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Manuscript Submission Deadline 31 March 2023

Owing to the rapid escalation of global energy consumption and the incapability of energy replenishment from finite sources of conventional fossil fuels, a transition of energy sector to more promising renewable carriers is anticipated in the near future. Particularly, solar energy can be converted and stored in chemical form, i.e., hydrogen, hydrocarbon fuels and ammonia via artificial photosynthesis mean. A recreation of this process can be attained in photocatalytic and photoelectrochemical (PEC) systems through light-driven water splitting, CO2 reduction and NH3 synthesis. However, practical solar fuel production can only be realized if revolutionary studies on photocatalytic and PEC systems are persisted, especially on the fundamental aspects and smart engineering of the materials.

Photocatalysts and photoelectrodes are generally made from semiconductors which consists of a band gap with filled top valence band (TVB) and vacant bottom conduction band (BCB). In this context, an efficient photocatalysts should render the following properties: (1) small band gap, (2) effective charge separation and (3) strong redox potentials. Besides, fundamental catalytic feature of materials such as standard adsorption free energy also plays an important role in governing the reaction kinetics. However, it is extremely difficult for single-component photocatalytic or PEC systems to fulfil the stringent requirements. The properties of small band gap and strong redox potentials (BCB should be more electronegative than reduction potential while TVB should be more electropositive than oxidation potential of reactants) are mutually exclusive. Moreover, the effectiveness of charge separation and adsorption behaviour of catalytic sites are significant in determining the kinetics of redox reaction. Thus, the goal of this research topic is to present avenue in realizing highly efficient photocatalytic and PEC systems for solar fuels production, which includes but are not limited to the following aspects: (1) design and engineering of nano-materials, (2) development of heterojunction-type photocatalysts and photoelectrodes and (3) kinetic studies of optoelectronic and catalytic properties of materials.

The types of manuscripts we are interested in receiving include;

• Engineering of advanced materials for photocatalytic and photoelectrochemical water splitting, CO2 reduction and NH3 synthesis
• Development of heterojunction-typed photocatalytic system (Z-scheme, p-n junction, homojunction and etc.)
• Development of efficient dual-absorber tandem PEC system
• Reaction kinetic and optoelectronic studies of materials via theoretical approach such as DFT

Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.

Owing to the rapid escalation of global energy consumption and the incapability of energy replenishment from finite sources of conventional fossil fuels, a transition of energy sector to more promising renewable carriers is anticipated in the near future. Particularly, solar energy can be converted and stored in chemical form, i.e., hydrogen, hydrocarbon fuels and ammonia via artificial photosynthesis mean. A recreation of this process can be attained in photocatalytic and photoelectrochemical (PEC) systems through light-driven water splitting, CO2 reduction and NH3 synthesis. However, practical solar fuel production can only be realized if revolutionary studies on photocatalytic and PEC systems are persisted, especially on the fundamental aspects and smart engineering of the materials.

Photocatalysts and photoelectrodes are generally made from semiconductors which consists of a band gap with filled top valence band (TVB) and vacant bottom conduction band (BCB). In this context, an efficient photocatalysts should render the following properties: (1) small band gap, (2) effective charge separation and (3) strong redox potentials. Besides, fundamental catalytic feature of materials such as standard adsorption free energy also plays an important role in governing the reaction kinetics. However, it is extremely difficult for single-component photocatalytic or PEC systems to fulfil the stringent requirements. The properties of small band gap and strong redox potentials (BCB should be more electronegative than reduction potential while TVB should be more electropositive than oxidation potential of reactants) are mutually exclusive. Moreover, the effectiveness of charge separation and adsorption behaviour of catalytic sites are significant in determining the kinetics of redox reaction. Thus, the goal of this research topic is to present avenue in realizing highly efficient photocatalytic and PEC systems for solar fuels production, which includes but are not limited to the following aspects: (1) design and engineering of nano-materials, (2) development of heterojunction-type photocatalysts and photoelectrodes and (3) kinetic studies of optoelectronic and catalytic properties of materials.

The types of manuscripts we are interested in receiving include;

• Engineering of advanced materials for photocatalytic and photoelectrochemical water splitting, CO2 reduction and NH3 synthesis
• Development of heterojunction-typed photocatalytic system (Z-scheme, p-n junction, homojunction and etc.)
• Development of efficient dual-absorber tandem PEC system
• Reaction kinetic and optoelectronic studies of materials via theoretical approach such as DFT

Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.

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