Back to Search
Start Over
Electrochemically synthesized freestanding 3D nanoporous silver electrode with high electrocatalytic activity
- Source :
- Catalysis Science & Technology. 6:7163-7171
- Publication Year :
- 2016
- Publisher :
- Royal Society of Chemistry (RSC), 2016.
-
Abstract
- Three-dimensional nanoporous metals of highly porous structure and interconnected ligaments are attractive for electrochemical reactions. Herein, freestanding 3D nanoporous silver (np-Ag) is prepared by a facile electrochemical approach, i.e., first electro-oxidizing silver to silver halides followed by electro-reduction of the silver halides by controlling the potential applied to the electrode. The np-Ag displays 130 and 11.5 times enhancement in catalytic activity for the oxygen reduction reaction and the formaldehyde electro-oxidation reaction, respectively, relative to the flat polycrystalline silver, and even outperforms the commercial nano-Pt catalyst. Detailed experimental and theoretical studies discover that both the facilitated mass transportation in the 3D interconnected porous structures and the favored kinetics contribute to the superior electro-catalytic activity of np-Ag.
Details
- ISSN :
- 20444761 and 20444753
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- Catalysis Science & Technology
- Accession number :
- edsair.doi...........738b8089c14335abb2e9b60f6f133837