Metal–Organic Framework‐Derived Fe/Co‐based Bifunctional Electrode for H 2 Production through Water and Urea Electrolysis
| Autor: | Tolendra Kshetri, G. Rajeshkhanna, Soram Bobby Singh, Joong Hee Lee, Thangjam Ibomcha Singh, Nam Hoon Kim |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Electrolysis
Prussian blue Electrolysis of water General Chemical Engineering Inorganic chemistry 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Redox 0104 chemical sciences Anode law.invention Catalysis chemistry.chemical_compound General Energy chemistry law Environmental Chemistry General Materials Science 0210 nano-technology Bifunctional |
| Zdroj: | ChemSusChem. 12:4810-4823 |
| ISSN: | 1864-564X 1864-5631 |
| DOI: | 10.1002/cssc.201902232 |
| Popis: | Hollow-structured Fex Co2-x P, Fex Co3-x O4 , and Prussian blue analogue (FeCo-PBA) microbuilding arrays on Ni foam (NF) are derived from Co-based metal-organic frameworks (Co-MOF) using a simple room temperature and post-heat-treatment route. Among them, Fex Co2-x P/NF shows excellent bifunctional catalytic activities by demonstrating very low oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) overpotentials of 255/114 mV at a current density of 20/10 mA cm-2 respectively, whereas Fex Co3-x O4 /NF and FeCo-PBA/NF demand higher overpotentials. Remarkably, for water electrolysis, Fex Co2-x P/NF requires only 1.61 V to obtain 10 mA cm-2 . In contrast to water electrolysis, urea electrolysis reduces overpotential and simultaneously purifies the urea-rich wastewater. The urea oxidation reaction at the Fex Co2-x P/NF anode needs just 1.345 V to achieve 20 mA cm-2 , which is 140 mV less than the 1.48 V potential required for OER. Moreover, the generation of H2 through urea electrolysis needs only 1.42 V to drive 10 mA cm-2 . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text