Article
Chemistry, Multidisciplinary
Lei Liu, Huan Liu, Xingwei Sun, Jie Bai, Chunping Li
Summary: In this study, a flower-like Mo2C-based electmcatalyst was prepared using preoxidized fiber films as a precursor and achieved nitrogen doping through the pyrolysis of a mixture of urea and ammonium molybdate tetrahydrate. The N-Mo2C/CNFs-900 electrocatalyst exhibited excellent HER activity and stability.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Qianqian Du, Ruihua Zhao, Tianyu Guo, Lu Liu, Xiaojun Chen, Jie Zhang, Jianping Du, Jinping Li, Liqiang Mai, Tewodros Asefa
Summary: This study reports a successful synthesis of Mo2C nanodots electrocatalyst by dispersing nanodots in 3D cage-like carbon microparticles using rationally designed Mo-based xerogels as precursors. The process maintains the structure while demonstrating excellent electrocatalytic activity and relative stability. The work also shows a promising synthetic route and procedure for other well-dispersed yet stable nanocatalysts.
Article
Chemistry, Physical
Weiwen Wang, Lu Zhang, Chen Gao, Huang Zhu, Xing Yang, Chong Cheng, Xikui Liu, Shuang Li
Summary: In this study, a stable Mo-based catalyst was fabricated by pyrolysis of Mo, Ni adsorbed two-dimensional covalent organic framework (COF). The derived catalyst, Mo2C-MoNi4@NC, showed excellent HER activity and remarkable stability due to the protective effect of the nitrogen-doped graphene shell layer.
APPLIED SURFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Perla Hajjar, Marie-Agnes Lacour, Nathalie Masquelez, Julien Cambedouzou, Sophie Tingry, David Cornu, Yaovi Holade
Summary: This study successfully synthesized different chalcogenides of nickel and cobalt on a carbon-nitrogen-sulfur nanostructured network as heterogeneous electrocatalysts for both hydrogen and oxygen evolution reactions in simulated alkaline seawater. The electrocatalysts exhibited high selectivity and stability, achieving superior OER current densities and outperforming previously reported data.
Article
Electrochemistry
Banggang Qin, Chengkai He, Yujie Wei, Lvlv Ji, Tao Wang, Zuofeng Chen, Sheng Wang
Summary: In this study, a robust hydrogen evolution reaction (HER) electrocatalyst Mo2C-Ru@CNBs was designed and synthesized, which consisted of heterostructured Mo2C-Ru nanoparticles dispersed on three-dimensional interconnected carbon nanobelts (CNBs). The Mo2C-Ru@CNBs catalyst exhibited high HER catalytic activity with ultralow overpotentials of 17 and 18 mV at 10 mA cm-2 in acidic and alkaline media, respectively, surpassing the performance of individual components, commercial 20% Pt/C, and recently reported Mo- and Ru-based electrocatalysts. Density functional theory calculations revealed the extensive electronic interaction between Mo2C and Ru at the heterointerfaces, leading to well-modulated electronic structure for optimized intrinsic catalytic activity and enhanced electrical conductivity.
ELECTROCHIMICA ACTA
(2023)
Article
Polymer Science
Razik Djara, Marie-Agnes Lacour, Abdelhafid Merzouki, Julien Cambedouzou, David Cornu, Sophie Tingry, Yaovi Holade
Summary: A new strategy of fabricating conducting polymer-derived nanostructured materials has been developed to accelerate the electrocatalytic hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and water splitting. The findings show that by controlling the synthesis process, efficient water electrolysis reactions can be achieved, producing highly efficient and stable nanostructured electrocatalysts.
Article
Chemistry, Physical
Sanjay Upadhyay, O. P. Pandey
Summary: A facile and cost-effective method using laboratory waste has been proposed to synthesize Mo2C nanoparticles and Mo2C/MnO2 heterostructures. These samples exhibit high HER activity and capacitive properties, making them suitable for electrocatalytic reactions.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Meichen Yuan, Zhongxiang Nie, Zeming Tang, Qingxue Lai, Yanyu Liang
Summary: Green hydrogen, generated by decomposing water using sustainable energy, is considered the ideal method to convert electricity into chemical energy. This study successfully assembled well-designed Ni-doped Mo2C nanorod electrodes on three different substrates, creating a wide pH applicable electrode for Hydrogen Evolution. Among them, Ni-doped Mo2C nanorod arrays on stainless steel wire mesh (Ni-Mo2C@SSW) exhibited remarkable electrocatalytic properties with superior overpotentials in both alkaline and acidic conditions and exceptional continuous durability. This research opens up possibilities for low-cost, highly active, and ultra-stable electrocatalysts for practical industrial applications.
Article
Chemistry, Physical
Zhen Hu, Jian Chen, Peiyao Pan, Chao Liu, Jingming Zeng, Yang Ou, Xiaopeng Qi, Tongxiang Liang
Summary: Exploration for an earth-rich and competent electrocatalyst for the hydrogen evolution reaction (HER) is a significant and challenging approach to confronting the resources shortage and environmental crisis. Porous N-doped Mo2C@C (N-Mo2C@C) nanoparticles self-encapsulated in nanospheres are presented as a high-performing HER electrocatalyst fabricated through a one-pot solvothermal method followed by hydrogen calcination.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Electrochemistry
Leyla Gidi, Roxana Arce, Jose Ibarra, M. Isaacs, M. J. Aguirre, Galo Ramirez
Summary: The mixed electrocatalyst of MWCNT/IL demonstrated high electrocatalytic activity in hydrogen evolution reaction, along with good stability. Compared to other electrocatalysts, it showed a higher TON value and a close to 60% faradaic efficiency.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Akansha Goyal, Marc T. M. Koper
Summary: Increasing the alkali metal cation concentration enhances the activity of the hydrogen evolution reaction on gold electrodes, while increasing the electrolyte pH indirectly affects the reaction activity by tuning the near-surface cation concentration. However, too high near-surface cation concentration can lead to a decrease in the reaction activity due to surface blockage.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Xianhong Wu, Junhui Wang, Zhiyu Wang, Fu Sun, Yuzhao Liu, Kaifeng Wu, Xiangyu Meng, Jieshan Qiu
Summary: An efficient strategy is proposed to enhance the electrochemical activity of MXenes for electrocatalysis by utilizing their plasmonic response to electromagnetic waves, resulting in a significant thermoplasmonic effect that lowers the energy requirements and activation energy of the hydrogen evolution reaction. This approach also facilitates interfacial charge transfer and boosts the HER activity of various types of MXenes with improved kinetics and Faradaic efficiency across a wide pH range.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Jiaxin Zhang, Sisi Li, Xiaohan Liu, Haoquan Zheng, Wei Zhang, Rui Cao
Summary: Interface engineering is used to improve the activity of catalysts in electrocatalytic oxygen evolution reaction (OER). In this study, Co3O4 supported on β-Mo2C with different interfaces were investigated. The strong interaction between Co3O4 nanoparticles and β-Mo2C nanobelts led to a compact interface, which enhanced the conductivity and promoted the charge transfer process during OER. The surface loading of Co3O4 improved the hydrophilicity of the material, while β-Mo2C had the capability to dissociate H2O molecules. This study demonstrates an example of interface engineering in electrocatalytic OER.
Article
Engineering, Environmental
Zhongyao Duan, Kai Deng, Chunjie Li, Mei Zhang, Ziqiang Wang, You Xu, Xiaonian Li, Liang Wang, Hongjing Wang
Summary: The study successfully fabricated a highly efficient non-Pt HER electrocatalyst mRh@PANI film, which exhibited superior activity and durability, achieving low overpotentials for high current densities in alkaline and neutral electrolytes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Lejie Tian, Hui Liu, Xiuwen Yi, Xinyi Wang, Lingyan Pang, Junqi Li
Summary: In this work, a nitrogen-doped porous carbon anchored Mo2C and CeO2 nanoparticles (Mo2C/CeO2/NC) catalyst for hydrogen evolution reaction (HER) was manufactured by utilizing electronic fuel injection (EFI) technology. The catalyst showed lower overpotential and smaller Tafel slope value, and exhibited excellent electrochemical stability. The Mo2C/CeO2/NC catalyst exhibited excellent HER catalytic performance and superior durability, which was attributed to the synergetic effects between Mo2C, CeO2 and nitrogen-doped porous carbon. This work is expected to promote the development of nonmetal-doped carbon-supported nanoparticle-based catalysts in the field of electrochemistry.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Jiajie Li, Shanbao Zou, Jinzhen Huang, Xiaoqian Wu, Yue Lu, Xundao Liu, Bo Song, Dehua Dong
Summary: Low-cost and efficient Mn-N-P doped carbon spheres were successfully developed as oxygen reduction reaction electrocatalysts, exhibiting high specific capacity and cycle stability for application in Zn-air batteries.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jing Wang, Jing Hu, Siqi Niu, Siwei Li, Yunchen Du, Ping Xu
Summary: This article reports an efficient bifunctional electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solution. The catalyst exhibits good performance at both low and overpotentials, and demonstrates outstanding long-term durability. Spectroscopic studies reveal the importance of in situ surface reconstruction for the enhanced catalytic activity in both HER and OER processes.
Article
Chemistry, Multidisciplinary
Xiaofeng Li, Ran Wang, Qing Wu, Yonghao Yu, Tangling Gao, Tai Yao, Xianjie Wang, Jiecai Han, Bo Song
Summary: In this study, a MoO2/MoS2/C material with dual heterogeneous interfaces is designed to enhance electrochemical performance for LIBs and SIBs. The combination of MoO2/MoS2 and carbon foam provides improved structural stability and electronic transport. The results show significantly enhanced electrochemical performance for both SIBs and LIBs.
Review
Electrochemistry
Daxing Hua, Jinzhen Huang, Emiliana Fabbri, Moniba Rafique, Bo Song
Summary: Water electrolysis technologies, especially anion exchange membrane water electrolysis, have played a significant role in hydrogen production from renewable energy. This review summarizes the recent achievements in anion exchange membrane water electrolysis, including improvements in conductivity and understanding of degradation mechanisms, as well as hot topics in electrocatalyst design. The review also discusses key factors affecting performance, challenges, opportunities, and future expectations for the development of anion exchange membrane water electrolysis devices.
Article
Chemistry, Physical
Jie Wu, Xuetao Qin, Yu Xia, Yuanyuan Zhang, Bin Zhang, Yunchen Du, Hsing-Lin Wang, Siwei Li, Ping Xu
Summary: This study demonstrates an effective strategy for reducing the surface oxidation of CoS2 and improving its catalytic performance for hydrogen evolution by introducing glued V2O5 nanoclusters.
NANOSCALE HORIZONS
(2023)
Article
Chemistry, Physical
Xiaoyu Chen, Zhi Han, Zonghao Lu, Tingting Qu, Ce Liang, Yu Wang, Bin Zhang, Xijiang Han, Ping Xu
Summary: Novel 2D-2D SnS2/CdS heterostructures are demonstrated by loading SnS2 nanosheets onto CdS nanosheets, exhibiting excellent photocatalytic hydrogen evolution activity under visible light. The highest hydrogen evolution rate is achieved on SnS2/CdS heterostructures with 35 wt% SnS2, which is approximately 6-fold higher than that of pure CdS NSs.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Engineering, Environmental
Shu-Chao Sun, Fei-Xiang Ma, Hao Jiang, Meng-Xin Chen, Ping Xu, Liang Zhen, Bo Song, Cheng-Yan Xu
Summary: Dual-phase WC-W2C nanocrystals embedded into hollow carbon dodecahedrons (WC-W2C/HCDs) exhibit competitive HER activities and durability in a wide pH range.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Physics, Applied
JiaJun Wang, YongZheng Zhu, Li Li, ManFu Wang, Shuang Zheng, Yan Cui, ShiMin Liu, ZhiHua Zhang, Ming He, Bo Song, Mei Zhao
Summary: The structural parameters, magnetic property, and electronic structure of K0.875+aFe1.5+bSe2 were investigated using first principles calculations. The magnetic property and electronic structure of K0.875Fe1.5Se2 evolve with increasing K or Fe content. Additional K causes a slight rigid shift of minority states, while additional Fe disrupts the vacancy order of Fe atoms, forming 1D chains, and induces obvious nesting features in the Fermi surfaces. K0.875Fe1.5Se2 is shown to be a semiconductor with a 61 meV gap, and the transition from semiconductor to superconducting phase is mainly attributed to the suppression of rhombus iron vacancy order and antiferromagnetic order with increasing Fe content.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ranran Liang, Bin Zhang, Yunchen Du, Xijiang Han, Siwei Li, Ping Xu
Summary: A series of Co(OH)(x)(A)(y) materials with different acidic anions were synthesized and their catalytic activity for the OER was determined. Surface oxidation and the content of highly active Co(IV) were found to be crucial parameters for the OER performance. Furthermore, the leaching ability of anions in Co(OH)(x)(A)(y) was directly related to the Co(IV) content and the catalytic activity, which can be summarized as an anion leaching-metal oxidation model. This study provides deep insights into the anion effect of metal basic salt-based OER catalysts and the activation process of pre-catalysts for the OER.
Review
Chemistry, Physical
Yuanyuan Zhang, Jie Wu, Bingrong Guo, Haohao Huo, Siqi Niu, Siwei Li, Ping Xu
Summary: Transition-metal metaphosphates (TMMPs) have been recognized as highly efficient catalysts for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in water splitting. This review summarizes the recent advances in the synthesis and applications of TMMPs, discusses the strategies for improving their catalytic activity, and explores the future opportunities and challenges in the field of electrocatalysis.
Article
Chemistry, Physical
Jianying Zhao, Yuanyuan Zhang, Yu Xia, Bin Zhang, Yunchen Du, Bo Song, Hsing-Lin Wang, Siwei Li, Ping Xu
Summary: In this study, a novel strong phosphide-metaphosphate interaction (SPmPI) was discovered in the RuP/CoNiP4O12 catalyst for efficient electrocatalytic overall water splitting. The SPmPI facilitates electron transfer and coordination environment, enabling the catalyst to achieve a low overpotential of 27 mV for hydrogen evolution reaction (HER) and effective oxygen evolution reaction (OER) for overall water splitting.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Ce Liang, Kexin Sun, Mengxin Chen, Ping Xu
Summary: This perspective introduces the promising role of two-dimensional transition-metal dichalcogenides (TMDs) in surface-enhanced Raman scattering (SERS) and discusses their fundamental properties, crystal-phase configurations, and phase transition strategies. It emphasizes the importance of crystal phase in determining the SERS effect of TMDs and highlights recent advances in phase-engineering approaches for remarkable SERS performance. By addressing current challenges and future directions in improving the crystal-phase engineering of TMDs in SERS, new insights are provided for the design and synthesis of more promising TMD-based SERS substrates.
Article
Nanoscience & Nanotechnology
L. X. Jiao, Z. Q. Li, Y. Z. Zhu, Z. Wei, Y. Liang, X. L. Wang, Y. Cui, Z. H. Zhang, M. He, Bo Song
Summary: Lithium iron phosphate (LiFePO4) has attracted much attention as an electrode material for lithium-ion batteries due to its advantageous characteristics. However, the crystal structure of LiFePO4 limits electron conduction and lithium ion diffusion, resulting in low conductivity. This study investigates the effects of doping S, Co, and Mn on the electronic structure and diffusion mechanism of LiFePO4. The results show that co-doping of S, Co, and Mn can significantly enhance the conductivity and diffusion rate of lithium ions in LiFePO4, providing valuable insights for improving its electrochemical performance.
Article
Chemistry, Applied
Mengxin Chen, Yuanyuan Zhang, Ran Wang, Bin Zhang, Bo Song, Yanchao Guan, Siwei Li, Ping Xu
Summary: Surface reconstruction of NiS2, NiSe2, and Se-NiS2 during the OER process is studied through in-situ Raman spectroscopy and ex-situ X-ray photoelectron spectroscopy. Se-NiS2 exhibits outstanding OER activity and stability in alkaline conditions, requiring an overpotential of 343 mV at a current density of 50 mA cm-2. The research provides a novel insight into the surface reconstruction and electrocatalytic mechanism of Ni-based chalcogenides.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Physics, Applied
Junbei Hu, Xianjie Wang, Lingli Zhang, Lingling Tao, Yu Sui, V. I. Belotelov, X. F. Han, Bo Song
Summary: This paper reports a high-performance solar-blind photodetector using PrxSm1-xNiO3/Nb:SrTiO3 heterojunctions and employing a lateral photovoltaic effect. A high position sensitivity of up to 879.4mV/mm and a fast relaxation time of 0.6 μs were observed under 3 Suns of 266nm laser irradiation. The lateral photovoltaic effect was well explained by the transverse diffusion model of photogenerated carriers. Furthermore, an optical communication system transmission was achieved from the heterojunction. The fast relaxation time and high position sensitivity make rare-earth nickelates a promising candidate for a self-powered high-performance solar-blind detector.
APPLIED PHYSICS LETTERS
(2023)
