Methanol Tolerant Oxygen Reduction Reaction Electrocatalysis using Size?Specific Triphenylphosphine?Ligated Gold Nanoclusters
نویسندگان
چکیده
The development of a stable and efficient Oxygen Reduction Reaction (ORR) electrocatalysts with high methanol tolerance is crucial for Direct Methanol Fuel Cells (DMFCs). Herein, triphenylphosphine (PPh3)-ligated gold nanoclusters complexes (AuNCs), Au101(PPh3)21Cl5, Au9(PPh3)8(NO3)3, Au1(PPh3)Cl supported on reduced graphene oxide (rGO) have been explored as tolerant ORR electrocatalysts. Electrocatalytic performance each AuNCs-rGO was determined through linear sweep voltammograms (LSV) cyclic voltammetry (CV) compared Pt/C. Size-dependent activity observed which followed the size trend Au101NC-rGO>Au9NC-rGO>Au1NC-rGO. Repeated LSV chronoamperometry measurements revealed that long-term stability over 24 hours Au101NC-rGO>Au9NC-rGO?Au1NC-rGO all were more than also evaluated via CV. Size-independent no noticeable change in presence methanol. nanocomposites are promising cathode DMFCs.
منابع مشابه
Oxygen reduction catalyzed by gold nanoclusters supported on carbon nanosheets.
Nanocomposites based on p-mercaptobenzoic acid-functionalized gold nanoclusters, Au102(p-MBA)44, and porous carbon nanosheets have been fabricated and employed as highly efficient electrocatalysts for oxygen reduction reaction (ORR). Au102(p-MBA)44 clusters were synthesized via a wet chemical approach, and loaded onto carbon nanosheets. Pyrolysis at elevated temperatures led to effective remova...
متن کاملMethanol Tolerance of Pd–Co Oxygen Reduction Reaction Electrocatalysts Using Scanning Electrochemical Microscopy
Bimetallic Pd–Co and pure Pt electrocatalysts were evaluated for tolerance to methanol in the oxygen reduction reaction ORR in 0.5 M H2SO4 using the tip generation–substrate collection mode of scanning electrochemical microscopy. The Pd–Co electrocatalyst, Pd80Co20 80% Pd, 20% Co , showed the highest ORR activity among the different Pd–Co compositions, both in the absence and presence of MeOH. ...
متن کاملHeavily Graphitic-Nitrogen Self-doped High-porosity Carbon for the Electrocatalysis of Oxygen Reduction Reaction
Large-scale production of active and stable porous carbon catalysts for oxygen reduction reaction (ORR) from protein-rich biomass became a hot topic in fuel cell technology. Here, we report a facile strategy for synthesis of nitrogen-doped porous nanocarbons by means of a simple two-step pyrolysis process combined with the activation of zinc chloride and acid-treatment process, in which kidney ...
متن کاملHybrid Nanomaterials Based on Graphene and Gold Nanoclusters for Efficient Electrocatalytic Reduction of Oxygen
Nanocomposites based on gold nanoclusters (AuNCs) with polyvinyl pyrrolidone as ligand and reduced graphene oxide (RGO) have been prepared and employed as efficient electrocatalysts for oxygen reduction reaction (ORR). AuNCs were synthesized through a wet chemical approach and then loaded onto the RGO. The as-prepared hybrid materials were pyrolyzed to remove the organic ligands. The composites...
متن کاملPhosphate-Tolerant Oxygen Reduction Catalysts
Increased oxygen reduction reaction (ORR) kinetics, improved CO tolerance, and more efficient water and heat management represent significant advantages that high-temperature polymer electrolyte fuel cells (HT-PEFCs) operating with a phosphoric acid-doped polybenzimidazole (PBI) membrane offer over traditional Nafion-based, low-temperature PEFCs. However, before such HT-PEFCs become viable, the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: ChemNanoMat
سال: 2022
ISSN: ['2199-692X']
DOI: https://doi.org/10.1002/cnma.202200122