Article
Chemistry, Physical
Hua Yang, Zihao Zhou, Huijuan Yu, Hongli Wen, Runnong Yang, Shaomin Peng, Ming Sun, Lin Yu
Summary: Efficient and economic bifunctional electrocatalyst for water splitting to produce hydrogen is urgently required. Layered double hydroxides (LDHs) are effective for oxygen evolution reaction (OER) but show challenging hydrogen evolution reaction (HER) activity. A hydrothermal-treatment strategy enhances the HER and OER performance of NiCo-LDH by creating metal vacancies and forming Ni/Co(OH)2 phase, tuning electronic structure, and improving electrical conductivity. The resulting NiCo-LDH-OH catalyst exhibits significantly reduced overpotentials for both HER and OER, and demonstrates superior activity for overall water splitting with no decay after 20 hours. This work paves a new path for efficient LDHs-based HER/OER bifunctional catalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Energy & Fuels
Roghayeh Habibi, Mehdi Mehrpooya, Mohammadreza Ganjali
Summary: This study proposes a novel composite material consisting of a three-metal layered double hydroxide and a carbon base derived from ZIF. Through physical and electrochemical tests, the synthesized nanomaterials exhibit excellent electrochemical performance in both oxygen reduction reaction and supercapacitor applications.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Environmental
Sung Ryul Choi, John-In Lee, Hyunyoung Park, Sung Won Lee, Dong Yeong Kim, Won Young An, Jung Hyun Kim, Jongsoon Kim, Hyun-Seok Cho, Jun-Young Park
Summary: A systematic study was conducted on Ruddlesden-Popper structured materials for their catalytic performance in oxygen evolution and reduction reactions, resulting in the development of highly efficient bifunctional oxygen catalysts La5Ni4O13-δ and La5Ni3CoO13-δ with outstanding electrocatalytic activity.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
L. Lu, Y. Zheng, R. Yang, A. Kakimov, X. Li
Summary: The development of bifunctional electrocatalysts based on LDHs for ORR/OER has gained increasing attention, offering new opportunities for expanding the application of LDHs in the field of energy storage and conversion. Various strategies to improve the performance of LDHs bifunctional electrocatalysts are discussed in detail.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Physical
Olga B. Belskaya, Roman M. Mironenko, Tatiana Gulyaeva, Mikhail Trenikhin, Ivan Muromtsev, Svetlana Trubina, Valentina V. Zvereva, Vladimir A. Likholobov
Summary: The changes in the properties and state of nickel in the synthesis of nickel catalysts using NiAl-layered double hydroxides were investigated. It was found that the use of NiAl LDH as the catalyst precursor allows for the obtaining of active dispersed nickel particles, and higher catalyst reduction temperature leads to increased catalyst activity and conversion rate.
Article
Engineering, Electrical & Electronic
Han Sun, Wenqing Zheng, Yu Zhang, Xinping Li, Wei Chen
Summary: Developing efficient and durable electrocatalysts for oxygen evolution reactions (OER) is crucial for improving the electrochemical performance of energy storage and conversion devices. In this study, FeCoNi-LDH nanomaterials were fabricated using a simple room-temperature stirring method, and they exhibited excellent electrochemical stability and activity due to their unique structure and composition.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
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, Physical
Jun -Jun Zhang, Meng-Yang Li, Wei-Wei Bao, Xiao-Hua Feng, Ge Liu, Chun-Ming Yang, Na Guo, Nan-Nan Zhang
Summary: The search for efficient self-supported nanoelectrodes for water-splitting process is important. A high-performance trimetallic Cr-NiZn layered double hydroxides electrocatalyst was synthesized, and doping was found to promote the reconstruction process and increase the number of defects.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Pooja Shandilya, Rohit Sharma, Raj Kumar Arya, Amit Kumar, Dai-Viet N. Vo, Gaurav Sharma
Summary: The global energy demand is steadily increasing and requires a reliable and sustainable source of energy. Hydrogen energy is emerging as one of the most promising alternatives, with a zero-carbon footprint. Layered double hydroxides (LDH) nanocomposites have attractive physicochemical properties and synergistic effect in the field of hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Qing Shi, Hantao Liu, Junfei Liang, Yaohui Zhang, Yaqian Dong, Weiyou Yang, Qiao Liu
Summary: In this work, a one-pot strategy was developed to fabricate NiFe layered double hydroxide nanosheets interconnected by carbon nanofibers, which exhibited enhanced oxygen evolution reaction (OER) catalytic activity and stability. The catalyst showed great potential for cost-efficient water splitting devices.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Pitchai Chandrasekaran, Thomas Nesakumar Jebakumar Immanuel Edison, Mathur Gopalakrishnan Sethuraman
Summary: This study successfully synthesized an inexpensive, efficient, and robust catalyst for the oxygen evolution reaction. The structure and performance of the catalyst were characterized using various methods, and it was found to have small overpotential and low resistance in alkaline medium, indicating good conductivity and electroactivity.
Article
Chemistry, Physical
Xiao Zhang, Feng Yan, Xinzhi Ma, Chunling Zhu, Yue Wang, Ying Xie, Shu-Lei Chou, Youju Huang, Yujin Chen
Summary: This study successfully prepared FeCoNi-LDHs with high activity and stability for the oxygen evolution reaction (OER) using a simple room-temperature-stirring strategy. The material features hollow structure and assembly of ultrathin layered nanosheets, showing significantly improved activity and stability compared to IrO2.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Shencheng Pan, Bing Li, Juan Yu, Lulu Zhao, Yongxing Zhang
Summary: The 2D ultrathin cobalt-manganese layered double hydroxides (CoMn-LDHs) nanosheets prepared by a specific reduction-oxidation method show excellent electrocatalytic performance for OER, attributed to their large surface area and unique layered structure.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Kun Jiang, Wenjun Liu, Wei Lai, Menglian Wang, Qian Li, Zhaolong Wang, Junjie Yuan, Yilin Deng, Jian Bao, Hongbing Ji
Summary: In this study, an advanced bifunctional electrocatalyst based on NiFe layered double hydroxide (LDH)/FeOOH heterostructure nanosheets was successfully synthesized via a simple electrodeposition method. The electrode demonstrated excellent electrocatalytic activity and stability, providing a valid strategy for designing a non-noble metal catalyst for seawater splitting. This work highlights the potential of the NiFe LDH/FeOOH heterostructure in facilitating active NiOOH species formation and enhancing overall alkaline simulated seawater splitting efficiency.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Tianyun Chen, Min Qian, Xianfeng Tong, Wenhao Liao, Yingyan Fu, Haojiang Dai, Qinghua Yang
Summary: Efficient non-noble metal bifunctional electrocatalysts are crucial for reducing energy consumption. Hierarchical nanostructures with an optimized electronic structure and increased active sites were successfully synthesized for Ni1.5Co1.5P catalyst, demonstrating low overpotentials and good durability. This study provides a feasible strategy for exploring and preparing low-cost non-noble metal bifunctional electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Niuwa Yang, Shaonan Tian, Yongjun Feng, Zhenya Hu, Hui Liu, Xinlong Tian, Lin Xu, Chaoquan Hu, Jun Yang
Summary: This work presents a thermal reduction method to introduce high-valence iridium (Ir) single atoms into bimetal phosphide (FeNiP) nanoparticles, which exhibit exceptional performance for oxygen evolution reaction (OER) and overall water splitting. The high-valence single Ir atoms (Ir4+) and their synergistic interaction with Ni3+ species, along with the disproportionation of Ni3+ assisted by Fe, contribute to the remarkable OER activity. The Ir-doped FeNiP nanoparticles with appropriate Ir/Ni and Fe/Ni ratios demonstrate low overpotential and high OER activity.
Review
Electrochemistry
Nicolas Alonso-Vante
Summary: This paper reviews the electrochemical properties of platinum-based nanoalloys, focusing on electrocatalytic materials generated via the carbonyl chemical route. The effects of segregation in these bimetals on the hydrogen oxidation and oxygen reduction reactions in the alkaline medium are investigated. The study reveals the importance of Pt adsorbate on the kinetics of HOR and ORR.
ELECTROCHEMICAL ENERGY REVIEWS
(2023)
Article
Chemistry, Physical
Huan Liu, Shao Jin, Kun Zhang, Yu Jiang, Yongjun Feng, Dianqing Li, Pinggui Tang
Summary: Hierarchical Ti-doped cobalt layered hydroxides were synthesized and sintered to prepare hierarchical Ti-doped Co3O4 miscrospheres. The incorporation of Ti into the lattice of Co3O4 resulted in smaller crystal sizes, higher specific surface area, and more oxygen defects. The Ti-doped Co3O4 miscrospheres exhibited high responses to toluene and xylene, showing promising applications in gas sensing.
APPLIED SURFACE SCIENCE
(2023)
Article
Electrochemistry
D. Mamedov, S. Zh. Karazhanov, N. Alonso-Vante
Summary: Nanoparticles of CeO2 with different morphologies were synthesized and compared with commercial ceria particles. The defectivity of CeO2 was found to influence its absorption edge energy and photocatalytic performance under narrow band UV-light condition. The surface charge condition of CeO2 particles played a crucial role in the decolorization of methylene blue dye, and the cubic-morphology CeO2 showed better performance despite its low BET surface area. However, the photopotential of ceria electrodes was lower than that of TiO2, resulting in a worse photocatalytic performance of CeO2 compared to TiO2.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Carlos A. Campos-Roldan, Raphael Chattot, Jean-Sebastien Filhol, Hazar Guesmi, Frederic Pailloux, Remi Bacabe, Pierre-Yves Blanchard, Andrea Zitolo, Jakub Drnec, Deborah J. Jones, Sara Cavaliere
Summary: This article describes the application of carbon-supported platinum-neodymium nanoalloys as oxygen reduction reaction (ORR) electrocatalysts. The unique structural dynamics of Pt-Nd nanoalloys in a simulated cathode environment of proton exchange membrane fuel cells (PEMFC) are revealed through extensive experimental and theoretical investigations. The findings suggest that the long-term ORR activity is mediated by surface compressive strain rather than charge transfer between Pt and Nd.
Article
Materials Science, Multidisciplinary
Xiangkun Zhang, Houmei You, Jinpeng Hou, Zhong Li, Yongjun Feng, Yanjun Lin, Xun Dai, Kewei Zhang, Weiliang Tian
Summary: This study developed a narrow-gap exfoliation approach using water as a green solvent to achieve efficient and scalable production of high-quality layered vermiculite (VMT) nanosheets. The narrow-gap exfoliation equipment was also used as a coupled separation reactor for in-situ preparation of VMT-stabilized poly (vinyl chloride) with superior thermal stability.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Siyu Jin, Hongyuan Xu, Yuhua Xie, Yanping Luo, Jing Li, Hui Xu, Hong Jin, Weiwei Cai
Summary: The CoFe nano particles covered in N-doped carbon layer were prepared by bimetallic-organic skeleton pyrolysis method and used as cathode matrix for Lithium-sulfur batteries (LSBs). The nitrogen-carbon shell layer and polar CoFe-alloy nanoparticles provide chemisorption sites for polysulfides and accelerate the redox conversion of polysulfides. The nitrogen-doped carbon layer promotes ion/electron transport and has a strong adsorption effect on polysulfides.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Houmei You, Jinpeng Hou, Yiwen Shen, Xiangkun Zhang, Jiaxue Cai, Yaya Zhang, Yongjun Feng, Weiliang Tian, Kewei Zhang
Summary: Solid-state light-emitting devices have advantages of low cost, high efficiency, and desirable durability. By structurally disassembling vermiculite into hydrotalcite and SiO2, high-performance fluorescent LDHs were prepared and assembled with VMT nanosheets to form ultrathin solid-state light-emitting films. The electrostatic self-assembly strategy allows precise control of chromophore localization and light-emitting intensity. This work provides a potential strategy for assembling solid-state light-emitting films and opens new applications in various optoelectronics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Shouli Bai, Shiyu Jia, Yingying Zhao, Pinggui Tang, Yongjun Feng, Ruixian Luo, Dianqing Li, Aifan Chen
Summary: Ti-doped α-Fe2O3 nanorods were used as a photoanode and were integrated with a NiFe-LDH catalyst through electrodeposition to improve the efficiency of solar PEC water splitting. The structure and properties of the electrode materials were characterized, and the PEC properties of the photoanodes were measured. The enhanced photocurrent density and IPCE value were attributed to the dual action of doping and catalysis, which led to the separation of photogenerated electron-hole pairs, an increase in carrier density, and an acceleration of carrier transfer rate.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Shouli Bai, Yanling Fang, Yingying Zhao, Yongjun Feng, Ruixian Luo, Dianqing Li, Aifan Chen
Summary: The novel ternary photoanode was prepared by modifying Bi nanoparticles on the type II heterojunction of WO3-ZnWO4 using drop casting and chemical impregnation methods. The photocurrent density of the ternary photoanode reached 3.0 mA/cm2 at 1.23 V (vs. RHE), which is 6 times higher than the WO3 photoanode. The incident photon-to-electron conversion efficiency (IPCE) at 380 nm wavelength increased by 2.8 times compared to the WO3 photoanode, thanks to the formation of a type II heterojunction and the modification of Bi NPs, resulting in enhanced light capture ability and improved carrier separation efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Computer Science, Information Systems
Yongjun Feng, Mingxia Li, Yongji Pei, Xinlei Huang, Hailong Wang, Panpan Li
Summary: This paper investigates the application effect of the improved Convolutional Neural Networks (CNN) algorithm in the Threat Assessment (TA) evaluation model, which addresses the weaknesses of the traditional model in considering only a single threat target and having poor accuracy. The proposed TA evaluation model uses the powerful feature extraction ability of CNN, adopts the concept of dual channel neuron, improves the structure of CNN, reduces network parameters, and obtains target classification features with multiple markers while retaining the full connection layer. The model utilizes fuzzy mathematics and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) to quantitatively describe the classification features of multi-marker targets, define feature weights, and evaluate the threat degree of multiple targets. Simulation results demonstrate that the model possesses fast convergence speed, accurate threat prediction ability, and the capability to accurately rank multiple targets by threat level.
MULTIMEDIA TOOLS AND APPLICATIONS
(2023)
Article
Chemistry, Physical
Carlos Campos-Roldan, Jean-Sebastien Filhol, Hazar Guesmi, Mickael Bigot, Raphael Chattot, Andrea Zitolo, Pierre-Yves Blanchard, Jacques Roziere, Deborah Jones, Sara Cavaliere
Summary: The evolution of Pt-Nd/C nanoalloys during electrochemical activation was studied, showing significant changes in their composition, morphology, and structure. Therefore, the stabilized properties should be considered when discussing the structure-activity-stability relationships of electrocatalysts.
Article
Chemistry, Applied
Jing Wang, Haihong Zhong, Jun Yang, Huiyu Li, Pinggui Tang, Yongjun Feng, Dianqing Li
Summary: Mn-Nx/C single-atom electrocatalysts have attracted much attention due to their non-precious nature, high abundance, and excellent electrocatalytic performance. However, the high overpotentials are the major challenge for these catalysts. In this study, we introduced Co as a second metal into the Mn-Nx/C system to create Co, Mn-Nx dual-metallic sites, which improved the catalytic activity and stability of the MnN4 active sites.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Review
Green & Sustainable Science & Technology
Yuan Wang, Haihong Zhong, Weiting Yang, Yongjun Feng, Nicolas Alonso-Vante
Summary: This review summarizes the recent advances in the production of hydrogen peroxide (H2O2) via two-electron (2e-) oxygen reduction reaction (ORR). It discusses the catalytic mechanisms, pH and porous structure effects, selectivity assessment methods, biomass-derived carbon-based catalyst development, and electrochemical device designs. The use of self-doped heteroatomic carbon-based electrocatalysts derived from abundant and cheap biomass has emerged as a promising and environmentally friendly approach for on-site H2O2 production.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2023)
Article
Chemistry, Physical
Carlos A. Campos-Roldan, Raphael Chattot, Frederic Pailloux, Andrea Zitolo, Jacques Roziere, Deborah J. Jones, Sara Cavaliere
Summary: This study systematically evaluated the hydrogen evolution/oxidation reactions on a series of Pt-rare earth nanoalloys in alkaline media, and identified the effect of the lanthanide contraction. The experimental results revealed that the chemical nature of the rare earth modulates the adsorption and mobility of oxygenated-species, enhancing the kinetics of the reactions.
JOURNAL OF MATERIALS CHEMISTRY A
(2024)
