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Doping engineering on carbons as electrocatalysts for oxygen reduction reaction

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Fundamental Research 2021年第6期1卷 807-823页

作者： Ruopeng Zhao Ying Chen Shaoming Huang Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Institute for Frontier Materials Deakin University75 Pigdons RoadWaurn PondsVictoria 3216Australia

Oxygen reduction reaction(ORR)is the key reaction for the development of clean and sustainable fuel cells.How-ever,the ORR reaction is sluggish kinetics,thereby it remains a grand challenge to develop high-activity,low-cost,and long-durability electrocatalysts to facilitate the ORR process for practical application.The introduction of dopants into/on the carbon skeleton is known as an efficient route to obtain a novel metal-free electrocatalyst for ORR.Tremendous studies have been performed on the synthesis,structural characterization,catalytic perfor-mance and mechanism of the doped carbons as electrocatalysts for ORR in the last decade.In this review,progress in doping engineering on carbons including the types of doping(heteroatom doping,charge-transfer doping,and defective doping)and configurations of heteroatom-doped carbons with corresponding catalytic mechanism will be mainly focused.And the challenges and perspectives on the future development of metal-free doped carbons as electrocatalysts for ORR are given.

关键词： Doping Carbons Electrocatalysts Oxygen reduction reaction

Efficient Polytelluride Anchoring for Ultralong-Life Potassium Storage: Combined Physical Barrier and Chemisorption in Nanogrid-in-Nanofiber

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Nano-Micro Letters 2024年第4期16卷 364-378页

作者： Qinghua Li Dandan Yu Jian Peng Wei Zhang Jianlian huang Zhixin Liang Junling Wang Zeyu Lin Shiyun Xiong Jiazhao Wang Shaoming Huang Guangzhou Key Laboratory of Low‑Dimensional Materials and Energy Storage Devices School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006People’s Republic of China College of Materials and Chemistry China Jiliang UniversityHangzhou 310018People’s Republic of China Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth WollongongNSW 2522Australia

Metal tellurides(MTes) are highly attractive as promising anodes for high-performance potassium-ion batteries. The capacity attenuation of most reported MTe anodes is attributed to their poor electrical conductivity and large volume variation. The evolution mechanisms, dissolution properties, and corresponding manipulation strategies of intermediates(K-polytellurides, K-pTe_(x)) are rarely mentioned. Herein,we propose a novel structural engineering strategy to confine ultrafine CoTe_(2) nanodots in hierarchical nanogrid-in-nanofiber carbon substrates(CoTe_(2)@NC@NSPCNFs) for smooth immobilization of K-pTe_(x) and highly reversible conversion of CoTe_(2) by manipulating the intense electrochemical reaction process. Various in situ/ex situ techniques and density functional theory calculations have been performed to clarify the formation, transformation, and dissolution of K-pTe_(x)(K_(5)Te_(3) and K_(2)Te), as well as verifying the robust physical barrier and the strong chemisorption of K_(5)Te_(3) and K_(2)Te on S, N co-doped dual-type carbon substrates. Additionally, the hierarchical nanogrid-in-nanofiber nanostructure increases the chemical anchoring sites for K-pTe_(x), provides sufficient volume buffer space, and constructs highly interconnected conductive microcircuits, further propelling the battery reaction to new heights(3500 cycles at 2.0 A g^(-1)). Furthermore, the full cells further demonstrate the potential for practical applications. This work provides new insights into manipulating K-pTe_(x) in the design of ultralong-cycling MTe anodes for advanced PIBs.

关键词： Polytelluride dissolution Nanogrid-in-nanofiber structure Physicochemical adsorption Reaction mechanism Ultralonglife potassium storage

Controlling the Diameter of Single-Walled Carbon Nanotubes by Improving the Dispersion of the Uniform Catalyst Nanoparticles on Substrate

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Nano-Micro Letters 2015年第4期7卷 353-359页

作者： Junjun Chen Xiangju Xu Lijie Zhang Shaoming Huang Nanomaterials and Chemistry Key Laboratory Wenzhou University

To have uniform nanoparticles individually dispersed on substrate before single-walled carbon nanotubes(SWNTs)growth at high temperature is the key for controlling the diameter of the SWNTs.In this letter,a facile approach to control the diameter and distribution of the SWNTs by improving the dispersion of the uniform Fe/Mo nanoparticles on silicon wafers with silica layer chemically modified by 1,1,1,3,3,3-hexamethyldisilazane under different conditions is reported.It is found that the dispersion of the catalyst nanoparticles on Si wafer surface can be improved greatly from hydrophilic to hydrophobic,and the diameter and distribution of the SWNTs depend strongly on the dispersion of the catalyst on the substrate surface.Well dispersion of the catalyst results in relatively smaller diameter and narrower distribution of the SWNTs due to the decrease of aggregation and enhancement of dispersion of the catalyst nanoparticles before growth.It is also found that the diameter of the superlong aligned SWNTs is smaller with more narrow distribution than that of random nanotubes.

关键词： Single-walled carbon nanotube Diameter control Chemical modification Chemical vapor deposition Catalyst nanoparticles

Bimetallic AgNi nanoparticles anchored onto MOF-derived nitrogen-doped carbon nanostrips for efficient hydrogen evolution

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Green Energy & Environment 2023年第1期8卷 258-266页

作者： Dandan Chen Cheng Han Qiuhong Sun Junyang Ding Qi huang Ting-Ting Li Yue Hu Jinjie Qian Shaoming Huang Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhouChina State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouChina School of Materials Science and Chemical Engineering Ningbo UniversityNingboChina School of Materials and Energy Guangdong University of TechnologyGuangzhouChina

Hydrogen energy has long been recognized as a clean alternative to conventional fossil fuels,which can be applied in a wide range of transportation and power generation applications.The rational design and engineering of high-performance and robust catalysts for hydrogen evolution reaction(HER)shows not a great significance but a challenge for efficient electrochemical water splitting.Herein,a new type of Nibased Ni-ABDC precursor has been obtained,which leads to the formation of N-doped porous carbon nanomaterials uniformly coated with wellproportioned bimetallic AgNi alloys via a stepwise strategy.To their credit,all samples of AgNi/NC-X are structurally calcined from the pristine AgNi-ABDC-X by tuning the different concentration of AgNO3,which means all of them maintain the vermicelli-like morphology compared with Ni-ABDC.The series of AgNi/NC-X materials can be regarded as effective electrocatalysts for HER both in acidic and alkaline media,but an acid-leaching phenomenon is observed.Among them,the as-prepared AgNi/NC-2 exhibits a low overpotential of 103 mV at the current density of 10 mA cm^(-2)and decent durability with a high retention rate of 90.9%after 10 h in 1.0 mol L^(-1)KOH electrolyte.The compelling HER properties of AgNi/NC-2 can be attributed to the synergistic effect between the hierarchical carbon materials,partial N-doping and abundant AgNi alloys.Meanwhile,this study provides a practicable method for the development of efficient HER electrocatalysts for energy applications,which can be conveniently prepared through the reasonable introduction of active components in the crystalline inorganic-organic precursors.©2021 Institute of Process Engineering,Chinese Academy of Sciences.Publishing services by Elsevier B.V.on behalf of KeAi Communications Co.,Ltd.This is an open access article under the CC BY-NC-ND license(http://***/licenses/by-nc-nd/4.0/).

关键词： Metal-organic framework Carbon nanomaterial AgNi alloy Hydrogen evolution Electrocatalysis

Recent advances and perspective on the synthesis and photocatalytic application of metal halide perovskite nanocrystals

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Nano Research 2021年第11期14卷 3773-3794页

作者： Yong Xu Muhan Cao Shaoming Huang Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou510006China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou215123China

Metal halide perovskite nanocrystals have attracted great attention of researchers due to their unique optoelectronic properties such as high photoluminescence quantum yield (PLQY), narrow full width at half-maximum (FWHM), long exciton diffusion length and high carrier mobility, which have been widely used in diverse fields including solar cells, photodetectors, light-emitting diodes, and lasers. Very recently, metal halide perovskites have emerged as a new class of materials in photocatalysis due to their promising photocatalytic performance. In this review, we summarize the recent advances on synthesis, modification and functionalization, with a specific focus on the photocatalytic application of metal halide perovskite nanocrystals. Finally, a brief outlook is proposed to point out the challenges in this emerging area. The goal of this view is to introduce the photocatalytic application of the metal halide perovskites and motivate researchers from different fields to explore more potentials in catalysis.

关键词： metal halide perovskite nanocrystals synthesis modification functionalization photocatalytic application

N-doped carbon nanocube with zinc oxide sodiophilic sites enables a superior sodium metal anode

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Nano Research 2023年第1期16卷 411-419页

作者： Yijuan Li Pan Xu Hongbin Ni Jirong Mou Tangchao Xie Hong Xiao Hengji Zhu Quanfeng Dong Shaoming Huang Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China State Key Laboratory for Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Engineering Research Centre of Electrochemical Technologies of Ministry of EducationXiamen UniversityXiamen 361005China School of Environment and Energy South China University of TechnologyGuangzhou 510006China

The metallic Na has been regarded as the most promising anode for next-generation sodium metal batteries(SMBs)owing to its high theoretical specific capacity,low redox potential,and low cost.The practical applications of Na metal,however,have still been severely hindered by the uncontrolled sodium dendrites growth during Na deposition and stripping processes,which leads to low Coulombic efficiency and poor cycling stability.In this study,sub-nano zinc oxide(ZnO)uniformly dispersed in threedimensional(3D)porous nitrogen-doped(N-doped)carbon nanocube(ZnO@NC)was acquired as a stable host for dendrite-free Na metal anode.Benefiting from the in-situ electrochemically formed sodiophilic nucleation site(NaZn13 alloy)and the enriched pore structure,rapid and uniform sodium deposition behavior can be performed.As expected,the ZnO@NC electrode delivers impressive electrochemical performance,an ultra-high areal capacity of 20 mAh·cm−2 in the half-cell can be maintained for 2,000 h.In the symmetrical-cell,it can also exhibit up to 3,000 h at 3 mA·cm−2 and 3 mAh·cm−2 with low polarization potential.Furthermore,in the full-cell that matches with Prussian blue(PB)cathode,the Na@ZnO@NC anode performs the outstanding long-cycling and rate performance.Therefore,this work provides an effective strategy to inhibit the growth of Na dendrites for the development of high-safety and long-cycling SMBs.

关键词： sub-nano zinc oxide N-doped carbon nanocube sodiophilic site NaZn13 alloy dendrite-free Na metal anode

Growth and Formation Mechanism of Branched Carbon Nanotubes by Pyrolysis of Iron(Ⅱ) Phthalocyanine

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Nano-Micro Letters 2013年第2期5卷 124-128页

作者： Qiong Wei Yunyun Liu Lijie Zhang Shaoming Huang Nanomaterials and Chemistry Key Laboratory College of Chemistry and Materials Engineering Wenzhou University

In this letter, a route for synthesizing vertically aligned multi-walled carbon nanotubes（MWCNTs） with branched nanotubes in large area was reported. The branched MWCNTs up to about 30% can be generated by the pyrolysis of iron（Ⅱ） phthalocyanine in presence of thiol under Ar/H2 at 800900℃. The growth mechanism of the branched nanotubes was proposed and the possible reason that thiol enhanced branched nanotubes growth is discussed. The as-prepared samples provide a suitable candidate to investigate the special electrical or thermal properties of CNTs with branched structures further.

关键词： Carbon nanotube Chemical vapour deposition Branched Growth mechanism

Multidimensional CdS nanowire/CdIn2S4 nanosheet heterostructure for photocatalytic and photoelectrochemical applications

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Nano Research 2017年第8期10卷 2699-2711页

作者： Ting Wang Yuanyuan Chai Dekun Ma Wei Chen Weiwei Zheng Shaoming Huang Zhejiang Key Laboratory of Carbon Materials Wenzhou University Wenzhou 325027 China Department of Chemistry Syracuse University Syracuse New York 13244 USA School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China

Nanomaterial shapes can have profound effects on material properties, and therefore offer an efficient way to improve the performances of designed materials and devices. The rational fabrication of multidimensional architectures such as one dimensional （1D）-two dimensional （2D） hybrid nanomaterials can integrate the merits of individual components and provide enhanced functionality. However, it is still very challenging to fabricate 1D/2D architectures because of the different growth mechanisms of the nanostructures. Here, we present a new solvent- mediated, surface reaction-driven growth route for synthesis of CdS nanowire （NW）/CdIn2S4 nanosheet （NS） 1D/2D architectures. The as-obtained CdS NW/ CdIn2S4 NS structures exhibit much higher visible-light-responsive photocatalytic activities for water splitting than the individual components. The CdS NW/CdIn2S4 NS heterostructure was further fabricated into photoelectrodes, which achieved a considerable photocurrent density of 2.85 mA·cm^-2 at 0 V vs. the reversible hydrogen electrode （RHE） without use of any co-catalysts. This represents one of the best results from a CdS-based photoelectrochemical （PEC） cell. Both the multidimensional nature and type II band alignment of the 1D/2D CdS/CdIn2S4 heterostructure contribute to the enhanced photocatalyfic and photoelectrochemical activity. The present work not only provides a new strategy for designing multidimensional 1D/2D heterostructures, but also documents the development of highly efficient energy conversion catalysts.

关键词： CdS nanowires CdIn22S4 nanosheets one-dimensional （1D）/ two-dimensional （2D） heterostructures photocatalytic water splitting photoelectrochemical （PEC） cell

Pomegranate-inspired porous SnSe/ZnSe@C anode:A stress-buffer nanostructure for fast and ultrastable sodium-ion storage

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Journal of Energy Chemistry 2022年第12期75卷 369-377,I0010页

作者： Zhixin Liang Qinghua Li Wang Zhang Dandan Yu Wei Zhang Jiawei Wu Gaoyu Wang Wenbo Fan Junling Wang Shaoming Huang School of Materials and Energy Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage DevicesGuangdong University of TechnologyGuangzhou 510006GuangdongChina College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055GuangdongChina College of Materials and Chemistry China Jiliang UniversityHangzhou 310018ZhejiangChina

Tin selenide(SnSe)is considered as a potential anode for sodium-ion batteries(SIBs)owing to its high theoretical specific capacity.Unfortunately,it suffers from drastic volume expansion/contraction during sodium ions insertion/extraction,resulting in poor cycling stability.Herein,a pomegranate-inspired porous carbon shell wrapped heterogeneous SnSe/ZnSe composite(SnSe/ZnSe@C)is exquisitely designed and fabricated through electrostatic spraying followed by high-temperature selenization.The polyacrylonitrile-derived carbon shell acts as an adhesive to link the porous cubic SnSe/ZnSe and form highly interconnected microcircuits to improve the electron/ion transfer efficiency and inhibit the bulk volume change of internal metallic selenide nanoparticles and polyselenides dissolution during repeated cycling.Moreover,the abundant heterostructure interface of SnSe/ZnSe further significantly accelerates the electrons/ions transport.As a result,the as-prepared SnSe/ZnSe@C electrode exhibits a high specific capacity(508.3 m Ah g^(-1)at 0.05 A g^(-1)),excellent rate performance(177.8 m Ah g^(-1)at 10.0 A g^(-1)),and remarkable cycling stability(195.9 m Ah g^(-1)after 10,000 cycles at 5.0 A g^(-1)).Furthermore,in-situ Xray diffraction(XRD)/Raman,ex-situ transmission electron microscopy,and kinetic analysis clearly reveal a four-step electrochemical reaction process and battery-capacitor dual-mode sodium storage mechanism.This work provides a new perspective for developing commercial SIBs anode materials with high capacity and long lifespan.

关键词： SnSe Electrostatic spraying Carbon armor Superior cycling stability Sodium-ion batteries Sodiation mechanism