochemistry , medicine , endocrinology , engineering , recombinant dna , gene
The coupling of proteins with self‐assembly properties and proteins that are capable of recognizing and mineralizing specific inorganic species is a promising strategy for the synthesis of nanoscale materials with controllable morphology and functionality. Herein, GPG‐AG3 protein fibers with both of these properties were constructed and served as templates for the synthesis of Pt and Pd nanotubes. The protein fibers of assembled GPG‐AG3 were more than 10 μm long and had diameters of 20–50 nm. The as‐synthesized Pt and Pd nanotubes were composed of dense layers of ∼3–5 nm Pt and Pd nanoparticles. When tested as cathodes in lithium‐O 2 batteries, the porous Pt nanotubes showed low charge potentials of 3.8 V, with round‐trip efficiencies of about 65 % at a current density of 100 mA g −1 .