Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Photocatalytic hydrogen production using Me/Cd0.3Zn0.7S (Me = Au, Pt, Pd) catalysts : Transformation of the metallic catalyst under the action of the reaction medium. / Kozlova, E. A.; Kurenkova, A. Yu; Kolinko, P. A. и др.
в: Kinetics and Catalysis, Том 58, № 4, 07.2017, стр. 431-440.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Photocatalytic hydrogen production using Me/Cd0.3Zn0.7S (Me = Au, Pt, Pd) catalysts
T2 - Transformation of the metallic catalyst under the action of the reaction medium
AU - Kozlova, E. A.
AU - Kurenkova, A. Yu
AU - Kolinko, P. A.
AU - Saraev, A. A.
AU - Gerasimov, E. Yu
AU - Kozlov, D. V.
PY - 2017/7
Y1 - 2017/7
N2 - The activity and stability of Me/Cd0.3Zn0.7S (Me = Au, Pt, Pd) photocatalysts in the course of hydrogen production from water under the action of visible radiation have been investigated. The mechanism of activation and deactivation of the catalysts have been elucidated for the first time using X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. An increase in the hydrogen evolution rate is observed for all of the catalysts at the early stages of testing. The highest hydrogen evolution rate, 5.4 μmol/min, is afforded by the 1%Pt/Cd0.3Zn0.7S catalyst. The activity of the Au/Cd0.3Zn0.7S and Pt/Cd0.3Zn0.7S catalysts becomes constant 7.5–9 h after the beginning of the photocatalytic test, while in the case of Pd/Cd0.3Zn0.7S the hydrogen evolution rate increases over the initial 6 h and then decreases. These specific features of the catalysts likely correlate with the initial state of the metals on the support surface. In particular, supported palladium is in the form of PdO, while gold and platinum are in the metallic state. The Au/Cd0.3Zn0.7S and Pt/Cd0.3Zn0.7S photocatalysts are activated due to metal encapsulation; the 1%Pd/Cd0.3Zn0.7S catalyst, due to the partial reduction of PdO to PdOx. The 1%Pd/Cd0.3Zn0.7S catalyst is deactivated because of the aggregation of nanoparticles of the cadmium sulfide–zinc sulfide solid solution.
AB - The activity and stability of Me/Cd0.3Zn0.7S (Me = Au, Pt, Pd) photocatalysts in the course of hydrogen production from water under the action of visible radiation have been investigated. The mechanism of activation and deactivation of the catalysts have been elucidated for the first time using X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. An increase in the hydrogen evolution rate is observed for all of the catalysts at the early stages of testing. The highest hydrogen evolution rate, 5.4 μmol/min, is afforded by the 1%Pt/Cd0.3Zn0.7S catalyst. The activity of the Au/Cd0.3Zn0.7S and Pt/Cd0.3Zn0.7S catalysts becomes constant 7.5–9 h after the beginning of the photocatalytic test, while in the case of Pd/Cd0.3Zn0.7S the hydrogen evolution rate increases over the initial 6 h and then decreases. These specific features of the catalysts likely correlate with the initial state of the metals on the support surface. In particular, supported palladium is in the form of PdO, while gold and platinum are in the metallic state. The Au/Cd0.3Zn0.7S and Pt/Cd0.3Zn0.7S photocatalysts are activated due to metal encapsulation; the 1%Pd/Cd0.3Zn0.7S catalyst, due to the partial reduction of PdO to PdOx. The 1%Pd/Cd0.3Zn0.7S catalyst is deactivated because of the aggregation of nanoparticles of the cadmium sulfide–zinc sulfide solid solution.
KW - CdZnS
KW - hydrogen production
KW - photocatalysis
KW - GOLD NANOPARTICLES
KW - OXIDATION
KW - AQUEOUS-SOLUTIONS
KW - CADMIUM-SULFIDE
KW - OPTICAL-PROPERTIES
KW - ENERGY-CONVERSION
KW - EVOLUTION
KW - FILMS
KW - Cd1-xZnxS
KW - RAY PHOTOELECTRON-SPECTROSCOPY
KW - VISIBLE-LIGHT IRRADIATION
UR - http://www.scopus.com/inward/record.url?scp=85026767329&partnerID=8YFLogxK
U2 - 10.1134/S0023158417040097
DO - 10.1134/S0023158417040097
M3 - Article
AN - SCOPUS:85026767329
VL - 58
SP - 431
EP - 440
JO - Kinetics and Catalysis
JF - Kinetics and Catalysis
SN - 0023-1584
IS - 4
ER -
ID: 10069873