No abstract

Platinum-based (Pt-based) catalysts are considered as the most effective electrocatalysts for the hydrogen evolution reaction (HER). Because of the high cost, it is essential to improve the mass activity and durability of platinum by studying the relationship between Pt and the supports. Herein, a series of modified Ti3C2T x -based (T = O, OH, F; MXene) supports are synthesized, and Pt was loaded by the wet-impregnation and photoinduced reduction method. This is the first report that Pt-based MXenes have been used to promote HER efficiency with promising performance. The obtained catalyst achieves an overpotential of 55 mV at a current density of 10 mA cm–2. The overpotential mainly relies on the electronic state of Pt, which in turn is influenced by the surface terminals (Ti–OH or Ti–O) of the modified Ti3C2T x . The enhanced charge transfer between O terminals and Pt accelerates the HER kinetics and, hence, the overall catalytic performance.

. (2015) 'Supramolecular gel control of cisplatin crystallization : identi cation of a new solvate form using a cisplatin-mimetic gelator.', Crystal growth design., 15 (9). pp. 4591-4599. Further information on publisher's website:http://dx.doi.org/10.1021/acs.cgd.5b00840Publisher's copyright statement:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Crystal Growth Design, copyright c 2015 American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://dx.doi.org/10.1021/acs.cgd.5b00840. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. ABSTRACT: A series of platinum based low molecular weight urea-based gelators C1, C2 and C3, mimicking the structure of the anticancer drug cisplatin has been synthesized, as part of the development of a targeted, supramolecular gel phase crystallization and polymorphism screening strategy. Morphological and rheological studies established that inclusion of a longer spacer between the urea and cisplatin-mimetic regions of the gelator (C3) resulted in optimal gelation performance. Interfacial crystallization of cisplatin in a gel-sol biphasic system has been employed to address the insolubility of the drug molecule in organic solvents. A new N,N-dimethylacetamide (DMA) solvate of cisplatin has been identified and a crystal habit modification of the known N,Ndimethylformamide (DMF) solvate form of cisplatin has been observed on crystallization of cisplatin in C3 gels prepared in xylenes. While both targeted and non-targeted gels resulted in the formation of the new DMA solvate, only the targeted C3 gel resulted in high quality single crystal suitable for characterization by single crystal crystallography. The high crystal quality is attributed to a close match between the core geometry of C3 with that of cisplatin together with local order in the gel fibers of C3.

Harvesting solar energy for water desalination is one of the most promising ways to produce clean water. Because of the absorber detachment and base material degradation, the solar steam generator still suffers from drastic energy loss even when using absorber materials with high photothermal conversion efficiency. We herein propose a practical desalination design that can maintain both the working efficiency and operating life. This device is made from the Paulownia wood covalently bonded with MXene on the top. Paulownia wood, as a natural heat insulator, servers as an excellent transport and customized evaporator. This heat absorber–Paulownia wood system achieved an evaporation rate of 1.465 kg m–2 h–1 at 1 sun irradiation, corresponding to 96% solar conversion efficiency. This method is proved to be universal, and the other two implemented materials, graphene oxide and the active carbon, on Paulownia wood were also demonstrated. The theoretical model based on two-phase flow in porous media further suggests this design can accelerate the distillate rate. In this article, the covalently bonded device shows a high solar–thermal conversion efficiency, excellent evaporation rate, and long-time durability, making it a superior candidate for water desalination.