Unknown

Dataset Information

0

Dual properties of a hydrogen oxidation Ni-catalyst entrapped within a polymer promote self-defense against oxygen.

ABSTRACT: The Ni(P2N2)2 catalysts are among the most efficient non-noble-metal based molecular catalysts for H2 cycling. However, these catalysts are O2 sensitive and lack long term stability under operating conditions. Here, we show that in a redox silent polymer matrix the catalyst is dispersed into two functionally different reaction layers. Close to the electrode surface is the "active" layer where the catalyst oxidizes H2 and exchanges electrons with the electrode generating a current. At the outer film boundary, insulation of the catalyst from the electrode forms a "protection" layer in which H2 is used by the catalyst to convert O2 to H2O, thereby providing the "active" layer with a barrier against O2. This simple but efficient polymer-based electrode design solves one of the biggest limitations of these otherwise very efficient catalysts enhancing its stability for catalytic H2 oxidation as well as O2 tolerance.

SUBMITTER: Oughli AA 

PROVIDER: S-EPMC5830441 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

Json Xml
altmetric image

Publications

Dual properties of a hydrogen oxidation Ni-catalyst entrapped within a polymer promote self-defense against oxygen.

Oughli Alaa A AA   Ruff Adrian A   Boralugodage Nilusha Priyadarshani NP   Rodríguez-Maciá Patricia P   Plumeré Nicolas N   Lubitz Wolfgang W   Shaw Wendy J WJ   Schuhmann Wolfgang W   Rüdiger Olaf O  

Nature communications 20180228 1

The Ni(P<sub>2</sub>N<sub>2</sub>)<sub>2</sub> catalysts are among the most efficient non-noble-metal based molecular catalysts for H<sub>2</sub> cycling. However, these catalysts are O<sub>2</sub> sensitive and lack long term stability under operating conditions. Here, we show that in a redox silent polymer matrix the catalyst is dispersed into two functionally different reaction layers. Close to the electrode surface is the "active" layer where the catalyst oxidizes H<sub>2</sub> and exchanges  ...[more]

Similar Datasets

Unknown High-performance Platinum-free oxygen reduction reaction and hydrogen oxidation reaction catalyst in polymer electrolyte membrane fuel cell.
| S-EPMC5827662 | biostudies-literature
Unknown Noncovalent Integration of a Bioinspired Ni Catalyst to Graphene Acid for Reversible Electrocatalytic Hydrogen Oxidation.
| S-EPMC7009173 | biostudies-literature
Unknown Composite Ni/NiO-Cr2O3 Catalyst for Alkaline Hydrogen Evolution Reaction.
| S-EPMC4501498 | biostudies-literature
Unknown X-ray Crystallographic, Multifrequency Electron Paramagnetic Resonance, and Density Functional Theory Characterization of the Ni(P(Cy)2N(tBu)2)2(n+) Hydrogen Oxidation Catalyst in the Ni(I) Oxidation State.
| S-EPMC4972093 | biostudies-literature
Unknown Ni-citric acid coordination polymer as a practical catalyst for multicomponent reactions.
| S-EPMC8714820 | biostudies-literature
Unknown Facile Recoverable and Reusable Macroscopic Alumina Supported Ni-based Catalyst for Efficient Hydrogen Production.
| S-EPMC6841685 | biostudies-literature
Unknown Theory of Polymer Entrapped Enzyme Ultramicroelectrodes: Fundamentals.
| S-EPMC2863126 | biostudies-literature
Unknown Solar-Driven Hydrogen Peroxide Production Using Polymer-Supported Carbon Dots as Heterogeneous Catalyst.
| S-EPMC6199036 | biostudies-literature
Unknown Effect of the Synthetic Method on the Properties of Ni-Based Hydrogen Oxidation Catalysts.
| S-EPMC8153405 | biostudies-literature
Unknown Tuning Ni-Foam into NiOOH/FeOOH Heterostructures toward Superior Water Oxidation Catalyst via Three-Step Strategy.
| S-EPMC6645584 | biostudies-literature