Palladium nanoparticles embedded in microporous carbon as electrocatalysts for water splitting in alkaline media
| Autor: | Denys S. Butenko, Nickolai I. Klyui, P. I. Kolkovsky, I. V. Zatovsky, Shilin Li, V. M. Boychuk, Volodymyr Kotsyubynsky, V.I. Dubinko, N.A. Liedienov, Wei Han |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Electrolysis of water Renewable Energy Sustainability and the Environment Carbonation Energy Engineering and Power Technology Nanoparticle chemistry.chemical_element 02 engineering and technology Microporous material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrocatalyst 01 natural sciences 0104 chemical sciences law.invention Fuel Technology chemistry Chemical engineering law Water splitting Calcination 0210 nano-technology Carbon |
| Zdroj: | International Journal of Hydrogen Energy. 46:21462-21474 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2021.03.242 |
| Popis: | The creation of carbon matrices with a high surface area for effective catalytic activity is an urgent task today, especially in the field of electrocatalysis. In this study, microporous carbon (MPS) with a surface area of about 1300 m2 g−1 was produced from raw plant waste (apricot pit shells) by successive thermal carbonation and chemical treatment. The MPS was impregnated with H2PdCl6 and calcined at various temperatures under a H2–Ar flux. The obtained Pd-NP@MPC (nanoparticle size from 1 to 25 nm) catalysts were characterized in detail by XRD, SEM, TEM and BET methods. Electrochemical tests show that the prepared composites exhibit high electrocatalytic activity and remarkable stability over time (over 50 h) for the HER process and overall water splitting performance. The electrodes have very low overpotentials (η) of 95–117 mV for HER in 1 M KOH at a current density of 100 mA cm−2. Furthermore, the Pd-NP@MPC-300 electrode can reach a high current density of 300 mA cm−2 at η merely of 170 mV and shows excellent electrocatalytic stability in prolonged water electrolysis. The relationships between MPC matrix characteristics, Pd NPs size and electrocatalytic properties are discussed in this paper. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect