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electroanalysis 1

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Research progress in tribo-electrochemistry and tribo-electrochemical polishing

ZHAI Wenjie

《机械工程前沿（英文）》 2007年 第2卷 第4期   页码 463-467 doi: 10.1007/s11465-007-0080-0

摘要： In this paper, the status quo and recent progress in the research on tribo-electrochemistry in aqueous and non-aqueous media, respectively, are reviewed. Much more attention has been paid to the tribo-electrochemical mechanisms for the control of friction and wear. Based on a summary of the conventional polishing principles of hard and brittle materials, the tribo-electrochemical polishing method is proposed. The results of the preliminary test show that tribo-electrochemical polishing is promising to become a critical technology in the high efficient polishing and planarization of microelectronic materials.

关键词： tribo-electrochemical mechanisms     planarization     non-aqueous     tribo-electrochemistry     summary    

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Study on tribological and electrochemistry properties of metal materials in H2O2 solutions

Chengqing YUAN, Li YU, Jian LI, Xinping YAN

《机械工程前沿（英文）》 2012年 第7卷 第1期   页码 93-98 doi: 10.1007/s11465-012-0313-8

摘要：

Hydrogen peroxide (H2O2) is a kind of ideal green propellant. It is crucial to study the wear behavior and failure modes of the metal materials under the strong oxidizing environment of H2O2. This study aims to investigate the wear of rubbing pairs of 2Cr13 stainless steel against 1045 metal in H2O2 solutions, which has a great effect on wear, the decomposition and damage mechanism of materials. The comparison analysis of the friction coefficients, wear mass loss, worn surface topographies and current densities was conducted under different concentrations of H2O2 solutions. There were significant differences in the tribological and electrochemistry properties of the rubbing pairs in different H2O2 solutions.

关键词： hydrogen peroxide     wear     corrosion     wear mechanism    

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Enabling nickel ferrocyanide nanoparticles for high-performance ammonium ion storage

《化学科学与工程前沿（英文）》 2023年 第17卷 第2期   页码 226-235 doi: 10.1007/s11705-022-2198-3

摘要： Prussian blue and its analogs are extensively investigated as a cathode for ammonium-ion batteries. However, they often suffer from poor electronic conductivity. Here, we report a Ni2Fe(CN)6/multiwalled carbon nanotube composite electrode material, which is prepared using a simple coprecipitation approach. The obtained material consists of nanoparticles with sizes 30–50 nm and the multiwalled carbon nanotube embedded in it. The existence of multiwalled carbon nanotube ensures that the Ni2Fe(CN)6/multiwalled carbon nanotube composite shows excellent electrochemical performance, achieving a discharge capacity of 55.1 mAh·g–1 at 1 C and 43.2 mAh·g–1 even at 15 C. An increase in the ammonium-ion diffusion coefficient and ionic/electron conductivity based on kinetic investigations accounts for their high performance. Furthermore, detailed ex situ characterizations demonstrate that Ni2Fe(CN)6/multiwalled carbon nanotube composite offers three advantages: negligible lattice expansion during cycling, stable structure, and the reversible redox couple. Therefore, the Ni2Fe(CN)6/multiwalled carbon nanotube composite presents a long cycling life and high rate capacity. Finally, our study reports a desirable material for ammonium-ion batteries and provides a practical approach for improving the electrochemical performance of Prussian blue and its analogs.

关键词： nickel ferrocyanides     NH4+     electrochemistry     Prussian blue     aqueous ammonium ion batteries    

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Electrochemical CO reduction to C products over CuZn intermetallic catalysts synthesized by electrodeposition

《能源前沿（英文）》 doi: 10.1007/s11708-023-0898-0

摘要： Electrocatalytic CO2 reduction (ECR) offers an attractive approach to realizing carbon neutrality and producing valuable chemicals and fuels using CO2 as the feedstock. However, the lack of cost-effective electrocatalysts with better performances has seriously hindered its application. Herein, a one-step co-electrodeposition method was used to introduce Zn, a metal with weak *CO binding energy, into Cu to form Cu/Zn intermetallic catalysts (Cu/Zn IMCs). It was shown that, using an H-cell, the high Faradaic efficiency of C2+ hydrocarbons/alcohols (FEC2+) could be achieved in ECR by adjusting the surface metal components and the applied potential. In suitable conditions, FEC2+ and current density could be as high as 75% and 40 mA/cm2, respectively. Compared with the Cu catalyst, the Cu/Zn IMCs have a lower interfacial charge transfer resistance and a larger electrochemically active surface area (ECSA), which accelerate the reaction. Moreover, the *CO formed on Zn sites can move to Cu sites due to its weak binding with *CO, and thus enhance the C–C coupling on the Cu surface to form C2+ products.

关键词： carbon dioxide electroreduction     electrochemistry     co-electrodeposition     intermetallic catalysts     value-added chemicals    

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Effect of placement angles on wireless electrocoagulation for bipolar aluminum electrodes

Zhenlian Qi, Jinna Zhang, Shijie You

《环境科学与工程前沿（英文）》 2018年 第12卷 第3期 doi: 10.1007/s11783-018-1034-y

摘要： We in our previous study reported the wireless electrocoagulation (WEC) based on bipolar electrochemistry for water purification. One of the most important advantages of WEC is the omission of ohmic connection between bipolar electrode (BPE) and power supply, and thus the electrochemical reactions on BPE are driven by electric field in solution induced by driving electrodes. In this study, the impact of placement angle of bipolar aluminum electrode on WEC was investigated to provide a detailed analysis on the correlations between the bipolar electrode placement angle and bipolar electrocoagulation reactions. The results showed that the WEC cell with a horizontal BPE placed at 0° produced the maximum dissolved aluminum coagulant, accounting for 71.6 % higher than that with a vertical one placed at 90°. Moreover, the finite element simulations of current and potential distribution were carried out along the surface of BPE at different placement angles, revealing the mechanism of different BPE placement angles on aluminum dissolution rates in WEC system.

关键词： Bipolar electrochemistry     Wireless electrocoagulation     Placement angle    

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流体电化学靶向诱生硫酸根自由基降解水中微污染物 Article

郑文天, 尤世界, 姚远, 任南琪, 丁彬, 李方, 刘艳彪

《工程（英文）》 2023年 第30卷 第11期   页码 144-152 doi: 10.1016/j.eng.2022.12.005

摘要：

水中微污染物的深度去除是环境工程领域的重大挑战。受限于低浓度和高毒性等污染特征，传统水处理策略难以实现这类污染物的有效去除。基于此，本文提出了流体电化学靶向诱生硫酸根自由基（SO4•–）的研究设想，通过构筑穿透式电化学反应系统，实现了阳极将硫酸根离子（SO42−）氧化生成过硫酸根（S2O82−），再通过阴极还原反应将S2O82−转化为SO4•–。开展了流体电化学系统构造原理、硫酸根自由基靶向生成机制和微污染物降解机理等相关研究。结果表明，在最优实验条件下，该系统可在单次流模式下实现苯胺的高效降解（100%）和总有机碳的有效去除（65.0%）。该系统在宽pH范围内和复杂水基质条件下均能实现多种微污染物的有效去除。本工作基于“以废治废”理念，结合了膜分离和电化学的技术优势，有望为水中微污染物的深度去除提供一种潜在可行的技术选择。

关键词： 高级氧化     链式反应     硫酸根离子     微污染物     顺序电化学体系    

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nanoparticle decorated N-doped carbons derived from a cobalt covalent organic framework for oxygen electrochemistry

《化学科学与工程前沿（英文）》 2021年 第15卷 第6期   页码 1550-1560 doi: 10.1007/s11705-021-2104-4

摘要： The low cost and highly efficient construction of electrocatalysts has attracted significant attention owing to the use of clean and sustainable energy technologies. In this work, cobalt nanoparticle decorated N-doped carbons (Co@NC) are synthesized by the pyrolysis of a cobalt covalent organic framework under an inert atmosphere. The Co@NC demonstrates improved electrocatalytic capabilities compared to N-doped carbon without the addition of Co nanoparticles, indicating the important role of cobalt. The well-dispersed active sites (Co-Nx) and the synergistic effect between the carbon matrix and Co nanoparticles greatly enhance the electrocatalytic activity for the oxygen reduction reaction. In addition, the Co content has a significant effect on the catalytic activity. The resulting Co@NC-0.86 exhibits a superb electrocatalytic activity for the oxygen reduction reaction in an alkaline electrolyte in terms of the onset potential (0.90 V), half-wave potential (0.80 V) and the limiting current density (4.84 mA·cm–2), and a high selectivity, as well as a strong methanol tolerance and superior durability, these results are comparable to those of the Pt/C catalyst. Furthermore, the superior bifunctional activity of Co@NC-0.86 was also confirmed in a home-built Zn-air battery, signifying the possibility for application in electrode materials and in current energy conversion and storage devices.

关键词： cobalt embedment     N-doped carbons     covalent organic framework     oxygen reduction     Zn-air battery    

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国际电化学学会第70届年会（70th Annual Meeting of the International Society of Electrochemistry）

会议日期： 2019年08月04日

会议地点： 南非/德班

主办单位： 国际电化学学会（ISE）

Metal phosphonate-derived cobalt/nickel phosphide@N-doped carbon hybrids as efficient bifunctional oxygen electrodes for Zn−air batteries

《化学科学与工程前沿（英文）》 2022年 第16卷 第9期   页码 1367-1376 doi: 10.1007/s11705-022-2153-3

摘要： The exploration of efficient bifunctional electrocatalysts for oxygen reduction reaction and oxygen evolution reaction is pivotal for the development of rechargeable metal–air batteries. Transition metal phosphides are emerging as promising catalyst candidates because of their superb activity and low cost. Herein, a novel metal phosphonate-derived cobalt/nickel phosphide@N-doped carbon hybrid was developed by a carbothermal reduction of cobalt/nickel phosphonate hybrids with different Co/Ni molar ratios. The metal phosphonate derivation method achieved an intimately coupled interaction between metal phosphides and a heteroatom-doped carbon substrate. The resultant Co2P/Ni3P@NC-0.2 enables an impressive electrocatalytic oxygen reduction reaction activity, comparable with those of state-of-the-art Pt/C catalysts in terms of onset potential (0.88 V), 4e‒ selectivity, methanol tolerance, and long-term durability. Moreover, remarkable oxygen evolution reaction activity was also observed in alkaline conditions. The high activity is ascribed to the N-doping, abundant accessible catalytic active sites, and the synergistic effect among the components. This work not only describes a high-efficiency electrocatalyst for both oxygen reduction reaction and oxygen evolution reaction, but also highlights the application of metal phosphonate hybrids in fabricating metal phosphides with tunable structures, which is of great significance in the energy conversion field.

关键词： metal phosphonate     cobalt/nickel phosphide     N-doped carbon     oxygen electrochemistry     Zn−air battery    

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Probing the redox process of

Rui Lu, Wei Chen, Wen-Wei Li, Guo-Ping Sheng, Lian-Jun Wang, Han-Qing Yu

《环境科学与工程前沿（英文）》 2017年 第11卷 第1期 doi: 10.1007/s11783-017-0905-y

摘要： Fluorescece spectroelectrochemistry is used to probe redox process of benzoquinone. The benzoquinone reduction state has a lower fluorescence quantum efficiency. CVF and DCVF can reveal more information about benzoquinone redox reactions. This method can analyze compounds with fluorescence and electrochemical activities. Quinones are common organic compounds frequently used as model dissolved organic matters in water, and their redox properties are usually characterized by either electrochemical or spectroscopic methods separately. In this work, electrochemical methodology was combined with two fluorescence spectroelectrochemical techniques, cyclic volta- fluorescence spectrometry (CVF) and derivative cyclic volta- fluorescence spectrometry (DCVF), to determine the electrochemical properties of -benzoquinone in dimethyl sulfoxide, an aprotic solution. The CVF results show that the electrochemical reduction of -benzoquinone resulted in the formation of radical anion and dianion, which exhibited a lower fluorescence intensity and red-shift of the emission spectra compared to that of -benzoquinone. The fluorescence intensity was found to vary along with the electrochemical oxidation and reduction of -benzoquinone. The CVF and DCVF results were in good consistence. Thus, the combined method offers a powerful tool to investigate the electrochemical process of -benzoquinone and other natural organic compounds.

关键词： p-Benzoquinone     Electrochemistry     Fluorescence     Spectroelectrochemistry     Derivative cyclic volta fluorescence    

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Electrochemistry during efficient copper recovery from complex electronic waste using ammonia based solutions

Zhi Sun, Hongbin Cao, Prakash Venkatesan, Wei Jin, Yanping Xiao, Jilt Sietsma, Yongxiang Yang

《化学科学与工程前沿（英文）》 2017年 第11卷 第3期   页码 308-316 doi: 10.1007/s11705-016-1587-x

摘要： Leaching selectivity during metal recovery from complex electronic waste using a hydrochemical process is always one of the generic issues. It was recently improved by using ammonia-based leaching process, specifically for electronic waste enriched with copper. This research proposes electrodeposition as the subsequent approach to effectively recover copper from the solutions after selective leaching of the electronic waste and focuses on recognising the electrochemical features of copper recovery. The electrochemical reactions were investigated by considering the effects of copper concentration, scan rate and ammonium salts. The diffusion coefficient, charge transfer coefficient and heterogeneous reaction constant of the electrodeposition process were evaluated in accordance with different solution conditions. The results have shown that electrochemical recovery of copper from ammonia-based solution under the conditions of selective electronic waste treatment is charge transfer controlled and provide bases to correlate the kinetic parameters with further optimisation of the selective recovery of metals from electronic waste.

关键词： copper recovery     electronic waste     end-of-life products     selective leaching     electrodeposition    

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电化学微反应技术的工程研究进展——一种新型有机化合物电合成方法 Review

郑思源, 闫俊妤, 王凯

《工程（英文）》 2021年 第7卷 第1期   页码 22-32 doi: 10.1016/j.eng.2020.06.025

摘要：

电化学方法环境友好，在有机化学合成中具有独特的优势。然而，传统的电化学反应器存在复杂的传递问题，限制了电化学方法的应用。近年来，微反应技术在电合成研究中的应用缩短了离子的传递距离并增加了电极的比表面积，从而促成了高效、连续且易于规模化的电合成技术。本文从过程强化的角度讨论了在电合成中使用微通道的工程优势，分析了最近报道的电化学微反应器中的流型和传质行为，并列举了反应器放大的典型例子。作为一个相对较新的研究领域，在微反应器中进行电合成的许多科学规则和工程特征都有待研究。因此本文提出了潜在的研究重点，认为其对新型电合成技术的发展至关重要。

关键词： 电化学     电合成     微反应器     流动化学    

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Two-dimensional self-assembly of melem and melemium cations at pH-controlled aqueous solution–Au(111) interfaces under electrochemical control

Shinobu Uemura,Kenki Sakata,Masashi Aono,Yusuke Nakamura,Masashi Kunitake

《化学科学与工程前沿（英文）》 2016年 第10卷 第2期   页码 294-300 doi: 10.1007/s11705-016-1564-4

摘要： Two-dimensional self-assembly of melem at pH-controlled aqueous solution-Au(111) interfaces has been investigated by electrochemical scanning tunneling microscopy. In the solutions with pH>p of melem, two ordered self-assembled structures (honeycomb and close-packed structures) and one disordered fibrillar structure were observed as a function of the surface coverage of melem controlled by the electrode potential. In contrast, in the acidic solution with pH

关键词： self-assembly     scanning tunneling microscopy     electrochemistry     structural phase transition     melem    

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微生物电合成中链脂肪酸 Article

褚娜, 郝雯, 吴清莲, 梁勤军, 蒋永, 梁鹏, 任智勇, 曾建雄

《工程（英文）》 2022年 第16卷 第9期   页码 141-153 doi: 10.1016/j.eng.2021.03.025

摘要：

微生物电合成（MES）使用微生物催化剂和电化学手段促进CO2生物转化，也应用于有机废物生物炼制。本文总结了MES 利用CO2 和有机废物产中链脂肪酸（MCFA）的研究现状与发展趋势，对传统发酵产MCFA的基本原理和研究进展进行了归纳。首先，概述了MES产MCFA的相关报道，重点介绍了多电子供体（ED）策略。其次，讨论了MES利用CO2产MCFA面临的挑战，并针对产甲烷抑制、产乙酸菌三磷酸腺苷（ATP）限制、产有机溶剂阶段提供ED有限进行了详细阐述。再次，分析了电化学手段促进有机废物生物炼制产MCFA的潜力。最后，从多级反应、底物供应、产物提取、微生物代谢路径等角度展望了未来发展方向。

关键词： 电发酵     微生物电化学     产乙酸菌     碳链延长     电活性微生物    

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标题 作者 时间 类型 操作

Research progress in tribo-electrochemistry and tribo-electrochemical polishing

ZHAI Wenjie

期刊论文

Study on tribological and electrochemistry properties of metal materials in H2O2 solutions

Chengqing YUAN, Li YU, Jian LI, Xinping YAN

期刊论文

Enabling nickel ferrocyanide nanoparticles for high-performance ammonium ion storage

期刊论文

Electrochemical CO reduction to C products over CuZn intermetallic catalysts synthesized by electrodeposition

期刊论文

Effect of placement angles on wireless electrocoagulation for bipolar aluminum electrodes

Zhenlian Qi, Jinna Zhang, Shijie You

期刊论文

流体电化学靶向诱生硫酸根自由基降解水中微污染物

郑文天, 尤世界, 姚远, 任南琪, 丁彬, 李方, 刘艳彪

期刊论文

nanoparticle decorated N-doped carbons derived from a cobalt covalent organic framework for oxygen electrochemistry

期刊论文

国际电化学学会第70届年会（70th Annual Meeting of the International Society of Electrochemistry）

2019年08月04日

会议信息

Metal phosphonate-derived cobalt/nickel phosphide@N-doped carbon hybrids as efficient bifunctional oxygen electrodes for Zn−air batteries

期刊论文

Probing the redox process of

Rui Lu, Wei Chen, Wen-Wei Li, Guo-Ping Sheng, Lian-Jun Wang, Han-Qing Yu

期刊论文

Electrochemistry during efficient copper recovery from complex electronic waste using ammonia based solutions

Zhi Sun, Hongbin Cao, Prakash Venkatesan, Wei Jin, Yanping Xiao, Jilt Sietsma, Yongxiang Yang

期刊论文

电化学微反应技术的工程研究进展——一种新型有机化合物电合成方法

郑思源, 闫俊妤, 王凯

期刊论文

Two-dimensional self-assembly of melem and melemium cations at pH-controlled aqueous solution–Au(111) interfaces under electrochemical control

Shinobu Uemura,Kenki Sakata,Masashi Aono,Yusuke Nakamura,Masashi Kunitake

期刊论文

微生物电合成中链脂肪酸

褚娜, 郝雯, 吴清莲, 梁勤军, 蒋永, 梁鹏, 任智勇, 曾建雄

期刊论文