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Divalent anion intercalation and etching-hydrolysis strategies to construct ultra-stable electrodes for seawater splitting

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Science China Chemistry 2024年第2期67卷 687-695页

作者： Jiajia Lu Yang Liu han-pu Liang Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao266101China Henan Provincial Key Laboratory of Nanocomposites and Applications Institute of Nano-Structured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou450006China School of Materials Science and Engineering Henan Normal UniversityXinxiang453007China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Shandong Energy Institute Qingdao266101China

Developing stable electrodes for seawater splitting remains a great challenge due to the detachment of catalysts at a large operating current and severe anode corrosion caused by ***,divalent anion intercalation and etching-hydrolysis strategies are deployed to synthesize the ultra-stable anode,dendritic Fe(OH)_(3) grown on Ni(SO_4)_(0.3)(OH)_(1.4)–Ni(OH)_(2).Experimental results reveal that the anode exhibits good activity and excellent stability in alkaline simulated *** 500 h,the current density operated at 1.72 V remains 99.5%,about 210 m A cm^(-2).The outstanding stability originates from the etchinghydrolysis strategy,which strengthens the interaction between the catalyst and the carrier and retards thus the detachment of catalysts at a large current ***,theoretical simulations confirm that the intercalated divalent anions,such as SO_4^(2-) and CO_(3)^(2-),can weaken the adsorption strength of chlorine on the surface of catalysts and hinder the coupling and hybridization between chlorine and nickel,which slows down the anode corrosion and improves catalytic ***,the twoelectrode system shows the remarkable 95.1% energy efficiency at 2,000 A m-2and outstanding stability in 6 mol L^(-1) KOH +seawater at 80 ℃.

关键词： seawater splitting stability divalent anion intercalation etching-hydrolysis

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Three-dimensional spin–orbit coupled Fermi gases:Fulde–Ferrell pairing, Majorana fermions, Weyl fermions,and gapless topological superfluidity

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Chinese Physics B 2015年第5期24卷 44-55页

作者： Xia-Ji Liu Hui Hu han pu Center for Quantum and Optical Science Swinburne University of Technology Department of Physics and Astronomy and Rice Quantum Institute Rice University Center for Cold Atom Physics Chinese Academy of Sciences

We theoretically investigate a three-dimensional Fermi gas with Rashba spin-orbit coupling in the presence of both out-of-plane and in-plane Zeeman fields. We show that, driven by a sufficiently large Zeeman field, either out-of-plane or in-plane, the superfluid phase of this system exhibits a number of interesting features, including inhomogeneous Fulde- Ferrell pairing, gapped or gapless topological order, and exotic quasi-particle excitations known as Weyl fermions that have linear energy dispersions in momentum space （i.e., massless Dirac fermions）. The topological superfluid phase can have either four or two topologically protected Weyl nodes. We present the phase diagrams at both zero and finite temperatures and discuss the possibility of their observation in an atomic Fermi gas with synthetic spin-orbit coupling. In this context, topological superfluid phase with an imperfect Rashba spin-orbit coupling is also studied.

关键词： Fulde-Ferrell superfluid topological superfluid spin-orbit coupling

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Influence of multi-factor interactions on particle growth during top-spray fluidized bed agglomeration

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Particuology 2024年第11期94卷 173-186页

作者： Chunyin Wang Jiliang Ma Jialiang Cai han pu Xiaoping Chen Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing210096China

Considering the strong dependence of agglomerate characteristics on various operating parameters,this study employs the control variable methodology(CVM)and response surface methodology(RSM)to investigate the influence of multi-factor interactions on particle growth during top-spray fluidized bed ***,CVM is conducted to assess the effects of individual operating parameters on the agglomerate properties,such as mean particle size,relative width,and ***,the interactive relationship between these input variables and the quality attributes of the process is investigated using *** results show that the mean particle size increases with the increase of binder viscosity and spray rate,while it decreases with the increase of fluidization gas velocity and inlet gas *** relative width of the particle size distribution increases with the spray rate,binder viscosity,and fluidization gas velocity,and hardly changes with the inlet gas *** mean particle size is more sensitive to the binder spray rate at a lower level of fluidization gas velocity or a higher level of inlet gas *** fluidization gas velocity corresponding to the maximum D_(50) changes when the binder viscosity and binder spray rate are at different levels.

关键词： Top-spray fluidized bed granulation Agglomeration Response surface methodology Particle size distribution

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Statistical Property and Model for the Inter-Event Time of Terrorism Attacks

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Chinese Physics Letters 2010年第6期27卷 273-276页

作者： ZHU Jun-Fang han Xiao-pu WANG Bing-Hong Department of Modern Physics University of Science and Technology of China Hefei 230026 Institute of Complex Adaptive Systems Shanghai Academy of System Science Shanghai 200093

The inter-event time of terrorism attack events is investigated by empirical data and model analysis. Empirical evidence shows that it follows a scale-free property. In order to understand the dynamic mechanism of such a statistical feature, an opinion dynamic model with a memory effect is proposed on a two-dimensional lattice network. The model mainly highlights the role of individual social conformity and self-affirmation psychology. An attack event occurs when the order parameter indicating the strength of public opposition opinion is smaller than a critical value. Ultimately, the model can reproduce the same statistical property as the empirical data and gives a good understanding for the possible dynamic mechanism of terrorism attacks.

关键词： STATISTICAL physics TERRORISM EMPIRICAL research COMpuTER storage devices CONFORMITY ELECTRONIC data processing

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Advantage of populous countries in the trends of innovation efficiency

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Chinese Physics B 2022年第6期31卷 65-73页

作者： Dan-Dan Hu Xue-Jin Fang Xiao-pu han 2 1Alibaba Research Center for Complexity SciencesHangzhou Normal UniversityHangzhou 311121China Institute of Information Economy and Alibaba Business School Hangzhou Normal UniversityHangzhou 311121China

A flurry of studies indicates that population size has a positive effect on innovation,however,cross-country empirical evidence remains *** this paper,we add to the literature by investigating the relationship between population size and innovation efficiency at the country level through constructing three relative indexes based on the datasets of patent applications and Research and Development(R&D)*** from previous studies based on absolute innovation indicators,the relative indexes can reflect the core innovation efficiency of economies by excluding the impact from the difference of economic development level,with a view putting all economies into a comparable standard *** all of the three relative indexes,their long-term trends show significant correlations with population size,and the economy with a larger population usually has better and stable performance on the trends of innovation *** addition,we find that there is a critical population size,over which the economy would be more likely to have a spontaneous improvement on innovation *** study provides direct evidence in supporting the population size advantage on the trends of innovation efficiency at the economy level and provides new insight to understand the rapid development of innovation in a few populous countries.

关键词： innovation efficiency population size the relative indexes

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Enhancement of MAD/MIR phasing at low resolution and a new procedure for automatic phase extension

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Chinese Physics B 2019年第7期28卷 389-395页

作者： pu han Yuan-Xin Gu Wei Ding Hai-Fu Fan Key Laboratory of Soft Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Physics Science University of Chinese Academy of Sciences Beijing 100049 China

To achieve de novo protein structure determination of challenging cases, multi-wavelength anomalous diffraction(MAD) and multiple isomorphous replacement(MIR) phasing can be powerful tools to obtain low-resolution initial phases from heavy-atom derivative datasets, then phase extension is needed against high-resolution data to obtain accurate *** this context, we propose a direct-methods procedure here that could improve the initial low-resolution MAD/MIR phase *** accordingly, an automated process for extending initial phases to high resolution is also *** two procedures are both implanted in the newly released IPCAS *** cases are used to perform the test, including one set of 4.17 ? MAD data from a membrane protein and two sets of MAD/MIR data with derivatives truncated down to 6.80 ? and 6.90 ?, *** the results have shown that the initial phases generated from the direct-methods procedure are better than that from the conventional MAD/MIR *** automated phase extensions for the latter two cases starting from 6.80 ? to 3.00 ? and 6.90 ? to 2.80 ? are proved to be successful, leading to complete *** may provide convenient and reliable tools for phase improvement and phase extension in difficult low-resolution tasks.

关键词： direct methods multi-wavelength anomalous diffraction(MAD)/multiple isomorphous replacement(MIR) phasing phase extension low-resolution

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Graph deep learning accelerated efficient crystal structure search and feature extraction

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npj Computational Materials 2023年第1期9卷 524-532页

作者： Chuan-Nan Li han-pu Liang Xie Zhang Zijing Lin Su-Huai Wei Department of Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China Beijing Computational Science Research Center Beijing 100193China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China

Structural search and feature extraction are a central subject in modern materials design,the efficiency of which is currently limited,but can be potentially boosted by machine learning(ML).Here,we develop an ML-based prediction-analysis framework,which includes a symmetry-based combinatorial crystal optimization program(SCCOP)and a feature additive attribution model,to significantly reduce computational costs and to extract property-related structural *** method is highly accurate and predictive,and extracts structural features from desired structures to guide materials *** first test SCCOP on 35 typical compounds to demonstrate its *** a case study,we apply our approach to a two-dimensional B-C-N system,which identifies 28 previously undiscovered stable structures out of 82 compositions;our analysis further establishes the structural features that contribute most to energy and *** to conventional approaches,SCCOP is about 10 times faster while maintaining a comparable *** framework is generally applicable to all types of systems for precise and efficient structural search,providing insights into the relationship between ML-extracted structural features and physical properties.

关键词： structural crystal precise

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Engineering FeOOH/Ni(OH)_(2) heterostructures on Ni_(3)S_(2)surface to enhance seawater splitting

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Rare Metals 2024年第5期43卷 1989-1998页

作者： Chen Yang Ya-Dong Li Li-Juan Cao Xi-Long Wang han-pu Liang Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Sino-Danish College University of Chinese Academy of SciencesBeijing 100049China

The construction of highly stable and efficient electrocatalysts is desirable for seawater splitting but remains challenging due to the high concentration of Cl-in ***,FeOOH/Ni(OH)_(2)heterostructure supported on Ni_(3)S_(2)-covered nickel foam(Fe–Ni/Ni_(3)S_(2)/NF)was fabricated by hydrothermal and etching methods,as well as anodic oxidation *** electronic structure of FeOOH and Ni(OH)_(2)could be modulated after depositing FeOOH nanoparticles on Ni(OH)_(2)nanosheet,which greatly boosted the catalytic *** the catalyst used as an electrode for oxygen evolution reaction(OER),it needed low overpotentials of 266 and 368 m V to achieve current densities of 100 and 800 m A·cm^(-2),respectively,in 1 mol·L^(-1)KOH+seawater *** can operate continuously at 100 m A·cm^(-2)for 400 h without obvious ***,in situ generated SO_(4)^(2-)from inner Ni_(3)S_(2)during electrolysis process would accumulate on the surface of active sites to form passivation layers to repel Cl^(-),which seemed to be responsible for superior *** study not only synthesizes an OER catalyst for highly selective and stable seawater splitting,but also gives a novel approach for industrial hydrogen production.

关键词： Anodic oxidation Heterostructure Oxygen evolution reaction Seawater splitting

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Studies on the binding of vinpocetine to human serum albumin by molecular spectroscopy and modeling

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Chinese Chemical Letters 2012年第5期23卷 599-602页

作者： Hua Jiang Rong Rong Chen Hong Cui Wang han Lin pu Bio-engineering Institute College of Life Science and TechnologyJinan UniversityGuangzhou 510632China

The interaction between vinpocetine（VPC） and human serum albumin（HSA） in physiological buffer（pH 7.40） was investigated by fluorescence,FT-IR,UV-vis absorption and molecular *** effectively quenched the intrinsic fluorescence of HSA via static *** binding site number n and apparent binding constant K_a,corresponding thermodynamic parametersΔG,ΔH andΔS at different temperatures were *** synchronous fluorescence and FT-IR spectra were used to investigate the structural change of HSA molecules with addition of *** modeling indicated that VPC could bind to the site I of HSA and hydrophobic interaction was the major acting force,which was in agreement with the binding mode study.

关键词： Vinpocetine Human serum albumin Fluorescence quenching Molecular modeling

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Structural Transition from Ordered to Disordered of BeZnO2 Alloy

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Chinese Physics Letters 2020年第5期37卷 81-84页

作者： Li-Xia Qin han-pu Liang Rong-Li Jiang School of Materials and Physics China University of Mining and TechnologyXuzhou 221116 School of Chemical Engineering China University of Mining and TechnologyXuzhou 221116

Employing Monte Carlo simulations based on the cluster expansion,the special quasi-random structures and first-principles calculations,we systematically investigate the structure transition of BeZnO2 alloys from the ordered to the disordered phase driven by the increased synthesis temperature,together with the solid-state phase *** is found that by controlling the ordering parameter at the mixed sublattice,the band structure can vary continuously from a wide direct band gap of 4.61 eV for the fully ordered structure to a relatively narrow direct band gap of 3.60 eV for the fully disordered ***,a better optical performance could be achieved simply by controlling the synthesis temperature,which determines the ordering parameters and thus the band gaps.

关键词： structure. BeZnO ordered

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