Article
Chemistry, Physical
Yuande Shi, Jiannan Cai, Xiaofeng Zhang, Zhongshui Li, Shen Lin
Summary: In this study, Co-Ni (trace)/NCNTs with superior dual-functional electrocatalytic performance for ORR and OER were successfully synthesized using a one-pot vapor deposition method. The catalyst showed excellent stability during durability testing and provides a feasible strategy for designing efficient nonnoble metal-catalysts for renewable energy conversion devices.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Abdalaziz Aljabour, Houssein Awada, Luyang Song, He Sun, Simon Offenthaler, Farzaneh Yari, Matthias Bechmann, Markus Clark Scharber, Wolfgang Schoefberger
Summary: In this study, the trimetallic cobalt(II) triazole pyridine bis-[cobalt(III) corrole] complex (CoTP)-T-II[(CoC)-C-III](2)3 is explored for its application in OER and ORR catalysis. The complex exhibits remarkable physicochemical properties, fast charge transfer kinetics, electrochemical reversibility, and durability. It shows nearly 100% selective catalytic activity towards the two-electron transfer generated H2O2, with an ORR onset potential of 0.8 V vs RHE and a cycling stability of 50,000 cycles.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
J. Zeng, T. Yang, H. Xu, W. Yu, D. Wang, J. Li, Y. Feng, J. Lu, K. P. Loh, J. Wu
Summary: In this study, a new method was reported to prepare a highly efficient catalytic material by covalently linking cobalt(III) corrole and cobalt(II) porphyrin onto a semiconducting fluoro-graphdiyne film. The material exhibited excellent performance in oxygen reduction reaction and zinc-air battery, outperforming commercial Pt/C.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Ki Ro Yoon, Chang-Kyu Hwang, Seung-hoon Kim, Ji-Won Jung, Ji Eon Chae, Jun Kim, Kyung Ah Lee, Ahyoun Lim, Su-Ho Cho, Jitendra Pal Singh, Jong Min Kim, Kihyun Shin, Byung Moo Moon, Hyun S. Park, Hyoung-Juhn Kim, Keun Hwa Chae, Hyung Chul Ham, Il-Doo Kim, Jin Young Kim
Summary: Optimized design of bifunctional oxygen electrocatalysts is crucial for achieving high-performance energy conversion systems. The novel CoOx@CoNy/NCNF hybrid catalyst exhibits excellent oxygen reduction and oxygen evolution reaction activity, catalyzing redox reactions effectively and enhancing the stability of Zn-air batteries.
Article
Nanoscience & Nanotechnology
Xu Guo, Meixin Yu, Xin Chang, Xinzhi Ma, Mingyi Zhang
Summary: Designing hierarchical structures for electrocatalysts by embedding CoS2 nanoparticles in carbon nanotube-grafted carbon nanofibers (CNF/CoS2-CNT) has been shown to enhance electrochemical performance. The hierarchical structure enables efficient electron transport, inhibits catalyst agglomeration, and provides stability.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yimei Gao, Benxing Mei, Yizhen Wu, Qian Zhao, Zijia Bao, Haonan Qin, Yuhan Xu, Haoyuan Lv, Xinyang Peng, Yan He, Ting Luo, Ran Yao, Wei Zhang, Haitao Lei, Rui Cao
Summary: This study reports on the synthesis of Co-III corrole 1 tethered with an imidazole ligand and its electrocatalytic ORR and O-2 binding features. Compared to the imidazolium-free analogue, complex 1 showed significantly enhanced selective 4e(-)/4H(+) ORR activity in 0.1 mol/L KOH solutions, with a half-wave potential of E-1/2 = 0.82 V (vs RHE). Importantly, the tethered axial imidazole ligand improved the O-2 binding ability of 1 thermodynamically and dynamically, crucial for boosting electrocatalytic ORR performance. This work provides an example of enhancing the electrocatalytic ORR activity and selectivity of Co corroles by introducing an axial imidazole ligand to enhance O-2 binding and activation.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Lei Huang, Ya-Qiong Su, Ruijuan Qi, Dai Dang, Yanyang Qin, Shibo Xi, Shahid Zaman, Bo You, Shujiang Ding, Bao Yu Xia
Summary: Integrated fabrication of porous Pt-rich alloy encapsulated by graphitic carbon via integration engineering exhibits optimized reaction pathway and improved oxygen reduction reaction performance. The hybrid catalyst outperforms commercial Pt/C catalyst in full-cell assessment, attributed to the mutual assistance between porous Pt alloy and Co-N-C.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Yuanjie Zheng, Peng Wang, Wei-Hsiang Huang, Chi-Liang Chen, Yanyan Jia, Sheng Dai, Tan Li, Yun Zhao, Yongcai Qiu, Geoffrey I. N. Waterhouse, Guangxu Chen
Summary: Electrochemical production of H2O2 is an eco-friendly and cost-effective method. Metal-doped carbon-based catalysts are commonly used for 2e-ORR due to their high selectivity. The role of metals and carbon defects in H2O2 production is still unclear. This study obtained a Co-N/O-C catalyst with a Faradaic efficiency greater than 90% in alkaline electrolyte by varying the Co loading in the pyrolysis precursor. Detailed studies revealed that carbon atoms in C-O-C groups at defect sites were the active sites for 2e-ORR in the Co-N/O-C catalysts. The direct contribution of cobalt single atom sites and metallic Co for the 2e-ORR performance was negligible, but Co played an important role in the pyrolytic synthesis of the catalyst.
Article
Energy & Fuels
Paul-Gabriel Julliard, Manel Hanana, Laurent Alvarez, Renaud Cornut, Bruno Jousselme, Gabriel Canard, Stephane Campidelli
Summary: The study focuses on the synthesis of chemically robust hybrid catalysts for the oxygen reduction reaction (ORR) through the polymerization of cobalt(III) corroles and conductive carbon nanotubes via CuAAC. Characterization techniques including UV-vis-NIR absorption, Raman and XPS spectroscopies, and SEM imaging were used to investigate the assembly process of the hybrid system. The hybrid catalyst exhibited a significant overpotential compared to a platinum reference catalyst ink, indicating its potential for ORR applications in acidic media.
Article
Chemistry, Physical
Wei Peng, Junhong Jin, Shenglin Yang, Zhigang Shen, Hetuan Wang, Jingjing Zhang, Guang Li
Summary: In this study, NiCo alloy-based nanoparticles anchored on carbon nanotube-decorated carbon nanorods were synthesized from the pyrolysis of NiCo metal-organic frameworks for efficient and durable oxygen electrocatalysis in ZAFBs. By adjusting the ratio of Ni2+ and Co2+, the prepared Ni2Co2-CNR sample exhibited excellent ORR and OER catalytic performances. The ZAFB assembled with the Ni2Co2-CNR catalyst showed narrow voltage gap and remarkable operation durability with 1200 cycles at 5 mA cm(-2).
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yijie Wang, Aoshuang Li, Chuanwei Cheng
Summary: The study reports an efficient bifunctional oxygen electrocatalyst Co(OH)(2)@NC, showing excellent bifunctional activity, and exhibiting outstanding performance in rechargeable Zn-air batteries.
Article
Nanoscience & Nanotechnology
Ting Zhang, Fang Cheng, Chuyi Zhao, Hao Liu, Xiaokai Song, Xiaopeng Li, Wei Luo
Summary: In this study, a novel strategy of enriching atomically dispersed cobalt species in nitrogen-doped carbon was reported, resulting in an increase of Co atom density in the ultrathin carbon shell. The hollow carbon nanosphere with reduced shell thickness obtained by a carbothermic reaction between carbon and ZnO template, demonstrated promising oxygen reduction reaction performance in both strong acidic and alkaline electrolytes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Haoran Pan, Xinning Huang, Zhenjie Lu, Zhiqiang Zhang, Baigang An, Dongling Wu, Tao Wang, Xingxing Chen, Fangyi Cheng
Summary: This study presents a hybrid Co-based carbon composite derived from ZIF-67 as a bifunctional ORR/OER electrocatalyst, showing excellent performance and stability in a custom-built Zn-air battery. The catalyst, with multiple active sites including Co-N4, Co-N/SC, C-N/S-C, Co3O4 and CoS, as well as surface and edge defects in the carbon matrix, exhibits highly efficient bifunctional ORR/OER catalytic activity for reversible oxygen electrodes. The catalyst demonstrates competitive performance against state-of-the-art bifunctional ORR/OER electrocatalysts reported to date, positioning it among the best non-precious metal catalysts for reversible oxygen reactions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Yining Jia, Chunjing Shi, Wei Zhang, Wei Xia, Ming Hu, Rong Huang, Ruijuan Qi
Summary: In this study, a catalyst of iron single atoms anchored on nitrogen-doped carbon matrix/ carbon nanotube hybrid supports was successfully prepared. It exhibits low cost, high selectivity, and high activity in the oxygen reduction reaction. The catalyst showed excellent activity and stability, making it a potential replacement for the latest commercial Pt/C catalyst.
Article
Chemistry, Physical
Amit Kumar, Shachar Fite, Arik Raslin, Sachin Kumar, Amir Mizrahi, Atif Mahammed, Zeev Gross
Summary: Current technologies for hydrogen production have a large carbon footprint, but water electrolysis using platinum electrodes is only responsible for less than 5% of hydrogen production. In this study, cobalt electrocatalysis for proton reduction was investigated as an alternative to platinum. The most electron-rich cobalt complex exhibited comparable catalytic activity to platinum, with lower overpotential and higher faradaic efficiency. Mechanistic investigations revealed that the superior performance of the electron-rich complex is attributed to its ability to reduce protons by singly reduced cobalt.
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)