Issue 49, 2015

Facile fabrication of a novel nanoporous Au/AgO composite for electrochemical double-layer capacitor

Abstract

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 ∼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 ∼80 F g−1. Moreover, the NPAAC revealed a superior cyclic performance as compared to metal-based pseudocapacitors, with stable charge–discharge cycling at ∼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.

Graphical abstract: Facile fabrication of a novel nanoporous Au/AgO composite for electrochemical double-layer capacitor

Supplementary files

Article information

Article type
Paper
Submitted
27 Feb 2015
Accepted
15 Apr 2015
First published
15 Apr 2015

RSC Adv., 2015,5, 38995-39002

Facile fabrication of a novel nanoporous Au/AgO composite for electrochemical double-layer capacitor

J. Xu, C. Wang, J. Liu, S. Xu, W. Zhang and Y. Lu, RSC Adv., 2015, 5, 38995 DOI: 10.1039/C5RA03564C

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