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Abstract
Direct ethanol fuel cells (DEFC) still lack active and efficient electrocatalysts for the alkaline ethanol oxidation reaction (EOR). In this work, a new instant reduction synthesis method was developed to prepare carbon supported ternary PdNiBi nanocatalysts with improved EOR activity. Synthesized catalysts were characterized with a variety of structural and compositional analysis techniques in order to correlate their morphology and surface chemistry with electrochemical performance. The modified instant reduction synthesis results in well-dispersed, spherical Pd 85Ni 10Bi 5 nanoparticles on Vulcan XC72R support (Pd 85Ni 10Bi 5/C (II-III)), with sizes ranging from 3.7 ± 0.8 to 4.7 ± 0.7 nm. On the other hand, the common instant reduction synthesis method leads to significantly agglomerated nanoparticles (Pd 85Ni 10Bi 5/C (I)). EOR activity and stability of these three different carbon supported PdNiBi anode catalysts with a nominal atomic ratio of 85:10:5 were probed via cyclic voltammetry and chronoamperometry using the rotating disk electrode method. Pd 85Ni 10Bi 5/C (II) showed the highest electrocatalytic activity (150 mA⋅cm −2; 2678 mA⋅mg −1) with low onset potential (0.207 V) for EOR in alkaline medium, as compared to a commercial Pd/C and to the other synthesized ternary nanocatalysts Pd 85Ni 10Bi 5/C (I) and Pd 85Ni 10Bi 5/C (III). This new synthesis approach provides a new avenue to developing efficient, carbon supported ternary nanocatalysts for future energy conversion devices. [Figure not available: see fulltext.].
Original language | English |
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Pages (from-to) | 203-214 |
Number of pages | 12 |
Journal | Electrocatalysis |
Volume | 11 |
Issue number | 2 |
Early online date | 3 Jan 2020 |
DOIs | |
Publication status | Published - 1 Mar 2020 |
Keywords
- Alkaline direct ethanol fuel cell
- Ethanol oxidation reaction activity
- Modified instant reduction synthesis method
- Morphology
- Pd Ni Bi nanocatalyst
- Structure
ASJC Scopus subject areas
- Electrochemistry
Fields of Expertise
- Mobility & Production
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Dive into the research topics of 'Alkaline Ethanol Oxidation Reaction on Carbon Supported Ternary PdNiBi Nanocatalyst using Modified Instant Reduction Synthesis Method'. Together they form a unique fingerprint.Projects
- 1 Finished
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FWF – GODEFC - Graphene oxide based MEAs for the direct ethanol fuel cell
Hacker, V. (Co-Investigator (CoI)), Wolf, S. (Co-Investigator (CoI)), Roschger, M. (Co-Investigator (CoI)) & Samsudin, A. M. (Co-Investigator (CoI))
1/01/19 → 30/06/22
Project: Research project