检索结果-南通市图书馆

Tandem electrocatalytic nitrate reduction reaction

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2023年第8期42卷 8-10页

作者： Chuanfei Cang haoquan zheng Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'an710119China

Haber-Bosch process is the main industrial procedure to produce ammonia(NH_(3)),but it requires harsh conditions,such as high temperature and high pressure and relies on non-renewable fossil *** comparison,electrochemical nitrogen(N_(2))or nitrate(NO_(3)^(-))reduction reaction to NH_(3) is a green and energy-efficient way,which has recently attached much ***,the reaction has multi-step electron/proton transfers and multiple intermediates during reaction,such as NO_(2)^(-),N_(2)H_(4),NH_(2)OH,N_(2),etc.,which gives rise to slow reaction kinetics,low activity and poor selectivity[1].It is important to design new electrocatalysts with high selectivity and high Faraday efficiency.

关键词： energy. nitrate selectivity

Surfactant-metal-organic framework complexes and their derivatives:advances in electrocatalysis

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 2024年第10期67卷 3209-3222页

作者： Yining Liu Mengying Wang Zuozhong Liang haoquan zheng Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China

Metal-organic frameworks(MOFs)and their derivatives received more and more attention due to the diverse morphologies,rich porous structures,and tunable metal active sites,which have been widely used in energy-related electrocatalytic ***,a class of compounds with hydrophilic and hydrophobic portions in the molecular structure,are able to modulate the properties of liquid and solid *** play a crucial role in controlling the shape and size of MOFs,which helps optimize electrocatalytic performance,especially in improving the exposure and accessibility of catalytic active *** this review,we first outline the types and applications of ***,we describe the interface modulation and reaction mechanism of different surfactants during the forming of MOFs and their ***,we discuss the current applications of surfactant-modified MOFs and their derivatives in *** review provides a better understanding of surfactantassistant structure regulation and electrocatalytic activity study of MOFs and their derivatives.

关键词： metal-organic frameworks surfactants interface modulation electrocatalysis

Anion engineering of hierarchical Co-A(A=O,Se,P) hexagrams for efficient electrocatalytic oxygen evolution reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第10期32卷 3241-3244页

作者： Zuozhong Liang Chenxi Yang Wei Zhang haoquan zheng Rui Cao Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China Sinopec Beijing Research Institute of Chemical Industry Beijing 100013China

Water electrolysis is considered to be an effective and promising technology to make high-purity H_(2),however,the relationship between anion species and catalytic performance of electrocatalysts is still not completely ***,we report an anion engineering strategy to tune electrocatalytic water oxidation activity for Co-based *** hierarchical Co-based oxide/selenide/phosphide(Co-A,A = O,Se,P)hexagrams have been chosen as model *** results and theoretical calculations reveal that the electron configuration,the electrical conductivity,and the oxidation potential of Co element in Co-A hexagrams could be moderated by the substitution of P atoms,which leads to the superior OER ***,Co-P hexagram displays a low overpotential(η = 269 mV) at j = 10 mA/cm^(2) for the oxygen evolution reaction(OER) compared to Co-O hexagram(η = 399 m V) and Co-Se hexagram(η = 347 mV).This work is of great importance in understanding coordination atoms(O,Se and P)induced electrocatalytic properties of hierarchical Co-based materials.

关键词： OER Anion engineering CoP CoSe_(2) Co_(3)O_(4)

Cobalt porphyrins supported on carbon nanotubes as model catalysts of metal-N_(4)/C sites for oxygen electrocatalysis

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第2期30卷 77-81,I0003页

作者： Haonan Qin Yanzhi Wang Bin Wang Xiaoguang Duan Haitao Lei Xuepeng Zhang haoquan zheng Wei Zhang Rui Cao Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'an 710119.ShaanxiChina School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaide 5005SAAustralid

Transition-metal based M-N_4/C catalysts are appealing for electrocatalytic oxygen reduction reaction(ORR) and oxygen evolution reaction(OER). Employing model catalysts, which have well-defined molecular structures and coordination environments, to investigate electrocatalytic performance of M-N_4/C sites for ORR and OER is of fundamental significance. Herein, we reported the use of Co tetra(phenyl)porphyrin 1 and Co tetra(pentafluorophenyl)porphyrin 2 as models to probe the role of Co-N_4/C sites for oxygen electrocatalysis. We showed that Co porphyrin 1 is more efficient than its structural analogue 2 for oxygen electrocatalysis in alkaline aqueous solutions, indicating that the electronrich Co-N_4/C site is more favored when noncovalently adsorbed on carbon supports. This work inspires rational design of reaction-oriented catalysts for sustainable energy storage and conversion technologies.

关键词： Molecular electrocatalysis Model catalyst Oxygen evolution reaction Oxygen reduction reaction Porphyrin

Substituent position effect of Co porphyrin on oxygen electrocatalysis

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第9期32卷 2841-2845页

作者： Haoyuan Lv Hongbo Guo Kai Guo Haitao Lei Wei Zhang haoquan zheng Zuozhong Liang Rui Cao Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China

Substituent effect of metal porphyrin molecular catalysts plays a crucial role in determining the catalytic activity of oxygen ***,substituent position effect of Co porphyrins on oxygen electrocatalysis,including the oxygen reduction reaction(ORR)and the oxygen evolution reaction(OER),was *** Co porphyrins,namely 2,4,6-OMe-CoP and 3,4,5-OMe-CoP,were selected as the research *** ORR and OER performance was evaluated by drop-coating molecular catalysts on carbon nanotubes(CNTs).The resulted 3,4,5-OMe-CoP/CNT exhibited high bifunctional electrocatalytic activities and better long-term stability for both ORR and OER than 2,4,6-OMe-CoP/***,when applied in the Zn-air battery,3,4,5-OMe-CoP/CNT exhibited comparable performance to that with precious metal-based *** enhanced catalytic activity may be attributed to the improved charge transfer rate,mass transfer and *** work provides an effective strategy to further enhance catalytic activity by introducing substituent position effect,which is of great importance for developing more efficient energy-related electrocatalysts.

关键词： Oxygen electrocatalysis Oxygen reduction reaction Oxygen evolution reaction Co porphyrin Substituent effect

Preface to Inorganic Catalysts

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2023年第8期42卷 I0001-I0002页

作者： haoquan zheng Haiping Lin Qing Li Yu Chen Shaanxi Normal University Xi'anChina

Exploring and developing renewable energy conversion devices has become one of the efficient solutions for energy crises and environmental ***-and photo-catalysis is recognized as a practical process for chemical energy conversion,which has attracted considerable research efforts in the design and development of high-performing electrocatalysts in recent *** development of new methods to prepare inorganic heterogeneous materials has extended the limits of functional material synthesis for the diverse fields of electro-and *** special issue will review and present the latest developments in inorganic heterogeneous catalysts for electro-and *** believe that this special issue will contribute to the rational design and synthesis of inorganic heterogeneous catalysts,the applications in various reactions,and the in-depth understanding of the relationship between structure and activity.

关键词： inorganic synthesis rational

Inherent mass transfer engineering of a Co,N co-doped carbon material towards oxygen reduction reaction

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

Journal of Energy Chemistry 2021年第7期30卷 391-396页

作者： Yanzhi Wang Bin Wang Haitao Yuan Zuozhong Liang Zhehao Huang Yuye Zhou Wei Zhang haoquan zheng Rui Cao Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina Department of Materials and Environmental Chemistry Stockholm UniversityStockholm SE-10691Sweden KTH Royal Institute of Technology School of Engineering Sciences in ChemistryBiotechnology and HealthDepartment of ChemistryDivision of Applied Physical ChemistryAnalytical ChemistryStockholm SE-10044Sweden

Oxygen reduction reaction (ORR) is an important process for the conversion and utilization of a wide range of renewable energy sources, and is critical for the shape of future energy scenario [1–10]. However, ORR is a complex four-electron transfer process and is kinetically sluggish. It is urgent to develop high-efficient electrocatalysts to solve this problem [11–15]. Up to now, precious metal-based catalysts such as Pt-based electrocatalysts have been widely studied and found to be one of the most efficient electrocatalysts for ORR. However, the high price and the small reserves limit their large-scale commercialization [10,16–23]. Therefore, in order to fulfill needs for the practical applications, it is necessary to develop low-cost electrocatalysts, also with high activity and great stability [19,24–28].

关键词： Co,N co-doped porous carbon Electrocatalysis Oxygen reduction reaction Zn-air battery

Mononuclear first-row transition-metal complexes as molecular catalysts for water oxidation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2018年第2期39卷 228-244页

作者： Ni Wang haoquan zheng Wei Zhang Rui Cao Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi’an 710119 Shaanxi China Department of Chemistry Renmin University of China Beijing 100872 China

Water oxidation is significant in both natural and artificial *** nature,water oxidation occurs at the oxygen‐evolving center of photosystem II,and leads to the generation of oxygen,protons,and *** last two are used for fixation of carbon dioxide to give *** artificial processes,the coupling of water oxidation to evolve O2and water reduction to evolve H2is known as water splitting,which is an attractive method for solar energy conversion and *** water oxidation is a thermodynamically uphill reaction and is kinetically slow,this reaction causes a bottleneck in large‐scale water *** a consequence,the development of new and efficient water oxidation catalysts(WOCs)has attracted extensive *** efforts have identified a variety of mononuclear earth‐abundant transition‐metal complexes as active and stable molecular *** review article summarizes recent progress in research on mononuclear catalysts that are based on first‐row transition‐metal elements,namely manganese,iron,cobalt,nickel,and *** attention is paid to catalytic mechanisms and the key O?O bond formation *** information is critical for designing new catalysts that are highly efficient and stable.

关键词： Water oxidation O-O bond formation Oxygen evolution First‐row transition metal Electrocatalysis

O-O bond formation mechanisms during the oxygen evolution reaction over synthetic molecular catalysts

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2021年第8期42卷 1253-1268页

作者： Xue-Peng Zhang Hong-Yan Wang haoquan zheng Wei Zhang Rui Cao Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina

Water oxidation is one of the most important reactions in natural and artificial energy conversion *** nature,solar energy is converted to chemical energy via water oxidation at the oxygen-evolving center of photosystem II to generate dioxygen,protons,and *** artificial energy schemes,water oxidation is one of the half reactions of water splitting,which is an appealing strategy for energy conversion via photocatalytic,electrocatalytic,or photoelectrocatalytic *** it is thermodynamically unfavorable and kinetically slow,water oxidation is the bottleneck for achieving large-scale water ***,developing highly efficient water oxidation catalysts has attracted the interests of researchers in the past *** formation of O-O bonds is typically the rate-determining step of the water oxidation catalytic ***,better understanding this key step is critical for the rational design of more efficient *** review focuses on elucidating the evolution of metal-oxygen species during transition metal-catalyzed water oxidation,and more importantly,on discussing the feasible O-O bond formation mechanisms during the oxygen evolution reaction over synthetic molecular catalysts.

关键词： Oxygen evolution reaction Water oxidation O-O bond formation Transition metal complex Molecular electrocatalysis Reaction mechanism

同方期刊数据库