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Engineering active sites of cathodic materials for high-performance Zn-nitrogen batteries

Nano Research 2023年第7期16卷 9214-9230页

作者： Shanshan Chen Kang Lian Wenxian Liu Qian liu Gaocan Qi Jun Luo Xijun liu Institute for New Energy Materials and Low-Carbon Technologies Tianjin Key Lab for Photoelectric Materials&DevicesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures School of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Institute for Advanced Study Chengdu UniversityChengdu 610106China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110China

As an ideal carbon-free energy carrier,ammonia plays an indispensable role in modern society.The conventional industrial synthesis of NH3 by the Haber-Bosch technique under harsh reaction conditions results in serious energy consumption and environmental pollution.Therefore,it is essential to develop NH3 synthesis tactics under benign conditions.Electrochemical synthesis of NH_(3) has the advantages of mild reaction conditions and environmental friendliness,and has become a hotspot for research in recent years.It has been reported that zinc-nitrogen batteries(ZNBs),such as Zn-N_(2),Zn-NO,Zn-NO_(3)^(-),and Zn-NO_(2)^(-)batteries,can not only reduce nitrogenous species to ammonia but also have concomitant power output.However,the common drawbacks of these battery systems are unsatisfactory power density and ammonia production.In this review,the latest progress of ZNBs including the reaction mechanism of the battery and reactor design principles is systematically summarized.Subsequently,active site engineering of cathode catalysts is discussed,including vacancy defects,chemical doping,and heterostructure engineering.Finally,some insights are provided to improve the performance of ZNBs from a practical perspective of view.

关键词： Zn-nitrogen batteries nitrogen reduction electrocatalysis ammonia synthesis aqueous battery

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Active-site and interface engineering of cathode materials for aqueous Zn–gas batteries

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Nano Research 2023年第2期16卷 2325-2346页

作者： Wenxian Liu Jinxiu Feng Tianran Wei Qian liu Shusheng Zhang Yang Luo Jun Luo Xijun liu College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Ministry of Education(MOE)Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of ResourceEnvironmentsand MaterialsGuangxi UniversityNanning 530004China Institute for Advanced Study Chengdu UniversityChengdu 610106China College of Chemistry Zhengzhou UniversityZhengzhou 450000China Empa Swiss Federal Laboratories for Materials Science and TechnologySwiss Federal Institute of Technology in Zurich(ETH)DomainDübendorf CH-8600Switzerland Hong Kong Productivity Council(HKPC) Hong Kong 999077China School of Materials Science and Engineering Tianjin University of TechnologyTianjin 300384China

Aqueous rechargeable Zn–gas batteries are regarded as promising energy storage and conversion devices due to their high safety and inherent environmental friendliness.However,the energy efficiency and power density of Zn–gas batteries are restricted by the kinetically sluggish cathode reactions,such as oxygen evolution reaction(OER)during charging and oxygen reduction reaction(ORR)/carbon dioxide reduction reaction(CO_(2)RR)/nitrogen reduction reaction(NRR)/nitric oxide reduction reaction(NORR)during discharge.In this review,battery configurations and fundamental reactions in Zn–gas batteries are first introduced,including Zn–air,Zn-CO_(2),Zn-N_(2),and Zn-NO batteries.Afterward,recent advances in active site engineering for enhancing the intrinsic catalytic activities of cathode catalysts are summarized.Subsequently,the structure and surface regulation strategies of cathode materials for optimizing the three-phase interface and improving the performance of Zn–gas batteries are discussed.Finally,some personal perspectives for the future development of Zn–gas batteries are presented.

关键词： Zn–gas batteries electrocatalysis single-atom catalysts chemical doping heterostructure interface

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Coupling Co-Ni phosphides for energy-saving alkaline seawater splitting

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Nano Research 2024年第6期17卷 4797-4806页

作者： Weijia liu Wenxian Liu Tong Hou Junyang Ding Zhigui Wang Ruilian Yin Xingyuan San Ligang Feng Jun Luo Xijun liu State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured MaterialsMOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Hebei Key Laboratory of Optic-electronic Information and Materials the College of Physics Science and TechnologyHebei UniversityBaoding 071002China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110China

The coupling of energy-saving small molecule conversion reactions and hydrogen evolution reaction(HER)in seawater electrolytes can reduce the energy consumption of seawater electrolysis and mitigate chlorine corrosion issues.However,the fabrication of efficient multifunctional catalysts for this promising technology is of great challenge.Herein,a heterostructured catalyst comprising CoP and Ni_(2)P on nickel foam(CoP/Ni_(2)P@NF)is reported for hydrazine oxidation(HzOR)-assisted alkaline seawater splitting.The coupling of CoP and Ni_(2)P optimizes the electronic structure of the active sites and endows excellent electrocatalytic performance for HzOR and HER.Impressively,the two-electrode HzOR-assisted alkaline seawater splitting(OHzS)cell based on the CoP/Ni_(2)P@NF required only 0.108 V to deliver 100 mA·cm^(−2),much lower than 1.695 V for alkaline seawater electrolysis cells.Moreover,the OHzS cell exhibits satisfactory stability over 48 h at a high current density of 500 mA·cm^(−2).Furthermore,the CoP/Ni_(2)P@NF heterostructured catalyst also efficiently catalyzed glucose oxidation,methanol oxidation,and urea oxidation in alkaline seawater electrolytes.This work paves a path for high-performance heterostructured catalyst preparation for energy-saving seawater electrolysis for H_(2) production.

关键词： seawater splitting heterostructure electrocatalysis hydrazine oxidation reaction hydrogen evolution reaction

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A novel strategy for the construction of silk fibroin–SiO_(2)composite aerogel with enhanced mechanical property and thermal insulation performance

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Frontiers of Chemical Science and Engineering 2023年第3期17卷 288-297页

作者： Weixin liu Bo Yin Jie Zhang Xingping liu wenxian Lian Shaokun Tang Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering&TechnologyTianjin UniversityTianjin 300350China Xinte Energy Co. Ltd.Urumqi City 831499China

The practical application of silica aerogels is an enormous challenge due to the difficulties in improving both mechanical property and thermal insulation performance.In this work,silk fibroin was used as scaffold to improve the mechanical property and thermal insulation performance of silica aerogels.The ungelled SiO_(2)precursor solution was impregnated into silk fibroin to prepare silk fibroin-SiO_(2)composite aerogels via sol−gel method followed by freeze-drying.By virtue of the interfacial hydrogen-bonding interactions and chemical reactions between silk fibroin and silica nanoparticles,SiO_(2)was well-dispersed in the silk fibroin aerogel and composite aerogels exhibited enhanced mechanical property.By increasing the loading of silk fibroin from 15 wt%to 21 wt%,the maximum compressive stress was enhanced from 0.266 to 0.508 MPa when the strain reached 50%.The thermal insulation performance of the composite aerogels was improved compared with pure silica aerogel,as evidenced that the thermal conductivity was decreased from 0.0668 to 0.0341 W∙m‒1∙K‒1.Moreover,the composite aerogels exhibited better hydrophobicity and fire retardancy compared to pure silica aerogel.Our work provides a novel approach to preparing silk fibroin-SiO_(2)composite aerogels with enhanced mechanical property and thermal insulation performance,which has potential application as thermal insulation material.

关键词： silica aerogel silk fibroin impregnation thermal insulation mechanical property

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Discovery of orthorhombic perovskite oxides with low thermal conductivity by first-principles calculations

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Journal of Advanced Ceramics 2022年第10期11卷 1596-1603页

作者： Yuchen liu Kaili CHU Yu ZHOU Yiran LI wenxian LI Bin liu Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China School of Materials Science and Engineering University of New South WalesSydney 2052Australia

Orthorhombic perovskite oxides are studied by high-throughput first-principles calculations to explore new thermal barrier coating(TBC)materials with low thermal conductivities.The mechanical and thermal properties are predicted for 160 orthorhombic perovskite oxides.The average atomic volume is identified as a possible predictor of the thermal conductivity for the perovskite oxides,as it has a good correlation with the thermal conductivity.Five compounds,i.e.,LaTmO_(3),LaErO_(3),LaHoO_(3),SrCeO_(3),and SrPrO_(3),having thermal conductivities under 1 W·m^(-1)·K^(-1) and good damage tolerance,are proposed as novel TBC materials.The obtained data are expected to inspire the design of perovskite oxide-based TBC materials and also support their future functionality investigations.

关键词： first-principles calculations perovskite oxide thermal conductivity mechanical property

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M2C-GVIO:motion manifold constraint aided GNSS-visual-inertial odometry for ground vehicles

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Satellite Navigation 2023年第1期4卷 77-91,I0003页

作者： Tong Hua Ling Pei Tao Li Jie Yin Guoqing liu wenxian Yu Shanghai Key Laboratory of Navigation and Location Based Services Shanghai Jiao Tong UniversityShanghaiChina

Visual-Inertial Odometry(VIO)has been developed from Simultaneous Localization and Mapping(SLAM)as a lowcost and versatile sensor fusion approach and attracted increasing attention in ground vehicle positioning.However,VIOs usually have the degraded performance in challenging environments and degenerated motion scenarios.In this paper,we propose a ground vehicle-based VIO algorithm based on the Multi-State Constraint Kalman Filter(MSCKF)framework.Based on a unifed motion manifold assumption,we derive the measurement model of manifold constraints,including velocity,rotation,and translation constraints.Then we present a robust flter-based algorithm dedicated to ground vehicles,whose key is the real-time manifold noise estimation and adaptive measurement update.Besides,GNSS position measurements are loosely coupled into our approach,where the transformation between GNSS and VIO frame is optimized online.Finally,we theoretically analyze the system observability matrix and observability measures.Our algorithm is tested on both the simulation test and public datasets including Brno Urban dataset and Kaist Urban dataset.We compare the performance of our algorithm with classical VIO algorithms(MSCKF,VINS-Mono,R-VIO,ORB_SLAM3)and GVIO algorithms(GNSS-MSCKF,VINS-Fusion).The results demonstrate that our algorithm is more robust than other compared algorithms,showing a competitive position accuracy and computational efciency.

关键词： Sensor fusion Visual-inertial odometry Motion manifold constraint

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Circulate shifted OFDM chirp waveform diversity design with digital beamforming for MIMO SAR

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Science China(Information Sciences) 2017年第10期60卷 217-228页

作者： Shangwen liu Zenghui ZHANG wenxian YU Shanghai Key Laboratory of Intelligent Sensing and Recognition Shanghai Jiao Tong University

Waveform diversity design has always been the key to multiple-input multiple-output(MIMO)synthetic aperture radar(SAR) systems, and it is known that synthetic integral side lobe ratio(SISLR) is a more optimal indicator than the integral side lobe ratio(ISLR) to evaluate the orthogonality between different MIMO SAR waveforms. This paper presents proof that it is difficult to obtain the SISLR of an existing waveform such that it is sufficiently low to achieve high SNR for SAR imaging. Thus, it is necessary to find a way to separate these MIMO SAR waveforms in other domains, for example, a spatial domain by digital beamforming(DBF). Learning from Krieger’s idea of short-term shift-orthogonal waveforms and using joint time-frequency transforms(Gabor transform) to prove that for most existing SAR waveforms cyclic shift is a good operation with which to generate short-term shift-orthogonal waveforms. This paper presents the designs of four circulate shifted OFDM chirp waveforms, which have a much lower SISLR and retain all the advantages of the classical chirp waveform such as a large time-bandwidth product, constant amplitude, implementation simplicity, and good Doppler tolerance.

关键词： MIMO SAR Gabor transform cyclic shift OFDM chirp waveform synthetic integral side lobe ratio(SISLR)

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Non-noble-metal electrocatalysts for oxygen evolution reaction toward seawater splitting: A review

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ChemPhysMater 2023年第3期2卷 185-196页

作者： Zhengguang Qin Wenxian Liu Wenbin Que Jinxiu Feng Wenhui Shi Fangfang Wu Xiehong Cao College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014China Center for Membrane and Water Science&Technology College of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China

The direct electrolytic splitting of abundant seawater instead of scarce freshwater is an ideal strategy for producing clean and renewable hydrogen(H 2)fuels.The oxygen evolution reaction(OER)is a vital half-reaction that occurs during electrochemical seawater splitting.However,OER suffers from sluggish four-electron transfer kinetics and competitive chlorine evolution reactions in seawater.Noble metal-based catalysts such as IrO_(2) and RuO_(2) are considered to have state-of-the-art OER electrocatalytic activity,but the low reserves and high prices of these noble metals significantly limit their large-scale application.Recently,efforts have been made to explore efficient,robust,and anti-chlorine-corrosion non-noble-metal OER electrocatalysts for seawater splitting such as oxides,hydroxides,phosphides,nitrides,chalcogenides,alloys,and composites.An in-depth understanding of the fundamentals of seawater electrolysis and the design principle of electrode materials is important for promoting seawater-splitting technology.In this review,we first introduce fundamental reactions in seawater electrolytes.Subsequently,construction strategies for OER electrocatalysts for seawater splitting are introduced.Finally,present challenges and perspectives regarding non-noble-metal OER electrocatalysts for commercial H 2 production by seawater splitting are discussed.

关键词： Non-noble metals OER electrocatalyst Seawater splitting Chlorine evolution reactions

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Single-cell RNA-seq analysis of testicular somatic cell development in pigs

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Journal of Genetics and Genomics 2022年第11期49卷 1016-1028页

作者： Lingkai Zhang Ming Guo Zidong liu Ruifang liu Yi Zheng Taiyong Yu Yinghua Lv Hongzhao Lu wenxian Zeng Tao Zhang Chuanying Pan College of Animal Science and Technology Northwest A&F UniversityYanglingShaanxi 712100China College of Chemistry and Pharmacy Northwest A&F UniversityYanglingShaanxi 712100China School of Biological Science and Engineering Shaanxi University of TechnologyHanzhongShaanxi 723001China

Spermatogenesis is the process by which diploid male germ cells propagate and differentiate into haploid flagellated spermatozoa.This highly complicated process is dependent on testicular somatic cells maturation.While the role of these somatic cells in spermatogenesis is relatively well established,knowledge about their development and maturation,particularly at the molecular level,is limited.In this study,we profiled the testicular single-cell transcriptomes of Guanzhong black pigs at the age of 7,30,60,90,and 150 days.Five types of Sertoli cells,five types of Leydig cells,and four types of peritubular myoid cells were identified.Histological analysis revealed the changes in proliferation levels and marker gene expressions,and the prion-like protein gene(PRND)was identified as a novel marker for Sertoli cells.Additionally,integrated analyses of porcine and human datasets revealed similarities between human and pig testicular somatic cells.Overall,the data obtained in this study contribute to the understanding of testicular development in pigs as a model species.

关键词： Pigs scRNA-seq Testis somatic cells Puberty

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R绘图引导模式促进草业科学专业编程教学的探索与实践

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草业科学 2021年第3期38卷 598-604页

作者：刘文献兰州大学草地农业生态系统国家重点实验室/甘肃省西部草业技术创新中心/兰州大学农业农村部草牧业创新重点实验室/兰州大学草地农业教育部工程研究中心/兰州大学草地农业科技学院甘肃兰州730020

在生物大数据时代的背景下,加强草业科学专业学生利用编程语言进行大数据处理及可视化分析对提高学生综合素质及科研能力都具有十分重要的现实意义。然而,目前我国高校对非计算机类专业学生编程能力的培养仍存在重视程度不够及教学效果... 详细信息

在生物大数据时代的背景下,加强草业科学专业学生利用编程语言进行大数据处理及可视化分析对提高学生综合素质及科研能力都具有十分重要的现实意义。然而,目前我国高校对非计算机类专业学生编程能力的培养仍存在重视程度不够及教学效果不佳等问题。如何引导学生快速构建编程知识体系是目前高校信息学课程改革面临的主要问题之一。笔者根据多年的教学、科研实践,紧紧围绕学生编程基础差、学习兴趣不高等关键问题,提出以R语言科研绘图为引导,从教学导向、学习内容、教学模式、深入学习机制等多个方面共同构建针对草业科学专业学生学研一体的编程教学新模式。实践证明,该教学模式能有效克服学生对编程的畏惧心理,激发学生对编程学习的潜能和兴趣,有效提高了教学质量和效果,可为学生后期自主深入学习编程打下良好基础。

关键词：编程教学 R语言教学模式科研绘图

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