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A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
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A Systematic Comparative Study of Hydrogen-Evolving Molecular Catalysts in Aqueous Solutions
Souvik Roy1, Marine Bacchi1, Gustav Berggren1,2
1Laboratory of Chemistry and Biology of Metals, Université Grenoble Alpes, CNRS, CEA, 17 rue des Martyrs, 38000, Grenoble, France.
Chemsuschem
|September 19, 2015
Summary
A new screening method efficiently compares H2-forming catalysts using a microsensor. Cobalt catalysts showed remarkable versatility, producing hydrogen under various conditions, especially thermal.
Area of Science:
- Catalysis
- Electrochemistry
- Photochemistry
Background:
- Developing efficient hydrogen (H2)-forming catalysts is crucial for sustainable energy.
- Existing methods for catalyst evaluation can be time-consuming or limited in scope.
Purpose of the Study:
- To introduce a systematic, reliable, and fast screening method for H2-forming catalysts in aqueous solutions.
- To compare the performance of various metal catalysts (Co, Ni, Fe, Pt) under different conditions.
Main Methods:
- Utilized a Clark-type microsensor for precise H2 detection.
- Evaluated catalysts under thermal conditions with chemical reductants (Eu(II)) and photochemical conditions using photosensitizers ({[Ru(bipy)3]Cl2}, eosin-Y) and sacrificial electron donors (ascorbate, triethanolamine).
Main Results:
- Identified specific conditions under which most catalysts were active.
- Demonstrated the broad applicability of cobalt catalysts across different reducing conditions and pH values.
- Highlighted a cobaloxime and a cobalt tetraazamacrocyclic complex for their excellent catalytic rates, particularly under thermal conditions.
Conclusions:
- The developed screening method offers a robust alternative for catalyst assessment.
- Cobalt-based catalysts exhibit significant versatility and potential for efficient H2 production.
- Optimized conditions, especially thermal, can yield superior catalytic performance.
Keywords:
analytical methodselectrochemistryhomogeneous catalysishydrogen evolution reactionphotochemistryMore Related Videos
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