Controlling Activity by Self-Assembly – Tuning Perylene Bisimide Photocatalysts for the Hydrogen Evolution Reaction

2020 ◽  
Author(s):  
Daniel McDowall ◽  
Ben Greeves ◽  
Kate McAulay ◽  
Ana Fuentes-Caparros ◽  
Lisa Thomson ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Self Assembly ◽  
Local Environment ◽  
Perylene Bisimide ◽  
Hole Scavenger ◽  
Self Assembled ◽  
Set Up ◽  
Perylene Bisimides

Amino acid functionalised perylene bisimides (PBIs) form self-assembled structures in solution, the nature of which depends on the local environment. Using a high throughput photocatalysis set-up, we have studied five PBIs for the hydrogen evolution reaction (HER) under a range of conditions (pH and hole scavenger concentration) across 350 experiments to explore the relationship between supramolecular structure and photocatalytic activity. Using small angle X-ray scattering (SAXS), we show that photocatalytic activity is determined by the nature of the self-assembled aggregate that is formed with a correlation between the presence of charged flexible cylindrical aggregates and high levels of H2. Our work highlights the complexity of designing supramolecular photocatalysts, and also the power of tuning activity by the type of aggregate that is formed.

Controlling Activity by Self-Assembly – Tuning Perylene Bisimide Photocatalysts for the Hydrogen Evolution Reaction

2020 ◽  
Author(s):  
Daniel McDowall ◽  
Ben Greeves ◽  
Kate McAulay ◽  
Ana Fuentes-Caparros ◽  
Lisa Thomson ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Self Assembly ◽  
Local Environment ◽  
Perylene Bisimide ◽  
Hole Scavenger ◽  
Self Assembled ◽  
Set Up ◽  
Perylene Bisimides

Amino acid functionalised perylene bisimides (PBIs) form self-assembled structures in solution, the nature of which depends on the local environment. Using a high throughput photocatalysis set-up, we have studied five PBIs for the hydrogen evolution reaction (HER) under a range of conditions (pH and hole scavenger concentration) across 350 experiments to explore the relationship between supramolecular structure and photocatalytic activity. Using small angle X-ray scattering (SAXS), we show that photocatalytic activity is determined by the nature of the self-assembled aggregate that is formed with a correlation between the presence of charged flexible cylindrical aggregates and high levels of H2. Our work highlights the complexity of designing supramolecular photocatalysts, and also the power of tuning activity by the type of aggregate that is formed.

scholarly journals pH dependent photocatalytic hydrogen evolution by self-assembled perylene bisimides

2017 ◽  
Vol 5 (16) ◽  
pp. 7555-7563 ◽  
Author(s):  
Michael C. Nolan ◽  
James J. Walsh ◽  
Laura L. E. Mears ◽  
Emily R. Draper ◽  
Matthew Wallace ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Self Assembly ◽  
The Self ◽  
Photocatalytic Hydrogen Evolution ◽  
Perylene Bisimide ◽  
Ph Dependent ◽  
Self Assembled ◽  
Perylene Bisimides

We show the importance of the self-assembly of a perylene bisimide on its photocatalytic activity.

scholarly journals Controlling Photocatalytic Activity by Self‐Assembly – Tuning Perylene Bisimide Photocatalysts for the Hydrogen Evolution Reaction

2020 ◽  
Vol 10 (46) ◽  
pp. 2002469
Author(s):  
Daniel McDowall ◽  
Benjamin J. Greeves ◽  
Rob Clowes ◽  
Kate McAulay ◽  
Ana M. Fuentes‐Caparrós ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Self Assembly ◽  
Perylene Bisimide

First electrochemical synthesis of mesoporous RhNi alloy films for an alkali-mediated hydrogen evolution reaction

2021 ◽  
Vol 9 (5) ◽  
pp. 2754-2763
Author(s):  
Kenya Kani ◽  
Hyunsoo Lim ◽  
Andrew E. Whitten ◽  
Kathleen Wood ◽  
Anya J. E. Yago ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrochemical Synthesis ◽  
Polymeric Micelles ◽  
Deposition Method ◽  
Alloy Films ◽  
Electrocatalytic Properties ◽  
Self Assembled

The mesoporous RhNi alloy films are synthesized by controlling the concentration of Rh precursor, applied potentials, and pH via the electrochemical co-deposition method with self-assembled polymeric micelles templates for enhancing electrocatalytic properties.

3D self-assembly of ultrafine molybdenum carbide confined in N-doped carbon nanosheets for efficient hydrogen production

Nanoscale ◽  
2017 ◽  
Vol 9 (41) ◽  
pp. 15895-15900 ◽  
Author(s):  
Haiqing Wang ◽  
Xiaobin Xu ◽  
Bing Ni ◽  
Haoyi Li ◽  
Wei Bian ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Self Assembly ◽  
Molybdenum Carbide ◽  
Carbon Nanosheets ◽  
Electrocatalytic Performance ◽  
Hierarchical Architectures

3D hierarchical architectures assembled from ultrafine MoC nanoparticles (0D) confined in N-doped conductive carbon nanosheets (2D) exhibit remarkable electrocatalytic performance and stability for the hydrogen evolution reaction (HER).

scholarly journals Insight into the Self-Assembly of Water-Soluble Perylene Bisimide Derivatives Through a Combined Computational and Experimental Approach

2019 ◽  
Author(s):  
Emily R. Draper ◽  
Liam Wilbraham ◽  
Dave J. Adams ◽  
Matthew Wallace ◽  
Martijn Zwijnenburg
Keyword(s):  
Density Functional Theory ◽  
Self Assembly ◽  
Density Functional ◽  
Colloidal Stability ◽  
Water Soluble ◽  
The Self ◽  
Functional Theory ◽  
Perylene Bisimide ◽  
Aggregate Growth ◽  
Perylene Bisimides

We use a combination of computational and experimental techniques to study the self-assembly and gelation of water-soluble perylene bisimides derivatised at the imide position with an amino acid. Specifically, we study the likely structure of self-assembled aggregates of the alanine-functionalised perylene bisimide (PBI-A) and the thermodynamics of their formation using density functional theory and predict the UV-vis spectra of such aggregates using time-dependent density functional theory. We compare these predictions to experiments in which we study the evolution of the UV-Vis and NMR spectra and rheology of alkaline PBI-A solutions when gradually decreasing the pH. Based on the combined computational and experimental results, we show that PBI-A self-assembles at all pH values but that aggregates grow in size upon protonation. Gelation is driven not by aggregate growth but reduction of the aggregation surface-charge and a decrease in the colloidal stability of the aggregation with respect to agglomeration.

Self‐assembly Mesoporous FeP Film with High Porosity for Efficient Hydrogen Evolution Reaction

ChemCatChem ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2589-2594
Author(s):  
Cong Zhang ◽  
Maosheng S. Xia ◽  
Zhipeng P. Liu ◽  
Guoqing Q. Huang ◽  
Shisheng S. Yuan ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Self Assembly ◽  
High Porosity

scholarly journals Insight into the self-assembly of water-soluble perylene bisimide derivatives through a combined computational and experimental approach

Nanoscale ◽  
2019 ◽  
Vol 11 (34) ◽  
pp. 15917-15928 ◽  
Author(s):  
Emily R. Draper ◽  
Liam Wilbraham ◽  
Dave J. Adams ◽  
Matthew Wallace ◽  
Ralf Schweins ◽  
...  
Keyword(s):  
Amino Acid ◽  
Self Assembly ◽  
Experimental Approach ◽  
Water Soluble ◽  
The Self ◽  
Experimental Techniques ◽  
Perylene Bisimide ◽  
Perylene Bisimides ◽  
Insight Into

We use a combination of computational and experimental techniques to study the self-assembly and gelation of amino-acid functionalised water-soluble perylene bisimides.

Sign in / Sign up

Export Citation Format

Share Document