Effects of Periodic Pore Ordering on Photocatalytic Hydrogen Generation with Mesoporous Semiconductor Oxides

Title data

Weller, Tobias ; Timm, Jana ; Deilmann, Leonie ; Dörr, Tobias S. ; Greve, Christopher ; Cherevan, Alexey S. ; Beaucage, Peter A. ; Wiesner, Ulrich B. ; Herzig, Eva M. ; Eder, Dominik ; Marschall, Roland:
Effects of Periodic Pore Ordering on Photocatalytic Hydrogen Generation with Mesoporous Semiconductor Oxides.
In: Small Structures. Vol. 4 (2023) Issue 6 . - 2200184.
ISSN 2688-4062
DOI: https://doi.org/10.1002/sstr.202200184

Official URL:

Abstract in another language

Crystalline and 3D continuous mesoporous quaternary CsTaWO6 semiconductors are prepared with different degrees of long-range periodic order and local order, respectively, to investigate the influence of periodic pore order on the photocatalytic performance in hydrogen evolution of mesoporous photocatalysts. The degree of long-range order of the mesopores is changed by modifying the ratio between metal precursors and soft polymer template poly(isoprene-b-styrene-b-ethylene oxide) (PI-b-PS-b-PEO; ISO) in the sol–gel synthesis. Long-range periodic order is found to have no appreciable advantage compared with an only locally ordered continuous pore system. On the contrary, nonperiodically ordered mesopores result in higher activity toward photocatalytic hydrogen evolution, even with slightly smaller pore diameter and lower cumulative pore volume. Most importantly, it is shown that pore connectivity and heterogeneous pore systems in mesoporous photocatalysts play a major role for hydrogen evolution when other parameters are confirmed to be not rate limiting.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	hydrogen evolution reactions; mesopores; photocatalyses; pore ordering; scanning isotherms
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessor Experimental Physics VII - Dynamics and Structure Formation Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessor Experimental Physics VII - Dynamics and Structure Formation > Juniorprofessor Experimental Physics VII - Dynamics and Structure Formation - Juniorprof. Dr. Eva M. Herzig Faculties Faculties > Faculty of Mathematics, Physics und Computer Science
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 530 Physics
Date Deposited:	07 Nov 2022 07:38
Last Modified:	09 Oct 2023 12:54
URI:	https://eref.uni-bayreuth.de/id/eprint/72673