检索结果-南通市图书馆

Atomically precise metal nanoclusters for(photo)electroreduction of CO_(2): Recent advances, challenges and opportunities

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第6期30卷 359-370,I0009页

作者： Lubing Qin Guanyu Ma Likai Wang zhenghua tang Guangzhou Key Laboratory for Surface Chemistry of Energy Materials New Energy Research InstituteSchool of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CentreGuangzhou 510006GuangdongChina School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255049ShandongChina Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy Materials School of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CentreGuangzhou 510006GuangdongChina

To alleviate the global warming by removing excess CO_(2) and converting them into value-added chemicals,(photo)electrochemical reduction has been recognized as a promising *** the CO_(2) reduction reaction(CO_(2) RR) is involved with multiple electrons and multiple products,plus the complexity of the surface chemical environment of the catalyst,it is extremely challenging to establish the structure/function *** precise metal nanoclusters(NCs),with crystallographically resolved structure,molecule-like characters and strong quantum confinement effects,have been emerging as a new type of catalyst for CO_(2) RR,and more importantly,they can provide an ideal platform to unravel the comprehensive mechanistic insights and establish the structure/function relationship *** this review,the recent advances regarding employing molecular metal NCs with well-defined structure including Au NCs,Au-based alloy NCs,Ag NCs,Cu NCs for CO_(2) RR and relevant mechanistic studies are discussed,and the opportunities and challenges are proposed at the end for paving the development of CO_(2) RR by using atomically precise metal NCs.

关键词： Atomically precise metal nanoclusters (Photo)electroreduction of CO_(2) Structure/function relationship Theoretical calculations Advances Opportunities and challenges

Atomically precise alkynyl-protected Ag_(20)Cu_(12)nanocluster:Structure analysis and electrocatalytic performance toward nitrate reduction for NH_(3)synthesis

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第8期16卷 10867-10872页

作者： Guanyu Ma Fang Sun Liang Qiao Quanli Shen Lei Wang Qing tang zhenghua tang New Energy Research Institute School of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CentreGuangzhou 510006China School of Chemistry and Chemical Engineering Chongqing Key Laboratory of Theoretical and Computational ChemistryChongqing UniversityChongqing 401331China China Petrochemical Research Institute PetroChina Company LimitedBeijing 102206China

Electrochemical nitrate reduction reaction(NtrRR)has been emerging as an appealing route for both water treatment and NH_(3)***,we report the structure analysis and electrocatalytic performance of a novel homoleptic alkynyl-protected Ag_(20)Cu_(12)nanocluster(Ag_(20)Cu_(12)in short)with atomic precision,which has eight free electrons and displays characteristic absorbance *** crystal X-ray diffraction(SC-XRD)discloses that,it adopts a Ag_(14)kernel capped by three Ag_(2)Cu_(4)(C≡CArF)_(8)metal–ligand binding motifs in the outer ***_(20)Cu_(12)exhibited excellent catalytic performance toward NtrRR,as manifested by the superior NH_(3)Faradaic efficiency(FE,84.6%)and yield rate(0.138 mmol·h^(−1)·mg−1)than the homoleptic alkynyl-protected Ag_(32)***,it demonstrates good catalytic recycling *** functional theory(DFT)calculations revealed that,the de-ligated Ag_(20)Cu_(12)cluster can expose the available AgCu bimetallic sites as the efficient active sites for NH_(3)*** particular,the participation of Cu sites greatly facilitates the initial capture of NO_(3)−and simultaneously promotes the selectivity of the final *** study discovers a novel homoleptic alkynyl-protected AgCu superatom,and offers a great example to elucidate the structure–performance relationship of bimetallic catalyst for NtrRR and other multiple protons/electrons coupled electrocatalytic reactions.

关键词： Ag_(20)Cu_(12)nanocluster alkynyl ligand nitrate reduction reaction(NtrRR) ammonia synthesis density functional theory(DFT)calculations

A synchronous nucleation and passivation strategy for controllable synthesis of Au36(PA)24: unveiling the formation process and the role of Au22(PA)18 intermediate

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2020年第12期63卷 1777-1784页

作者： Xiaoshuang Ma Guanyu Ma Lubing Qin Guangxu Chen Shaowei Chen zhenghua tang Guangzhou Key Laboratory for Surface Chemistry of Energy Materials and New Energy Research Institute School of Environment and EnergySouth China University of TechnologyGuangzhou 510006China Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy Materials School of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CentreGuangzhou 510006China Department of Chemistry and Biochemistry University of California1156 High StreetSanta CruzCalifornia95064United States

Despite the recent progress on controllable synthesis of alkynyl-protected Au nanoclusters,the effective synthetic means are very limited and the cluster formation process still remains ***,we develop a novel synchronous nucleation and passivation strategy to fabricate Au36(PA)24(PA=phenylacetylenyl) nanoclusters with high *** Au36(PA)24formation process,Au22(PA)18as key intermediate was ***,Au22(PA)18can be synthesized under a low amount of reductant,and by employing more reductants,Au22(PA)18can turn into Au36(PA)***,the structure evolution from Au22(PA)18to Au36(PA)24is proposed,where four Au13cuboctahedra can yield one ***,the ratiocination is verified by the good accordance between the predicted intermediate/product ratio and the experimental *** study not only offers a novel synthetic strategy,but also sheds light on understanding the structural evolution process of alkynyl-protected Au nanoclusters at atomic level.

关键词： synchronous nucleation and passivation Au36(PA)24 Au22(PA)18 unveiling the formation process structure evolution intermediate/product ratio

Homoleptic alkynyl-protected Ag_(32 )nanocluster with atomic precision: Probing the ligand effect toward CO_(2) electroreduction and 4-nitrophenol reduction

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第10期15卷 8908-8913页

作者： Leyi Chen Fang Sun Quanli Shen Lubing Qin Yonggang Liu Liang Qiao Qing tang Likai Wang zhenghua tang New Energy Research Institute School of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CentreGuangzhou 510006China School of Chemistry and Chemical Engineering Chongqing Key Laboratory of Theoretical and Computational ChemistryChongqing UniversityChongqing 401331China China Petrochemical Research Institute PetroChina Company LimitedBeijing 102206China School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255049China Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications Jinan UniversityGuangzhou 510632China

We report a superatomic homoleptic alkynyl-protected Ag_(32)L_(24)(L=3,5-bis(trifluoromethylbenzene)acetylide,Ag_(32) for short)nanocluster with atomic precision,which possesses eight free ***_(32) is formed by an Ag17 core with C3 symmetry and the remaining 15 Ag atoms bond to each other and coordinate with the 24 surface *** applied as electrocatalyst for CO_(2) reduction reaction(CO_(2)RR),Ag_(32) exhibited the highest Faradaic efficiency(FE)of CO up to 96.44%at−0.8 V with hydrogen evolution being significantly suppressed in a wide potential range,meanwhile it has a reaction rate constant of 0.242 min−1 at room temperature and an activation energy of 45.21 kJ·mol−1 in catalyzing the reduction of 4-nitrophenol,both markedly superior than the thiolate and phosphine ligand co-protected Ag_(32) *** strong ligand effect was further understood by density functional theory(DFT)calculations,as it revealed that,one single ligand stripping off from the intact cluster can create the undercoordinated Ag atom as the catalytically active site for both clusters,but alkynyl-protected Ag_(32) nanocluster possesses a smaller energy barrier for forming the key*COOH intermediate in CO_(2)RR,and favors the adsorption of *** study not only discovers a new member of homoleptic alkynyl-protected Ag nanocluster,but also highlights the great potentials of employing alkynyl-protected Ag nanoclusters as bifunctional catalysts toward various reactions.

关键词： Ag_(32)nanocluster,alkynyl ligand,ligand effect,CO_(2)electroreduction,4-nitrophenol reduction

Hollow Nanocages of Ni_(x)Co_(1-x)Se for Efficient Zinc–Air Batteries and Overall Water Splitting

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2019年第2期11卷 140-156页

作者： Zhengxin Qian Yinghuan Chen zhenghua tang Zhen Liu Xiufang Wang Yong Tian Wei Gao School of Pharmacy Guangdong Pharmaceutical UniversityGuangzhou 510006GuangdongPeople’s Republic of China Guangzhou Key Laboratory for Surface Chemistry of Energy Materials New Energy Research InstituteSchool of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006GuangdongPeople’s Republic of China Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy Materials School of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CentreGuangzhou 510006GuangdongPeople’s Republic of China Department of Physics and Engineering Frostburg State UniversityFrostburgMD 21532_2303USA

Developing Earth-abundant,highly efficient,and anticorrosion electrocatalysts to boost the oxygen evolution reaction(OER),oxygen reduction reaction(ORR),and hydrogen evolution reaction(HER) for the Zn–air battery(ZAB) and for overall water splitting is *** this study,a novel process starting with Cu2O cubes was developed to fabricate hollow NixCo1-xSe nanocages as trifunctional electrocatalysts for the OER,ORR,and HER and a reasonable formation mechanism was *** Ni0.2Co0.8Se nanocages exhibited higher OER activity than its counterparts with the low overpotential of 280 mV at 10 mA *** also outperformed the other samples in the HER test with a low overpotential of 73 mV at 10 mA *** an air–cathode of a self-assembled rechargeable ZAB,it exhibited good performance,such as an ultralong cycling lifetime of > 50 h,a high round-trip efficiency of 60.86%,and a high power density of 223.5 mW *** the application in self-made all-solid-state ZAB,it also demonstrated excellent performance with a power density of 41.03 mW cm-2 and an open-circuit voltage of 1.428 *** addition,Ni0.2Co0.8Se nanocages had superior performance in a practical overall water splitting,in which only 1.592 V was needed to achieve a current density of 10 mA *** results show that hollow NixCo1-xSe nanocages with an optimized Ni-to-Co ratio are a promising cost-effective and high-efficiency electrocatalyst for ZABs and overall water splitting in alkaline solutions.

关键词： Ni_(x)Co_(1-x)Se hollow nanocages Oxygen evolution reaction Hydrogen evolution reaction Rechargeable/all-solid-state zinc-air battery Overall water splitting

Multiplex detection of KRAS and BRAF mutations using cationic conjugated polymers

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2013年第8期58卷 873-878页

作者： XING BaoLing SONG JinZhao GE SuMei tang zhenghua LIU MengLu YANG Qiong Lü FengTing LIU LiBing WANG Shu Department of Pathology Changzhou Wommen and Children Health Hospital Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences

The mutation detections of KRAS and BRAF genes are of significant importance to predict the responses to anti-cancer therapy and develop new drugs. In this paper, we developed a multi-step fluorescence resonance energy transfer (FRET) assay for multiplex detection of KRAS and BRAF mutations using cationic conjugated polymers (CCP). The newly established detection system could detect as low as 2% mutant DNAs in DNA admixtures. By triggering the emission intensity change of CCP and the dyes labeled in the DNA, four possible statuses (three mutations and one wildtype) can be differentiated in one extension reaction. The detection efficiency of this new method in clinical molecular diagnosis was validated by determining KRAS and BRAF mutations of 51 formalin-fixed paraffin-embedded (FFPE) ovary tissue samples. Furthermore, the result of the CCP-based multi-step FRET assay can be directly visualized under UV light so that no expensive instruments and technical expertise are needed. Thus, the assay provides a sensitive, reliable, cost-effective and simple method for the detection of disease-related gene mutations.

关键词：基因突变检测共轭聚合物阳离子多重荧光共振能量转移中国共产党 DNA FRET

在线全文

学校读者我要写书评

暂无评论

江西省喀斯特地貌2种新植物记录

江西科学 2024年第2期42卷 249-251页

作者：杨东汤正华邱相东梁跃龙谢宜飞廖海红崇义县章江源省级自然保护区管理站江西赣州341300 龙南市林业局江西赣州341700 赣南师范大学生命科学学院、南岭资源植物保护与利用赣州市重点实验室江西赣州341000 江西九连山国家级自然保护区管理局江西赣州341700

报道了江西省种子植物1新记录属2新记录种,新记录属为九里香属(Murraya *** ex L.),新记录种为九里香(Murraya exotica ***.)、大齿报春苣苔(Primulina juliae(Hance)Mich.Möller&***)。标本均采集自江西喀斯特地貌区,标本均存放于赣南... 详细信息

报道了江西省种子植物1新记录属2新记录种,新记录属为九里香属(Murraya *** ex L.),新记录种为九里香(Murraya exotica ***.)、大齿报春苣苔(Primulina juliae(Hance)Mich.Möller&***)。标本均采集自江西喀斯特地貌区,标本均存放于赣南师范大学南岭植物标本馆(GNNU)。

关键词：江西省种子植物新记录喀斯特地貌

维普期刊数据库博看期刊

在线全文

学校读者我要写书评

暂无评论

银钟花一年生实生苗生长规律观测分析

温带林业研究 2024年第3期7卷 57-60页

作者：廖海红郭昌庆郭建寰汤正华梁跃龙段九东江西省九连山国家自然保护区管理局江西龙南341700 江西省林业科技实验中心江西信丰341600 江西省龙南市林业局江西龙南341700 江西省石城县林业局江西石城342700

【目的】探究银钟花1年生播种苗的生长规律,为培育高质量的苗木提供依据。【方法】以银钟花1年生播种苗为研究对象,测定其种子粒重、净度,温水浸种,测定其场圃发芽率、苗木生长节律、生物量,用SPSS软件建立模拟方程。【结果】银钟花种... 详细信息

【目的】探究银钟花1年生播种苗的生长规律,为培育高质量的苗木提供依据。【方法】以银钟花1年生播种苗为研究对象,测定其种子粒重、净度,温水浸种,测定其场圃发芽率、苗木生长节律、生物量,用SPSS软件建立模拟方程。【结果】银钟花种子千粒重为216.7 g、净度99.59%,播种后第2年才发芽,具有深休眠性,场圃发芽率为31%,1年生幼苗生长过程中苗高和地径均呈“S”型生长,地上部分生物量:地下部分生物量=1:0.84,地上生物量相对较大,根系发达。用SPSS软件回归拟合,得出其苗高、地径与生长时间的曲线方程关系式,可以较好的模拟估算出银钟花实生苗在其生长周期内某一时间点的苗高和地径。【结论】根据银钟花一年生播种苗的实际观测值和生长动态模拟,银钟花1年生实生苗的生长期可划分为4个时期,银钟花生长过程中出现2次生长高峰,分别在6月中下旬和8月中下旬,因此在这两个关键时间段内,应加强水肥管理,满足苗木旺盛生长所需的营养条件,促进健壮生长。

关键词：银钟花实生苗生长规律模拟方程

Unravelling the Formation Mechanism of Alkynyl Protected Gold Clusters: A Case Study of Phenylacetylene Stabilized Au133 Molecules

在线全文

学校读者我要写书评

暂无评论

Unravelling the Formation Mechanism of Alkynyl Protected Gol...