| About this Abstract |
| Meeting |
2011 TMS Annual Meeting & Exhibition
|
| Symposium
|
Surfaces and Heterostructures at Nano- or Micro-Scale and Their Characterization, Properties, and Applications
|
| Presentation Title |
High Surface Metal/Metal Nano-Microstructured Porous Monoliths |
| Author(s) |
Martin G. Bakker, Franchessa Maddox Sayler, Amy Grano, Keana Graves |
| On-Site Speaker (Planned) |
Martin G. Bakker |
| Abstract Scope |
Porous metal electrodes are of interest in a wide range of electrochemical processes. We report here on a versatile process for making a range of such electrodes using a porous silica template. The porous silica monoliths are produced by a sol-gel process with PEO polymer and cationic surfactant added to give porosity at nanometer and micrometer length scales. Metal nitrates are infiltrated into the silica monolith either as a saturated solution or as a melt. Decomposition under hydrogen results in formation of metal replicas. By controlling the number of infiltration cycles, the extent of replication can be controlled. By changing the metal salt used between infiltration cycles, heterostructures consisting of nanostructures of one metal on a continuous microstructure of a second metal can be produced. Typical surface areas are 40-90 m2/g. Significant variations in pore size distributions are found for different metals and for different methods of producing the metals. |
| Proceedings Inclusion? |
Planned: A CD-only volume |