Loading...
Please wait, while we are loading the content...
Similar Documents
Insights on the Electrocatalytic Seawater Splitting at Heterogeneous Nickel-Cobalt Based Electrocatalysts Engineered from Oxidative Aniline Polymerization and Calcination
| Content Provider | MDPI |
|---|---|
| Author | Hajjar, Perla Lacour, Marie-Agnès Masquelez, Nathalie Cambedouzou, Julien Tingry, Sophie Cornu, David Holade, Yaovi |
| Copyright Year | 2021 |
| Description | Given the limited access to freshwater compared to seawater, a growing interest surrounds the direct seawater electrolysis to produce hydrogen. However, we currently lack efficient electrocatalysts to selectively perform the oxygen evolution reaction (OER) over the oxidation of the chloride ions that are the main components of seawater. In this contribution, we report an engineering strategy to synthesize heterogeneous electrocatalysts by the simultaneous formation of separate chalcogenides of nickel $(NiS_{x}$, x = 0, 2/3, 8/9, and 4/3) and cobalt $(CoS_{x}$, x = 0 and 8/9) onto a carbon-nitrogen-sulfur nanostructured network. Specifically, the oxidative aniline polymerization in the presence of metallic cations was combined with the calcination to regulate the separate formation of various self-supported phases in order to target the multifunctional applicability as both hydrogen evolution reaction (HER) and OER in a simulated alkaline seawater. The OER’s metric current densities of 10 and 100 mA $cm^{−2}$ were achieved at the bimetallic for only 1.60 and 1.63 $V_{RHE}$, respectively. This high-performance was maintained in the electrolysis with a starting voltage of 1.6 V and satisfactory stability at 100 mA over 17 h. Our findings validate a high selectivity for OER of ~100%, which outperforms the previously reported data of 87–95%. |
| Starting Page | 5926 |
| e-ISSN | 14203049 |
| DOI | 10.3390/molecules26195926 |
| Journal | Molecules |
| Issue Number | 19 |
| Volume Number | 26 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-09-30 |
| Access Restriction | Open |
| Subject Keyword | Molecules Polyaniline Electrocatalysis Hydrogen Evolution Reaction Oxygen Evolution Reaction Seawater Splitting |
| Content Type | Text |
| Resource Type | Article |
