Article
Energy & Fuels
Rajib Samanta, Prajnashree Panda, Ranjit Mishra, Sudip Barman
Summary: In this study, an IrO2-modified RuO2 nanowires/nitrogen-doped carbon composite catalyst with excellent OER and HER activities was synthesized. The catalyst exhibited low overpotential and high current density at different pH values, attributed to its unique nanowire structure and synergistic interaction, providing new design possibilities for renewable energy conversion.
Article
Chemistry, Multidisciplinary
Songsong Li, Lu Wang, Hui Su, Anh N. Hong, Yanxiang Wang, Huajun Yang, Lei Ge, Weiyu Song, Jian Liu, Tianyi Ma, Xianhui Bu, Pingyun Feng
Summary: This study reports the synthesis of high efficiency electrocatalysts based on S-doped NiFeP and improves the reaction performance by tuning the electronic structure. The research provides a new strategy for designing highly active non-noble metal catalysts.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Rohit Anand, Arun S. Nissimagoudar, Muhammad Umer, Miran Ha, Mohammad Zafari, Sohaib Umer, Geunsik Lee, Kwang S. Kim
Summary: In this study, it is demonstrated that late transition metal doping can significantly enhance the HER/OER activities of MXenes. By embedding a single Ni or Co atom into MXenes, it provides a suitable amount of electrons for optimal adsorbate evolving mechanism, resulting in activated lattice oxygen mechanism. The stability and bifunctional catalytic capability of MXene combinations towards both HER and OER are shown.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xiaozhong Zheng, Minkai Qin, Shuangxiu Ma, Yuzhuo Chen, Honghui Ning, Rui Yang, Shanjun Mao, Yong Wang
Summary: In this study, constructing strong oxide-support interaction (SOSI), ultrafine iridium oxide nanoclusters were anchored on a vanadium oxide support, leading to significant performance enhancement in the oxygen evolution reaction (OER). The distorted IrO2 active sites in the catalyst facilitate the O-O coupling process, resulting in low overpotentials and high-performance water electrolysis over a broad pH range. SOSI also ensures the stability of the catalyst.
Article
Chemistry, Physical
Qianqian Fu, Hui Wang, Kunlun Nie, Xuyun Wang, Jianwei Ren, Rongfang Wang
Summary: In this study, P, S co-doped NiCoPxSy nanowire array catalysts were synthesized on a nickel foam substrate using a stepped preparation strategy. The prepared catalysts exhibited excellent electrocatalytic performance, enabling simultaneous hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) on both the anode and cathode. This research provides an effective method for designing innovative catalysts and producing clean energy.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Multidisciplinary
Dong Cao, Zhirong Zhang, Yahui Cui, Runhao Zhang, Lipeng Zhang, Jie Zeng, Daojian Cheng
Summary: In this study, highly active catalysts consisting of high-density Pt and Ir single atoms anchored on Co(OH)(2) were constructed for green hydrogen production. The catalysts exhibited excellent catalytic activity and efficiency in alkaline water electrolysis, demonstrating great potential for practical applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Herbert Over
Summary: This passage discusses electrocatalytic water splitting and the use of RuO2 and IrO2 in the OER process under acidic conditions. It also touches on the microscopic understanding of corrosion processes and the rate-determining steps in OER over these oxides. Ultimately, it aims to uncover the material properties underlying observed electrochemical stability and activity.
Article
Chemistry, Multidisciplinary
Suraj Loomba, Muhammad Waqas Khan, Muhammad Haris, Seyed Mahdi Mousavi, Ali Zavabeti, Kai Xu, Anton Tadich, Lars Thomsen, Christopher F. F. McConville, Yongxiang Li, Sumeet Walia, Nasir Mahmood
Summary: Hydrogen is an emerging clean fuel alternative, but its dependence on freshwater poses a threat to sustainability. Seawater, an abundant source, can be used as an alternative, but its high salt content causes corrosion and hinders its use. To overcome this, a unique catalyst composed of nitrogen-doped NiMo3P sheets with large homogenous pores is designed. The introduction of N and Ni optimizes surface energies, creates new active sites, and enhances stability, resulting in remarkable performance for hydrogen evolution and water splitting in seawater.
Review
Chemistry, Physical
Chongao Tian, Rui Liu, Yu Zhang, Wenxiu Yang, Bo Wang
Summary: Electrolytic water splitting is a feasible and promising technique for hydrogen energy production, but the slow kinetic rate of hydrogen/oxygen evolution reactions leads to high overpotential and low energy efficiency. Pt/Ir-based nanocatalysts have become the state-of-the-art catalysts, but their high cost and low earth abundance limit their applications. Ru-based nanomaterials, particularly Ru-doped functional porous materials, have attracted attention for their low price, Pt-like hydrogen bond strength, and high EWS activity. This review summarizes the design and preparation strategies of Ru-doped functional porous materials for EWS, as well as the structure-activity relationships induced by the tuned geometric/electronic structures. The challenges and perspectives of Ru-doped functional porous materials catalysts are also proposed.
Article
Chemistry, Physical
Wei Deng, Yuping Gai, Dan Li, Zhide Chen, Wenshuo Xie, Jun Yu, Renqiang Yang, Xichang Bao, Fei Jiang
Summary: Reasonable design and synthesis of hetero atom metal coordination compounds on the atomic scale can significantly improve the performance of catalysts. For example, CoSSeNi-Pt/C can greatly enhance the hydrogen evolution reaction (HER) activity and exhibit excellent long-time durability in alkaline media.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Huibin Li, Yinzhi Pan, Lei Wu, Rui He, Zirong Qin, Shasha Luo, Lijun Yang, Jianhuang Zeng
Summary: This work reports the oxygen evolution reaction (OER) performance of nanosized iridium oxide-nanosheet-like electrocatalysts synthesized by a modified Adams method. By introducing cysteamine hydrochloride during the synthesis process, the morphology of the iridium oxide transformed from spherical particles to nanosheet-like structure. The electrochemical evaluation results show that the IrO2 synthesized at 400°C exhibits the best performance in terms of enhanced mass activity and lower overpotential compared to counterparts prepared at other temperatures. Ta2O5 was further incorporated to improve the stability of iridium oxide, and the optimized IrO2-Ta2O5 nanosheets with a 7:3 M ratio of Ir/Ta outperform the commercial IrO2 benchmark in terms of OER activity and stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Yue Wang, Pengfei Yang, Yuecheng Gong, Dongzheng Liu, Silu Liu, Weiping Xiao, Zhenyu Xiao, Zhenjiang Li, Zexing Wu, Lei Wang
Summary: The development of highly efficient and low-cost electrocatalysts for hydrogen/oxygen evolution reactions is crucial for their large-scale practical applications. The use of corrosive engineering and low-temperature phosphorization approach enables the preparation of Mo-doped NiFeP on nickel-iron foam with amorphous morphology, porous structure, and superhydrophilic surface, providing abundant active sites and facilitating charge transfer. The prepared Mo-NiFeP/NIF exhibits excellent electrocatalytic performance for OER and HER with low overpotentials and remarkable stability under large current density.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Shuangxiong Liao, Tieqi Huang, Weiying Wu, Ting Yang, Qianqian Hou, Shangbin Sang, Kaiyu Liu, Yahui Yang, Hongtao Liu
Summary: High-entropy oxides (HEOs), as a common type of high-entropy materials, have limited active sites due to their high crystallization. In this study, a surface activation strategy was proposed to enhance the electrocatalytic activity of HEOs by introducing abundant surface oxygen vacancies using resin templating and temperature regulation. The modulated (Fe0.27Ni0.35Co0.24Cr0.10Mn0.04)2O3-δ HEO exhibited a stable structure, large electrochemical surface area, and robust electrocatalytic activity towards both oxygen and hydrogen evolution reactions. The assembled water splitting cell achieved a low voltage of 1.55 V to achieve 10 mA cm-2 current density, outperforming commercial noble metal electrocatalysts. This work provides a new approach for designing structure-stable HEOs for efficient electrocatalytic applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
Chenglong Jin, Mengyu Hou, Xi Li, Dan Liu, Deyu Qu, Yulin Dong, Zhizhong Xie, Chaocan Zhang
Summary: An efficient electrochemical method was used to fabricate Fe-doped Ni-Se on Ni foam substrate for water splitting. The unique 3D structure of the substrate and the hybrid Ni-Se materials contribute to the excellent electrocatalytic performance. The Fe4Ni-Se/NF electrode shows low overpotential, small Tafel slopes, and outstanding stability during continuous operation.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Shi Chen, Wenjing Liang, Xinyi Wang, Yueqi Zhao, Shuo Wang, Zheng Li, Shengmei Wang, Li Hou, Yang Jiang, Faming Gao
Summary: In this paper, carbon skeleton supported CoNi bimetallic sulfides catalysts modified with phosphorus doping were successfully synthesized. The catalyst exhibits low overpotential in hydrogen evolution reaction and oxygen evolution reaction, and shows remarkable performance and good stability in overall water splitting.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)