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Molecular-level proton acceptor boosts oxygen evolution catalysis to enable efficient industrial-scale water splitting

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Green Energy & Environment 2024年第2期9卷 344-355页

作者： Yaobin Wang Qian Lu Xinlei Ge Feng Li Le Chen Zhihui Zhang zhengping fu Yalin Lu Yang Song Yunfei Bu Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC)UNIST-NUIST Energy and Environment Jointed Lab(UNNU)School of Environmental Science and TechnologyNanjing University of Information Science and Technology(NUIST)219 NingliuNanjing210044China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan University220 HandanShanghai200433China Jiangsu Key Laboratory of Advanced Materials and Technology School of Petrochemical EngineeringChangzhou University1 GehuChangzhou213164China Anhui Laboratory of Advanced Photon Science and Technology University of Science and Technology of China(USTC)96 JinzhaiHefeiAnhui 230026China School of Chemistry and Chemical Engineering Nanjing University of Science and Technology200 Xiaolingwei210094China

Industrial water splitting has long been suppressed by the sluggish kinetics of the oxygen evolution reaction(OER),which requires a catalyst to be ***,we propose a molecular-level proton acceptor strategy to produce an efficient OER catalyst that can boost industrial-scale water ***-level phosphate(-PO_(4))group is introduced to modify the surface of PrBa_(0.5)Ca_(0.5)Co_(2)O_(5)+δ(PBCC).The achieved catalyst(PO_(4)-PBCC)exhibits significantly enhanced catalytic performance in alkaline *** on the X-ray absorption spectroscopy results and density functional theory(DFT)calculations,the PO_(4)on the surface,which is regarded as the Lewis base,is the key factor to overcome the kinetic limitation of the proton transfer process during the *** use of the catalyst in a membrane electrode assembly(MEA)is further evaluated for industrial-scale water splitting,and it only needs a low voltage of 1.66 V to achieve a large current density of 1 A cm^(-2).This work provides a new molecular-level strategy to develop highly efficient OER electrocatalysts for industrial applications.

关键词： Oxygen evolution reaction Nanofiber Water splitting Proton acceptor Perovskite

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广东自由贸易试验区联动关系研究

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国际经济合作 2024年第3期 59-67,93页

作者：符正平彭曦中山大学管理学院中山大学自贸区综合研究院中山大学粤港澳发展研究院

自由贸易试验区要避免“画地为牢”,关键在于如何处理与各方面的联动关系。以广东自由贸易试验区为例,联动关系包括与大湾区内地城市和海南自由贸易港经济功能园区,与香港地区和澳门地区两个自由港,以及与RCEP成员国和“一带一路”共建... 详细信息

自由贸易试验区要避免“画地为牢”,关键在于如何处理与各方面的联动关系。以广东自由贸易试验区为例,联动关系包括与大湾区内地城市和海南自由贸易港经济功能园区,与香港地区和澳门地区两个自由港,以及与RCEP成员国和“一带一路”共建国家之间的联动。在与周边城市及海南自由贸易港的联动发展中,应强调平台之间的联动,利用“飞地”模式推进跨区域产业联动;在与香港地区、澳门地区自由港的联动发展中,应注重规则衔接与机制对接,探索建设粤港澳单一自贸区;在与RCEP成员国及“一带一路”共建国家联动发展中,要对标CPTPP等高水平国际经贸规则,加强与相关国家自贸区、工业园区之间的联动,将自由贸易试验区建设成为跨境产业链供应链的核心节点。

关键词：自贸试验区联动发展粤港澳大湾区 “一带一路” RCEP

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围术期精细化护理在内科胸腔镜术中的应用效果分析

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中外医药研究 2024年第9期3卷 138-140页

作者：付正萍黔西南布依族苗族自治州人民医院贵州兴义562400

目的:分析围术期精细化护理在内科胸腔镜术中的应用效果。方法:选取2022年11月—2023年11月拟于黔西南布依族苗族自治州人民医院行内科胸腔镜治疗的胸腔积液患者75例作为研究对象,采用抽签法分为试验组(n=38)与对照组(n=37)。对照组实... 详细信息

目的:分析围术期精细化护理在内科胸腔镜术中的应用效果。方法:选取2022年11月—2023年11月拟于黔西南布依族苗族自治州人民医院行内科胸腔镜治疗的胸腔积液患者75例作为研究对象,采用抽签法分为试验组(n=38)与对照组(n=37)。对照组实施常规围术期护理,试验组实施围术期精细化护理。比较两组疼痛程度、并发症发生情况、肺功能。结果:护理前,两组视觉模拟评分法(VAS)评分比较,差异无统计学意义(P>0.05);护理后,两组VAS评分降低,试验组低于对照组,差异有统计学意义(P0.05);护理后,两组FVC、FEV_(1)、FEV_(1)/FVC水平升高,试验组高于对照组,差异有统计学意义(P<0.05)。结论:围术期精细化护理在科胸腔镜术中的应用效果显著,可缓解疼痛,降低并发症发生率,改善肺功能。

关键词：胸腔积液内科胸腔镜术围术期精细化护理

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直面国际服务贸易规则重构的基本取向——关于对标CPTPP和DEPA“禁止要求当地存在规则”研究

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开放导报 2024年第3期 71-78页

作者：符正平刘金玲中山大学广东广州510275

数字服务贸易在推动全球贸易向服务化方向发展的同时,对国际服务贸易规则也提出了全新的挑战。CPTPP和DEPA均设立了关于跨境服务贸易的“禁止要求当地存在规则”,以减少国际间的贸易壁垒,促进服务贸易自由流动,其在很大程度上提升了贸... 详细信息

数字服务贸易在推动全球贸易向服务化方向发展的同时,对国际服务贸易规则也提出了全新的挑战。CPTPP和DEPA均设立了关于跨境服务贸易的“禁止要求当地存在规则”,以减少国际间的贸易壁垒,促进服务贸易自由流动,其在很大程度上提升了贸易便利性,降低了成本,但也成为监管方面新的课题。对标CPTPP与DEPA,我国在某些服务部门的关键性监管条款还需进一步放宽,如在电子商务、跨境数据处理等领域。与此同时,“禁止要求当地存在规则”给数据本地化及数字化国际服务贸易增值税征管带来挑战。应在全面梳理中国服务贸易协定具体承诺和国内法规基础上,以自贸试验区(港)为“试验田”,结合监管目标和监管能力等因素,引入相关规则进行压力测试,同时,对相关法律法规适时进行调整,提升跨境服务贸易监管能力,以期建立高效、透明的服务贸易监管体系,并不断优化政策环境,吸引更多跨国企业参与中国市场,共同推动服务贸易的国际化、数字化进程。

关键词：数字化服务贸易禁止当地存在规则中国应对方案

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Theory and Promotion Strategy of Integrated Development for the Guangdong-Hong Kong-Macao Greater Bay Area

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China Economic Transition 2023年第3期6卷 317-334页

作者： fu zhengping Institute of Guangdong Hong Kong and Macao Development StudiesSun Yat-sen UniversityGuangzhou 510275China

The Guangdong-HonggKong-Macao Greater Bay Area comprises a region aleconomyencom passing ninecities located in the Pearl River Delta region,in addition to the two special administrative regions of Hong Kong and *** process of regional economic integration within the Guangdong-HonggKong-Macao Greater Bay Area traces its origins back to the commencement of China's reform and opening up policies in *** evolves from an initially spontaneous collaborative model,where front-end commercial activities are paired with rearend manufacturing facilities,to a deliberate form of collaboration underpinned by institutional *** paper examines the fundamental characteristics of the regional economic integration within the Guangdong-Hong Kong-Macao Greater Bay *** specifically delves into an extensive analysis of the construction and development of this *** discussion encompasses four significant theoretical and practical facets that shape the progresss of the Greater BayArea's *** aspects include the synchronization of market integration within the Greater Bay Area,the harmonization of institutional frameworks,the convergence of the eastern and western sections of the Pearl River Estuary,and the amalgamation of regional ***,the paper engages in an exploration of strategies designed to propel the advancement of the Greater Bay Area's *** strategies encompass collaborative initiatives,such as the joint development of the Shenzhen-Hong Kong adjacent region,the cooperative advancement of Hengqin Island by Zhuhai and Macao,the approach to integrating adjacent areas,and the interlock strategy aiming to connect the two pivotal urban centers of Guangzhou and Shenzhen.

关键词： Guangdong-Hong Kong-Macao Greater Bay Area regional integration border region integration Guangzhou-Shenzhen interlock strategy

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Nonlinear uncertainty impact of geometric variations on aerodynamic performance of low-pressure turbine blades with ultra-high loading under extreme operational conditions

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Chinese Journal of Aeronautics 2024年第5期37卷 281-300页

作者： Xiaojing WANG zhengping ZOU Chao fu Pengcheng DU School of Energy and Power Engineering Beihang UniversityBeijing 100191China National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics Beihang UniversityBeijing 100191China Research Institute of Aero-Engine Beihang UniversityBeijing 100191China

Uncertainty impact of random geometric variations on the aerodynamic performance of low-pressure turbine blades is considerable,which is further amplified by the current ultra-high-lift design trend for weight ***,this uncertainty impact on ultra-highly loaded blades under extreme operational conditions near the margins with potential large-scale open separation is focused on in this *** is demonstrated that this impact is significant,unfavourable,and nonlinear,which is clearly severer under extreme *** addition to the overall attenuation and notable scattering of specific performance,the operational margins with open separation are also notably scattered with great risk of significant *** scattering and nonlinearity are dominated by the variations in leading-edge *** thinning of leading edge triggers local transition,enhancing downstream friction and reducing resistance to open separation,which is further exacerbated by operational ***,the opposite thickening yields less benefit,implying *** unfavourable impact highlights the need for robust aerodynamic design,where both a safer operational condition and a more robust blade are indispensable,i.e.,a compromise among performance,weight,and *** the necessary limitation of loading levels,a mid-loaded design is recommended to reduce adverse pressure gradients in both the leading edge and rear region of the suction side,which helps to decrease the susceptibility of the transition and open separation to random *** improvements can also be achieved by appropriately thickening the leading edge.

关键词： Ultra-highly loaded turbine blade Geometric variations Uncertainty analysis Operational margins Robust aerodynamic design Nonlinearity

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Controlling of coordination state of Ru_(x)N_(y) clusters for efficient oxygen reduction electrocatalysis

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Nano Research 2024年第3期17卷 1035-1041页

作者： Weiyang fu Yihuan Yu Tongtong Liu Yinliang Cao zhengping Zhang Feng Wang State Key Laboratory of Chemical Resource Engineering Beijing Key Laboratory of Electrochemical Process and Technology for MaterialsBeijing University of Chemical TechnologyBeijing 100029China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Zhejiang Tianneng Hydrogen Energy Technology Co. Ltd.Huzhou 313100China

Ruthenium(Ru)is an attractive potential alternative to platinum as an electrocatalyst for the oxygen reduction reaction(ORR),in virtue of its high catalytic selectivity and relatively low *** this work,a series of well-dispersed nitrogen-coordinated Ru-clusters on carbon black(Ru_(x)N_(y)/C)were prepared by pyrolyzing different Ru-containing sandwich compounds as the Ru *** higher thermal stability of these complexed sandwich precursors(bis(1,2,3,4,5-pentamethylcyclopentadienyl)Ru(II)monomer,dichloro(p-cymene)Ru(II)dimer,and chloro(1,2,3,4,5-pentamethylcyclopentadienyl)Ru(II)tetramer)affords the control of coordinated state for the resulting Ru-clusters,in comparison of that derived from ruthenium *** the pyrolysis treatment,the Ru coordinated state in Ru_(x)N_(y)/C,with the Ru–N and Ru–Ru bonds,still showed the structural inheritance from the Ru(II)monomer,dimer,and tetramer,but using ruthenium chlorides as the Ru source resulted in the nanoscale Ru *** ORR testing exhibited that the Ru_(x)N_(y)/C sample derived from the Ru(II)tetramer(Ru_(x)N_(y)/C-T)presents the higher catalytic activity than the other obtained samples in either alkaline or acidic *** in the acidic electrolyte,Ru_(x)N_(y)/C-T shows the comparable ORR activity to that of Pt/C catalysts,and it shows the superior tolerance against methanol and *** X-ray absorption spectroscopy and density functional theory calculations demonstrate that these tetra-nuclear Ru-clusters could be the most active site due to their broadened d-orbital bands and lower energy d-band center than those of other subnano species and nanocrystals,and their favorable Yeager-type adsorption of O_(2)-molecules is also contributed to promoting O–O bond cleavage and accelerating the ORR process.

关键词： ruthenium clusters coordination environment sandwich compounds electrocatalysis oxygen reduction reaction

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Effect of Alliance Orientation on Firm Performance： An Empirical Study on High-Technology Firms in China

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Frontiers of Business Research in China 2012年第3期6卷 375-397页

作者： zhengping fu Wei Peng Sun Yat-sen Business School Sun Yat-sen UniversityGuangzhou 510275China

Based upon the dynamic-capability view and social capital theory, this paper examines the effect of alliance orientation on firm performance. Hypotheses are tested with data collected from 195 high-tech firms in China. Results show that alliance orientation has a significant and positive effect on firm performance. Moreover, market dynamism exerts a positive moderating effect on the relationship between alliance orientation and firm performance, whereas technological dynamism negatively moderates the relationship. Moreover, relational capital partially mediates the same relationship and the interaction effects of alliance orientation and market dynamism on firm performance.

关键词： alliance orientation firm performance relational capital environmentaldynamism

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New method to grow preferentially-oriented 4H-SiC films on Si substrate

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Chinese Science Bulletin 1999年第6期44卷 575-576页

作者： zhengping fu Beifang Yang Ruchuan Liu Pengxian Zhang Yaozhong Ruan Univ Sci & Technol China Dept Mat Sci & Engn Hefei 230026 Peoples R China Zhejiang Univ State Key Lab Si Mat Hangzhou 310027 Peoples R China fudan Univ State Key Lab Surface Phys Shanghai 200433 Peoples R China Yunnan Polytech Univ Kunming 650051 Peoples R China

SILICON carbide, a semiconductor with chemistry inertia, is well suited to fabricate optoelectronic device working at high temperature, high power, high frequency, and in high radiation environments. Among the hundreds of SiC polytypes, 4H-SiC, with a wider bandgap, a higher and much less anisotropic electron mobility than 6H-SiC, has aroused much attention .

关键词： SiC XRD New method to grow preferentially-oriented 4H-SiC films on Si substrate PMDA high

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Ferromagnetic and ferroelectric properties of Aurivillius phase Bi_9Fe_(4.7)Me_(0.3)Ti_3O_(27)(Me 5 Fe, Co, Ni, Mn)

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Chinese Science Bulletin 2014年第36期59卷 5199-5204页

作者： Guopeng Wang Shujie Sun Yan Huang Jianlin Wang Ranran Peng zhengping fu Yalin Lu CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and Engineering University of Science and Technology of China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of China

New Aurivillius phase Bi9Fe4.7Me0.3Ti3O27(Me = Fe, Co, Ni, Mn) oxides have been prepared using a citrate combustion method. X-ray diffraction on powders and high-resolution transmission electron microscopy investigation confirmed that the Bi9Fe4.7Me0.3Ti3O27 samples are with an eight-layer structure. Both ferromagnetic and ferroelectric investigations suggested that Co or Ni substitution could enhance their multiferroic properties,while Mn substitution depressed them. Among all the samples, Bi9Fe4.7Co0.3Ti3O27 sample exhibits the largest remnant polarization of Pr*3.8 l C/cm2, and the largest remnant magnetization of Mr*0.06 lB/f.u. with a Curie temperature about 764 K, while the Bi9Fe4.7Ni0.3Ti3O27 sample has the largest spontaneous magnetization(0.26 lB/f.u.). The improved ferromagnetic properties ofboth Bi9Fe4.7Co0.3Ti3O27 and Bi9Fe4.7Ni0.3Ti3O27 can be ascribed to the spin canting of magnetic ion-based sublattices via the Dzyaloshinskii–Moriya interaction and also the magnetic ions exchanging interactions(Fe3–O–Co3or Fe3–O–Ni3).

关键词：铁电性能铁磁特性交换相互作用透射电子显微镜锰钴镍 X射线衍射

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