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The critical role of electrochemically activated adsorbates in neutral OER

Science China Materials 2020年第12期63卷 2509-2516页

作者： Longsheng Zhang Haiyang Yuan Liping Wang Hui Zhang Yijing Zang Yao Tian Yunzhou Wen Fenglou Ni Hao Song Haifeng Wang Bo Zhang Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China Key Laboratory for Advanced Materials Key Laboratory for Advanced MaterialsCentre for Computational Chemistry and Research Institute of Industrial CatalysisEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesCAS Center for Excellence in Superconducting ElectronicsShanghai 200050China Key Laboratory of Systems Bioengineering School of Chemical Engineering and TechnologySynBio Research PlatformCollaborative Innovation Centre of Chemical Science and EngineeringTianjin UniversityTianjin 300072China

Developing efficient electrocatalysts for the oxygen evolution reaction(OER)under neutral conditions is important for microbial electrolysis cells(MECs).However,the OER kinetics in neutral electrolytes at present are extremely sluggish,resulting in high overpotentials that greatly limit the energy conversion efficiencies of *** studies failed to probe the adsorbates on surface metal sites of catalysts at the atomic scale and elucidate their influence on the catalytic activities,which has impeded the rational design of efficient neutral OER catalysts with optimal surface ***,using in situ transmission electron microscopy(TEM),in situ X-ray photoelectron spectroscopy(XPS)and in situ low-energy ion scattering studies,we have identified,for the first time,that the electrochemically activated adsorbates on surface metal sites play a critical role in boosting the neutral OER activities of Ru-Ir binary oxide(RuxIryO2)*** adsorbate-activated RuxIryO2on a glassy carbon electrode achieved a low overpotential of 324 m V at10 m A cm-2in neutral electrolyte,with a 36-fold improvement in turnover frequency compared with that of Ir *** application in an MEC system,the resulting full cell showed a decreased voltage of 1.8 V,200 m V lower than the best value reported to date,facilitating efficient synthesis of poly(3-hydroxybutyrate)from bioelectrochemical *** functional theory(DFT)studies revealed that the enhanced OER activity of RuxIryO2catalyst arose from local structural distortion of adjacent adsorbate-covered Ru octahedra at the catalyst surface and the consequently decreased adsorption energies of OER intermediates on Ir active center.

关键词： electrocatalysis oxygen evolution reaction adsorbates neutral electrolytes

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States of graphene oxide and surface functional groups amid adsorption of dyes and heavy metal ions

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Chinese Journal of Chemical Engineering 2023年第11期63卷 197-208页

作者： Zhaoyang Han Ling Sun Yingying Chu Jing Wang Chenyu Wei Qianlei Jiang Changbao Han Hui Yan Xuemei Song Institute of Advanced Energy Materials and Devices Faculty of Materials and ManufacturingKey Laboratory of Advanced Functional Materials of Education Ministry of ChinaBeijing University of TechnologyBeijing 100124China Beijing Guyue New Materials Research Institute Beijing University of TechnologyBeijing 100124China

Water pollution regarding dyes and heavy metal ions is crucial facing the *** to effectively separate these contaminants from water has been a key *** oxide(GO)promises the greenwater world as a long-lasting spotlight adsorbent material and therefore,harnessing GO has been the research hotspot for over a *** state of GO as well as its surface functional groups plays an important role in *** the way of preparation and structural modification matters to the performance of *** this review,the significance of the state of existence of stock GO and surface functional groups is explored in terms of preparation,structural modification,and ***,various adsorbates for GO adsorption are also involved,the discussion of which is rarely established elsewhere.

关键词： Stock graphene oxide Surface functional groups Existence state adsorbates Enhanced adsorption Dyes

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Image interpretation of weak-coupling N-mer adsorbate's STM system

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Chinese Science Bulletin 1997年第5期42卷 371-374页

作者： HUANG Xintang, Ql Shouren, LI Xinjiao and LI Yongping1 Department of Physics, Central China Normal University, Wuhan 430070, China Department of Solid State Electronics, Huazhong University of Science and Technology, Wuhan 430074, China 2. Department of Physics, University of Science and Technology of China, Hefei 230026, China Department of Physics Central China Normal University Wuhan China Department of Solid State Electronics Huazhong University of Science and Techndogy Wuhan China Department of Physics University of Science and Technology of China Hefei China

Up to now, there have been many indistinctive points in the image interpretation of scanning tunnelhng microscopy (STM) system, and the problems have attracted almost all STM scientists’ attention. In 1992, Kenkre proposed the new programme which describes the behaviour of the electrons moving in the STM tunnelling by the method of exciton dynamics, and the programme not only breaks through the restrictions of Tersoff-Hamann theory, but also can be applied conveniently to discussing the effects of the tip structure, adsorbate structure, substrate structure, temperature, tunneling voltage, and the degree of coherence of elec-

关键词： weak-coupling N-mer adsorbates STM image interpretation exciton dynamics method.

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The Surface Chemistry of the Mild Steel and Glass Substrates for Thermal Spray

The Surface Chemistry of the Mild Steel and Glass Substrates...

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作者： Wei Xie College of Gongqing Nanchang University Faculty of Engineering and Industrial Sciences Swinburne University of Technology

The surface chemical condition of substrates plays a key role in single splats formation. Single splats are the foundation of thermal spray coatings. In this study, the surface chemistry of the mild steel and glass substrates were investigated. The result indicated that the 100 ℃ heat treatment released the absorbents of mild steel substrates. The adsorbed water disappears from the surface of the mild steel sample after one hour of heat treatment at 100 ℃;there is no adsorbed water on the surface of the glass sample.

关键词： surface chemistry xps adsorbates thermal spray single splat

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