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Surface-defective FeS2 for electrochemical NH3 production under ambient conditions

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Nano Materials Science 2020年第2期2卷 132-139页

作者： daming feng Xu Zhang Ying Sun Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced MaterialsCollege of ChemistryLiaoning UniversityShenyang110036China Discipline of Chemistry University of NewcastleCallaghanNSW2308Australia

In the viewpoint of ammonia economy,electrochemical N2 reduction reaction(NRR)under mild condition is a very promising approach for sustainable *** virtue of robust activity and low cost,transition-metalbased materials become one kind of the most attractive electrocatalysts in realizing ammonia synthesis to the industrial ***,the investigation related to NRR electrocatalysts still mainly rely on costly substance or fabrication process,which greatly restrict their large-scale *** this work,a simple fabricated FeS2 electrode is adopted as NRR *** abundant surface defects due to the existence of Cr element,as well as the synergistic effect between FeS2 crystal planes provided excellent electrocatalytic performance with a high NH3 yield rate(11.5μg h^-1mg^-1 Fe)and Faradaic efficiency(14.6%)at-0.2 V *** hydrogen electrode(RHE)toward NRR under ambient *** superior catalytic performance of such non-precious metal catalysts would strongly promote the application of NRR process industrially.

关键词： Surface defects Electrocatalysis Ammonia synthesis

LUCC and its spatial expansion in frontier zone of the Longitudinal Range-Gorge Region

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Chinese Science Bulletin 2007年第A2期52卷 98-105页

作者： GAN Shu HE daming feng Yan DENG QingYan CHEN WenHua Asian Intemational Rivers Center of Yunnan University Kunming 650091 China

我们作为学习区域选择了纵的范围峡区域( LRGR )的边疆地区，基于遥感和普通调查方法，使用的空间信息处理技术和分析方法得到的另外的相关信息监视的 LUCC 的数据收集，并且探索了 LUCC 风景“在这个特殊区域的 s 特征和它的空间扩大... 详细信息

我们作为学习区域选择了纵的范围峡区域( LRGR )的边疆地区，基于遥感和普通调查方法，使用的空间信息处理技术和分析方法得到的另外的相关信息监视的 LUCC 的数据收集，并且探索了 LUCC 风景“在这个特殊区域的 s 特征和它的空间扩大效果。这研究的目的是发现风景模式和它的变化趋势，并且在 LRGR 的边疆地区为生态学安全管理提供背景资料。主要结果如下：在森林作为风景矩阵是占优势的盖子类型的学习区域展览的 LUCC 模式，当另外的类型是补丁或马赛克元素时……在这个模式下面，因为在有时间变化的不同类型的转变，他们被自然环境状况，或由人的行动影响。所有当考虑他们天赋的不同层次时，沿着 LRGR 的边疆地区的县或城市，环境调节，社会经济发展地位和管理举止，证明 LUCC 空间扩大模式具有与仅仅认为距离是长度抵抗的不同的分区集聚特征。

关键词：纵向岭谷区空间延伸边境地区分析方法

MOF‐derived 1D/3D N‐doped porous carbon for spatially confined electrochemical CO_(2) reduction to adjustable syngas

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Carbon Energy 2024年第8期6卷 1-13页

作者： Wei Zhang Hui Li daming feng Chenglin Wu Chenghua Sun Baohua Jia Xue Liu Tianyi Ma Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials Institute of Clean Energy ChemistryCollege of ChemistryLiaoning UniversityShenyangLiaoningChina School of Science RMIT UniversityMelbourneVictoriaAustralia School of Pharmaceutical and Chemical Engineering Taizhou UniversityTaizhouZhejiangChina Department of Chemistry and Biotechnology Swinburne University of TechnologyHawthornVictoriaAustralia

Electrochemical reduction of CO_(2) to syngas(CO and H_(2))offers an efficient way to mitigate carbon emissions and store intermittent renewable energy in ***,the hierarchical one‐dimensional/three‐dimensional nitrogen‐doped porous carbon(1D/3D NPC)is prepared by carbonizing the composite of Zn‐MOF‐74 crystals in situ grown on a commercial melamine sponge(MS),for electrochemical CO_(2) reduction reaction(CO_(2)RR).The 1D/3D NPC exhibits a high CO/H_(2) ratio(5.06)and CO yield(31 mmol g^(−1)h^(−1))at−0.55 V,which are 13.7 times and 21.4 times those of 1D porous carbon(derived from Zn‐MOF‐74)and N‐doped carbon(carbonized by MS),*** is attributed to the unique spatial environment of 1D/3D NPC,which increases the adsorption capacity of CO_(2) and promotes electron transfer from the 3D N‐doped carbon framework to 1D carbon,improving the reaction kinetics of CO_(2)*** results and charge density difference plots indicate that the active site of CO_(2)RR is the positively charged carbon atom adjacent to graphitic N on 1D carbon and the active site of HER is the pyridinic N on 1D *** presence of pyridinic N and pyrrolic N reduces the number of electron transfer,decreasing the reaction kinetics and the activity of CO_(2)*** CO/H_(2) ratio is related to the distribution of N species and the specific surface area,which are determined by the degree of spatial confinement *** CO/H_(2) ratios can be regulated by adjusting the carbonization temperature to adjust the degree of spatial confinement *** the low cost of feedstock and easy strategy,1D/3D NPC catalysts have great potential for industrial application.

关键词： electrochemical CO_(2)reduction reaction melamine sponge metal‐organic frameworks porous carbon syngas

Bismuth-Based Free-Standing Electrodes for Ambient-Condition Ammonia Production in Neutral Media

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Nano-Micro Letters 2020年第10期12卷 164-175页

作者： Ying Sun Zizhao Deng Xi‑Ming Song Hui Li Zihang Huang Qin Zhao daming feng Wei Zhang Zhaoqing Liu Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced MaterialsCollege of ChemistryLiaoning UniversityShenyang 110036People’s Republic of China Discipline of Chemistry University of NewcastleCallaghanNSW 2308Australia Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials College of ChemistryLiaoning UniversityShenyang 110036People’s Republic of China School of Chemistry and Chemical Engineering Guangzhou Key Laboratory for Environmentally Functional Materials and TechnologyGuangzhou UniversityGuangzhou 510006People’s Republic of China

Electrocatalytic nitrogen reduction reaction is a carbon-free and energy-saving strategy for efficient synthesis of ammonia under ambient ***,we report the synthesis of nanosized Bi2O3 particles grown on functionalized exfoliated graphene(Bi2O3/FEG)via a facile electrochemical deposition *** obtained free-standing Bi2O3/FEG achieves a high Faradaic efficiency of 11.2%and a large NH3 yield of 4.21±0.14μgNH3 h^-1 cm^-2 at-0.5 V versus reversible hydrogen electrode in 0.1 M Na2SO4,better than that in the strong acidic and basic *** from its strong interaction of Bi 6p band with the N2p orbitals,binder-free characteristic,and facile electron transfer,Bi2O3/FEG achieves superior catalytic performance and excellent long-term stability as compared with most of the previous reported *** study is significant to design low-cost,high-efficient Bi-based electrocatalysts for electrochemical ammonia synthesis.

关键词： N2 reduction Bi2O3 nanoplate Electrocatalysis Free-standing

Circular RNA circ_0003609 ameliorates hypertrophied ligamentum flavum by regulating the miR-155/SIRT1 axis

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BIOCELL 2024年第6期48卷 1001-1008页

作者： GUIBIN ZHONG SHURONG WANG YUJIN HE daming feng KE WEI YANQIU YANG JIANWEI CHEN JUNLING CHEN Department of Orthopaedics Baoshan BranchRen Ji HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghai200444China Department of Orthopaedics Ren Ji HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghai200127China Department of Operation and Anaesthesia Ren Ji HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghai200127China Department of Orthopaedics Huai Yuan Chang Jiu HospitalHuaiyuan233499China

Background:Hypertrophy of the ligamentumﬂavum(HLF)is a common contributor to spinal stenosis which results in signiﬁcant neurological *** RNA(circRNA)circ_0003609 has been linked to HLF;however,the exact mechanism by which it causes this disease is ***:Circ_0003609 expressions were regulated in HLF cells by overexpression vectors and RNA *** proliferation andﬁbrosis-related gene expression were checked by the Cell Counting Kit-8(CCK-8)assay and western ***’s prediction of the association between miR-155 and circ_0003609 was supported by a dual-luciferase reporter *** function of the miR-155/sirtuin 1(SIRT1)axis in controlling HLFﬁbrosis was further ***:Overexpression of circ_0003609 suppressed HLF cell propagation andﬁbrosis compared to its *** was found that circ_0003609 served as the sponge for miR-155 and that the circ_0003609/miR-155 axis controlled theﬁbrosis of HLF *** was found that circ_0003609 acted as a sponge for miR-155,regulating theﬁbrosis of HLF ***,miR-155 targets SIRT1,and the miR-155/SIRT1 axis promotes HLF cellﬁ***:Circ_0003609 ameliorates hypertrophied ligamentumﬂavum(LF)by modulating the miR-155/SIRT1 axis,indicating a potential treatment approach for HLF.

关键词： Circular RNA Circ_0003609 Hypertrophy of ligamentum flavum MiR-155 Sirtuin 1 Fibrosis

The Existence of the Negative Charge of Gold in Sulphide Minerals and Its Formation Mechanism

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Acta Geologica Sinica(English Edition) 1995年第3期69卷 303-315,341页

作者： Li Jiuling, feng daming, Qi feng and Zhang Guilan Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing Beijing U niversity of Science and Engineering, Beijing Fei Zhenbi Institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing Beijing University of Science and Engineering Beijing

Through a study, particularly an X-ray photoelectron spectroscopy (XPS or ESCA) analysis, of gold-bearing arsenopyrite and pyrite in Carlin-type gold deposits of Guangxi, China, and hydrothermally synthesized gold-bearing pyrite and marcasite, the authors have found that these minerals contain 'invisible gold' whose binding energy is lower than that of native gold (Au°). Therefore they suggest that gold occurs in a negative charge state in these sulphide minerals as it replaces some sulphur and is combined with sulphur with the covalent bond. This paper also preliminarily discusses the possibility of its formation from the chemistry and geochemistry of gold, crystal chemistry of arsenopyrite, pyrite and marcasite and geochemical environment.

关键词： Carlin-type gold deposit sulphide invisible gold chemical bound gold negative charge of gold

中国教育管理国际传播策略之改进——基于知识源视角的分析

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中国教育学刊 2019年第11期 62-66,75页

作者：冯大鸣华东师范大学教育学部

中国教育管理领域在国际发文数快速增长的同时正进入一个国际传播的瓶颈期。导致传播瓶颈的原因虽纷繁复杂,但若从中国教育管理知识源角度分析,主要在于对中国教育管理遗产的浅表性解读、对西方教育管理知识的低创意利用、对苏联教育管... 详细信息

中国教育管理领域在国际发文数快速增长的同时正进入一个国际传播的瓶颈期。导致传播瓶颈的原因虽纷繁复杂,但若从中国教育管理知识源角度分析,主要在于对中国教育管理遗产的浅表性解读、对西方教育管理知识的低创意利用、对苏联教育管理知识的"失源性"阐释以及对党的领导工作智慧的存而不论等传播缺陷。改进中国教育管理的国际传播策略,则可在深一层揭示、互惠式研究、整全性阐释和有证据的说明等四个方面用力。

关键词：教育管理国际传播知识源

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港台两地教育改革的主标落空及个中教益

湖南师范大学教育科学学报 2017年第5期16卷 11-16页

作者：冯大鸣华东师范大学基础教育改革与发展研究所上海200062

港台两地的教改(教育改革)抱着革故鼎新的追求起步,教改的配置也几近完美,然而结果却是教改的主攻目标未能达成,甚至还派生出一系列新的棘手问题。两地教改主攻目标落空的过程与事实,至少给我们留下了可资借鉴的四条教益:理想的教改目... 详细信息

港台两地的教改(教育改革)抱着革故鼎新的追求起步,教改的配置也几近完美,然而结果却是教改的主攻目标未能达成,甚至还派生出一系列新的棘手问题。两地教改主攻目标落空的过程与事实,至少给我们留下了可资借鉴的四条教益:理想的教改目标往往知易行难,与本土文化"决裂"的教改难以成功,没有不知疲倦的教师和无所不能的培训,世上几乎没有有利无弊的教改举措。

关键词：教育改革香港台湾地区教益

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西方国家新型课堂布局及其对课程改革的启示

上海教育科研 2006年第6期 23-25页

作者：冯大鸣华东师范大学教育管理学系 200062

我国近年新建的学校虽已融入了不少新创意,但在课堂布局上仍沿用离散性的模式,限制了课堂布局对课程改革的应有贡献。西方新型课堂布局的学习空间相互沟通与群组整合给我们带来新的启发。

关键词：课程改革西方国家相互沟通学习空间课堂布局离散性模式