Photocatalysis with reduced TiO2: From Black TiO2to cocatalyst-free hydrogen production

Naldoni A, Altomare M, Zoppellaro G, Liu N, Kment S, Zboril R, Schmuki P (2019)

Publication Type: Journal article

Publication year: 2019

Journal

ACS Catalysis American Chemical Society

Book Volume: 9

Pages Range: 345-364

Journal Issue: 1

DOI: 10.1021/acscatal.8b04068

Abstract

Black TiO 2 nanomaterials have recently emerged as promising candidates for solar-driven photocatalytic hydrogen production. Despite the great efforts to synthesize highly reduced TiO 2 , it is apparent that intermediate degree of reduction (namely, gray titania) brings about the formation of peculiar defective catalytic sites enabling cocatalyst-free hydrogen generation. A precise understanding of the structural and electronic nature of these catalytically active sites is still elusive, as well as the fundamental structure-activity relationships that govern formation of crystal defects, increased light absorption, charge separation, and photocatalytic activity. In this Review, we discuss the basic concepts that underlie an effective design of reduced TiO 2 photocatalysts for hydrogen production such as (i) defects formation in reduced TiO 2 , (ii) analysis of structure deformation and presence of unpaired electrons through electron paramagnetic resonance spectroscopy, (iii) insights from surface science on electronic singularities due to defects, and (iv) the key differences between black and gray titania, that is, photocatalysts that require Pt-modification and cocatalyst-free photocatalytic hydrogen generation. Finally, future directions to improve the performance of reduced TiO 2 photocatalysts are outlined.

Authors with CRIS profile

Marco Altomare Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Ning Liu Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Patrik Schmuki Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO)

Involved external institutions

Palacky University Olomouc / Univerzita Palackého v Olomouci CZ Czech Republic (CZ)

How to cite

APA:

Naldoni, A., Altomare, M., Zoppellaro, G., Liu, N., Kment, S., Zboril, R., & Schmuki, P. (2019). Photocatalysis with reduced TiO2: From Black TiO2to cocatalyst-free hydrogen production. ACS Catalysis, 9(1), 345-364. https://doi.org/10.1021/acscatal.8b04068

MLA:

Naldoni, Alberto, et al. "Photocatalysis with reduced TiO2: From Black TiO2to cocatalyst-free hydrogen production." ACS Catalysis 9.1 (2019): 345-364.

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