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Journal of Energy Chemistry 2019年第1期28卷 73-78页

作者： Lijie Hou jianing guo Zhonghua Xiang State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology

For the sake of accelerating the commercial application of fuel cells, non-noble metal catalysts with high activity and high stability have been widely developed to replace platinum-based catalysts. Here, we report a simple but cost-effective synthetic strategy using iron tetra-amino phthalocyanine(FePC-NH_2)and modified carbon black(HCB) to obtain a novel oxygen reduction electrocatalyst(named as FePCNH_2/HCB-800) with Fe_2O_3 wrapped in nitrogen-doped carbon(N-carbon) as active site. The HCB as template can effectively promotes the formation of Fe_2O_3 active site in the catalysts. Compared to commercial Pt/C catalyst, the Fe PC-NH_2/HCB-800 catalyst exhibits high electrocatalytic activity for oxygen reduction reaction(ORR) with onset potential of 0.98 V and half-wave potential with 0.84 V vs. reversible hydrogen electrode(RHE). Meanwhile, the catalyst also shows excellent circulation stability. We believe that this work provides a platform for ORR and is conducive to the commercialization of fuel cells and metal-air batteries.

关键词： Oxygen reduction reaction Iron tetra-amino phthalocyanine Fuel cell Electrocatalyst

Degradation and its fast recovery in a-IGZO thin-film transistors under negative gate bias stress

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Chinese Physics B 2021年第11期30卷 610-617页

作者： jianing guo Dongli Zhang Mingxiang Wang Huaisheng Wang School of Electronic and Information Engineering Soochow UniversitySuzhou 215006China

A new type of degradation phenomena featured with increased subthreshold swing and threshold voltage after negative gate bias stress(NBS)is observed for amorphous InGaZnO(a-IGZO)thin-film transistors(TFTs),which can recover in a short *** comparing with the degradation phenomena under negative bias illumination stress(NBIS),positive bias stress(PBS),and positive bias illumination stress(PBIS),degradation mechanisms under NBS is proposed to be the generation of singly charged oxygen vacancies(V_(o)^(+))in addition to the commonly reported doubly charged oxygen vacancies(V_(o)^(2+)).Furthermore,the NBS degradation phenomena can only be observed when the transfer curves after NBS are measured from the negative gate bias to the positive gate bias direction due to the fast recovery of V_(o)^(+)under positive gate *** proposed degradation mechanisms are verified by TCAD simulation.

关键词： amorphous IGZO thin-film transistors negative bias stress subthreshold swing

Highly efficient iron–nitrogen electrocatalyst derived from covalent organic polymer for oxygen reduction

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Journal of Energy Chemistry 2017年第6期26卷 1168-1173页

作者： jianing guo Mengyao Ning Zhonghua Xiang State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China

Developing non-precious metal catalyst with high activity, good stability and low cost for electrocatalytic oxygen reduction reaction（ORR） is critical for the wide application of energy conversion system. Here, we developed a cost–effective synthetic strategy via silica assistance to obtain a novel FeC/Fe–N–C（named as COPBP-PB-Fe-900-SiO） catalyst with effective active sites of Fe–Nand FeC from the rational design two-dimensional covalent organic polymer（COPBP-PB）. The nitrogen-rich COP effectively promotes the formation of active Fe–Nsites. Additionally, the silica not only can effectively suppress the formation of large Fe-based particles in the catalysts, but also increases the degree of carbonization of the *** as-prepared COPBP-PB-Fe-900-SiOcatalyst exhibits high electrocatalytic activity for ORR with a halfwave potential of 0.85 V vs. reversible hydrogen electrode（RHE）, showing comparable activity as compared with the commercial Pt/C catalysts in alkaline media. Moreover, this catalyst also shows a high stability with a nearly constant onset potential and half-wave potential after 10,000 cycles. The present work is highly meaningful for developing ORR electrocatalysts toward wide applications.

关键词： Oxygen reduction reaction Electrocatalyst Covalent organic frameworks Nonprecious metal catalysts Fe–N_x

Delay-Differentiated Scheduling in Optical Packet Switches for Cloud Data Centers

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China Communications 2015年第8期12卷 22-32页

作者： LI Yaofang XIAO Jie WU Bin WEN Hong YU Hongfang YANG Shu XIN Shanshan guo jianing School of Computer Science and Technology Tianjin University Computing Center Tianjin Chengjian University National Key Laboratory on Communications University of Science and Technology of China School of Communication Engineering University of Electronic Science and Technology of China

We consider differentiated timecritical task scheduling in a N×N input queued optical packet s w itch to ens ure 100% throughput and meet different delay requirements among various modules of data center. Existing schemes either consider slot-by-slot scheduling with queue depth serving as the delay metric or assume that each input-output connection has the same delay bound in the batch scheduling mode. The former scheme neglects the effect of reconfiguration overhead, which may result in crippled system performance, while the latter cannot satisfy users' differentiated Quality of Service(Qo S) requirements. To make up these deficiencies, we propose a new batch scheduling scheme to meet the various portto-port delay requirements in a best-effort manner. Moreover, a speedup is considered to compensate for both the reconfiguration overhead and the unavoidable slots wastage in the switch fabric. With traffic matrix and delay constraint matrix given, this paper proposes two heuristic algorithms Stringent Delay First(SDF) and m-order SDF(m-SDF) to realize the 100% packet switching, while maximizing the delay constraints satisfaction ratio. The performance of our scheme is verified by extensive numerical simulations.

关键词： delay-differentiated packetscheduling optical switch data center cloudservice

Covalent Organic Polymers(COPS):synthesis, design and clean energy application

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Covalent Organic Polymers(COPS):synthesis, design and clean ...

中国化学会第30届学术年会-第三十六分会：纳米材料合成与组装

作者： jianing guo Yuanhui Cheng Zhonghua Xiang Department of Chemical Engineering Beijing University of Chemical Technology

The unique structure and properties make graphene very promise for a wide range of potential applications, including energy storage and conversion, electronics, sensors, and electrocatalysis[1-3]. Similar to grapheme, we developed series of covalent organic polymers(COPs), which were constructed from covent bonds(C-C coupling) between the ever-changing organic linkers by homo- or hetero-polymerization[4, 5]. Moreover, we have developed a class of covalent organic polymers(COPs) incorporating a metal(such as Fe, Co, Mn) with precisely controlled locations of nitrogen heteroatoms and holes were synthesized from various N-containing metal–organic complexes[2, 6]. Owing to their high porosity, precisely-controlled molecular structures and multi-functionalities, COPs hold great potential for efficient energy conversion and storage, particularly as efficient metal-free electrocatalysts for oxygen reduction reaction(ORR) in fuel cells[1, 5, 7]. As to the energy storage, the synthesized N-CPAF-1 possesses large capacitance(385 F/g) and excellent performance stability without any loss in capacitance after 9000 charge–dischargecycles[8].

关键词： covalent organic polymers energy conversion and storage oxygen reduction reaction electrocatalyst

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金属大环化合物基氧还原电催化剂的研究进展

化工学报 2021年第1期72卷 384-397页

作者：郭佳宁向中华北京化工大学有机无机复合材料国家重点实验室北京100029 河北师范大学化学与材料科学学院河北省无机纳米材料重点实验室河北石家庄050024

作为燃料电池的关键反应,阴极电极上的氧还原反应(ORR)的反应动力学缓慢,需要大量昂贵的铂基电催化剂提高反应动力学。然而,铂的价格昂贵、稀缺和耐久性差等问题严重阻碍了燃料电池系统在实际中的广泛应用。因此,发展廉价高活性的非贵... 详细信息

作为燃料电池的关键反应,阴极电极上的氧还原反应(ORR)的反应动力学缓慢,需要大量昂贵的铂基电催化剂提高反应动力学。然而,铂的价格昂贵、稀缺和耐久性差等问题严重阻碍了燃料电池系统在实际中的广泛应用。因此,发展廉价高活性的非贵金属氧还原反应催化剂是实现燃料电池商业应用关键途径之一。大环化合物基催化剂以其独特的配位结构和高共轭化学性质发展迅速,被认为是铂基材料的潜在替代品。本文总结了近年来金属大环化合物基氧还原催化剂的发展和研究成果,着重探讨了金属大环化合物基氧还原催化剂的设计和制备,并概述了金属大环化合物基氧还原催化剂面临的挑战和未来的发展方向。

关键词：氧还原反应金属大环化合物非碳化催化剂电化学燃料电池

Pyrolysis-free covalent organic polymers for electrocatalysis

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Pyrolysis-free covalent organic polymers for electrocatalysi...

绘写古旧书业新图景——访中国书店总经理、社长于华刚

中国化学会2019能源材料和缺陷化学研讨会

作者： Yuanhui Cheng jianing guo Zhonghua Xiang State Key Lab of Organic–Inorganic Composites Beijing University of Chemical Technology

＜正＞Highly efficient electrocatalysts are vital to meet the energy and environmental challenges. Although numerous nonprecious-metal or metal-free carbon-based catalysts have been demonstrated to entirely or partially replace noble-metal-based electrocatalysis, the absence of precise design and predictable process hindered the development. Well-defined 2D Covalent Organic Polymers（COPs） as a new exciting type of electrocatalyst presented superior potentials with precisely controllable capacities, such as robust tailoring heteroatom incorporation and location of active sites.

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出版发行研究 2009年第12期 58-62页

作者：郭佳宁《出版发行研究》编辑部

中国书店是我国第一家国营古旧书店．古旧书业巨擘．经营半个多世纪。始终以发掘、抢救、保护祖国文化遗产为宗旨．坚持向广大民众提供健康有益的文史书刊资料的发行方针．赢得了中国传统文化典籍“保护神”的赞誉。下辖的中国书店出版... 详细信息

中国书店是我国第一家国营古旧书店．古旧书业巨擘．经营半个多世纪。始终以发掘、抢救、保护祖国文化遗产为宗旨．坚持向广大民众提供健康有益的文史书刊资料的发行方针．赢得了中国传统文化典籍“保护神”的赞誉。下辖的中国书店出版社以古籍整理为基础．已经形成以线装新印古籍为特色，以文史、哲学和传统艺术图书出版为优势的出版格局。

关键词：中国书店古旧书业总经理社长古籍整理古旧书店文化典籍中国传统

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伪造股东会决议法律问题探析

特区经济 2011年第1期 127-129页

作者：郭佳宁沈阳师范大学法学院辽宁沈阳110034

股东会决议作为公司的核心文件,是资本多数决原则的贯彻实现。为保护股东和公司的合法权益,各国公司法均对股东会决议的内容和程序作出特别限制,股东会决议必须符合法定条件,否则即构成有瑕疵的股东会决议。伪造的股东会决议属于股东会... 详细信息

股东会决议作为公司的核心文件,是资本多数决原则的贯彻实现。为保护股东和公司的合法权益,各国公司法均对股东会决议的内容和程序作出特别限制,股东会决议必须符合法定条件,否则即构成有瑕疵的股东会决议。伪造的股东会决议属于股东会决议瑕疵的范畴,但与股东会决议的无效、可撤销在逻辑前提上存在本质性的区别,其性质应为股东会决议的不成立。我国公司法对公司决议瑕疵的类型划分存在缺陷,应加以修改和完善。

关键词：股东会决议瑕疵法律行为

城市环境精细化治理的现实逻辑与优化路径--基于需求-回应的分析框架

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理论与改革 2021年第1期 62-75,152页

作者：易承志郭佳宁上海交通大学国际与公共事务学院华东政法大学政治学与公共管理学院

随着改革开放以来城市化的不断推进,中国的城市建设和治理在取得显著成绩的同时也面临着日益严峻的环境挑战和压力。解决城市环境问题和满足城市居民对美好环境的诉求需要不断推进城市环境精细化治理。然而,当前城市环境治理仍然存在着... 详细信息

随着改革开放以来城市化的不断推进,中国的城市建设和治理在取得显著成绩的同时也面临着日益严峻的环境挑战和压力。解决城市环境问题和满足城市居民对美好环境的诉求需要不断推进城市环境精细化治理。然而,当前城市环境治理仍然存在着治理理念相对滞后、治理法制不够健全、治理结构有待优化、治理过程较为粗放、治理绩效评估有所弱化等问题,阻滞了城市环境精细化治理的推进。这构成了城市环境精细化治理的需求层面。为此,应根据城市环境精细化治理的需求,采取有力的优化措施予以回应。

关键词：城市环境环境治理精细化治理绩效评价