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Fabrication of amorphous PdNiCuP nanoparticles as efficient bifunctional and highly durable electrocatalyst for methanol and formic acid oxidation

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Journal of Materials Science & Technology 2022年第27期122卷 148-155页

作者： Yunwei Liu Chang Liu Zelin Chen xuerong zheng Rui Jiang Xing Tong Yida Deng Wenbin Hu Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300372China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Songshan Lake Materials Laboratory Dongguan 523808China

Highly active and durable electrocatalytic materials towards small molecules electro-oxidation reaction are critical to the large-scale commercial applications of direct liquid fuel ***,current nanocrystalline electrocatalysts normally suffer from low catalytic efficiency,severe CO poisoning and rapid activity ***,we report a novel amorphous Pd Ni Cu P catalyst synthesized with laser liquid ablation as a potential settlement to this *** as-obtained amorphous Pd Ni Cu P catalyst exhibits enhanced electrocatalytic performance with the mass activity of 1.61 A mg^(-1)and 737.8 m A mg^(-1)towards methanol oxidation reaction(MOR)and formic acid oxidation reaction(FAOR),***,amorphous Pd Ni Cu P displays excellent operation stability and CO-poisoning resistance in both alkaline and acidic medium.P was proposed to play the decisive role for forming the amorphous structure and maintaining the catalytic stability in MOR and FAOR *** work provided insights for the ration design of active and durable amorphous electrocatalysts applied in direct liquid fuel cells.

关键词： Laser ablation Amorphous catalyst Anti-poisoning Stable Methanol oxidation Formic acid oxidation

How the surface Cu layer affected the activity of Ni foil for alkaline hydrogen evolution

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Journal of Materials Science & Technology 2024年第2期169卷 11-18页

作者： Qingfeng Hu Yuan Liu xuerong zheng Jinfeng Zhang Jiajun Wang Xiaopeng Han Yida Deng Wenbin Hu School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

Synthesizing bimetallic nanomaterials,with noble metals as the surface layers and inert metals as the substrates,has been proven to be an effective way to reduce the use of noble metals with maintained catalytic ***,an atomic diffusion from the inert substrate to the surface during the long-term operation has been reported to significantly decrease the *** this work,a series of catalysis-inert Cu-coated Ni foil were fabricated through electrodeposition and their activities for alkaline hydrogen evolution were ***,the Ni/Cu-60 sample showed a similar catalytic property with pure Ni foil and only a slight decrease in HER activity was *** X-ray photoelectron spectroscopy(XPS)results indicated a decreased electron concentration of Cu in Ni/Cu-60,and theoretical calculations further demonstrated the electron transfer between the Ni substrate and Cu *** results reveal that a specific composition or structure of an inert metal layer might not significantly decrease the electrocatalytic activity of active ***,there are more possibilities for the rational design of metal-based catalysts for electrocatalysis.

关键词： Bimetallic heterostructure Charge redistribution Water splitting Alkaline hydrogen evolution

Sulfate-assisted Ni/Fe-based electrodes for anion exchange membrane saline splitting

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Nano Research 2024年第7期17卷 5985-5995页

作者： Yujun Han Li Shao Yuhang Liu Guodong Li Tongzhou Wang xuerong zheng Jihong Li Xiaopeng Han Wenbin Hu Yida Deng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

Saline water electrolysis is an appealing strategy for hydrogen production,attracting more attention in recent ***-based electrodes exhibit promise as catalysts for saline water ***,they suffer from the inferior service life of the oxygen evolution reaction(OER).Herein,we report an oxygen-evolution electrode consisting of a sulfate-modulated nickel-iron hydroxide(NiFeOOH)affording as the catalytic active layer and Fe-Ni_(3)S_(2) as the corrosion-proof *** developed electrode only requires overpotentials of 220 and 292 mV to deliver the current density of 10 and 500 mA·cm^(−2),*** importantly,it presents long-term stability exceeding 140 and 100 h in 1 M KOH at high current densities of 500 and 1000 mA·cm^(−2),respectively,as well as 120 h for saline water electrolysis at 100 mA·cm^(−2).Experimental results reveal that the generated sulfate plays an indispensable role in improving stability and corrosion *** assembled and tested an anion exchange membrane electrolyzer with Pt/C and NiFeS/NIF as the cathode and anode,respectively,under industrial *** overall water-splitting electrolyzer achieves an impressive energy conversion efficiency of 75%±0.5%.This report offers fresh insights into the design of stable NiFe-based electrodes,which may further promote its practical applications for saline water electrolysis.

关键词： saline water electrolysis oxygen evolution reaction anode material water splitting

Facile synthesized Cu-SnO2 anode materials with three-dimensional metal cluster conducting architecture for high performance lithium-ion batteries

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Chinese Chemical Letters 2018年第11期29卷 1656-1660页

作者： Zhijia Zhang Yuxuan Hou Shaofei Zhang Guoliang Zhang Ming Li Huanming Lu Yong Li xuerong zheng Zhijun Qiao Zhenyang Yu Qin Huang Jianli Kang School of Materials Science and Engineering Tianjin Polytechnic University Tianjin 300387 China School of Mechanical Engineering Tianjin Polytechnic University Tianjin 300387 China Tianjin Municipal Key Laboratory of Advanced Fibers and Energy Storage Tianjin 300387 China Test Center Ningbo Institute of Material Technology and Engineering Chinese Academy of Science (CAS) Ningbo 315201 China School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tionjin 300072 China State key laboratory of separation membrane and membrane processes Tianjin Polytechnic University Tianfin 300387 China

Metal oxide anode material is one of promising candidates for the next-generation LIBs, due to its high theoretical capacity and low cost. The poor conductivity and huge volume change during charge/ discharge, however, restrict the commercialization of metal oxide anode material. In this work, we design a novel Cu-SnO2 composite derived from Cu6Sn5 alloy with three dimensional （3D） metal cluster conducting architecture. The novel Cu structure penetrates in the composite particles inducing high conductivity and space-confined SnO2, which restrict the pulverization of SnO2 during lithiation/ delithiation process. The optimized Cu-SnO2 composite anode delivers an initial discharge capacity of 933.7 mA h/g and retains a capacity of 536.1 mA h/g after 200 cycles, at 25℃ and a rate of 100 mA/g. Even at the high rate of 300 mA/g, the anode still exhibits a capacity of more than 29% of that tested at 50 mA/g. Combining with the phase and morphology analysis, the novel Cu-SnO2 composite not only has good electrical conductivity, but also possesses high theoretical capacity （995 mAh/g）, which may pave a new way for the design and construction of next-generation metal oxide anode materials with high power and cycling stability.

关键词： Cu-SnO2 composite Cu6Sn5 alloy Ball milling Anode materials Lithium-ion batteries

Multi-injection Synthesis of CdSe Nanocrystals by Solution Process with Glycerol-Ethylene Glycol

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Journal of the Chinese Ceramic Society 2014年第2期 99-105页

作者： MA Yuanliang zheng xuerong LI Haiqin WANG Tao JI Huiming College of Physics and Electronic Information Engineering Qinghai University for Nationalities Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and EngineeringTianjin University

Wurtzite CdSe nanocrystals were synthesized by a multi-injection solution chemical process with glycerol-ethylene glycol based solvent,sodium selenite and cadmium nitrate-tetrahydrate as precursors,ammonia as a chelating agent and hydrazine hydrate as a reducing *** crystal phase,morphologies and optical absorption of the as-prepared CdSe nanocrystals were characterized by X-ray diffraction,scanning electron microscopy,transmission electron microscopy and UV-Vis analysis,*** relation between the light absorbance and reaction time for three reaction solutions with different hot injection styles was analyzed via the UV-Vis measurement at a wavelength of480 *** results show that the injection style in the multi-injection process has an effect on the nucleation and growth,crystal size,dispersing stability and optical band-gap energy of the *** mild injection style results in the formation of uniform and well-dispersive nanocrystals.

关键词： CdSe nanocrystals multi-injection synthesis polyol based solution injection styles

Correlating the crystal structure and facet of indium oxides with their activities for CO_(2)electroreduction

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Fundamental Research 2024年第3期4卷 635-641页

作者： Jiajun Wang Guangjin Wang Han Wu Fei Liu Xixi Ren Yidu Wang Yanhui Cao Qi Lu xuerong zheng Xiaopeng Han Yida Deng Wenbin Hu School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China School of Materials Science and Energy Engineering Foshan UniversityFoshan 528000China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

Constructing structure-function relationships is critical for the rational design and development of efficient catalysts for CO_(2) electroreduction reaction(CO_(2)RR).In_(2)O_(3) is well-known for its specific ability to produce formic ***,how the crystal phase and surface affect the CO_(2)RR activity is still unclear,making it difficult to further improve the intrinsic activity and screen for the most active *** this work,cubic and hexagonal In_(2)O_(3) with different stable surfaces((111)and(110)for cubic,(120)and(104)for hexagonal)are investigated for CO_(2)*** results demonstrate that the adsorption of reactants on cubic In_(2)O_(3) is stronger than that on hexagonal In_(2)O_(3),with the cubic(111)surface being the most active for CO_(2)*** experiments,synthesized cubic In_(2)O_(3) nanosheets with predominantly exposed(111)surfaces exhibited a high HCOO^(-)Faradaic efficiency(87.5%)and HCOO^(–)current density(–16.7 mA cm^(-2))at–0.9 V vs *** addition,an aqueous Zn-CO_(2) battery based on a cubic In2O3 cathode was *** work correlates the phases and surfaces with the CO_(2)RR activity,and provides a fundamental understanding of the structure-function relationship of In_(2)O_(3),thereby contributing to further improvements in its CO_(2)RR ***,the results provide a principle for the directional preparation of materials with optimal phases and surfaces for efficient electrocatalysis.

关键词： Structure-function relationship CO_(2)electroreduction Indium oxide Reactionmechanism Catalyst design

Facile synthesis of nickel cobalt selenide hollow nanospheres as efficient bifunctional electrocatalyst for rechargeable Zn-air battery

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Science China Materials 2020年第3期63卷 347-355页

作者： xuerong zheng Jinfeng Zhang Jihui Wang Zhijia Zhang Wenbin Hu Yajing Han School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of the Ministry of EducationTianjin UniversityTianjin 300072China Department of Chemistry Virginia TechBlacksburgVirginia 24061USA School of Materials Science and Engineering Tianjin Polytechnic UniversityTianjin 300387China

Designing high active,low cost and bifunctional electrocatalysts is urgent for developing clean energy storage and conversion *** metal selenides exhibit optimal electronic conductivity and tunable physicochemical properties,which endow them with potential for efficient electrocatalysts to facilitate the oxygen reduction and oxygen evolution reactions(ORR and OER).Herein,hollow NixCo0.85-xSe nanospheres were synthesized using a facile polyol based solution chemical *** NixCo0.85-xSe exhibits an onset overpotential of 0.89 V for ORR,and an overpotential of 305 mV to achieve 10 mA cm^-2 for ***,the NixCo0.85-xSe based Zn-air battery displays remarkable specific capacity and *** superior catalytic performances can be attributed to the synergistic effect,large specific surface area and enhanced electron transfer *** approach provides a new way to design highly efficient bifunctional electrocatalysts for electrochemical energy storage and utilization.

关键词： transition metal selenides bifunctional electrocatalyst oxygen reduction reaction oxygen evolution reaction rechargeable Zn-air battery

Nanoporous nickel with rich adsorbed oxygen for efficient alkaline hydrogen evolution electrocatalysis

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Science China Materials 2022年第7期65卷 1825-1832页

作者： Qingfeng Hu Zelin Chen Jiajun Wang xuerong zheng Xiaopeng Han Yida Deng Wenbin Hu School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

Sluggish water dissociation kinetics severely limits the rate of alkaline electrocatalytic hydrogen evolution reaction(HER).Therefore,finding highly active electrocatalysts and clarifying the mechanism of water dissociation are challenging but *** this study,we report an integrated nanoporous nickel(np-Ni)catalyst with high alkaline HER performance and the origin of the corresponding enhanced catalytic *** 1 mol L^(-1) KOH solution,this np-Ni electrode shows an HER overpotential of 20 mV at 10 mA cm^(-2),along with fast water dissociation *** excellent performance is not only attributed to the large surface area provided by the three-dimensional interconnected conductive network but also from the enhanced intrinsic activity induced by the unique surface *** studies reveal that the types of oxygen species that naturally form on the Ni surface play a key role in water ***,when the lattice oxygen almost disappears,the Ni surface terminates with_(ads)orbed oxygen(O_(ads)),exhibiting the fastest water dissociation *** functional theory calculation suggests that when O_(ads)acts as the surface termination of Ni metal,the orientation and configuration of polar water molecules are strongly affected by O_(ads).Finally,the H–OH bond of interfacial water molecules is effectively activated in a manner similar to hydrogen *** work not only identifies a high-performance and low-cost electrocatalyst but also provides new insights into the chemical processes underlying water dissociation,thus benefiting the rational design of electrocatalysts.

关键词： alkaline hydrogen evolution water dissociation electron redistribution adsorbed oxygen hydrogen bond

Regeneration of spent cathodes of Li-ion batteries into multifunctional electrodes for overall water splitting and rechargeable Zn-air batteries by ultrafast carbothermal shock

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Science China Materials 2022年第9期65卷 2393-2400页

作者： xuerong zheng Xin Zhao Junda Lu Jihong Li zhengpei Miao Wei Xu Yida Deng Andrey L.Rogach State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Department of Materials Science and Engineering and Center for Functional Photonics(CFP)City University of Hong KongHong Kong S.A.R.999077China School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China Jiangsu Genox Environmental Engineering Technology Co. Ltd.Nanjing 210012China

Lithium-ion batteries(LIBs)are widely used in electric vehicles and consumer electronics and require reliable recycling *** this paper,we investigated how an ultrafast carbothermal shock treatment can be used to convert spent cathodes of LIBs(LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2))into Ni/Ni-Mn-Co-O(N/NMCO)composites with a remarkable electrocatalytic performance toward oxygen evolution,oxygen reduction,and hydrogen evolution *** converted spent cathodes can be employed as cathodes and anodes in an overall water-splitting system,and they displayed a low overpotential of 1.61 V and remarkable stability at different current ***,N/NMCO electrodes can be used as cathodes in rechargeable Zn-air batteries,which displayed long-term stability(>30 h),high specific capacity(781 mA h g^(-1))and peak power density(137 mW cm^(-2)),as well as a small charge/discharge voltage gap of 0.71 ***,our study offers a“waste-to-treasure”strategy for the regeneration of spent cathodes of LIBs and their applications in other advanced energy storage and conversion technologies.

关键词： lithium-ion battery waste management carbothermal shock overall water splitting Zn-air battery