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基于nicoO/NF阳极的电解水制氢同步污水处理可行性研究

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工业水处理 2024年

作者：侯炜张潇赵博玮太原理工大学环境科学与工程学院

电解水制氢技术具有清洁和可再生等优点，但由于能源消耗高、成本昂贵和制氢效率低而限制了其应用，因此，研究制备了以泡沫镍为基底的nico2O4/NF，并以此作为阳极，通过匹配商业化铂片析氢催化剂构建了电化学方法处理污水耦合电解水制... 详细信息

电解水制氢技术具有清洁和可再生等优点，但由于能源消耗高、成本昂贵和制氢效率低而限制了其应用，因此，研究制备了以泡沫镍为基底的nico2O4/NF，并以此作为阳极，通过匹配商业化铂片析氢催化剂构建了电化学方法处理污水耦合电解水制氢体系，评估了nico2O4/NF阳极材料的电化学性能，考察了体系的污水处理能力及运行情况。结果表明，采用一步水热法合成的nico2O4/NF具有低过电位及较好的稳定性；对体系施加3 V电压下处理96 h，COD和氨氮的去除率分别达到44.1%和18%，并且降解COD和氨氮一级反应动力学具有较高的相关性，在给定条件下具有相对较低的反应速率常数。该nico2O4/NF电催化剂及其构建的电解水制氢同步污水处理体系实现了对污水的处理和净化，同时实现了氢气的生产利用，达到了资源综合利用和环境保护的双重目的。

关键词：电解水制氢电催化 nico O /NF 市政污水

同步辐射吸收光谱技术在nicoO电极材料储能机理研究中的应用

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中国材料进展 2024年

作者：齐颖胡小雨万初斌北京科技大学数理学院浙江大学材料科学与工程学院北京市实验室服务保障中心

同步辐射吸收谱(X-ray absorption fine structure，简称XAFS)是一种基于同步辐射光源的强大分析技术，用于研究材料局域原子或电子结构，XAFS技术广泛应用于物理学、材料学、化学、环境学等领域。本文整理近些年同步辐射吸收光谱技术... 详细信息

同步辐射吸收谱(X-ray absorption fine structure，简称XAFS)是一种基于同步辐射光源的强大分析技术，用于研究材料局域原子或电子结构，XAFS技术广泛应用于物理学、材料学、化学、环境学等领域。本文整理近些年同步辐射吸收光谱技术在超级电容器nico2O4电极材料研究方面的应用，主要内容包括：(1)XANES在确定元素价态、电荷转移上的应用；(2)EXAFS在确定原子配位结构上的应用；(3)原位XAFS在确定电化学反应机理上的应用。希望帮助科研人员从微观结构角度对该材料电化学储能机理有更深入的理解，促进nico2O4电极材料和超级电容器的发展。

关键词：电极材料 nico O 同步辐射微观结构 XAFS

球状nicoS的制备及其在KOH溶液中的电化学行为

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复合材料学报 2024年

作者：龙升刘依邹攀杨泛明贺国文湖南城市学院材料与化学工程学院低碳与环境功能材料湖南省普通高校重点实验室

nico2S4中Ni和Co元素可以同时参与充放电过程，获得较高的放电比容量和能量密度。对nico2S4中双电层电容和赝电容的贡献率进行分析，有助于推动电极材料的深入开发。以乙酸钴为Co源、乙酸镍为Ni源、硫代乙酰胺为沉淀剂，通过水热合成法... 详细信息

nico2S4中Ni和Co元素可以同时参与充放电过程，获得较高的放电比容量和能量密度。对nico2S4中双电层电容和赝电容的贡献率进行分析，有助于推动电极材料的深入开发。以乙酸钴为Co源、乙酸镍为Ni源、硫代乙酰胺为沉淀剂，通过水热合成法制备具有优异电化学性能的球状电极材料硫钴酸镍(nico2S4)。利用X射线衍射、X射线光电子能谱、扫描电子显微镜、透射电子显微镜、Mapping和N2吸附-脱附技术对nico2S4的物相、形貌、组成和孔结构进行分析，并对其在KOH电解液中的充放电行为进行探究。结果表明，球状nico2S4制备成功，并且Ni、Co和S的比例为1 : 2.1 : 4.2。nico2S4为立方相多晶体，晶格常数为0.9387 nm。Ni和Co分别以Ni2+/Ni3+和Co2+/Co3+的形式存在于nico2S4的晶格之中。nico2S4的孔体积为0.402 cm3/g，并且介孔比例为90.6%。nico2S4在KOH溶液中同时产生双电层电容和赝电容，两者所占比例分别为60.6%、39.4%。电流密度为0.2 A/g时，放电比容量为409.7 F/g，能量密度为14.2 W·h/kg。循环10000次，容量保持率为90.3%。

关键词： nico S KOH 球状电容器充放电双电层赝电容

颗粒状nicoO的制备及其在不同电解液中的电化学性能

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环境化学 2024年

作者：杨泛明易志成冯蓉湖南城市学院材料与化学工程学院

本文以NiCl2为镍源、CoCl2为钴源，通过静态水热处理合成nico2O4，并对其在6 mol·L-1KOH、0.5 mol·L-1K4Fe(CN)6溶液中的赝电容行为进行探究.采用X-射线衍射、X-射线光电子能谱、扫描电子显微镜、透射电子显微镜、能量色散谱和N2吸附... 详细信息

本文以NiCl2为镍源、CoCl2为钴源，通过静态水热处理合成nico2O4，并对其在6 mol·L-1KOH、0.5 mol·L-1K4Fe(CN)6溶液中的赝电容行为进行探究.采用X-射线衍射、X-射线光电子能谱、扫描电子显微镜、透射电子显微镜、能量色散谱和N2吸附-脱附技术对nico2O4的物相、组成、形貌和孔结构进行分析.结果表明，nico2O4为立方相多晶材料，并且Ni2+/Ni3+、Co2+/Co3+同时存在于晶格之中.nico2O4为颗粒状多孔材料，平均孔径为4.3 nm，孔体积为0.137 cm3·g-1.与K4Fe(CN)6相比较，nico2O4在KOH溶液中具有更好的倍率充放电性能.扫描速度由5 mV·s-1增大至50 mV·s-1时，nico2O4在KOH和K4Fe(CN)6溶液中的伏安放电比容量保持率分别为23.7%、17.0%.电流密度由0.5 A·g-1增大至8 A·g-1时，nico2O4在KOH的放电比容量保持率为31.9%，是其在K4Fe(CN)6溶液中的4.3倍.

关键词： nico O KOH K Fe(CN) 赝电容

Engineering the grain boundary:a promising strategy to configure nicoP_(4)O_(12)/nicoP nanowire arrays for ultra-stable supercapacitor

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Frontiers of Chemical Science and Engineering 2022年第8期16卷 1259-1267页

作者： Mengqi Cui Zining Wang Yuanye Jiang Hui Wang State Key Laboratory Base for Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China Guangdong Provincial Key Laboratory for Electronic Functional Materials and Devices Huizhou UniversityHuizhou 516001China

nicoP_(4)O_(12)/nicoP nanorod-like arrays with tunable grain boundary density and pores were synthesized by the processes composed of hydrothermal and pyrolysis,in which,the electron structure of Ni and Co atoms characterized by X-ray photoelectron spectroscopy was contemporaneous inverse manipulated.The optimized nicoP_(4)O_(12)/nicoP arrays have a high specific capacitance of 507.8μAh∙cm^(–2)at 1 mA∙cm^(–2),and good rate ability of 64.7%retention at 30-folds increased current density.Importantly,an ultra-stable ability,88.5%of retention after 10000 cycles,was achieved in an asymmetric cell assembled of the nicoP_(4)O_(12)/nicoP arrays with activated carbon.In addition,the energy and power densities of an asymmetric cell were higher than those of other work,demonstrating as-prepared nicoP_(4)O_(12)/nicoP arrays are promising electrodes for supercapacitors.

关键词： nico array electrode grain boundary stability supercapacitor

Co_9S_8 nanowires@nico LDH nanosheets arrays on nickel foams towards efficient overall water splitting

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Science Bulletin 2019年第3期64卷 158-165页

作者： Jingan Yan Ligang Chen Xin Liang State Key Laboratory of Chemical Resource Engineering and Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical Technology

Water electrolysis is considered to be an effective way to fabricate hydrogen, and it is desirable to find the highly efficient, inexpensive and good durability bifunctional electrocatalysts for overall water splitting.In this paper, we synthesis a unique structured catalyst that was composed by Co_9S_8 nanowires and nickel cobalt layered double hydroxide(nico-LDH) nanosheets. The ultrathin nanosheets decorated on the Co_9S_8 nanoarrays offer large specific surface area, numerous active edge sites and excellent electrical conductivity for fast electron transfer. Benefiting from this heterogeneous structure, the catalyst presents excellent catalytic performance in alkaline media. It requires 168 mV to reach current density of 10 mA/cm^2 for HER and 278 m V to reach current density of 30 mA/cm^2 for OER. When used as electrode in a homemade two-electrode system, it only needs t a voltage of 1.63 V to achieve current densities of 10 mA/cm^2, which proves Co_9S_8@nico LDH/NF as a superior bifunctional catalyst for water splitting.

关键词： Co9S8 nanowire nico LDH Hydrogen evolution reaction Oxygen evolution reaction Water splitting

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Rational construction of nico2O4@Fe2O3 core-shell nanowire arrays for high-performance supercapacitors

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Progress in Natural Science:Materials International 2021年第1期31卷 19-24页

作者： Ke Zhang Ze Cen Fang Yang Kaibing Xu School of Mechanical and Automotive Engineering Shanghai University of Engineering Science Research Center for Analysis and Measurement Donghua University

Fe2O3electrode materials exhibit excellent electrochemical performance in electrochemical energy storage system. However, its poor electrical conductivity limits its future practical application. The binder-free Ni Co2O4@Fe2O3composites was reasonably designed and fabricated on carbon fiber paper with nico2O4nanowires as conductive scaffold in the present investigation. The three-dimensional nanostructure of the porous Fe2O3nanorods coated the Ni Co2 O4 nanowire arrays showed the fascinating electrochemical performance, including high specific capacitance of 262 m F/cm2 at a current density of 1 m A/cm2, and remarkable cycle stability with～74.2% capacitance retention after 4000 cycles. The excellent pseudocapacitance performance of nico2O4@Fe2O3composite materials is due to synergistic effect between nico2O4and Fe2O3. The results of the present work show that nico2O4@Fe2O3core-shell composite electrode is expected to exhibit excellent performance in the field of supercapacitors.

关键词： Core-shell nico 2 O 4 Fe 2 O 3 Supercapacitors Synergistic effect

Al掺杂nico;S;电极材料的制备及其电化学性能

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精细化工 2022年

作者：周佳刘杰程思远刘璐陈星邓正华谢昆重庆三峡学院三峡库区水环境演变与污染防治重庆高校市级重点实验室东南大学化学化工学院重庆市轻合金材料与加工工程技术研究中心

以导电碳布（CC）为基底，NiCl;·6H;O、CoCl;·6H;O为原料，Al(NO;);·9H;O为Al源，通过两步水热法成功在CC上生长Al掺杂的nico;S;复合材料(CC@Al-nico;S;)。采用SEM、XRD、TEM和XPS对其进行了表征，并对CC@nico;S;电极和CC@Al-nico;S;电极的电化学性能进行了测试。结果表明，CC@Al-nico;S;具有中空纳米管结构，该结构可以提供大量反应活性位点；Al主要以Al;的形式存在于CC@nico;S;中，可以提高CC@nico;S;的导电性。当电流密度为1 A/g时，CC@nico;S;电极和CC@Al-nico;S;电极的比电容分别为844.5 和1515.8 F/g；在电流密度为6 A/g下经过1.0×10;次循环后，CC@Al-nico;S;电极的比电容保持率高达87.8%，表明Al掺杂能够显著提高CC@nico;S;的比电容和循环稳定性。

关键词： nico S Al掺杂中空纳米管水热法超级电容器有机电化学

Hierarchical nico LDH-rGO/Ni Foam Composite as Electrode Material for High-Performance Supercapacitors

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Transactions of Tianjin University 2019年第3期25卷 266-275页

作者： Shirun Yang Zilan Zhang Jinghong Zhou Zhijun Sui Xinggui Zhou State Key Laboratory of Chemical Engineering East China University of Science and Technology

In this study, a bulk composite material symbolized as nico LDH-rGO/Ni F was developed by a solvothermal process for the first time. This material was fabricated through simultaneous growth of nickel-cobalt layered double hydroxide(nico LDH) and reduced graphene oxide(rGO) on nickel foam. This bulk composite can be used directly as a binder-free electrode for supercapacitors(SCs). The physicochemical properties of this composite were characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The electrochemical properties of the composite were measured by the cyclic voltammetry and galvanostatic charge-discharge. The results show that this composite had a hierarchical structure and exhibited a significantly enhanced specific capacitance of up to 3383 F/g at 1 A/g. The asymmetric SC using this composite as a positive electrode had a high energy density of 40.54 Wh/kg at the power density of 206.5 W/kg and good cycling stability. Owing to the synergies between the metal oxides and the rGO, the preparation method of in situ growth and its hierarchical structure, this bulk composite displayed excellent electrochemical performance and had a promising application as an efficient electrode for high-performance SCs.

关键词： nico LDH-rGO Hierarchical structure Supercapacitors In-situ growth

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