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Mixed iridium-nickel oxides supported on antimony-doped tin oxide as highly efficient and stable acidic oxygen evolution catalysts

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Materials Futures 2024年第1期3卷 165-180页

作者： jonathan ruiz esquius Alec P LaGrow Haiyan Jin Zhipeng Yu Ana Araujo Rita Marques Adélio Mendes Lifeng Liu Clean Energy Cluster International Iberian Nanotechnology LaboratoryAv.Mestre JoséVeigaBraga 4715-330Portugal Carbon Science and Technology Institute INCAR-CSICFrancisco Pintado Fe 26Oviedo 33011Spain Scientific Imaging Section Okinawa Institute of Science and Technology Graduate UniversityKunigami-gunOkinawa 904-0412Japan Songshan Lake Materials Laboratory Dongguan 523808People’s Republic of China Laboratory for Process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal Associate Laboratory in Chemical Engineering Faculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal.

Proton exchange membrane(PEM)water electrolysis represents a promising technology for green hydrogen production,but its widespread deployment is greatly hindered by the indispensable usage of platinum group metal catalysts,especially iridium(Ir)based materials for the energy-demanding oxygen evolution reaction(OER).Herein,we report a new sequential precipitation approach to the synthesis of mixed Ir-nickel(Ni)oxy-hydroxide supported on antimony-doped tin oxide(ATO)nanoparticles(IrNiyO_(x)/ATO,20 wt.%(Ir+Ni),y=0,1,2,and 3),aiming to reduce the utilisation of scarce and precious Ir while maintaining its good acidic OER *** tested in strongly acidic electrolyte(0.1 M HClO_(4)),the optimised IrNi1Ox/ATO shows a mass activity of 1.0 mAµgIr^(−1) and a large turnover frequency of 123 s^(−1) at an overpotential of 350 mV,as well as a comparatively small Tafel slope of 50 mV dec^(−1),better than the IrOx/ATO control,particularly with a markedly reduced Ir loading of only 19.7µgIr cm^(−2).Importantly,IrNi1O_(x)/ATO also exhibits substantially better catalytic stability than other reference catalysts,able to continuously catalyse acidic OER at 10 mA cm^(−2) for 15 h without obvious *** in-situ synchrotron-based x-ray absorption spectroscopy confirmed that the Ir^(3+)/Ir^(4+)species are the active sites for the acidic ***,the performance of IrNi1Ox/ATO was also preliminarily evaluated in a membrane electrode assembly,which shows better activity and stability than other reference *** IrNi1Ox/ATO reported in this work is a promising alternative to commercial IrO_(2) based catalysts for PEM electrolysis.

关键词： mixed oxides oxygen evolution reaction polymer electrolyte membrane antimony doped tin oxide membrane electrode assembly

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High entropy materials as emerging electrocatalysts for hydrogen production through low-temperature water electrolysis

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Materials Futures 2023年第2期2卷 24-53页

作者： jonathan ruiz esquius Lifeng Liu Clean Energy Cluster International Iberian Nanotechnology Laboratory(INL)Avenida Mestre JoséVeigaBraga 4715-330Portugal Songshan Lake Materials Laboratory Dongguan 523808People’s Republic of China

The production of hydrogen through water electrolysis(WE)from renewable electricity is set to revolutionise the energy sector that is at present heavily dependent on fossil ***,there is still a pressing need to develop advanced electrocatalysts able to show high activity and withstand industrially-relevant operating conditions for a prolonged period of *** this regard,high entropy materials(HEMs),including high entropy alloys and high entropy oxides,comprising five or more homogeneously distributed metal components,have emerged as a new class of electrocatalysts owing to their unique properties such as low atomic diffusion,structural stability,a wide variety of adsorption energies and multi-component synergy,making them promising catalysts for challenging electrochemical reactions,including those involved in *** review begins with a brief overview about WE technologies and a short introduction to HEMs including their synthesis and general physicochemical properties,followed by a nearly exhaustive summary of HEMs catalysts reported so far for the hydrogen evolution reaction,the oxygen evolution reaction and the overall water splitting in both alkaline and acidic *** review concludes with a brief summary and an outlook about the future development of HEM-based catalysts and further research to be done to understand the catalytic mechanism and eventually deploy HEMs in practical water electrolysers.

关键词： energy conversion high entropy materials hydrogen evolution reaction oxygen evolution reaction water splitting

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Heritage risk index:A multi-criteria decision-making tool to prioritize municipal historic preservation projects

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Frontiers of Architectural Research 2020年第2期9卷 403-418页

作者： jonathan ruiz-Jaramillo Carmen Munoz-Gonzalez Maria Dolores Joyanes-Diaz Eduardo Jimenez-Morales Jose Manuel Lopez-Osorio Roberto Barrios-Perez Carlos Rosa-Jimenez Department of Art and Architecture School of ArchitectureUniversidad de MalagaMalaga 29071Spain

The current pressure on the built historical heritage requires a global evaluation to develop strategies for its preservation.A combined vision of the state of conservation of architectural heritage is essential to highlight the vulnerabilities of the structure from which harmonized measures can be proposed for its *** study proposes a multi-criteria analysis methodology that considers a qualitative and quantitative approach to organize the global conservation state of heritage buildings hierarchically.A global index can be determined on the basis of the generation of an interoperable data matrix by defining a set of indicators to assess different components of a *** index describes the risk with respect to the stability,safety,and habitability of the *** methodology aims to achieve the state of the building in an integral way by obtaining a simple and objective index that enables efficient comparison among different *** application of this methodology to a historic area allows creating a hierarchical map of risk to stablish priorities for intervention and enable a sustainable and critical management and planning over the actions of maintenance,conservation,and *** this way,a holistic vision of the complex reality of built heritage and the urban landscape is obtained to identify critical areas of priority intervention.

关键词： Historic city State of conservation Risk index Intervention priority Architectural heritage

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村城

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建筑实践 2020年第8期3卷 54-63页

作者：滋埜悠司杨毓琼王子朋曹仪 Pedro Manzano ruiz 雷坛坛(摄) 肖磊无不详间筑设计

地点:广东省广州市Location:Guangzhou,Guangdong Province道格·桑德斯曾在《Arrival City:The Final Migration and Our Next World》一书中指出落脚城市(也就是城中村)的发展是城市化进程中的关键一环,可能是下一波经济与文化的诞生... 详细信息

地点:广东省广州市Location:Guangzhou,Guangdong Province道格·桑德斯曾在《Arrival City:The Final Migration and Our Next World》一书中指出落脚城市(也就是城中村)的发展是城市化进程中的关键一环,可能是下一波经济与文化的诞生地,也可能是下一波暴力冲突的爆发地,需要我们妥善处理。

关键词：暴力冲突桑德斯经济与文化城中村广东省广州市落脚城市

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