Synthesis of Ag–Ni–Fe–P Multielemental Nanoparticles as Bifunctional Oxygen Reduction/Evolution Reaction Electrocatalysts
| Autor: | Yushan Yan, Zhiyuan Xu, Wei Zhu, Zhongbin Zhuang, Jinjie Fang, Xingdong Wang, Xuejiang Zhang, Xuerui Liu, Yufeng Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Materials science General Engineering Oxygen evolution General Physics and Astronomy Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Transition metal chemistry Chemical engineering Nonmetal Electrode General Materials Science 0210 nano-technology Bifunctional |
| Zdroj: | ACS Nano. 15:7131-7138 |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | Multielemental nanoparticles (MENPs) provide the possibility to integrate multiple catalytic functions from different elements into one nanoparticle. However, it is difficult to synthesize Ag-based MENPs with transition metals such as Ni and Fe because of the strong phase segregation between Ag and the other metals. Here, we show that nonmetal element P can help the amalgamation of Ag with other metals. Ag-Ni-Fe-P MENPs are successfully synthesized by a solution-phase chemistry, and they demonstrate excellent bifunctional oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) catalytic activities (the potential gap of the potential at 10 mA·cm-2 for OER and half-wave potential for ORR is 630 mV). More important, the synergistic effect from the MENPs endows them with even higher ORR or OER activity than the Ag or NiFeP nanoparticles. A rechargeable Zn-air battery is fabricated by using the Ag-Ni-Fe-P MENPs as the air electrode. The battery has an energy efficiency of ∼60% at 10 mA cm-2. Its performance is almost unchanged during a working period of 250 h, surpassing the Pt/C+IrO2-based battery. These results suggest that the rationally designed MENPs can integrate multiple catalytic functions together and achieve a synergistic effect, which can be used as high-performance multifunctional catalysts. |
| Databáze: | OpenAIRE |
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