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One-step synthesis of N,p co-doped porous carbon electrocatalyst for highly efficient nitrogen fixation

Nano Research 2022年第3期15卷 1779-1785页

作者： Sijia Zhao Jin Wang peng Wang Shuang Wang Jinping Li college of Environmental Science and Engineering Taiyuan University of TechnologyJinzhong 030600China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan University of TechnologyTaiyuan 030024China

Heteroatom-doped porous carbon has attracted many researchers’interests owing to their hierarchical porous and more active sites for nitrogen reduction reaction(NRR).However,the development of simple synthesis strategies to fabricate efficient catalyst is still remaining a *** this work,a series of N,p co-doped porous carbon were prepared by one-step pyrolysis of zeolitic imidazolate framework(ZIF-8)and triphenylphosphine(Tpp)under nitrogen *** obtained catalyst by calcinating ZIF-8 and Tpp with the mass ratio of 1:5 for three hours was named as pN-C-ZIF-8,which exhibited a high yield rate of ammonia(43.39μg·h^(–1)·mg^(–1)cat.)and Faraday efficiency(16.67%)in 0.05 M H2SO4 at–0.3 *** importantly,the pN-C-ZIF-8 catalyst had superior selectivity that no hydrazine by-products were detected and long-term durability for 72 *** study provides an idea for the convenient design and preparation of heteroatom doped carbon materials.

关键词： N p co-doped carbon-based catalyst electrochemical ammonia synthesis metal organic framework pyrolysis

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Experimental design and theoretical evaluation of nitrogen and phosphorus dual-doped hierarchical porous carbon for high-performance sodium-ion storage

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Journal of Materials Science & Technology 2021年第17期76卷 11-19页

作者： Chen Chen Ying Huang Zhuoyue Meng Mengwei Lu Zhipeng Xu panbo Liu Tiehu Li MOE Key Laboratory of Material physics and Chemistry Under Extraordinary conditions School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'an710072China college of Chemistry&Chemical Engineering Xi'an University of Science and TechnologyXi'an710072China Shaanxi Joint Laboratory of Graphene Northwestern Polytechnical UniversityXi'an710072China

Starch has a wide range of sources and can be used as a high-quality precursor for sodium-ion battery anode ***,the carbonization yield and specific capacity of carbon materials obtained by directly pyrolyzing starch are ***,starch is used as the carbon source,and ammonium polyphosphate(App)is used as the cross-linking agent and dopant to prepare a nitrogen and phosphorus co-doped porous carbon(NppC).As the anode for sodium-ion batteries,NppC-2 exhibits a high reversible capacity of 385.8 mAhg^(-1)at 50 mAg^(-1).Even after 1000 cycles at a large current density of 5 Ag^(-1),the reversible capacity can still be maintained at 126.9 mAhg^(-1).Based on detailed data and first-principles calculations,the excellent performance of NppC is due to the effective doping of nitrogen and phosphorus elements,which distorts the graphite sheet,introduces defects,and increases the graphite layer spacing,thereby enhancing the adsorption capacity of the carbon material for sodium ions,reducing the diffusion barrier of sodium *** work provides a new idea for heteroatom doping and carbon material modification.

关键词： Ammonium polyphosphate Starch N p co-doped Anode Sodium-ion battery

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Bismuth stabilized by ZIF derivatives for electrochemical ammonia production:proton donation effect of phosphorus dopants

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Nano Research 2023年第4期16卷 4574-4581页

作者： Qiaoling Wu Ying Sun Qin Zhao Hui Li Zhengnan Ju Yu Wang Xiaodong Sun Baohua Jia Jieshan Qiu Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning ProvinceCollege of ChemistryLiaoning UniversityShenyang 110036China School of Science RMIT UniversityMelbourneVIC 3000Australia college of Chemical Engineering State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing 100029China

N2 electroreduction reaction(NRR)offers a feasible and promising alternative for NH_(3)production by using clean energy ***,it is still obstructed by the pretty low NH3 yield rate and Faradaic efficiency(FE)primarily due to the undesired competing hydrogen evolution reaction and the extremely stable N≡N ***,bismuth nanoparticles were successfully embedded in N and p co-doped carbon nanoflakes(Bi/NpC)by high-temperature pyrolyzation of Bi-zeolitic imidazole frameworks(ZIF)followed by phosphorization,and used as a high-efficiency catalyst toward N2 electroreduction to *** 0.1 M KHco_(3)electrolyte,Bi/NpC exhibits excellent NRR performances,including a high NH3 yield rate of 3.12μg·h^(−1)·cm^(−2)(−0.6 V *** hydrogen electrode(RHE)),an outstanding FE of 13.58%(−0.4 V ***),and a remarkable stability up to 36 h under ambient *** outstanding NRR catalytic activity is mainly attributed to the intrinsic electrocatalytic NRR activity combined with the inert hydrogen evolution reaction(HER)activity of Bi,the adsorption and activation of N2 facilitated by N dopants,as well as the superior conductivity and the large specific surface area of the two-dimensional layered carbon ***,the hydrogen source provided by p dopant promotes the hydrogenation of the adsorbed N,which further boosts the NRR performance in alkaline *** ultralong durability of Bi/NpC is attributed to the highly dispersed bismuth catalytic active centers confined in the skeleton of N and p co-doped carbon nanoflakes,which inhibits the agglomeration of bismuth *** work presents a novel avenue for designation and fabrication of high-performance Bi-based electrocatalysts for NRR.

关键词： N2 reduction bismuth N p co-doped carbon nanoflakes electrocatalysis

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