期刊
RSC ADVANCES
卷 5, 期 49, 页码 38995-39002出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra03564c
关键词
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资金
- National Natural Science Foundation of China [51301147, 51372213, 61176007]
- Research Grants Council of the Hong Kong Special Administrative Region of China (GRF) [11209914]
- City University of Hong Kong [7200339, 9680108]
In this work, a novel nanoporous gold/silver oxide (NP Au/AgO) composite (NPAAC) was fabricated by a simple two-step partial dealloying-stripping process. Microstructural and electrochemical characterizations suggested that the NPAAC has a bicontinuous, interpenetrating nanoporous structure with ultrafine ligament-channel sizes down to similar to 10 nm, and it delivered a rectangle cyclic voltammetry (CV) curve with a wide electrochemical double-layer region from -0.3 to 0.7 V (vs. Ag/AgCl in sulfuric acid) and a specific capacitance of similar to 80 F g(-1). Moreover, the NPAAC revealed a superior cyclic performance as compared to metal-based pseudocapacitors, with stable charge-discharge cycling at similar to 77 F g(-1) for more than ten thousand times with no detectable degradation. This work demonstrates that the new systems of nanoporous noble metal/metal-oxide composites could be similarly fabricated by this approach and developed as potential double-layer capacitors with comparable cyclic performance to carbon-based supercapacitors.
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