Article
Chemistry, Multidisciplinary
Zhiyu Shao, Qian Zhu, Yu Sun, Yuan Zhang, Yilan Jiang, Shiqing Deng, Wei Zhang, Keke Huang, Shouhua Feng
Summary: This study reports the synthesis of a NiS/NiFe2O4 composite through local metal-S coordination at the interface. The introduction of NiS/NiFe2O4 interfaces during plasma energy irradiation is confirmed by X-ray absorption fine structure and electron energy loss spectroscopy. Density functional theory calculations reveal that in situ phase reconfiguration is crucial for catalyzing the oxygen evolution reaction. This work provides a new compositing strategy for fast phase reconstruction of bifunctional catalysts.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Huizhou Zhong, Guoping Gao, Xuening Wang, Hengyi Wu, Shaohua Shen, Wenbin Zuo, Guangxu Cai, Guo Wei, Ying Shi, Dejun Fu, Changzhong Jiang, Lin-Wang Wang, Feng Ren
Summary: Utilizing ion irradiation technology, a nanosheet structured NiO/NiFe2O4 heterostructure with rich oxygen vacancies was achieved, leading to enhanced catalytic performance in both oxygen evolution reaction (OER) and hydrogen evolution reaction.
Article
Chemistry, Analytical
Murendeni I. Nemufulwi, Hendrik C. Swart, Katekani Shingange
Summary: Heterojunction interfaces between metal-oxides can significantly improve gas sensing through charge distribution caused by lattice mismatch. This study focuses on the positive synergistic effects of ZnO/ZnFe2O4 heterostructure, which exhibited the best sensing performance among pure ZnO and ZnFe2O4. The enhanced sensing properties were attributed to the higher concentration of oxygen vacancies at the ZnO/ZnFe2O4 interface and enhanced catalytic activity.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Oscar Ambriz-Pelaez, Jose Bejar, C. M. Ramos-Castillo, Minerva Guerra-Balcazar, Lorena Alvarez-Contreras, Noe Arjona
Summary: Layered double hydroxides (LDHs) were modified by surface engineering to enhance their activity in the oxygen evolution reaction (OER) for rechargeable Zn-air batteries (ZABs). The introduction of oxygen vacancies (Ov)-type surface defects resulted in improved performance for OER and oxygen reduction reaction (ORR), comparable to benchmarked Pt/C.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Hongjiao Huang, Aoming Huang, Di Liu, Wentao Han, Chun-Han Kuo, Han-Yi Chen, Linlin Li, Hui Pan, Shengjie Peng
Summary: In this study, oxygen vacancy-rich porous perovskite oxide (CaMnO3) nanofibers coated with reduced graphene oxide (rGO) were developed as the air electrode catalyst for low-temperature and knittable Zn-air batteries. The V-CMO/rGO exhibited top-level oxygen reduction reaction (ORR) activity among perovskite oxides and showed impressive kinetics under low temperature. The V-CMO/rGO demonstrated high peak power density of 56 mW cm(-2) and long cycle life of over 80 h at a low temperature of -40°C.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Jiajia Li, Lixin Sun, Xueying Wang, Ling Li, Qiancheng Zhu, Bo Ouyang, Erjun Kan, Wenming Zhang
Summary: A 3D nano-aerogel electrocatalyst is produced by combining metal Ni with Gd2O3 species through a hydrogel route. The designed Gd2O3-Ni/CNT heterostructure shows high efficiency for oxygen reduction electrocatalysis, surpassing the performance of commercial Pt/C. The superior performance is attributed to the electronic reconfiguration between Gd(2)O(3) and Ni in the heterostructure, optimizing the adsorption and breaking the scaling relation between OOH* and OH*.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Jie Zhu, Qian Zhang, Peng Zhao, Lin Chen, Sudong Yang, Qiang Yan, Hongmei Li
Summary: This study focuses on the development of robust and high-performance bifunctional electrocatalysts for overall water splitting. Pine-needle-like NiFe2O4@Co3O4 heterostructure nanoarrays with abundant oxygen vacancies were deposited onto nickel foam, showing outstanding catalytic activity and high electrochemical stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Huijuan Yang, Yulin Zhang, Yifan Li, Xiaokang Li, Lina Chen, Jinjuan Dong, Jian Qin, Yangyang Luo, Jingjing Wang, Wenbin Li, Zhiyou Zhou, Xifei Li
Summary: Constructing heterointerfaces of transition metal sulfides is an effective strategy for enhancing the catalytic activity of oxygen evolution reaction (OER) by modulating their electronic structures. Incorporating these sulfides with a carbon-based support can improve their catalytic stability. In this work, FeS and Ni3S2 were encapsulated in N-doped carbon to form FeS/Ni3S2-x/NC heterostructure, and its catalytic activity was optimized by adjusting the ratio of Fe and Ni precursors. The optimized FeS/Ni3S2-2/NC heterostructure exhibited a high OER catalytic activity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yonglong Huang, Yuzhou Liu, Yanzhu Deng, Jing Zhang, Beibei He, Jian Sun, Zhihong Yang, Wei Zhou, Ling Zhao
Summary: This study proposes a novel air electrode using oxygen vacancies-rich CeO2 decorated CoSe2 nanocubes as a catalyst to drive oxygen evolution and reduction reactions in rechargeable Zn-air batteries. The CeO2 coupled CoSe2 nanocubes catalyst exhibits enhanced bifunctional activity, and the assembled Zn-air battery using this electrode shows high power density and long-life stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Yongyin Liang, Hang Lei, Songjie Wang, Zilong Wang, Wenjie Mai
Summary: Researchers designed a new Pt/Zn NPs heterostructure to enhance the catalytic properties and stability of neutral Zn-air batteries, achieving remarkable experimental results.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jingjing Cai, Huijian Zhang, Lizhu Zhang, Yuqing Xiong, Ting Ouyang, Zhao-Qing Liu
Summary: The electronic structure of transition metal complexes can be modulated by replacing partial ions, which can lead to tuned electrocatalytic activity for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). However, the ORR activity of anion-modulated transition metal complexes is still unsatisfactory and it remains challenging to construct hetero-anionic structures. In this study, atomic doping strategy was used to prepare CuCo2O4-xSx/NC-2 (CCSO/NC-2) electrocatalysts, which showed excellent catalytic performance and durability for ORR and OER due to the partial substitution of S atoms for O in CCSO/NC-2. The introduction of S optimized the reaction kinetics and promoted electron redistribution.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Yi Xiong, Zhongqing Jiang, Longxiang Gong, Xiaoning Tian, Changsheng Song, Thandavarayan Maiyalagan, Zhong-Jie Jiang
Summary: In this study, a N-doped carbon coated Co/FeCo@Fe(Co)3O4 hetero-junction rich in oxygen vacancies derived from metal-organic frameworks (MOFs) was successfully constructed by O2 plasma treatment. The catalyst P-Co3Fe1/NC-700-10 with optimal O2 plasma treatment time of 10 min reduces the potential gap between OER and ORR to 760 mV, much lower than the commercial 20% Pt/C + RuO2 catalyst (910 mV). This work provides an effective idea for the development of high-performance bifunctional electrocatalyst and the application of RZABs.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Environmental
Yue Wang, Xiaodong Wu, Xian Jiang, Xiangrui Wu, Yawen Tang, Dongmei Sun, Gengtao Fu
Summary: Interface engineering is an effective strategy to optimize catalysts, but controlled synthesis of rich-phase boundaries remains challenging. This study presents a bifunctional oxygen electrocatalyst with mesoporous CoS/CoO heterojunction nanorods, which demonstrated outstanding electrocatalytic performance for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). The designed nanorods have a unique structure and increased oxygen vacancies, leading to improved performance in electrocatalysis.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Electrochemistry
Kangdi Lin, Zihao Zhou, Chenting Peng, Jinlian Zhang, Hongyun Huang, Meijie Chen, Ming Sun, Lin Yu
Summary: Solid-state zinc-air batteries (ZABs) are a promising choice for next-generation energy storage devices in AI and wearable technology. However, the unsatisfactory catalytic performance and poor contact with electrolytes hinder their effectiveness. This study presents a bifunctional catalyst (oxygen reduction and evolution reactions) composed of NiCo layered double hydroxide@NiCo2S4 with well-designed heterointerfaces, enhancing electronic interaction and optimizing energy-level configuration. The catalyst exhibits fast charge transfer kinetics and enhanced activity, leading to excellent power density of 88.4 mW cm-2 and high round-trip efficiency of 74.3% in solid-state ZABs. This work provides valuable insights into the structure-activity relationship for high-performance ZABs using heterostructure catalysts.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Yubing Liu, Zhongqing Jiang, Zhong-Jie Jiang
Summary: A plasma approach is used to synthesize a carbon cloth supported carbon fiber and oxygen defect-rich NiCoO/NiCoN hetero-nanowire co-integrated hybrid catalyst. This catalyst exhibits high activity in oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). It shows promising potential for application in all-solid-state zinc-air batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
