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Toward Standardized Photocatalytic Oxygen Evolution Rates Using RuO2@TiO2 as a Benchmark
Hugo A Vignolo-González1,2, Sourav Laha1, Alberto Jiménez-Solano1
1Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany.
Matter
|August 18, 2020
Summary
This study introduces a standardized method for comparing photocatalytic performance using a benchmark material and optimized oxygen evolution reaction (OER) conditions. It ensures reliable quantification for artificial photosynthesis research.
Area of Science:
- Photocatalysis
- Artificial Photosynthesis
- Materials Science
Background:
- Quantitative comparison of photocatalytic performance is challenging due to varying experimental setups.
- Standardized methods are needed for reliable data in artificial photosynthesis.
Purpose of the Study:
- To develop a reproducible method for quantifying photocatalytic activity.
- To establish a benchmark material and experimental best practices for the oxygen evolution reaction (OER).
Main Methods:
- Utilized relative and optimal photonic efficiencies with a RuO2/P25-TiO2 benchmark.
- Identified best practices for photoreactor design, catalyst dispersion, and controlling parasitic reactions.
- Combined optical modeling and measurements to quantify absorbed/scattered light and internal quantum efficiency.
Main Results:
- Optimized RuO2/P25-TiO2 for reproducible OER.
- Quantified benchmark light absorption (7.6%) and scattering (81.2%).
- Estimated internal quantum efficiency of the benchmark at 16%.
Conclusions:
- The proposed framework facilitates standardization and comparison of photocatalysts.
- Adoption of these methods will advance the field of artificial photosynthesis.
- Reliable quantification of photocatalytic OER is achievable with standardized protocols.
