Loading...
Please wait, while we are loading the content...
Similar Documents
Behavior of the Ru-bda water oxidation catalyst covalently anchored on glassy carbon electrodes
| Content Provider | United States Department of Energy Office of Scientific and Technical Information (OSTI.GOV) |
|---|---|
| Author | Matheu, Roc Francàs, Laia Chernev, Petko Ertem, Mehmed Z. Batista, Victor Haumann, Michael Sala, Xavier Llobet, Antoni |
| Organization | Brookhaven National Laboratory (BNL), Upton, NY (United States) |
| Abstract | Electrochemical reduction of the dizaonium complex, [RuII(bda)(NO)(N–N2)2]3+, 23+ (N–N22+ is 4-(pyridin-4-yl) benzenediazonium and bda2– is [2,2'-bipyridine]-6,6'-dicarboxylate), in acetone produces the covalent grafting of this molecular complex onto glassy carbon (GC) electrodes. Multiple cycling voltammetric experiments on the GC electrode generates hybrid materials labeled as GC-4, with the corresponding Ru-aqua complex anchored on the graphite surface. GC-4 has been characterized at pH = 7.0 by electrochemical techniques and X-ray absorption spectroscopy (XAS) and has been shown to act as an active catalyst for the oxidation of water to dioxygen. This new hybrid material has a lower catalytic performance than its counterpart in homogeneous phase and progressively decomposes to form RuO2 at the electrode surface. The resulting metal oxide attached at the GC electrode surface, GC-RuO2, is a very fast and rugged heterogeneous water oxidation catalyst with TOFis of 300 s–1 and TONs >45000. The observed performance is comparable to the best electrocatalysts reported so far, at neutral pH. |
| Sponsorship | USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22) |
| Related Links | https://www.osti.gov/biblio/1221759 |
| Starting Page | 3422 |
| Ending Page | 3429 |
| Page Count | 8 |
| File Format | |
| ISSN | 21555435 |
| DOI | 10.1021/acscatal.5b00132 |
| Journal | ACS Catalysis |
| Volume Number | 5 |
| Issue Number | 6 |
| Language | English |
| Publisher | American Chemical Society |
| Publisher Date | 2015-05-07 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY water oxidation catalysis electrocatalysis water splitting Ru complexes modified graphite electrodes heterogeneous water oxidation catalysis RuO2 |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Catalysis |
