Highly Efficient Oxygen Electrode Obtained by Sequential Deposition of Transition Metal-Platinum Alloys on Graphene Nanoplatelets

Autor:	Dušan Mladenović, Elif Daş, Diogo M. F. Santos, Ayşe Bayrakçeken Yurtcan, Biljana Šljukić
Rok vydání:	2023
Předmět:	alloy nanoparticles graphene nanoplatelets oxygen reduction reaction oxygen evolution reaction bifunctional electrocatalyst General Materials Science
Zdroj:	Materials; Volume 16; Issue 9; Pages: 3388
ISSN:	1996-1944
DOI:	10.3390/ma16093388
Popis:	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−2 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87b27f36e2c9a365a1e961598afb2446 https://doi.org/10.3390/ma16093388 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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