Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Sulfuric Acid Solutions of [Pt(OH)4(H2O)2]: A Platinum Speciation Survey and Hydrated Pt(IV) Oxide Formation for Practical Use. / Vasilchenko, Danila; Tkachenko, Pavel; Tkachev, Sergey и др.
в: Inorganic Chemistry, Том 61, № 25, 27.06.2022, стр. 9667-9684.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Sulfuric Acid Solutions of [Pt(OH)4(H2O)2]: A Platinum Speciation Survey and Hydrated Pt(IV) Oxide Formation for Practical Use
AU - Vasilchenko, Danila
AU - Tkachenko, Pavel
AU - Tkachev, Sergey
AU - Popovetskiy, Pavel
AU - Komarov, Vladislav
AU - Asanova, Tatyana
AU - Asanov, Igor
AU - Filatov, Evgeny
AU - Maximovskiy, Eugene
AU - Gerasimov, Evgeny
AU - Zhurenok, Angelina
AU - Kozlova, Ekaterina
N1 - This work was supported by the Russian Science Foundation (RSF grant 21-73-10038). The authors deeply thank Dr. P.E. Plusnin for his assistance with TGA, Dr. B.A. Kolesov for recording the Raman spectra, and the XRD facility of NIIC SB RAS for the single-crystal data collection. The authors also thank PALII (Pohang, South Korea) for beam allocation time at the 1D-XRS beamline.
PY - 2022/6/27
Y1 - 2022/6/27
N2 - The systematic study of the platinum speciation in sulfuric acid solutions of platinum (IV) hydroxide {[Pt(OH)4(H2O)2], HHPA} was performed with the use of a combination of methods. Depending on the prevailing Pt form, the three regions of H2SO4 concentration were marked: (1) up to 3 M H2SO4 forms unstable solutions gradually generating the PtO2·xH2O particles; (2) 4-12 M H2SO4, where the series of mononuclear aqua-sulfato complexes ([Pt(SO4)n(H2O)6-n]4-2n, where n = 0···4) dominate; and (3) 12 M and above, where, along with [Pt(SO4)n(H2O)6-n]4-2n species, the polynuclear Pt(IV) species and complexes with a bidentate coordination mode of the sulfato ligand are formed. For the first time, the salts of the aqua-hydroxo Pt(IV) cation [Pt(OH)2(H2O)4]SO4 (triclinic and monoclinic phases) were isolated and studied with a combination of methods, including the single-crystal X-ray diffraction. The formation of PtO2·xH2O particles in sulfuric acid solutions (1-3 M) of HHPA and their spectral characteristics and morphology were studied. The deposition of PtO2·xH2O was highlighted as a convenient method to prepare various Pt-containing heterogeneous catalysts. This possibility was illustrated by the preparation of Pt/g-C3N4 catalysts, which show an excellent performance in catalytic H2 generation under visible light irradiation with a quantum efficiency up to 5% and a rate of H2 evolution up to 6.2 mol·h-1 per gram of loaded platinum.
AB - The systematic study of the platinum speciation in sulfuric acid solutions of platinum (IV) hydroxide {[Pt(OH)4(H2O)2], HHPA} was performed with the use of a combination of methods. Depending on the prevailing Pt form, the three regions of H2SO4 concentration were marked: (1) up to 3 M H2SO4 forms unstable solutions gradually generating the PtO2·xH2O particles; (2) 4-12 M H2SO4, where the series of mononuclear aqua-sulfato complexes ([Pt(SO4)n(H2O)6-n]4-2n, where n = 0···4) dominate; and (3) 12 M and above, where, along with [Pt(SO4)n(H2O)6-n]4-2n species, the polynuclear Pt(IV) species and complexes with a bidentate coordination mode of the sulfato ligand are formed. For the first time, the salts of the aqua-hydroxo Pt(IV) cation [Pt(OH)2(H2O)4]SO4 (triclinic and monoclinic phases) were isolated and studied with a combination of methods, including the single-crystal X-ray diffraction. The formation of PtO2·xH2O particles in sulfuric acid solutions (1-3 M) of HHPA and their spectral characteristics and morphology were studied. The deposition of PtO2·xH2O was highlighted as a convenient method to prepare various Pt-containing heterogeneous catalysts. This possibility was illustrated by the preparation of Pt/g-C3N4 catalysts, which show an excellent performance in catalytic H2 generation under visible light irradiation with a quantum efficiency up to 5% and a rate of H2 evolution up to 6.2 mol·h-1 per gram of loaded platinum.
UR - http://www.scopus.com/inward/record.url?scp=85132950056&partnerID=8YFLogxK
U2 - 10.1021/acs.inorgchem.2c01134
DO - 10.1021/acs.inorgchem.2c01134
M3 - Article
C2 - 35700060
AN - SCOPUS:85132950056
VL - 61
SP - 9667
EP - 9684
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 25
ER -
ID: 36496647