Sulfur-Doped Graphene-Supported Nickel-Core Palladium-Shell Nanoparticles as Efficient Oxygen Reduction and Methanol Oxidation Electrocatalyst
| Autor: | Yuta Sato, Kazu Suenaga, Dimitrios K. Perivoliotis, Nikos Tagmatarchis |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Energy Engineering and Power Technology chemistry.chemical_element Nanoparticle 02 engineering and technology 010402 general chemistry Electrocatalyst 01 natural sciences law.invention symbols.namesake chemistry.chemical_compound law Materials Chemistry Electrochemistry Chemical Engineering (miscellaneous) Electrical and Electronic Engineering Graphene 021001 nanoscience & nanotechnology 0104 chemical sciences Nickel chemistry Chemical engineering symbols Methanol 0210 nano-technology Hybrid material Raman spectroscopy Palladium |
| Zdroj: | ACS Applied Energy Materials. 1:3869-3880 |
| ISSN: | 2574-0962 |
| DOI: | 10.1021/acsaem.8b00631 |
| Popis: | The design of novel platinum-free highly efficient electrocatalysts for the oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) has been regarded as the core challenge toward the development of commercially available fuel cell devices. In this contribution, a facile strategy was applied to prepare surfactant-free nickel-core palladium-shell nanoparticles, abbreviated as Pd@NiNPs, uniformly distributed on sulfur-doped graphene (SG). The Pd@NiNPs/SG hybrid material was realized by employing a modified polyol method for the in-situ preparation of NiNPs/SG, followed by deposition of a Pd shell through the galvanic replacement method and complementary characterized by Raman and IR spectroscopy, STEM/EELS, SEM and EDS as well as XRD and TGA. The Pd-to-Ni molar ratio was optimized in view of the hybrid’s electrocatalytic performance. Interestingly, the Pd@NiNPs/SG hybrid was proved to be a highly efficient and stable electrocatalyst towards ORR and MOR. It exhibited comparable initial ORR perfo... |
| Databáze: | OpenAIRE |
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