AI Article Synopsis
- A new composite of platinum and common transition metals was created on graphene nanoplatelets to study the relationship between synthesis methods and their electrochemical properties.
- The materials were tested as bifunctional electrocatalysts for oxygen evolution and reduction, vital for applications in fuel cells and batteries.
- Among the materials, sqPtFe/GNPs demonstrated the best performance in catalysis, while a unique two-stage synthesis approach enhanced effectiveness by improving reactant accessibility and minimizing charge transfer resistance.
Article Abstract
A set of platinum (Pt) and earth-abundant transition metals (M = Ni, Fe, Cu) on graphene nanoplatelets (sqPtM/GNPs) was synthesised via sequential deposition to establish parallels between the synthesis method and the materials' electrochemical properties. sqPtM/GNPs were assessed as bifunctional electrocatalysts for oxygen evolution (OER) and reduction (ORR) reactions for application in unitised regenerative fuel cells and metal-air batteries. sqPtFe/GNPs showed the highest catalytic performance with a low potential difference of ORR half-wave potential and overpotential at 10 mA cm during OER, a crucial parameter for bifunctional electrocatalysts benchmarking. A novel two-stage synthesis strategy led to higher electrocatalytic performance by facilitating the reactants' access to the active sites and reducing the charge-transfer resistance.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10179827 | PMC |
| http://dx.doi.org/10.3390/ma16093388 | DOI Listing |
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