Article
Chemistry, Physical
Xue-Wei Lu, Zhewei Li, Chen-Kai Yang, Weijia Mou, Liying Jiao
Summary: In this study, a vacuum thermal evaporation system was designed specifically for large-scale preparation of uniform MoS2 thin films. The obtained films showed potential applications in electronic devices and electrocatalysis, and could be patterned using shadow masks.
Article
Chemistry, Physical
Xiaoxiao Cheng, Yun Tong
Summary: In this study, a simple strategy was used to establish an effective synergy between CoP, Ni2P, and MoS2 nanosheets, resulting in a self-supporting electrode with abundant catalytic active sites and optimized electronic structure, leading to improved catalytic performance, especially under neutral conditions.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Li Gong, Xiao Mu, Qiang Li, Lei Ma, Yucong Xiong, Rong Li
Summary: An efficient electrocatalyst NC@Mo2C@MoS2-(Ni) was designed for the Hydrogen Evolution Reaction in water electrolysis, showing good catalytic performance in both acidic and basic media. This work not only fabricates a catalyst for hydrogen evolution, but also provides a method to design more efficient functional electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yang Li, Qinfen Gu, Bernt Johannessen, Zhi Zheng, Can Li, Yuting Luo, Zhiyuan Zhang, Qi Zhang, Haining Fan, Wenbin Luo, Bilu Liu, Shixue Dou, Huakun Liu
Summary: The study focuses on enhancing the HER performance of MoS2 through Pt doping and achieving partial phase conversion from 2H to 1T. It reveals the significance of Pt atom in electronic structure modulation of MoS2 and identifies the most active HER site in MoS2 as the S atom adjacent to Pt.
Article
Chemistry, Physical
Chenglong Wang, Mengle Yang, Xinming Wang, Huiyuan Ma, Yu Tian, Haijun Pang, Lichao Tan, Keqing Gao
Summary: This study successfully prepared an efficient non-precious bimetallic sulfide catalyst CoS2/MoS2 through a one-step method, which exhibits high yield, selectivity, and excellent stability in electrochemical nitrogen reduction reaction (NRR).
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yijuan Wang, Jianzhi Wang, Jie Liu, Zhuangwei Xiao, Yanan Xue, Faquan Yu
Summary: Through a one-step solvothermal process, few-layer and 1T-rich MoS2 was synthesized using a rigid segment-containing polysulfide as a concomitant sulfur source and in situ intercalator. The prepared MoS2 exhibited superior hydrogen evolution reaction activity, offering a facile and mild approach for the development of high performing MoS2 and other two-dimensional lamellar materials.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Shihao Wang, Longlu Wang, Lingbin Xie, Weiwei Zhao, Xia Liu, Zechao Zhuang, YanLing Zhuang, Jing Chen, Shujuan Liu, Qiang Zhao
Summary: Defect engineering is an effective strategy to optimize the catalytic performance of MoS2 by introducing dislocations. This study successfully synthesized numerous dislocation-strained structures in MoS2 nanosheets through low-temperature hydrothermal synthesis. The high-density dislocations and corresponding strain field resulted in superior catalytic activity under visible light. This work provides a new pathway for improving the catalytic activity of MoS2 through dislocation-strained synergistic modulation.
Article
Electrochemistry
Ran Sun, Xing Huang, Qiongyu Zhou, Mingjing Li, Jibo Jiang, Yulu Li, Wenxiu Xu, Haishan Cong, Sheng Han
Summary: Development of non-platinum based electrocatalysts is crucial for achieving hydrogen economy. In this study, a three-dimensional nanoflower heterostructure composite electrocatalyst was developed for alkaline hydrogen evolution reaction (HER). The catalyst exhibited outstanding electrocatalytic activity, requiring a low overpotential to achieve high current density in 1.0 M KOH solution, surpassing the performance of most reported non-noble-metal HER electrocatalysts.
ELECTROCHIMICA ACTA
(2022)
Review
Engineering, Environmental
Xian Zhang, Feifei Jia, Shaoxian Song
Summary: This review focuses on summarizing the structural engineering strategies for activating MoS2, including edge engineering and disorder engineering, and theoretical analyses are used to reveal the HER mechanism of MoS2. Additionally, the comprehensive summaries and outlook in developing MoS2 as earth-abundant HER electrocatalyst are discussed.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Gyawali Ghanashyam, Hae Kyung Jeong
Summary: In this study, flower-like nickel-doped molybdenum disulfide (Ni-MoS2) catalysts were synthesized via a hydrothermal method for electrocatalysis, exhibiting high catalytic activity and stability. The addition of nickel at a concentration of 11% led to an overpotential of -160 mV for the hydrogen evolution reaction at -10 mA/cm2 and 240 mV for the oxygen evolution reaction at +10 mA/cm2, with corresponding Tafel slopes of 79 and 102 mV/dec, respectively. The optimal bifunctional catalytic activities were attributed to the 11% nickel doping, which introduced a metallic 1 T phase, improved conductivity, and increased electrochemical surface area.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Zhiguo Du, Shuai Wang, Riming Hu, Di Zhang, Jianan Gu, Xiao Chen, Jiaxiang Shang, Bin Li, Shubin Yang, Lin Guo
Summary: By unlocking the catalytic activities of 2H phase molybdenum-based compounds through a topological conversion reaction from Mo2GeC MAX phase to accordion-like molybdenum phosphosulphide, the inert basal planes are optimized and water molecules are facilitated to be absorbed, resulting in high hydrogen production rates and ultralong durability for practical application in HER.
Article
Materials Science, Multidisciplinary
Da-Som Shin, Zhenyu Jin, Seokhee Shin, Suhyun Lee, Hyeri Choi, Yo-Sep Min
Summary: Changes in morphological structure do not affect the intrinsic activity of molybdenum sulfide catalysts.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Meiling Song, Songlin Deng, Yan Qing, Yao Huang, Sha Luo, Yu Liao, Cuihua Tian, Yiqiang Wu, Han Xu
Summary: Researchers proposed a gas-phase reaction approach based on the in-situ decomposition of hemicellulose and cellulose from natural wood to design highly active Mo2C nanoparticles that are tightly rooted into hierarchical N-doped carbonized wood. This approach can improve the reaction activity for hydrogen production and enable efficient hydrogen energy production.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Gyawali Ghanashyam, Hae Kyung Jeong
Summary: Research has shown that molybdenum disulfide-based catalysts have exceptional performance in the hydrogen evolution reaction (HER), but there has been minimal research on the oxygen evolution reaction (OER). In this study, flower-like molybdenum disulfide was synthesized using a hydrothermal method to enhance bifunctional HER and OER activity. The improved performance is attributed to the expanded electrochemical active surface area, which provides abundant exposed active sites and increases electrochemical conductivity. This research highlights a controllable one-step hydrothermal method for the synthesis and design of flower-like molybdenum disulfide, which is highly beneficial in clean and green energy conversion.
INORGANICA CHIMICA ACTA
(2022)
Article
Chemistry, Physical
Hyeonggeun Choi, Suok Lee, Min-Cheol Kim, Yeonsu Park, A-Rang Jang, Wook Ahn, Jung Inn Sohn, Jong Bae Park, John Hong, Young-Woo Lee
Summary: In this study, hierarchically ordinated two-dimensional MoS2 nanosheets on three-dimensional reduced graphene oxide aerogel were successfully designed as a new class of electrocatalysts for the hydrogen evolution reaction (HER). The unique 3D hierarchical structure provided large surface areas and more active sites, resulting in remarkable electrochemical properties during the HER.
Article
Materials Science, Characterization & Testing
Yulong Xu, Di Yang, Shaosen Huo, Junkai Ren, Ningxiao Gao, Zhiyuan Chen, Yong Liu, Zheng Xie, Shuyun Zhou, Xiaozhong Qu
Summary: Self-referenced photoluminescent oxygen sensitive fibrous membranes were successfully prepared for evaluating the freshness of agricultural products by monitoring the concentration change of environmental oxygen in packaged fruits. This study demonstrates the potential of using such membranes as an optical oxygen sensor for agricultural applications.
Article
Chemistry, Multidisciplinary
Junkai Ren, Luigi Stagi, Luca Malfatti, Sebastiano Garroni, Stefano Enzo, Plinio Innocenzi
Summary: This study successfully integrated hexagonal boron nitride (BN) nanosheets into titania mesoporous films using a template-assisted sol-gel synthesis and evaporation-induced self-assembly, and investigated the role of defects in heterostructure properties. It was found that defects enhance the photocatalytic response of the film.
Article
Chemistry, Multidisciplinary
Yiqun Ni, Zhixia Han, Junkai Ren, Zhen Wang, Wenfei Zhang, Zheng Xie, Yonghong Shao, Shuyun Zhou
Summary: By incorporating carbon dots (CDs) into ormosil gel hybrids as a solid matrix, a stable rigid structure with high PLQY and peak optical gain can be achieved, demonstrating the advantage of high transmittance in the visible/near infrared region.
Article
Chemistry, Physical
Yao Zhang, Haoran Guo, Junkai Ren, Xinpan Li, Wenlu Ren, Rui Song
Summary: This study presents a facile solvothermal strategy to fabricate a binder-free electrode of Fe-S-NiMoO4/MoO3 with nanorods array, which demonstrates that Fe-doping can improve the conductivity and modulate the crystal plane of MoO3. The electrode can stably yield a current density of 500 mA cm-2 at an overpotential of 271 mV under 50 degrees Celsius, meeting the requirements of industrial water electrolysis.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Nanoscience & Nanotechnology
Qian He, Junkai Ren, Yaodong Liu
Summary: In this study, tunable fluorescence across the entire visible range was achieved in carbon dots (CDs) synthesized by hydrothermal method with amino-rich surface by simply controlling the concentration. The effects of concentration-induced aggregation and electrostatic-induced agglomeration were compared for the first time in terms of their fluorescence properties. It was found that both the aggregation of CDs and internal absorption filtration can cause concentration-dependent fluorescence emission. Additionally, the inter distance of adjacent CDs in their aggregates was enlarged by forming rigid double-stranded DNA (dsDNA) between adjacent CDs through base pairing.
Article
Engineering, Environmental
Jiayang Zhao, Yao Zhang, Haoran Guo, Junkai Ren, Haotian Zhang, Yuhao Wu, Rui Song
Summary: In this study, a novel defect-rich electrocatalyst was fabricated using a combination of hydrothermal, annealing, and electrodeposition methods. The electrocatalyst exhibited high activity and stability in water-to-hydrogen conversion and urea electrolysis. This research provides a promising pathway for the design of efficient electrocatalysts in energy-saving water-to-hydrogen conversion.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Jiayang Zhao, Yao Zhang, Haoran Guo, Haotian Zhang, Junkai Ren, Rui Song
Summary: Rationally regulating the composition and structure of electrocatalysts is crucial in HER and OER. A new electrocatalyst of nickel phosphate microprism (VSB/NiPO) is developed with excellent HER activity. Modulating the crystallinity and electronic structure of the framework further improves the performance. The assembled electrolyzer achieves efficient and stable water splitting under low energy consumption.
Article
Chemistry, Multidisciplinary
Haotian Zhang, Haoran Guo, Yao Zhang, Jiayang Zhao, Yanyan Li, Xinpan Li, Junkai Ren, Rui Song
Summary: Efficient and robust bifunctional catalysts are crucial for overall water electrolysis. In this study, a multidimensional hierarchical architecture catalyst was constructed, showing excellent electrocatalytic performance for the hydrogen evolution reaction and oxygen evolution reaction in a water electrolysis device.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Junkai Ren, Luigi Stagi, Luca Malfatti, Valentina Paolucci, Carlo Cantalini, Sebastiano Garroni, Marzia Mureddu, Plinio Innocenzi
Summary: Researchers have fabricated WS2/TiO2 heterostructures by incorporating two-dimensional transition metal dichalcogenides layers into titania mesoporous ordered thin films, resulting in improved performances of photocatalytic devices. An enhanced photocatalytic response has been observed, attributed to the interparticle electron transfer effect.
Article
Chemistry, Physical
Junkai Ren, Luca Malfatti, Luigi Stagi, Davide Carboni, Roberto Anedda, Laura Calvillo, Plinio Innocenzi
Summary: Metal-free sulfur nanodots are a type of emerging nanoparticles used in photonics and nanobiotechnology. By modulating the surface interface with an organic polymer, the emission properties and colors of sulfur nanodots can be controlled.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Tianyu Chao, Jingjing Wang, Xuezhe Dong, Junkai Ren, Hailong Zhang, Rui Song, Zheng Xie
Summary: By designing carbon dots-silica hybrid materials, RTP emission with ultralong lifetime and high phosphorescent quantum yield is achieved, stemming from the synergistic strategy of abundant electron traps, highly rigid network, and stable covalent bond. This design provides a new approach for the development of carbon dots-based RTP materials, showing broad application prospects in various fields.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Review
Chemistry, Physical
Junkai Ren, Plinio Innocenzi
Summary: Hexagonal boron nitride (h-BN) is a highly attractive 2D material due to its remarkable properties, and its combination with other components to form heterostructures shows great potential for developing advanced functional devices. High-quality 2D h-BN structures with fewer defects can maximize its intrinsic properties, while controlled introduction of multiple defects in 2D h-BN can create new properties and advanced functions. Engineering of heterojunctions, including interface bonding design, plays a crucial role in developing advanced applications based on h-BN heterostructures in the future.
Article
Materials Science, Multidisciplinary
Di Yang, Jiwei Li, Junkai Ren, Qinglin Wang, Shuyun Zhou, Qiu Wang, Zheng Xie, Xiaozhong Qu
Summary: The dual-luminophore self-referenced pressure sensitive paint (PSP) prepared in this work is fully sprayable and transparent, capable of efficiently determining sudden changes of surface pressure with a time response of 1.3 ms. By calculating the intensity ratio of SiCDs to Ru-silane photoluminescence, a 2D pressure map can be quantified to improve measurement accuracy. The PSP coatings are expected to be a useful tool in remote pressure and oxygen sensing in various fields such as aircraft design and healthcare.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Review
Materials Science, Multidisciplinary
Junkai Ren, Luca Malfatti, Plinio Innocenzi
Summary: Carbon dots (CDs) are highly-emissive nanoparticles obtained through fast and cheap syntheses, with various origins for their luminescence mechanisms. Citric acid is a common precursor for CD preparation, and factors such as temperature, reaction time, and solvent choice play critical roles in synthesis control. The focus on CDs' optical properties, tunable emissions, and quantum yields, is essential for functional applications, while basic rules for fabricating highly luminescent nanoparticles can be derived from literature metanalysis.
C-JOURNAL OF CARBON RESEARCH
(2021)
Review
Materials Science, Multidisciplinary
Junkai Ren, Luigi Stagi, Plinio Innocenzi
Summary: This review summarizes the latest techniques for hydroxylating bulk and nanoscale BN materials, discussing different synthesis routes and possible research and development directions. The research indicates that employing various strategies for BN hydroxylation is an effective method to improve the performance of BN nanomaterials, facilitating enhanced solubility and production of high-quality nanocomposites.
JOURNAL OF MATERIALS SCIENCE
(2021)