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Chinese Journal of Chemical Engineering 2020年第1期28卷 191-197页

作者： Yonghui Dou huanxin li Xiaoqiang Gao Guoji liu li Xu School of Chemical Engineering and Energy Zhengzhou UniversityZhengzhou 450001China

In this study, the LLE data of ternary system(water + 1,6-diaminohexane + 2-methyl-1-propanol) and(water +1,6-diaminohexane + 3-methyl-1-butanol) were measured at 293.15, 303.15 and 313.15 K under atmospheric pressure. Reliability of the experimental tie-line data was checked by empirical Hand, Othmer-Tobias and Bachman equations. Distribution coefficient(D) and selectivity(S) were calculated in order to investigate capability of the studied organic solvents for 1,6-diaminohexane extraction. The high values of separation factors demonstrated that 2-methyl-1-propanol and 3-methyl-1-butanol were applicable for this purpose. The experimental data were correlated by nonrandom two-liquid(NRTL) and universal quasi-chemical(UNIQUAC) *** percent-root-mean-square deviation(RMSD) values for NRTL and UNIQUAC models were less than 0.15,which indicated that the experimental data have been sufficiently correlated.

关键词： liquid–liquid equilibrium 1,6-Diaminohexane 2-Methyl-1-propanol 3-Methyl-1-butanol NRTL UNIQUAC

Rational design of vitamin C/defective carbon van der Waals heterostructure for enhanced activity,durability and storage stability toward oxygen reduction reaction

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Journal of Energy Chemistry 2024年第1期88卷 103-111,I0003页

作者： Ruiqi Cheng Kaiqi li huanxin li Tianshuo Zhao Yibo Wang Qingyue Xue Jiao Zhang Chaopeng Fu Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Christopher Ingold Laboratory Department of ChemistryUniversity College LondonLondon WC1H 0AJUK Department of Chemistry Physical&Theoretical Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxford OX13QZUK

Metal-free defective carbon materials with abundant active sites have been widely studied as low-cost and efficient oxygen reduction reaction(ORR)electrocatalysts in metal-air ***,the active sites in defective carbon are easily subjected to serious oxidation or hydroxylation during ORR or storage,leading to rapid degradation of ***,we design a van der Waals heterostructure comprised of vitamin C(VC)and defective carbon(DC)to not only boost the activity but also enhance the durability and storage stability of the DC-VC *** formation of VC van der Waals between DC and VC is demonstrated to be an effective strategy to protect the defect active sites from oxidation and hydroxylation degradation,thus significantly enhancing the electrochemical durability and storage anti-aging ***,the DC-VC van der Waals can reduce the reaction energy barrier to facilitate the *** findings are also confirmed by operando Fourier transform infrared spectroscopy and density functional theory *** is necessary to mention that the preparation of this DC-VC electrocatalyst can be scaled up,and the ORR performance of the largely produced electrocatalyst is demonstrated to be very ***,the DC-VC-based aluminum-air batteries display very competitive power density with good performance maintenance.

关键词： Van der Waals heterostructure Oxygen reduction reaction Stability Scalable production Aluminum-air battery

In-situ transformed Mott-Schottky heterointerface in silver/manganese oxide nanorods boosting oxygen reduction,oxygen evolution,and hydrogen evolution reactions

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Nano Research 2024年第5期17卷 3622-3632页

作者： Ruiqi Cheng Kaiqi li huanxin li Fengzhan Sun Xiaoqian He Tianshuo Zhao Jiao Zhang Chaopeng Fu Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Christopher Ingold Laboratory Department of ChemistryUniversity College LondonLondon WC1H 0AJUK Department of Chemistry Physical&Theoretical Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxford OX13QZUK Center of Hydrogen Science School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The development of non-platinum group metal(non-PGM)and efficient multifunctional electrocatalysts for oxygen reduction reaction(ORR),oxygen evolution reaction(OER),and hydrogen evolution reaction(HER)with high activity and stability remains a great ***,by in-situ transforming silver manganese composite oxide heterointerface into boosted Mott-Schottky heterointerface through a facile carbon reduction strategy,a nanorod-like silver/manganese oxide with superior multifunctional catalytic activities for ORR,OER and HER and stability was *** nanorod-like silver/manganese oxide with Mott-Schottky heterointerface(designated as Ag/Mn_(3)O_(4))exhibits an ORR half-wave potential of 0.831 V(***)in 0.1 M KOH,an OER overpotential of 338 mV and a HER overpotential of 177 mV at the current density of 10 mA·cm^(-2)in 1 M KOH,contributing to its noble-metal benchmarks comparable performance in aqueous aluminum-air(Al-air)battery and laboratorial overall water splitting electrolytic ***,in-situ electrochemical Raman and synchrotron radiation spectroscopic measurements were conducted to further illustrate the catalytic mechanism of Ag/Mn_(3)O_(4)Mott-Schottky heterointerface towards various electrocatalytic *** the heterointerface,the Ag phase serves as the electron donor and the active phase for ORR and HER,while the Mn_(3)O_(4)phase serves as the electron acceptor and the active phase for OER,*** work deepens the understanding of the Mott-Schottky effect on electrocatalysis and fills in the gap in fundamental physical principles that are behind measured electrocatalytic activity,which offers substantial implications for the rational design of cost-effective multifunctional electrocatalysts with Mott-Schottky effect.

关键词： heterointerface electron donor-acceptor pair electrocatalyst Al-air battery water splitting

Towards Practical Application of li-S Battery with High Sulfur Loading and Lean Electrolyte:Will Carbon-Based Hosts Win This Race?

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Nano-Micro Letters 2023年第9期15卷 384-422页

作者： Yi Gong Jing li Kai Yang Shaoyin li Ming Xu Guangpeng Zhang Yan Shi Qiong Cai huanxin li Yunlong Zhao Advanced Technology Institute University of SurreyGuildfordSurrey GU27XHUK Department of Chemical and Process Engineering University of SurreyGuildford GU27XHUK Department of Chemistry Physical and Theoretical Chemistry LaboratoryUniversity of OxfordOxford OX13QZUK Department of Engineering University of Cambridge9 JJ Thomson AvenueCambridge CB30FAUK State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082HunanPeople’s Republic of China College of Materials and Metallurgy Guizhou UniversityGuiyang 550025People’s Republic of China

As the need for high-energy–density batteries continues to grow, lithium-sulfur(li–S) batteries have become a highly promising next-generation energy solution due to their low cost and exceptional energy density compared to commercially available li-ion batteries. Research into carbon-based sulfur hosts for li–S batteries has been ongoing for over two decades, leading to a significant number of publications and ***, the commercialization of li–S batteries has yet to be realized. This can be attributed, in part, to the instability of the li metal anode. However, even when considering just the cathode side, there is still no consensus on whether carbon-based hosts will prove to be the best sulfur hosts for the industrialization of li–S batteries. Recently, there has been controversy surrounding the use of carbon-based materials as the ideal sulfur hosts for practical applications of li–S batteries under high sulfur loading and lean electrolyte conditions. To address this question, it is important to review the results of research into carbon-based hosts, assess their strengths and weaknesses, and provide a clear perspective. This review systematically evaluates the merits and mechanisms of various strategies for developing carbon-based host materials for high sulfur loading and lean electrolyte conditions. The review covers structural design and functional optimization strategies in detail, providing a comprehensive understanding of the development of sulfur hosts. The review also describes the use of efficient machine learning methods for investigating li–S batteries. Finally, the outlook section lists and discusses current trends, challenges, and uncertainties surrounding carbon-based hosts, and concludes by presenting our standpoint and perspective on the subject.

关键词： li-S batteries Carbon materials Structural design Functional modification Machine learning

3D hierarchical microspheres constructed by ultrathin MoS2-C nanosheets as high-performance anode material for sodium-ion batteries

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Journal of Energy Chemistry 2020年第10期29卷 307-315页

作者： Wenlong Zhang Haihui Zhou Zhongyuan Huang Songlin li Chuqing Wang huanxin li Zhanheng Yan Teng Hou Yafei Kuang State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082HunanChina State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083HunanChina

MoS2/C composites are considered to have great application potential in sodium-ion batteries(SIBs).It is a challenging and meaningful subject that developing high-performance anode materials via combining MoS2 and carbon effectively to give free rein to their advantages in sodium ion *** this work,a novel MoS2-C material was designed by using cellulose nanocrystals(CNCs)as low-cost and green carbon source.3 D hierarchical microspheres(200-250 nm)constructed by ultrathin MoS2-C nanosheets were synthesized by synchronizing the pre-carbonization of CNCs with the formation of MoS2 in hydrothermal reaction and subsequent pyrolysis *** is found that the ultrathin MoS2-C nanosheets were composed of CNCs-derived short-range ordered carbon and few-layered *** from the unique structure and robust combination of MoS2 and CNCs-derived carbon,the ultrathin MoS2-C nanosheets composite was proved to have excellent cycling stability and superior rate performance in sodium-ion half-cell test and have high first reversible specific capacity of 397.9 m Ah/g in full-cell *** work provides a significant and effective pathway to prepare MoS2-C materials with excellent electrochemical performance for the application in large-scale energy storage systems.

关键词： Cellulose nanocrystals MoS2-C nanosheets Hierarchical microspheres Anode material Sodium-ion batteries

The Contribution of Opal-Associated Phosphorus to Bioavailable Phosphorus in Surface and Core Sediments in the East China Sea

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Journal of Ocean University of China 2018年第3期17卷 571-580页

作者： li huanxin HE Huijun YANG Shifeng liU Yanli CHE Hong li Mujian ZHANG Jing Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Earth and Environmental System Graduate School of Science and Engineering University of Toyama

To improve the burial flux calculations of bioavailable phosphorus （P） and study opal-associated P （Opal-P） in the East China Sea （ECS）, surface and core sediments were collected in the Changjiang Estuary （CE） and the south of the Cheju Island. In this study, sedimentary P was operationally divided into seven different forms using modified sedimentary extraction （SEDEX） technique： LSor-P （exchangeable or loosely sorbed P）, Fe-P （easily reducible or reactive ferric Fe-bound P）, CFA-P （authigenic carbonate fluorapatite and biogenic apatite and CaCO3-bound P）, Detr-P （detrital apatite）, Org-P （organic P）, Opal-P and Ref-P （refractory P）. The data revealed that the concentrations of the seven different P forms rank as Detr-P 〉 CFA-P 〉 Org-P 〉 Ref-P 〉 Opal-P 〉 Fe-P 〉 LSor-P in surface sediments and CFA-P 〉 Detr-P 〉 Org-P 〉 Ref-P 〉 Fe-P 〉 Opal-P 〉 LSor-P in core sediments. The distributions of the total phosphorus （TP）, TIP, CFA-P, Detr-P are similar and decrease from the CE to the south of the Cheju Island. Meanwhile, Org-P and Opal-P exhibit different distribution trends; this may be affected by the grain size and TOM. The concentrations of potentially bioavailable P are 9.6-13.0 μmol g^-1 and 10.0-13.6 μmol g^-1, representing 61%-70% and 41%？64% of the TP in surface and core sediments, respectively. The concentrations of Opal-P are 0.6-2.3 μmol g^-1 and 0.6-1.4 μmol g^-1 in surface and core sediments, ac-counting for 5.3%？19.8% and 4.2%？10.6% of bioavailable P, respectively. The total burial fluxes of Opal-P and bioavailable P are 1.4×10^9 mol y^-1 and 1.1×10^10 mol yr^-1 in the ECS, respectively. Opal-P represents about 12.7% of potentially bioavailable P, which should be recognized when studying P cycling in marine ecosystems.

关键词： phosphorus speciation opal-associated P burial flux sediments East China Sea

Fe-Co-Ni ternary single-atom electrocatalyst and stable quasi-solidelectrolyte enabling high-efficiency zinc-air batteries

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Nano Research Energy 2024年第3期3卷 61-72页

作者： Shifeng Qin Kaiqi li Mengxue Cao Wuhua liu Zhongyuan Huang Guanjie He Ivan P.Parkin huanxin li College of Chemistry and Chemical Engineering Hunan UniversityChangsha410082China Department of Chemistry University College LondonLondonWC1H 0AJUK Guizhou Dalong Huicheng New Material Co. LtdTongren 554001China Electrochemical Innovation Lab Department of Chemical EngineeringUniversity College LondonLondonWC1E 7JEUK Department of Chemistry Physical&Theoretical Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxfordOX13QZUK

The non-noble metal(Fe,Co,Ni,etc.)catalysts possess promising potential to replace noble metals(e.g.,Pt,Ru,Ir,etc.)as catalysts for oxygen *** to now,various mono-and dual-single-atom catalysts have been fabricated,though it is still challenging to synthesise ternary single-atom catalysts due to the difference of interaction forces between different metal ions(Fe,Co,Ni,etc.)and ***,we report a Fe-Co-Ni ternary single-atom catalyst(FeCoNi-Nx)derived from a zeolitic imidazolate frameworks(ZIF)precursor as an efficient oxygen electrocatalyst,and an optimised flexible casting-drying polyvinyl alcohol(CD-PVA)film as a quasi-solid electrolyte host,for high-efficiency solid-state Zn-air *** aberration-corrected HAADF-STEM and EELS spectrum confirm the co-existence of Fe,Co and Ni single atoms in the FeCoNi-Nx catalyst,and the electrochemical,mechanical,and durability tests prove the superiority of the CD-PVA *** a result,the FeCoNi-Nx-based rechargeable Zn-air battery delivers superior specific capacity(846.8 mAh·gZn-1)and power density(135 mW·cm^(-2))in aqueous electrolyte,as well as an over 60 mW·cm^(-2)power density in quasi-solid *** a result,the quasi-solid-state Zn-air battery with a small area of only 2 cm2 is able to charge a mobile phone,which outperforms all the reported devices to date.

关键词： Fe-Co-Ni ternary single atoms electrocatalyst CD-PVA film solid-state Zn-air battery long-term durability

Toward batch synthesis of high-quality graphene by cold-wall chemical vapor deposition approach

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Nano Research 2022年第11期15卷 9683-9688页

作者： Kaicheng Jia Ziteng Ma Wendong Wang Yongliang Wen huanxin li Yeshu Zhu Jiawei Yang Yuqing Song Jiaxin Shao Xiaoting liu Qi Lu Yixuan Zhao Jianbo Yin Luzhao Sun Hailin Peng Jincan Zhang li lin Zhongfan liu Center for Nanochemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular ScienceCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing Graphene Institute Beijing 100095China School of Physics and Astronomy University of ManchesterManchester M139PLUK State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China Department of Engineering University of CambridgeCambridge CB30FAUK Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China Key Laboratory of Opto-Electronics Technology Ministry of EducationCollege of Electronic Science and TechnologyFaculty of Information TechnologyBeijing University of TechnologyBeijing 100024China State Key Laboratory of Heavy Oil Processing College of ScienceChina University of PetroleumBeijing 102249China School of Materials Science and Engineering Peking UniversityBeijing 100871China

Chemical vapor deposition(CVD)has emerged as a promising approach for the controlled growth of graphene films with appealing scalability,controllability,and ***,the synthesis of high-quality graphene films still suffers from low production capacity and high energy consumption in the conventional hot-wall CVD *** contrast,owing to the different heating mode,cold-wall CVD(CW-CVD)system exhibits promising potential for the industrial-scale production,but the quality of as-received graphene remains inferior with limited domain size and high defect ***,we demonstrated an efficient method for the batch synthesis of high-quality graphene films with millimeter-sized domains based on CW-CVD *** reduced defect density and improved properties,the as-received graphene was proven to be promising candidate material for electronics and anti-corrosion *** study provides a new insight into the quality improvement of graphene derived from CW-CVD system,and paves a new avenue for the industrial production of high-quality graphene films for potential commercial applications.

关键词： graphene cold-wall chemical vapor deposition(CVD) defects electrical performance

Boric Acid-Assisted Pyrolysis for High-Loading Single-Atom Catalysts to Boost Oxygen Reduction Reaction in Zn-Air Batteries

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Energy & Environmental Materials 2024年第2期7卷 102-110页

作者： Chenxi Xu Jiexing Wu liang Chen Yi Gong Boyang Mao Jincan Zhang Jinhai Deng Mingxuan Mao Yan Shi Zhaohui Hou Mengxue Cao huanxin li Haihui Zhou Zhongyuan Huang Yafei Kuang State Key Laboratory for Chemo/Biosensing and Chemometrics and College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410082China School of Chemistry and Chemical Engineering Key Laboratory of Hunan Province for Advanced Carbon-based Functional MaterialsHunan Institute of Science and TechnologyYueyang 414006China Advanced Technology Institute University of SurreyGuildford Surrey GU27XHUK Department of Engineering University of Cambridge9 JJ Thomson AvenueCambridge CB30FAUK King's College London London SE11ULUK Department of Electrical and Electronic Engineering Imperial College LondonLondon SW72AZUK College of Materials and Metallurgy Guizhou UniversityGuiyang 550025China Department of Chemistry Physical&Theoretical Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxford OX13QZUK

The emerging of single-atom catalysts(SACs)offers a great opportunity for the development of advanced energy storage and conversion devices due to their excellent activity and durability,but the actual mass production of high-loading SACs is still ***,a facile and green boron acid(H_(3)BO_(3))-assisted pyrolysis strategy is put forward to synthesize SACs by only using chitosan,cobalt salt and H_(3)BO_(3)as precursor,and the effect of H_(3)BO_(3)is deeply *** results show that molten boron oxide derived from H_(3)BO_(3)as ideal high-temperature carbonization media and blocking media play important role in the synthesis *** a result,the acquired Co/N/B tri-doped porous carbon framework(Co-N-B-C)not only presents hierarchical porous structure,large specific surface area and abundant carbon edges but also possesses high-loading single Co atom(4.2 wt.%),thus giving rise to outstanding oxygen catalytic *** employed as a catalyst for air cathode in Zn-air batteries,the resultant Co-N-B-C catalyst shows remarkable power density and long-term ***,our work gains deep insight into the role of H_(3)BO_(3)and provides a new avenue to synthesis of high-performance SACs.

关键词： boric acid oxygen reduction reaction single-atom catalysts Zn-air batteries

Active Fault Tolerant Control of CSTR System Based on MLD Model

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Active Fault Tolerant Control of CSTR System Based on MLD Mo...