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Active {010} facet-exposed Cu2MoS4 nanotube as high-efficiency photocatalyst

Nano Research 2017年第11期10卷 3817-3825页

作者： Ke Zhang Yunxiang Lin Zahir Muhammad Chuanqiang Wu Shuang Yang Qun He Xusheng Zheng Shuangming Chen Binghui Ge Li Song National Synchrotron Radiation Laboratory CAS Center for Excellence in Nanoscience University of Science and Technology of China Hefei 230029 China Beijing National Laboratory for Condensed Mater Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China

Rational design and facet-engineering of nanocrystal is an effective strategy to optimize the catalytic performance of abundant and economic semiconductorbased *** this study,we demonstrate a novel ternary Cu2MoS4 nanotube with the {010} facet exposed,synthesized via a hydrothermal *** with two-dimensional Cu2MoS4 nanosheet with the {001} facet exposed,this one-dimensional nanotube exhibits highly enhanced performance of photodegradation and water *** theoretical calculations and experimental results suggest that the conduction band minimum （CBM） of the {010} facet crystal shows lower potential than that of the {001} *** particular,the up-shifted CBM in Cu2MoS4 nanotube is significantly beneficial for the absorption of dye molecules and reduction of H＋ to *** results may open a new route for realizing high-efficiency photocatalysts based on Cu2MX4 by facet engineering.

关键词： nanotube facet control photodegradation watersplitting theoretical calculations

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Deep eutectic solvents:Green multi-task agents for sustainable super green hydrogen technologies

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Journal of Energy Chemistry 2024年第5期92卷 357-382页

作者： Raiyan Al-Farsi Maan Hayyan Renewable Energy Engineering Program Faculty of Engineering and TechnologyMuscat UniversityMuscat 130Oman Chemical Engineering Program Faculty of Engineering and TechnologyMuscat UniversityMuscat 130Oman

While reliance on renewable energy resources has become a reality, there is still a need to deploy greener and more sustainable methods in order to achieve sustainable development goals. Indeed, green hydrogen is currently believed to be a reliable solution for global warming and the pollution challenges arising from fossil fuels, making it the resilient fuel of the future. However, the sustainability of green hydrogen technologies is yet to be achieved. In this context, generation of green hydrogen with the aid of deep eutectic solvents(DESs) as green mixtures has been demonstrated as a promising research area. This systematic review article covers green hydrogen generation through water splitting and biomass fermentation when DESs are utilized within the generation process. It also discusses the incorporation of DESs in fuel cell technologies. DESs can play a variety of roles such as solvent, electrolyte, or precursor;colloidal suspension and reaction medium;galvanic replacement, shape-controlling, decoration, or extractive agent;finally oxidant. These roles are relevant to several methods of green hydrogen generation, including electrocatalysis, photocatalysis, and fermentation. As such, it is of utmost importance to screen potential DES formulations and determine how they can function in and contribute throughout the green hydrogen mobility stages. The realization of super green hydrogen generation stands out as a pivotal milestone in our journey towards achieving a more sustainable form of development;DESs have great potential in making this milestone achievable. Overall, incorporating DESs in hydrogen generation constitutes a promising research area and offers potential scalability for green hydrogen production, storage,transport, and utilization.

关键词： watersplitting Biohydrogen Super green hydrogen Electrocatalysis Photocatalysis Fuel cell Power-to-X

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Bimetallic Ni-Mo nitride@C_(3)N_(4) for highly active and stable water catalysis

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Frontiers of Materials Science 2022年第3期16卷 181-191页

作者： Xinping LI Min ZHOU Zhuoxun YIN Xinzhi MA Yang ZHOU College of Chemistry and Chemical Engineering Qiqihar UniversityQiqihar 161006China School of Physics and Electronic Engineering Harbin Normal UniversityHarbin 150025China College of Science Qiqihar UniversityQiqihar 161006China

Non-noble metal electrocatalysts for water cracking have excellent pro-spects for development of sustainable and clean *** efficient electrocatalysts for the oxygen evolution reaction(OER)are very important for various energy storage and conversion systems such as water splitting devices and metal-air *** study prepared a NiMo4@C_(3)N_(4) catalyst for OER and hydrogen evolution reaction(HER)by simple *** catalyst exhibited an excellent OER activity based on the response at a suitable *** drive a current density of 10 mA-cm^(-2) for OER and HER,the overpotentials required for NiMo4@C_(3)N_(4)-800(prepared at 800℃)were 259 and 118 mV,respectively.A two-electrode system using NiMo4@C_(3)N_(4)-800 needed a very low cell potential of 1.572 V to reach a current density of 10 mA-cm^(-2).In addition,this catalyst showed excellent durability after long-term *** was seen to have good catalytic activity and broad application prospects.

关键词： stability oxygen reduction reaction watersplitting electrocatalyst

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Regulating the Photoisomerization of Covalent Organic Framework for Enhanced Photocatalytic Hydrogen Evolution

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Chinese Journal of Chemistry 2024年第21期42卷 2621-2626页

作者： Xingye Huang Jia Guo State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai200438 China

Covalent organic framework(COF)is a desirable platform to tailor electronic properties for improving photocatalytic ***,the study on excited-state configurations that determine photogenerated carrier dynamics has long been ***,we concentrate on the molecular design ofβ-ketoenamine-linked COFs to drive their photoisomerization via the excited-state intra-molecular proton transfer(ESIPT),which can induce the partial keto-to-enol tautomerization and accordingly rearrange the photoinduced charge *** demonstrate that the push-pull electronic effect of functional side groups attached on the framework linkers is directly correlated with the ESIPT *** phenylene linkers modified with electron-withdrawing cyano-groups reinforce the ESIPT-induced tautomerization,leading to the in situ partial enolization for extendedπ-conjugation and rearranged electron-hole *** contrast,the electron-rich linkers limit the photoisomerization of COF and suppress the photoinduced electron ***,the maximum hydrogen evolution rate is achieved by the cyano-modified COF,reaching as high as 162.72 mmol·g^(-1)·h^(-1) with an apparent quantum efficiency of 13.44%at 475 nm,which is almost 11.5-fold higher than those of analogous COFs with electron-rich *** work opens up an avenue to control over the excited-state structure transformation for enhanced photochemical applications.

关键词： Covalent organic framework Hydrogen evolution reaction Photoisomerization PhotocatalysisI Charge separation watersplitting

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