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Published on: December 6, 2021
Engineering Noble Metals Single-Atom Catalysts for Photothermal-Enhanced Photocatalytic Hydrogen Production
Luyu Zhou1, Sixiang Liu2,3, Lei Mou1
1Department of Electronic Science and Technology, Institute of Advanced Optoelectronic Materials and Technology, College of Big Data and Information Engineering, Guizhou University, Guiyang, 550025, People's Republic of China.
This review details photothermal-enhanced photocatalytic hydrogen evolution (PHE) using single-atom catalysts (SACs). It proposes frameworks for verifying active sites and scaling up solar hydrogen production.
Area of Science:
- Materials Science
- Catalysis
- Renewable Energy
Background:
- Photothermal-enhanced photocatalytic hydrogen evolution (PHE) leverages nonradiative energy loss for heating.
- Single-atom catalysts (SACs) offer high atom efficiency and defined active sites.
- Challenges include poorly constrained reaction temperatures, unverified active species, and poor scalability.
Purpose of the Study:
- To review material platforms for photothermal harvesting and SAC design.
- To define support requirements for efficient PHE.
- To propose frameworks for mechanistic understanding and practical application.
Main Methods:
- Summarizing material platforms and support requirements.
- Defining roles of noble metals in PHE.
- Proposing thermometry-anchored protocols for disentangling effects.
- Outlining operando and ultrafast spectroscopy for active site verification.
- Developing scale-relevant design rules.
Main Results:
- Identified key support requirements: light absorption, charge/heat transport, stable anchoring.
- Proposed frameworks for temperature control, kinetic analysis, and activation energy benchmarking.
- Established methods for real-time tracking of dynamic active sites.
- Connected fundamental understanding to scale-up considerations.
Conclusions:
- Standardized protocols are needed for comparing PHE performance.
- Mechanistic understanding is crucial for designing efficient and stable SACs.
- Actionable frameworks guide the development of deployable solar hydrogen production systems.
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