Single-site Sn-grafted Ru/TiO2 photocatalysts for biomass reforming: Synergistic effect of dual co-catalysts and molecular mechanism

During centriole duplication, a preprocentriole forms at a single site on the mother centriole through a process that includes the hierarchical recruitment of a conserved set of proteins, including the Polo-like kinase 4 (Plk4), Ana2/STIL, and the cartwheel protein Sas6. Ana2/STIL is critical for procentriole assembly, and its recruitment is controlled by the kinase activity of Plk4, but how this works remains poorly understood. A structural motif called the G-box in the centriole outer wall protein Sas4 interacts with a short region in the N terminus of Ana2/STIL. Here, we show that binding of Ana2 to the Sas4 G-box enables hyperphosphorylation of the Ana2 N terminus by Plk4. Hyperphosphorylation increases the affinity of the Ana2–G-box interaction, and, consequently, promotes the accumulation of Ana2 at the procentriole to induce daughter centriole formation.

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Single-Site Photocatalytic H2 Evolution from Covalent Organic Frameworks with Molecular Cobaloxime Co-Catalysts

Journal of the American Chemical Society ◽

10.1021/jacs.7b07489 ◽

2017 ◽

Vol 139 (45) ◽

pp. 16228-16234 ◽

Cited By ~ 128

Author(s):

Tanmay Banerjee ◽

Frederik Haase ◽

Gökcen Savasci ◽

Kerstin Gottschling ◽

Christian Ochsenfeld ◽

...

Keyword(s):

Single Site ◽

Covalent Organic Frameworks ◽

H2 Evolution ◽

Co Catalysts ◽

Photocatalytic H2 Evolution

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Carbon nanotubes-modified graphitic carbon nitride photocatalysts with synergistic effect of nickel(II) sulfide and molybdenum(II) disulfide co-catalysts for more efficient H2 evolution

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2018.05.003 ◽

2018 ◽

Vol 526 ◽

pp. 374-383 ◽

Cited By ~ 14

Author(s):

Yun-Xiao Zhang ◽

Kui Li ◽

Yu-Xiang Yu ◽

Wei-De Zhang

Keyword(s):

Carbon Nanotubes ◽

Synergistic Effect ◽

Carbon Nitride ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

H2 Evolution ◽

Co Catalysts

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Study of PtOx/TiO2 Photocatalysts in the Photocatalytic Reforming of Glycerol: The Role of Co-Catalyst Formation

Materials ◽

10.3390/ma11101927 ◽

2018 ◽

Vol 11 (10) ◽

pp. 1927 ◽

Cited By ~ 6

Author(s):

Katalin Majrik ◽

Zoltán Pászti ◽

László Korecz ◽

László Trif ◽

Attila Domján ◽

...

Keyword(s):

Adsorbed Water ◽

Particle Growth ◽

H2 Production ◽

Incipient Wetness Impregnation ◽

1H Mas Nmr ◽

Tio2 Photocatalysts ◽

Co Catalyst ◽

Co Catalysts ◽

Preparation Conditions ◽

Catalyst Formation

In this study, relationships between preparation conditions, structure, and activity of Pt-containing TiO2 photocatalysts in photoinduced reforming of glycerol for H2 production were explored. Commercial Aerolyst® TiO2 (P25) and homemade TiO2 prepared by precipitation-aging method were used as semiconductors. Pt co-catalysts were prepared by incipient wetness impregnation from aqueous solution of Pt(NH3)4(NO3)2 and activated by calcination, high temperature hydrogen, or nitrogen treatments. The chemico-physical and structural properties were evaluated by XRD, 1H MAS NMR, ESR, XPS, TG-MS and TEM. The highest H2 evolution rate was observed over P25 based samples and the H2 treatment resulted in more active samples than the other co-catalyst formation methods. In all calcined samples, reduction of Pt occurred during the photocatalytic reaction. Platinum was more easily reducible in all of the P25 supported samples compared to those obtained from the more water-retentive homemade TiO2. This result was related to the negative effect of the adsorbed water content of the homemade TiO2 on Pt reduction and on particle growth during co-catalyst formation.

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