Chemical Society Reviews· 2018Q1· Review
Recent developments in heterogeneous photocatalysts for solar-driven overall water splitting
- 2,267citations
- Q1SCImago
- 2018year
Short summary
Heterogeneous photocatalysts enable cost-effective solar-driven hydrogen production via overall water splitting, with recent advances in surface engineering and Z-scheme systems showing promise for large-scale applications.
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Key points
- Overall water splitting via photocatalysis is a cost-effective method for solar hydrogen production.
- Advancements focus on one-step excitation and Z-scheme processes, with standardized performance determination methods.
- Surface engineering (cocatalyst loading, morphology control, modification, phase junctions) enhances one-step water splitting.
- Visible-light-responsive photocatalysts are key for Z-scheme systems.
- Immobilized photocatalyst systems show performance comparable to or better than suspended particles, paving the way for large-scale production.
AI-generated from the title and abstract; the full text is not read.
Abstract
Overall water splitting based on particulate photocatalysts is an easily constructed and cost-effective technology for the conversion of abundant solar energy into clean and renewable hydrogen energy on a large scale. This promising technology can be achieved in a one-step excitation system using a single photocatalyst or via a Z-scheme process based on a pair of photocatalysts. Ideally, such photocatalysis will proceed with charge separation and transport unaffected by recombination and trapping, and surface catalytic processes will not involve undesirable reactions. This review summarizes the basics of overall water splitting via both one-step excitation and Z-scheme processes, with a focus on standard methods of determining photocatalytic performance. Various surface engineering strategies applied to photocatalysts, such as cocatalyst loading, surface morphology control, surface modification and surface phase junctions, have been developed to allow efficient one-step excitation overall water splitting. In addition, numerous visible-light-responsive photocatalysts have been successfully utilized as H2-evolution or O2-evolution photocatalysts in Z-scheme overall water splitting. Prototype particulate immobilization systems with photocatalytic performances comparable to or drastically higher than those of particle suspension systems suggest the exciting possibility of the large-scale production of low-cost renewable solar hydrogen.
The authors' abstract, as published at the source. Chemical Society Reviews, 2018 · DOI ↗
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Field: Renewable Energy, Sustainability and the Environment
Renewable Energy, Sustainability and the EnvironmentEnergy