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pt nanoclusters modified porous g-C_(3)N_(4)nanosheets to significantly enhance hydrogen production by photocatalytic water reforming of methanol

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Chinese Journal of Chemical Engineering 2024年第2期66卷 40-50页

作者： Yi-Fei Liang Jin-Rong Lu Shang-Kun Tian Wen-Quan Cui Li Liu Hebei Provincial Key Laboratory of Environmental Photocatalytic and Electrocatalytic Materials College of Chemical EngineeringNorth China University of Science and TechnologyTangshan 063210China

For the use of green hydrogen energy,it is crucial to have efficient photocatalytic activity for hydrogen generation by water reforming of methanol under mild *** attention has been paid to gC_(3)N_(4)as a promising photocatalyst for the generation of *** improve the separation of photogenerated charge,porous nanosheet g-C_(3)N_(4)was modified with pt nanoclusters(pt/g-C_(3)N_(4))through impregnation and following photo-induced *** catalyst showed excellent photocatalytic activity of water reforming of methanol fo r hydrogen production with a 17.12 mmol·g^(-1)·h^(-1)rate at room temperature,which was 311 times higher than that of the unmodified g-C_(3)N_(4).The strong interactions of pt-N in pt/g-C_(3)N_(4)constructed effective electron transfer channels to promote the separation of photogenerated electrons and holes *** addition,in-situ infrared spectroscopy was used to investigate the intermediates of the hydrogen production reaction,which proved that methanol and water eventually turn into H_(2)and CO_(2)via formaldehyde and *** study provides insights for understanding the photocatalytic hydrogen production in the water reforming of methanol.

关键词： Water reforming of methanol Photocatalysis g-C_(3)N_(4) pt nanoclusters Hydrogen production

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Glass-like energy and property landscape of pt nanoclusters

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Nano Research 2017年第8期10卷 2721-2731页

作者： Zhanghui Chen Jingbo Li Shushen Li Lin-Wang Wang Materials Sciences Division Lawrence Berkeley National Laboratory One Cyclotron Road Mail Stop 5OF Berkeley California 94720 USA State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences P.O. Box 912 Beijing 100083 China

pt nanoclusters play an important role in catalysis-related applications. Essential to their activities are their geometries and energy landscapes. In this work, we studied the energy landscapes of pt clusters using a parallel differential evolution optimization algorithm and an accelerated ab initio atomic relaxation method, which allowed us to explore unprecedentedly large numbers of geometry local minima at ab initio level. We found many lower-energy isomers with low symmetry in their geometry. The energy landscapes were demonstrated to be glass-like with a large number of local minimum structures close to the global minimum. The electronic and magnetic properties of most glass-like local minima were dramatically different from the global minimum, and they should be observed in the experimental measurements. The connections between these local minima were further analyzed using data mining techniques.

关键词： pt nanoclusters energy landscape glassy global search ab initio

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Cytochrome-c aptamer functionalized pt nanoclusters for enhanced chemodynamic therapy

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Journal of Innovative Optical Health Sciences 2021年第4期4卷 64-71页

作者： Bo Feng Dan Zhao Yaowei Peng Fu Wang Med-X Research Institute and School of Biomedical Engineering Shanghai Jiao Tong University Shanghai 200240P.R.China

Catalysis-based chemodynamic therapy(CDT)is an emerging cancer treatment strategy which uses a Fenton-like reaction to kill tumor cells by catalyzing endogenous hydrogen peroxide(H_(2)O_(2))into a toxic hydroxyl radical(·OH).The performance of CDT is greatly dependent on PDT ***,mitochondria-targeting pt nanoclusters were synthesized using cytochrome c aptamer(CytcApt)as *** obtained CytcApt-ptNCs can *** by H_(2)O_(2)under the acidic ***,CytcApt-ptNCs could kill 4T1 tumor cells in a pH-dependent manner,but had no side effect on normal 293T ***,CytcApt-ptNCs possess excellent therapeutic effect and good biosafety,indicating their great potential for CDT.

关键词： chemodynamic therapy pt nanoclusters cytochrome c aptamer

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The hybrid pt nanoclusters/Ru nanowires catalysts accelerating alkaline hydrogen evolution reaction

Advanced Powder Materials

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Advanced Powder Materials 2024年第5期3卷 23-32页

作者： Jingjing Yan Rundong Wu Guoqiang Jin Litao Jia Gang Feng Xili Tong State Key Laboratory of Coal Conversion Analytical Instrumentation CenterInstitute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Jiangxi Province for Environment and Energy Catalysis Institute of Applied ChemistrySchool of Chemistry and Chemical EngineeringNanchang UniversityNanchang 330031China

Water electrolysis via alkaline hydrogen evolution reaction(HER)is a promising approach for large-scale production of high-purity hydrogen at a low cost,utilizing renewable and clean ***,the sluggish kinetics derived from the high energy barrier of water dissociation impedes seriously its practical ***,a series of hybrid pt nanoclusters/Ru nanowires(pt/Ru NWs)catalysts are demonstrated to accelerate alkaline *** the optimized pt/Ru NWs(10%wt pt)exhibits exceptional performance with an ultralow overpotential(24 mV at 10 mA cm^(-2)),a small Tafel slope(26.3 mV dec^(-1)),and long-term stability,outperforming the benchmark commercial pt/C-JM-20%wt *** amazing performance also occurred in the alkaline anion-exchange membrane water electrolysis devices,where it delivered a cell voltage of about 1.9 V at 1 A cm^(-2)and an outstanding stability(more than 100 h).The calculations have revealed such a superior performance exhibited by pt/Ru NWs stems from the formed heterointerfaces,which significantly reduce the energy barrier of the decisive rate step of water dissociation via cooperative-action between pt cluster and Ru *** work provides valuable perspectives for designing advanced materials toward alkaline HER and beyond.

关键词： Cooperative-action pt nanoclusters Ru nanowires Hydrogen evolution reaction Heterointerface

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