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Self-supported metal(Fe, Co, Ni)-embedded nitrogen-doping carbon nanorod framework as trifunctional electrode for flexible Zn-air batteries and switchable water electrolysis 被引量:1
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作者 qiuyan jin Liping Xiao +2 位作者 Weidong He Hao Cui Chengxin Wang 《Green Energy & Environment》 SCIE EI CAS CSCD 2023年第6期1644-1653,共10页
To meet the practical demand of wearable/portable electronics, developing high-efficiency and durable multifunctional catalyst and in-situ assembling catalysts into electrodes with flexible features are urgently neede... To meet the practical demand of wearable/portable electronics, developing high-efficiency and durable multifunctional catalyst and in-situ assembling catalysts into electrodes with flexible features are urgently needed but challenging. Herein, we report a simple route to fabricate bendable multifunctional electrodes by in-situ carbonization of metal ion absorbed polyaniline precursor. Alloy nanoparticles encapsulated in graphite layer are uniformly distributed in the N-doping carbon nanorod skeleton. Profiting from the favorable free-standing structure and the cooperative effect of metallic nanoparticles, graphitic layer and N doped-carbon architecture, the trifunctional electrodes exhibit prominent activities and stability toward HER, OER and ORR. Notably, due to the protection of carbon layer, the electrocatalysts show the reversible catalytic HER/OER properties. The overall water splitting device can continuously work for 12 h under frequent exchanges of cathode and anode. Importantly, the bendable metal air batteries fabricated by self-supported electrode not only displays the outstanding battery performance,achieving a decent peak power density(125 mW cm^(-2)) and exhibiting favorable charge-discharge durability of 22 h, but also holds superb flexible stability. Specially, a lightweight self-driven water splitting unit is demonstrated with stable hydrogen production. 展开更多
关键词 Trifunctional catalysts Self-supported electrodes Switchable water splitting Flexible Zn-air battery Self-powered system
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A fast and in-depth self-reconstruction of anion ligands optimized CoFe-based pre-catalysts for water oxidation 被引量:1
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作者 qiuyan jin Hao Cui Chengxin Wang 《Green Energy & Environment》 SCIE EI CAS CSCD 2023年第3期812-819,共8页
The design of efficient and robust non-precious metal electrocatalysts towards oxygen evolution reaction(OER)is of great value for developing green energy technologies.The in-situ formed high-valence(oxy)hydroxides sp... The design of efficient and robust non-precious metal electrocatalysts towards oxygen evolution reaction(OER)is of great value for developing green energy technologies.The in-situ formed high-valence(oxy)hydroxides species during the reconstruction process of pre-catalysts are recognized as the real contributing sites for OER.However,pre-catalysts generally undergo a slow and inadequate self-reconstruction.Herein,we reported a PO^(3-)_(4)optimized CoFe-based OER catalysts with amorphous structure,which enables a fast and deep reconstruction during the OER process.The amorphous structure induced by ligands PO^(3-)_(4)is prone to evolution and further form active species for OER.The electron interaction between metal sites can be modulated by electron-rich PO^(3-)_(4),which promotes generation of high active CoOOH.Simultaneously,the etching of PO^(3-)_(4)from the pre-catalysts during the catalytic process is in favor of accelerating the self-reconstruction.As a result,as-prepared precatalyst can generate high active CoOOH at a low potential of 1.4 V and achieve an in-depth reconstructed nanosheet structure with abundant OER active sites.Our work provides a promising design of pre-catalysts for realizing efficient catalysis of water oxidation. 展开更多
关键词 Oxygen evolution reaction Pre-catalysts Reconstruction Anion ligands Bimetallic catalysts
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The Exact Solution of the Space-Time Fractional Modified Kdv-Zakharov-Kuznetsov Equation
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作者 qiuyan jin Tiecheng Xia jinbo Wang 《Journal of Applied Mathematics and Physics》 2017年第4期844-852,共9页
In this paper, we get many new analytical solutions of the space-time nonlinear fractional modified KDV-Zakharov Kuznetsov (mKDV-ZK) equation by means of a new approach namely method of undetermined coefficients based... In this paper, we get many new analytical solutions of the space-time nonlinear fractional modified KDV-Zakharov Kuznetsov (mKDV-ZK) equation by means of a new approach namely method of undetermined coefficients based on a fractional complex transform. These solutions have physics meanings in natural sciences. This method can be used to other nonlinear fractional differential equations. 展开更多
关键词 Analytical Solutions the SPACE-TIME FRACTIONAL MODIFIED KDV-ZK EQUATION Nonlinear FRACTIONAL Differential EQUATION MODIFIED Riemann-Liouville Derivative
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Hierarchical assembly of uranyl metallacycles involving macrocyclic hosts
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作者 Yuanyuan Liang Lei Mei +6 位作者 qiuyan jin Junshan Geng jingyang Wang Kang Liu Kongqiu Hu Jipan Yu Weiqun Shi 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第7期3539-3542,共4页
Actinide metallacycles are an emerging class of functional coordination assemblies,but multi-level assembly from metallacycle units toward hierarchical supramolecular structures are still rarely investigated.In this w... Actinide metallacycles are an emerging class of functional coordination assemblies,but multi-level assembly from metallacycle units toward hierarchical supramolecular structures are still rarely investigated.In this work,we put forward a novel supramolecular inclusion-based method through introducing two macrocyclic hosts,cucurbit[7]uril(CB[7])and cucurbit[8]uril(CB[8])to facilitate hierarchical assembly of uranyl metallacycles with higher complexity,and successfully prepare two different kinds of uranyl metallacycle-based complexes with intriguing hierarchical structures,a CB[7]-based four-member molecular necklace([4]MN)and a CB[8]-involved ring-in-ring supramolecular polymer chain.The results obtained here prove the feasibility of supramolecular inclusion for regulating coordination assembly of uranyl metallacycles and related hierarchical structures.It is believed that this method can be used to achieve the construction of actinide coordination assemblies with higher structural complexity. 展开更多
关键词 METALLACYCLE Coordination self-assembly URANYL CUCURBITURIL Hierarchical structure Molecular necklace
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