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Nano Research 2024年第3期17卷 1182-1189页

作者： Tianqi Yu Kexin Tan Jia Wu Yongjin Zou shibin yin Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004China Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin 541004China

It is still a lack of bifunctional catalysts for ammonia oxidation reaction(AOR)and hydrogen evolution reaction(HER)due to their different reaction mechanisms.In this work,P is doped into PtZn alloy by calcination with NaH_(2)PO_(2) as P source to induce the lattice tensile strain of Pt and the electronic interaction between P and Zn,which optimizes the AOR and HER activity simultaneously.The sample with the optimal P content can drive the AOR peak current density of 293.6 mA·mgPt^(-1),which is almost 2.7 times of Pt.For HER,the overpotential at^(-1)0 mA·cm^(-2) is only 23 mV with Tafel slope of 34.1 mV·dec^(-1).Furthermore,only 0.59 V is needed to obtain 50 mA·mgPt^(-1) for ammonia electrolysis under a two-electrode system.Therefore,this work shows an ingenious method to design bifunctional catalysts for ammonia electrolysis.

关键词： PtZn alloy phosphorous doping ammonia oxidation reaction hydrogen evolution reaction bifunctional catalyst

Pyridinic-N doping carbon layers coupled with tensile strain of FeNi alloy for activating water and urea oxidation

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Green Energy & Environment 2024年第4期9卷 684-694页

作者： Guangfu Qian Wei Chen Jinli Chen Li Yong Gan Tianqi Yu Miaojing Pan Xiaoyan Zhuo shibin yin Guangxi Key Laboratory of Electrochemical Energy Materials College of Chemistry and Chemical EngineeringState Key Laboratory of Processing for Non-Ferrous Metal and Featured MaterialsGuangxi University100 Daxue RoadNanning530004China Institute for Structure and Function and Department of Physics Chongqing UniversityChongqing400030China

Exploitation of oxygen evolution reaction(OER)and urea oxidation reaction(UOR)catalysts with high activity and stability at large current density is a major challenge for energy-saving H_(2) production in water electrolysis.Herein,we use the pyridinic-N doping carbon layers coupled with tensile strain of FeNi alloy activated by NiFe_(2)O_(4)(FeNi/NiFe_(2)O_(4)@NC)for efficiently increasing the performance of water and urea oxidation.Due to the tensile strain effect on FeNi/NiFe_(2)O_(4)@NC,it provides a favorable modulation on the electronic properties of the active center,thus enabling amazing OER(η_(100)=196 mV)and UOR(E_(10)=1.32 V)intrinsic activity.Besides,the carbon-coated layers can be used as armor to prevent FeNi alloy from being corroded by the electrolyte for enhancing the OER/UOR stability at large current density,showing high industrial practicability.This work thus provides a simple way to prepare high-efficiency catalyst for activating water and urea oxidation.

关键词： Carbon-encapsulated Tensile strain Catalyst Oxygen evolution reaction Urea oxidation reaction

B and Fe co-doped Co_(2)P hollow nanocubes for nitrate electroreduction to ammonia

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Chinese Chemical Letters 2024年第2期35卷 278-282页

作者： Jing Miao Qingling Hong Liping Liang Guomin Li Zhihong Liu shibin yin Yu Chen School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China School of Materials Science and Engineering Shaanxi Normal UniversityXi'an 710062China School of Chemistry and Chemical Engineering Shaanxi Normal UniversityXi'an 710062China Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004China

Nitrate(NO_(3)^(−))electroreduction reaction(NO_(3)^(−)RR)provides an attractive and sustainable route for NO_(3)^(−)pollution mitigation or energy-saved ammonia(NH3)synthesis.In this work,high-quality B and Fe co-doped Co_(2) P hollow nanocubes(B/Fe-Co_(2) P HNCs)are successfully synthesized though simultaneous boronation-phosphorization treatment,which reveal outstanding selectivity,activity,stability for the NO_(3)^(−)to NH_(3) conversion in neutral electrolyte because of big surface area,fast mass transport,superhydrophilic surface,and optimized electronic structure.B/Fe-Co_(2) P HNCs can achieve the high NH3 yield rate(22.67 mg h^(−1) mg_(cat)^(−1))as well as Faradaic efficiency(97.54%)for NO_(3)^(−)RR,greatly outperforming most of non-precious metal based NO_(3)^(−)RR electrocatalysts.

关键词： Nitrate electroreduction reaction Ammonia synthesis Transition metal phosphides Hollow nanocubes

Three-Phase Heterojunction NiMo-Based Nano-Needle for Water Splitting at Industrial Alkaline Condition

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Nano-Micro Letters 2022年第1期14卷 325-339页

作者： Guangfu Qian Jinli Chen Tianqi Yu Jiacheng Liu Lin Luo shibin yin College of Chemistry and Chemical Engineering State Key Laboratory of Processing for Non-Ferrous Metal and Featured MaterialsGuangxi University100 Daxue RoadNanning 530004People’s Republic of China

Constructing heterojunction is an effective strategy to develop high-performance non-preciousmetal-based catalysts for electrochemical water splitting(WS).Herein,we design and prepare an N-doped-carbon-encapsulated Ni/MoO_(2) nano-needle with three-phase heterojunction(Ni/MoO_(2)@CN)for accelerating the WS under industrial alkaline condition.Density functional theory calculations reveal that the electrons are redistributed at the three-phase heterojunction interface,which optimizes the adsorption energy of H-and O-containing intermediates to obtain the best ΔG_(H*) for hydrogen evolution reaction(HER)and decrease the ΔG value of ratedetermining step for oxygen evolution reaction(OER),thus enhancing the HER/OER catalytic activity.Electrochemical results confirm that Ni/MoO_(2)@CN exhibits good activity for HER(ƞ_(-10)=33 mV,ƞ_(-1000)=267 mV)and OER(ƞ_(10)=250 mV,ƞ_(1000)=420 mV).It shows a low potential of 1.86 V at 1000 mA cm^(−2) for WS in 6.0 M KOH solution at 60℃ and can steadily operate for 330 h.This good HER/OER performance can be attributed to the three-phase heterojunction with high intrinsic activity and the self-supporting nano-needle with more active sites,faster mass diffusion,and bubbles release.This work provides a unique idea for designing high efficiency catalytic materials for WS.

关键词： Three-phase heterojunction Interfacial electronic redistribution Catalyst Large current density Water splitting

Coupling interface engineering with electronic interaction toward high-efficiency H_(2) evolution in pH-universal electrolytes

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Journal of Energy Chemistry 2023年第5期80卷 535-541,I0012页

作者： Jinli Chen Tianqi Yu Zhixiang Zhai Guangfu Qian shibin yin Guangxi Key Laboratory of Electrochemical Energy Materials College of Chemistry and Chemical EngineeringSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004GuangxiChina

Herein,the merits of heterojunction,CeO_(2),and W are employed to design and prepare the PtCoW@CeO_(2)heterojunction catalyst,which can accelerate water dissociation and improve the desorption of OHad,displaying efficient hydrogen evolution reaction(HER)performance in pH-universal conditions.Density functional theory calculation results reveal that the electronic structure of Pt is regulated by CeO_(2)and W,which tunes the Pt-Hadbond strength to boost HER intrinsic activity.Consequently,electrochemical results display that it has low potentials of-26,-25,and-23 mV at-10 mA cm^(-2)in alkaline,neutral,and acidic solutions,respectively,and it can stably cycle for 50,000 cycles.Thus,this work provides the guidance for developing high-performance Pt-based catalysts in pH-universal environments.

关键词： Heterojunction Heteroatom-doping Water dissociation pH-universal Hydrogen evolution reaction

NiCo alloy nanoparticles anchored on mesoporous Mo_(2)N nanosheets as efficient catalysts for 5-hydroxymethylfurfural electrooxidation and hydrogen generation

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Chinese Journal of Structural Chemistry 2023年第10期42卷 28-36页

作者： Ke Wang Jia Wu Shuyi Zheng shibin yin Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry and Chemical EngineeringGuangxi University100 Daxue RoadNanning530004China

Construction of highly active and stable bifunctional catalysts for 5-hydroxymethylfurfural oxidation reaction(HMFOR)and hydrogen evolution reaction(HER)is meaningful but remains a challenge.Herein,the NiCo–Mo_(2)N heterostructure nanosheets catalyst with excellent HMFOR/HER performance is obtained by a simple hydrothermal and calcination method.The heterogeneous interface between NiCo and Mo_(2)N induces electron redistribution,regulating the electronic structure of the catalyst and thus optimizing the adsorption/desorption behavior of HMFOR/HER intermediates.Consequently,NiCo–Mo_(2)N/NF exhibits superior catalytic activity with a potential of 1.14 V_(RHE)/−17 mV_(RHE)(HMFOR/HER)at±10 mA cm^(−2),and the HMF conversion rate,FDCA yield,and Faradaic efficiency(FE)are∼100%,99.98%,and 98.65%,respectively.Besides,it only requires a low voltage of 1.36 V to achieve 100 mA cm^(−2)for HMFOR-assisted H2 production.This study provides a strategy for the development of efficient bifunctional catalysts for sustainable production of high value-added products and hydrogen.

关键词： 5-Hydroxymethylfurfural electrooxidation Catalyst Transition metal nitride Mesoporous Biomass conversion

Strong electronic coupling of CoNi and N-doped-carbon for efficient urea-assisted H2 production at a large current density

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Carbon Energy 2023年第12期5卷 187-199页

作者： Guangfu Qian Jinli Chen Wenjie Jiang Tianqi Yu Kexin Tan shibin yin Guangxi Key Laboratory of Electrochemical Energy Materials College of Chemistry and Chemical EngineeringCollege of Light Industry and Food EngineeringGuangxi UniversityNanningChina

Exploiting efficient urea oxidation reaction(UOR)and hydrogen evolution reaction(HER)catalysts are significant for energy-saving H2 production through urea-assisted water electrolysis,but it is still challenging.Herein,carbon-encapsulated CoNi coupled with CoNiMoO(CoNi@CN-CoNiMoO)is prepared by solvothermal method and calcination to enhance the activity/stability of urea-assisted water electrolysis at large current density.It exhibits good activity for UOR(E10/1,000=1.29/1.40 V)and HER(E-10/-1000=-45/-245 mV)in 1.0 M KOH+0.5 M urea solution.For the UOR||HER system,CoNi@CN-CoNiMoO only needs 1.58 V at 500 mA cm-2 and shows good stability.Density functional theory calculation suggests that the strong electronic interaction at the interface between NiCo alloy and N-doping-carbon layers can optimize the adsorption/desorption energy of UOR/HER intermediates and accelerate the water dissociation,which can expedite urea decomposition and Volmer step,thus increasing the UOR and HER activity,respectively.This work provides a new solution to design UOR/HER catalysts for H2 production through urea-assisted water electrolysis.

关键词： carbon-encapsulated structure catalyst hydrogen production large current density urea-assisted water electrolysis

Fault Diagnosis and Separation for a Distributed Rotary-laser Scanning System

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Journal of Geodesy and Geoinformation Science 2023年第4期6卷 70-78页

作者： Siyang GUO yin GUO shibin yin Hongbo XIE Jigui ZHU Isvision(Hangzhou)Technology Company Limited Hangzhou 310000China School of Precision Instrument and Opto-electronics Engineering Tianjin UniversityTianjin 300072China

The wMPS is a laser-based measurement system used for large scale metrology.However,it is susceptible to external factors such as vibrations,which can lead to unreliable measurements.This paper presents a fault diagnosis and separation method which can counter this problem.To begin with,the paper uses simple models to explain the fault diagnosis and separation methods.These methods are then mathematically derived using statistical analysis and the principles of the wMPS.A comprehensive solution for fault diagnosis and separation is proposed,considering the characteristics of the wMPS.The effectiveness of this solution is verified through experimental observations.It can be concluded that this approach can detect and separate false observations,thereby enhancing the reliability of the wMPS.

关键词： rotary-laser scanning measurement system least square method fault diagnosis fault separation

Modulating metal-support interaction between Pt_(3)Ni and unsaturated WOx to selectively regulate the ORR performance

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Chinese Journal of Structural Chemistry 2023年第10期42卷 46-53页

作者： Jinli Chen Shouquan Feng Tianqi Yu Yongjin Zou Huan Wen shibin yin Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry and Chemical EngineeringGuangxi UniversityNanning530004China Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin541004China

Tuning strong metal-support interaction between Pt-based alloys and metal oxides is an effective strategy for modulating the performance of oxygen reduction reaction(ORR).Herein,Pt_(3)Ni alloy anchored on WO_(x) with different content of oxygen vacancies is synthesized,and the effect of unsaturated WO_(x) on ORR activity/stability is revealed.Electrochemical results indicate that ORR activity is positively correlated with oxygen vacancy concentration,while durability presents the opposite trend.Density functional theory(DFT)calculation results suggest that controlling the content of oxygen vacancies can usefully adjust the charge redistribution between Pt_(3)Ni and WO_(x),which can optimize the adsorption/activation of reactants,thus obtaining good ORR activity.This study uncovers the effect of unsaturated WO_(x) on ORR performance for Pt-based alloys and provides a promising strategy to design efficient and stable ORR catalysts.

关键词： Oxygen vacancies Catalyst Oxygen reduction reaction Strong metal support interaction Density functional theory calculation

Tailoring the selective adsorption sites of NiMoO by Ni particles for biomass upgrading assisted hydrogen production

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Journal of Energy Chemistry 2023年第11期86卷 480-489,I0010页

作者： Jia Wu Zhixiang Zhai Tianqi Yu Xizi Wu Shuaiqin Huang Wenqing Cao Yixuan Jiang Jinge Pei shibin yin Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry and Chemical EngineeringSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004GuangxiChina

5-Hydroxymethylfurfural electrooxidation reaction(HMFOR)is a promising route to produce valueadded chemicals from biomass.Since it involves HMF adsorption and C-H/O-H cleavage,understanding the adsorption behavior and catalytic process of organic molecules on catalysts is important.Herein,the selective adsorption sites of NiMoO are tuned by Ni particles for HMFOR-assisted H2production.Experimental and theoretical calculation results indicate that the synergistic interaction between Ni and NiMoO optimizes the adsorption/desorption of HMF/intermediates/2,5-furandicarboxylic acid(FDCA)and promotes the C-H/O-H bond cleavage,thereby improving the HMFOR kinetics(kNiMoO-Ni/kNiMoO=1.97)and FDCA selectivity(99.3%).When coupled as a two-electrode system,it can drive efficient HMF conversion(FDCA yield:98.5%)and H2production(Faradaic efficiency:99.1%)at 1.45 V.This work thus offers a strategy to tune the adsorption sites of catalyst for efficient HMFOR-assisted H2production.

关键词： 5-Hydroxymethylfurfural electrooxidation Hydrogen evolution reaction Kinetics Nanowires Catalyst