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Carbon-Supported Trimetallic Catalysts (PdAuNi/C) for Borohydride Oxidation Reaction
| Content Provider | MDPI |
|---|---|
| Author | Gordana, Backović Biljana, Šljukić ElSheikh, Ahmed Oliveira, Raisa Sequeira, César McGregor, James Santos, Diogo |
| Copyright Year | 2021 |
| Description | The synthesis of palladium-based trimetallic catalysts via a facile and scalable synthesis procedure was shown to yield highly promising materials for borohydride-based fuel cells, which are attractive for use in compact environments. This, thereby, provides a route to more environmentally friendly energy storage and generation systems. Carbon-supported trimetallic catalysts were herein prepared by three different routes: using a $NaBH_{4}$-ethylene glycol complex $(PdAuNi/C_{SBEG}$), a $NaBH_{4}$-2-propanol complex $(PdAuNi/C_{SBIPA}$), and a three-step route $(PdAuNi/C_{3-step}$). Notably, $PdAuNi/C_{SBIPA}$ yielded highly dispersed trimetallic alloy particles, as determined by XRD, EDX, ICP-OES, XPS, and TEM. The activity of the catalysts for borohydride oxidation reaction was assessed by cyclic voltammetry and RDE-based procedures, with results referenced to a Pd/C catalyst. A number of exchanged electrons close to eight was obtained for $PdAuNi/C_{3-step}$ and $PdAuNi/C_{SBIPA}$ (7.4 and 7.1, respectively), while the others, $PdAuNi/C_{SBEG}$ and $Pd/C_{SBIPA}$, presented lower values, 2.8 and 1.2, respectively. A direct borohydride-peroxide fuel cell employing $PdAuNi/C_{SBIPA}$ catalyst in the anode attained a power density of 47.5 mW $cm^{−2}$ at room temperature, while the elevation of temperature to 75 °C led to an approximately four-fold increase in power density to 175 mW $cm^{−2}$. Trimetallic catalysts prepared via this synthesis route have significant potential for future development. |
| Starting Page | 1441 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano11061441 |
| Journal | Nanomaterials |
| Issue Number | 6 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-05-29 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Electrochemistry Palladium Trimetallic Catalysts Nanoparticle Borohydride Oxidation Direct Borohydride Peroxide Fuel Cell Kinetic Parameters |
| Content Type | Text |
| Resource Type | Article |
