Article
Environmental Sciences
Mabrook S. Amer, Prabhakarn Arunachalam, Abdullah M. Al-Mayouf, Ahmad A. Alsaleh, Zeyad A. Almutairi
Summary: A low-cost electrode material is developed for electrocatalytic water and urea oxidation reactions, which are crucial for generating hydrogen. This material exhibits high efficiency and durability in oxygen evolution reaction (OER) and urea oxidation reaction (UOR).
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Heng Liu, Luozhen Jiang, Javid Khan, Xinxin Wang, Jiamin Xiao, Handong Zhang, Haijiao Xie, Lina Li, Shuangyin Wang, Lei Han
Summary: By utilizing post-adsorption and secondary pyrolysis, we have successfully constructed single-atomic Mn sites decorated with atomic clusters, which exhibit excellent performance in oxygen reduction reaction (ORR).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Hak-Joo Lee, Deok-Hye Park, Woo-Jun Lee, Sang-Beom Han, Min-Ha Kim, Jeong-Hyeon Byeon, Kyung-Won Park
Summary: The Ir-doped NiCo2O4 catalyst shows enhanced electrocatalytic activity for the oxygen evolution reaction due to the oxygen vacancies formed by Ir doping, leading to improved electrical conductivity and tunable adsorption energies. Compared to IrO2, the doped catalyst exhibits better OER performance and stability in both individual and overall water splitting tests.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Nanoscience & Nanotechnology
A. Li, Y. Wang, C. Cheng
Summary: An innovative air cathode material, Co3O4@WO3 composite arrays, with high activity, stability, and low cost, is reported for high-performance rechargeable Zn-air batteries.
MATERIALS TODAY NANO
(2023)
Article
Chemistry, Multidisciplinary
Fang Luo, Shuyuan Pan, Yuhua Xie, Chen Li, Yingjie Yu, Haifeng Bao, Zehui Yang
Summary: This study reports an efficient and stable water splitting technology using iridium single atoms as catalysts for hydrogen evolution reaction and hydrazine oxidation reaction. Compared to traditional water splitting, this method significantly reduces the voltage required for the reactions and achieves superior stability.
Article
Chemistry, Physical
Narayanamoorthy Bhuvanendran, Min Gyeong Choi, Doeun Kim, Sae Youn Lee
Summary: A simple hydrothermal method was used to synthesize different forms of nanostructured Co3O4 spinel oxides, which exhibited excellent electrocatalytic activity towards oxygen reduction reaction, oxygen evolution reaction, and hydrogen evolution reaction. The study investigated the surface morphology and structural features of the Co3O4 spinel oxide catalysts, revealing that the slab-form catalysts had a high Co3+/Co2+ ratio and an abundance of oxygen vacancies, resulting in improved performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Tianyun Zhang, Shichao Zhao, Chuanming Zhu, Jing Shi, Chao Su, Jiawen Yang, Meng Wang, Jun Li, Junhui Li, Pingle Liu, Conghui Wang
Summary: This study proposed a model-etching strategy to investigate the chemical etching of Co3O4 for improving the performance of oxygen evolution reaction (OER). The {111} facets were found to serve as etch-stop facets and H2SO4 molecules played a special role in creating the active center of OER. The results suggest that rational optimization of the surface structures of Co3O4 can lead to highly active OER electrocatalysts.
Article
Chemistry, Physical
Sabarinathan Ravichandran, Narayanamoorthy Bhuvanendran, Qian Xu, Thandavarayan Maiyalagan, Lei Xing, Huaneng Su
Summary: The efficient oxygen bifunctional catalyst Pt-Ru-Ir with ordered mesoporous nanostructures (OMNs) and low Ir content shows promising performance in electrochemical energy conversion and storage applications, demonstrating superior activity in both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The electronic coupling between Pt, Ru, and Ir, along with the alloy formation with different lattice strain percentages, plays a significant role in enhancing the electrocatalytic performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Anil U. Kumar, Asis Sethi, Reen Maria Lawrence, Vishal M. Dhavale
Summary: A Co-Co3O4/NC catalyst with high stability and low overvoltage has been synthesized and shown to be efficient for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline conditions, potentially leading to energy savings compared to traditional Pt/C and IrO2 catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Jieyu Yang, Fenghua Xu, Wenli Zhao, Luqiong Liu, Baicheng Weng
Summary: This study proposes a simple method to improve the performance of Co3O4 by incorporating large-sized single atoms, which enhances its interaction and charge transfer with absorbents for more efficient oxygen evolution reaction. Additionally, a solar water-splitting device constructed using this method achieves a high solar-to-hydrogen conversion efficiency.
Article
Chemistry, Physical
Jadranka Milikic, Sara Knezevic, Milos Ognjanovic, Dalibor Stankovic, Lazar Rakocevic, Biljana Sljukic
Summary: Porous cobalt (III) oxide (Co3O4) and mixed cobalt (III) oxide -tin oxide (Co3O4/SnO2) with spherical morphology were prepared by a novel template-based hydrothermal method. They showed excellent performance as bifunctional electrocatalysts for oxygen reduction and evolution reactions in alkaline media, comparable to the commercial Pt/C electrocatalyst. Both materials exhibited low charge transfer resistance and low onset potential for oxygen evolution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Xiaoke Zhang, Qianfeng Liu, Zhao Yan, Shimin Liu, Erdong Wang
Summary: In this study, CuO/Co3O4@CNTs catalysts were successfully prepared for bifunctional oxygen electrocatalysts using a facile and scalable coprecipitation strategy. This unique strategy allowed the uniform growth of CuO/Co3O4 nanoparticles on CNTs and the simultaneous pyrolysis process resulted in the generation of ultrafine CuO/Co3O4 heterostructures. Due to an abundance of heterostructures, oxygen vacancies and unsaturated chemical bonds were generated in CuO/Co3O4. As a result, CuO/Co3O4@CNTs exhibited bifunctional activity with a Delta E of 0.78 V and good stability, maintaining 1000 hours of charge and discharge cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Huiyan Zeng, M'hamed Oubla, Xuepeng Zhong, Nicolas Alonso-Vante, Fei Du, Yu Xie, Yunhui Huang, Jiwei Ma
Summary: By introducing oxygen vacancies and fluorine anions, the catalytic activity for oxygen evolution reaction (OER) was enhanced. Theoretical calculations were consistent with experimental results, providing a pathway for designing new defective fluorinated oxides.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Kumar Kashyap Hazarika, Yusuke Yamada, Ekaterina V. Matus, Mikhail Kerzhentsev, Pankaj Bharali
Summary: The transition metal oxide based electrocatalyst with mixed valence state exhibits high activity and stability, showing promising potential for oxygen electrocatalysis.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Chao Wang, Xiaoqiang Du, Xiaoshuang Zhang
Summary: A new method is proposed to exploit W-Co3S4@Co3O4 heterostructures for electrochemistry splitting of water. The W-Co3S4@Co3O4 material exhibits excellent catalytic performance under alkaline conditions, providing a new perspective for the development of electrodes synthesis and bifunctional catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
