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Heterogeneous Catalysis of CO2 Hydrogenation to C2＋ Products

物理化学学报 2018年第8期34卷 858-872页

作者： gao yunnan LIU Shizhen ZHAO Zhenqing TAO Hengcong SUN Zhenyu State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing 100029 R R. China.

The increasing anthropogenic emission of CO_2 leads to global warming, to address which three strategies can be considered: (1) decrease fossil fuel consumption through increased utilization efficiency and lower per capita consumption; (2) replace fossil fuels with renewable energy sources like wind, tidal, solar, and biomass energies; (3) utilize CO_2 efficiently. Despite efforts to reduce energy use and increase the use of carbon-neutral biofuels, it seems that fossil fuels will continue to be a major energy source for the next few decades. Tremendous effort is therefore being focused on developing effective technologies for CO_2 capture and transformation. In particular, the transformation of CO_2 into fuels and chemicals via reduction with renewable hydrogen is a promising strategy for mitigating global warming and energy supply problems. The hydrogenation of CO_2, especially to C_(2+) hydrocarbons and oxygenates, has sparked growing interest. The C_(2+) species can be used as entry platform chemicals for existing value chains, thus providing more advantages than C_1 compounds. However, optimizing catalyst design by integrating multifunctionalities for both CO_2 activation and C-C coupling remains an ongoing challenge. Here, we provide a timely review on the recent progress that has been made in the hydrogenation of CO_2 to higher-order alkanes, olefins, and alcohols by various heterogeneous catalysts. The thermodynamics and kinetics, as well as possible reaction pathways for CO_2 hydrogenation, are discussed. The hydrogenation of CO_2 to hydrocarbons usually involves the initial generation of CO via a reverse water-gas shift (RWGS) reaction followed by hydrogenation of the CO intermediate. The RWGS reaction proceeds through a redox route and an associative pathway. “CH_x” insertion (carbide-type) and “CO” insertion are two proposed mechanisms for this Fischer-Tropsch-like synthesis. Fe- or Co-based catalysts have been widely used to catalyze the hydrogenation o

关键词：全球变暖环境保护化学分析发展现状

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The Attenuation Law of Horizontal Peak Acceleration on the Rock Site in yunnan Area

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Earthquake Research in China 1994年第4期8卷 112-119页

作者： Xiang Jianguang and gao DongSeismological Bureau of yunnan Province,Kunming 650041,China

In this paper,we select 131 accelerograms observed in the yunnan area and cite 114 accelerograms from western *** statistical regression analysis,we get two separate acceleration attenuation formulations based on the data of yunnan and those of both yunnan and western *** analyzing and comparing the above results with the result deprived from intensity-earthquake ground motion,this paper proposes the formula below,which may show the acceleration attenuation feature of the yunnan area:Ap=1291.07e0.5275Ms(R+15)-t.

关键词： The attenuation of peak acceleration Rock site yunnan area

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Fastness and Homogeneous Character of Coating Film on Big Telescope

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天文研究与技术 1999年第S1期 127-129页

作者： Qin Songnian, Li Rufeng, gao Cai (yunnan Observatory, The Chinese Academy of Sciences, Kunming 650011, China)

The paper reports the consideration for fastness and homogeneous character of coating film on large telescope. After coating film, we obtain that the optical homogeneous character of whole mirror is in 1/20 λ, and reflective rate is about 92%. We found that the thin film doesn’t tick to offset paper, and the film is still well after two years.

关键词： Fastness and Homogeneous Character of Coating

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Design Principles and Mechanistic Understandings of Non-Noble-Metal Bifunctional Electrocatalysts for Zinc-Air Batteries

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Nano-Micro Letters 2024年第9期16卷 13-48页

作者： yunnan gao Ling Liu Yi Jiang Dexin Yu Xiaomei Zheng Jiayi Wang Jingwei Liu Dan Luo Yongguang Zhang Zhenjia Shi Xin Wang Ya‑Ping Deng Zhongwei Chen Power Battery and Systems Research Center State Key Laboratory of CatalysisDalian Institute of Chemical PhysicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023People’s Republic of China Department of Chemical Engineering University of WaterlooWaterlooON N2L 3G1Canada Institute of Carbon Neutrality Zhejiang Wanli UniversityNingbo 315100People’s Republic of China College of Materials and Chemistry China Jiliang UniversityHangzhou 310018People’s Republic of China

Zinc-air batteries(ZABs)are promising energy storage systems because of high theoretical energy density,safety,low cost,and abundance of ***,the slow multi-step reaction of oxygen and heavy reliance on noble-metal catalysts hinder the practical applications of ***,feasible and advanced non-noble-metal elec-trocatalysts for air cathodes need to be identified to promote the oxygen catalytic *** this review,we initially introduced the advancement of ZABs in the past two decades and provided an overview of key developments in this ***,we discussed the work-ing mechanism and the design of bifunctional electrocatalysts from the perspective of morphology design,crystal structure tuning,interface strategy,and atomic *** also included theoretical studies,machine learning,and advanced characterization technologies to provide a comprehensive understanding of the structure-performance relationship of electrocatalysts and the reaction pathways of the oxygen redox ***,we discussed the challenges and prospects related to designing advanced non-noble-metal bifunctional electrocatalysts for ZABs.

关键词： Zinc-air batteries Bifunctional electrocatalysts Design principles Mechanistic understandings

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电极和相关材料的干法制备技术

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稀有金属 2023年第12期47卷 1705-1715页

作者：李庆盈罗丹高云楠王新李新陈忠伟华南师范大学信息光电子科技学院广东广州510006 中国科学院大连化学物理研究所辽宁大连116023 肇庆市华师大光电产业研究院广东肇庆526238 肇庆理士电源技术有限公司广东肇庆526238

锂离子电池(LIBs)的出现推动了可再生能源技术和电动汽车的普及,但传统的LIBs电极制造仍受到经济和环境成本的制约。使用无溶剂的干法电极制造技术取代传统湿法涂布工艺有望提高LIBs的稳定循环寿命并实现优异的电化学性能。概述了以干... 详细信息

锂离子电池(LIBs)的出现推动了可再生能源技术和电动汽车的普及,但传统的LIBs电极制造仍受到经济和环境成本的制约。使用无溶剂的干法电极制造技术取代传统湿法涂布工艺有望提高LIBs的稳定循环寿命并实现优异的电化学性能。概述了以干法工艺LIBs制备电极、固态电解质等的研究进展,阐明了包括粘合剂纤维化、粉末喷涂沉积、干粉压片和气相沉积法等一系列干法制备技术的特点,并对比分析了这些技术相对于传统湿法制备技术的优势。值得注意的是,这些干法制备策略通过增加活性材料负载、优化离子/电子传输动力学和减轻副反应明显改善了电化学性能和循环稳定性。尽管实现完全商业化仍存在挑战,但干法电极技术在实现更环保、更具成本效益的高能量密度LIBs制造方面展现出了非凡的潜力,突显了干法制备工艺这一新兴领域进行持续研发的必要性。

关键词：锂离子电池(LIBs) 干法电池材料制备工艺粘结剂纤维化

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薄型CCD用于大色散光谱观测引起的干涉条纹的特征及消除的方法

引用

天文学报 1989年第4期30卷 387-392页

作者：秦松年李如凤高彩中国科学院云南天文台

本文分析了薄型CCD用于大色散光谱观测时干涉条纹产生的原因,特征.给出了消除干涉条纹的方法以及以10830为中心波长处的太阳、恒星光谱的实测处理结果.

关键词： CDD 散光谱干涉条纹消除太阳

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Bulging Performance and Quality Control of Aluminum Alloy Tailor-welded Overlapping Sheets Based on Interface Friction

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 258-264页

作者： gao Tiejun gao Bowen LI Weijie ZHANG Jiabin College of Aerospace Engineering Shenyang Aerospace UniversityShenyang 110136China Shenyang Aerospace Xinguang Group Co.L td. Shenyang 110043China

In order to solve the problem of poor formability caused by different materials and properties in the process of tailor-welded sheets forming,a forming method was proposed to change the stress state of tailor-welded sheets by covering the tailor-welded sheets with better plastic properties overlapping *** the same time,the interface friction effect between the overlapping and tailor-welded sheets was utilized to control the stress magnitude and further improve the formability and quality of the tailor-welded *** this work,the bulging process of the tailor-welded overlapping sheets was taken as the research *** alloy tailor-welded overlapping sheets bulging specimens were studied by a combination of finite element analysis and experimental *** results show that the appropriate use of interface friction between tailor-welded and overlapping sheets can improve the formability of tailor-welded sheets and control the flow of weld seam to improve the forming *** increasing the interface friction coefficient on the side of tailor-welded sheets with higher strength and decreasing that on the side of tailor-welded sheets with lower strength,the deformation of the tailor-welded sheets are more uniform,the offset of the weld seam is minimal,the limit bulging height is maximal,and the forming quality is optimal.

关键词： tailor-welded sheets overlapping sheet bulging interface friction weld seam stress

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Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai Li Zhen Ma Jin-Hua gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

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Macro-mechanics and Microstructure of Nanomaterial-modified Geopolymer Concrete: A Comprehensive Review

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 204-214页

作者： WANG Tao FAN Xiangqian gao Changsheng QU Chiyu The National Key Laboratory of Water Disaster Prevention Nanjing Hydraulic Research InstituteNanjing 210024China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China School of Water Conservancy and Transportation Zhengzhou UniversityZhengzhou 450001China

We have described in detail the effects of nano-SiO_(2),nano-CaCO_(3),carbon nanotubes,and nano-Al_(2)O_(3) on geopolymer concrete from the perspectives of macro mechanics and *** existing research results show that the mechanism of nano-materials on geopolymer concrete mainly includes the filling effect,nucleation effect,and bridging effect,the appropriate amount of nano-materials can be used as fillers to reduce the porosity of geopolymer concrete,and can also react with Ca(OH)2 to produce C-S-H gel,thereby improving the mechanical properties of geopolymer *** optimum content of nano-SiO_(2) is between 1.0%and 2.0%.The optimum content of nano-CaCO_(3) is between 2.0%and 3.0%.The optimum content of carbon nanotubes is between 0.1%and 0.2%.The optimum content of nano-Al_(2)O_(3) is between 1.0%and 2.0%.The main problems existing in the research and application of nanomaterial-modified geopolymer concrete are summarized,which lays a foundation for the further application of nanomaterial in geopolymer concrete.

关键词： nanomaterials low carbon geopolymer concrete macro-mechanics microstructure

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IoT Empowered Early Warning of Transmission Line Galloping Based on Integrated Optical Fiber Sensing and Weather Forecast Time Series Data

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Computers, Materials & Continua 2025年第1期82卷 1171-1192页

作者： Zhe Li Yun Liang Jinyu Wang Yang gao State Grid Henan Electric Power Company Electric Power Scientific Research Institute State Grid Henan Electric Power CompanyZhengzhou450052China

Iced transmission line galloping poses a significant threat to the safety and reliability of power systems,leading directly to line tripping,disconnections,and power *** early warning methods of iced transmission line galloping suffer from issues such as reliance on a single data source,neglect of irregular time series,and lack of attention-based closed-loop feedback,resulting in high rates of missed and false *** address these challenges,we propose an Internet of Things(IoT)empowered early warning method of transmission line galloping that integrates time series data from optical fiber sensing and weather ***,the method applies a primary adaptive weighted fusion to the IoT empowered optical fiber real-time sensing data and weather forecast data,followed by a secondary fusion based on a Back Propagation(BP)neural network,and uses the K-medoids algorithm for clustering the fused ***,an adaptive irregular time series perception adjustment module is introduced into the traditional Gated Recurrent Unit(GRU)network,and closed-loop feedback based on attentionmechanism is employed to update network parameters through gradient feedback of the loss function,enabling closed-loop training and time series data prediction of the GRU network ***,considering various types of prediction data and the duration of icing,an iced transmission line galloping risk coefficient is established,and warnings are categorized based on this ***,using an IoT-driven realistic dataset of iced transmission line galloping,the effectiveness of the proposed method is validated through multi-dimensional simulation scenarios.

关键词： Optical fiber sensing multi-source data fusion early warning of galloping time series data IoT adaptive weighted learning irregular time series perception closed-loop attention mechanism

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