Article
Chemistry, Inorganic & Nuclear
Luyu Zhu, Kai Song, Chenglin Yi
Summary: Bimetallic PdCu porous hollow nanoparticles (PHNs) with hierarchical nanostructures and well-alloyed compositions were synthesized through a one-pot aqueous synthetic route. These bimetallic PdCu PHNs exhibited multiple enhancement synergies in ethanol oxidation electrocatalysis, resulting in remarkable activity and stability. This study expedites the rational design and synthesis of high-hierarchy alloy electrocatalysts for fuel cell electrocatalysis.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Xiaomin Meng, Yirui Ouyang, Huijie Wu, Haowei Huang, Fengqian Wang, Shuo Wang, Mengchao Jiang, Lian Ying Zhang
Summary: By tuning the chemical composition and surface structure of electrodes, hierarchical palladium-silver alloy nanosheets with rich atomic defects were successfully prepared. These nanosheets exhibit much higher catalytic activity and stability compared to traditional catalysts, attributed to the optimized electronic structure of Pd, novel architecture, and rich atomic defects.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Fei Xiao, Yu-Cheng Wang, Zhi-Peng Wu, Guangyu Chen, Fei Yang, Shangqian Zhu, Kumar Siddharth, Zhijie Kong, Aolin Lu, Jin-Cheng Li, Chuan-Jian Zhong, Zhi-You Zhou, Minhua Shao
Summary: The article summarizes the current development status of PEMFCs and AMFCs, including electrocatalyst design, catalyst layer optimization, and cell performance. It discusses and compares the activity, stability, and fuel cell performance of different types of electrocatalysts for the oxygen reduction and hydrogen oxidation reactions, while also exploring research directions for further development.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Bei Fu, Likang Yang, Luyao Xu, Qingqing Yang, Yaying Zheng, Tianrong Zhan, Peizhi Guo
Summary: In this study, PdSn nanoparticles (NPs) were successfully synthesized with different molar ratios of Pd/Sn using a simple one-step method. The alloyed PdSn NPs showed higher electrocatalytic activity and better stability compared to commercial Pd/C for ethanol oxidation reaction (EOR). Especially, PdSn@NP-2 exhibited the best electrocatalytic performance, with a current density for EOR in the alkaline condition reaching up to 2463.8 mA mg(-1), approximately 3.6 times higher than commercial Pd/C (700 mA mg(-1)). Additionally, increasing temperature and concentrations of KOH/C2H5OH positively influenced the current density of the PdSn NPs samples, as observed through electrochemical measurements.
Article
Chemistry, Multidisciplinary
Ya Yan, Jun-Ye Zhang, Xue-Rong Shi, Yuting Zhu, Chenfeng Xia, Shahid Zaman, Xun Hu, Xianying Wang, Bao Yu Xia
Summary: This study introduces an efficient trifunctional electrocatalyst based on zeolitic-imidazole frameworks for hydrazine oxidation, oxygen, and hydrogen peroxide reduction. The electrocatalyst exhibits outstanding performance and presents a novel diffusion philosophy for liquid electrochemical cells.
Article
Chemistry, Multidisciplinary
Hongsen Wang, Hector D. Abrun
Summary: This study investigated the electrooxidation process of ethanol on platinum electrodes using spectroscopy and isotopic labeling. It was discovered that the intermediate species produced during ethanol oxidation can degrade the surface of the platinum electrode, reducing its performance. These new mechanistic insights will facilitate the design of higher-performing and more durable electrocatalysts for direct ethanol fuel cells.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Leigang Li, Shangheng Liu, Changhong Zhan, Yan Wen, Zhefei Sun, Jiajia Han, Ting-Shan Chan, Qiaobao Zhang, Zhiwei Hu, Xiaoqing Huang
Summary: In this work, a unique class of Mo-modified Ru nanosheet assemblies (Mo-Ru NSAs) has been successfully prepared, and their exceptional performance in HER/HOR reaction is revealed through structural optimization and DFT calculations. This study provides insights into the construction of more advanced bifunctional catalysts via surface and lattice engineering.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Susmita Singh, Moupiya Ghosh, Mainak Bose, Sinthia Saha, Anushna Dutta
Summary: The composition and atomic structure of nanoalloy electrocatalysts are crucial for the ethanol oxidation reaction. This study explores the relationship between the composition, structure, and catalytic activity of PtRu electrocatalysts and proposes a new perspective for the development of C/PtRu electrocatalysts for direct ethanol fuel cells.
Article
Chemistry, Physical
Jinfa Chang, Guanzhi Wang, Cheng Li, Yaqi He, Yuanmin Zhu, Wei Zhang, Muhammad Sajid, Abdelkader Kara, Meng Gu, Yang Yang
Summary: A PtPd HEA catalyst with a PtPd-rich surface and super-low platinum group metals loading was developed, achieving a maximum power density of 0.72 W cm -2 and durable operation for 1,200 h in DEFCs. This work has important implications for the development of nanostructured alloys for renewable energy applications.
Review
Electrochemistry
Adewale K. Ipadeola, Kamel Eid, Augustus K. Lebechi, Aboubakr M. Abdullah, Kenneth I. Ozoemena
Summary: This mini-review evaluates the research related to PM-Pt-Ns electrocatalysts for ethanol oxidation reaction (EOR) and discusses the effects of preparation methods, morphologies, and compositions on the reaction activity, as well as the challenges for scalable fabrication of the electrocatalysts. The prospects for developing novel PM-Pt-Ns electrocatalysts are emphasized.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Qiaoli Chen, Hui Jin, Tianchun Cheng, Zhi Wang, Yaoyao Ren, Jinshu Tian, Yihan Zhu
Summary: Alloyed Pd-main group metal ultrathin nanowires were synthesized using a facile wet-chemical method. These alloys exhibited significant improvement in electrocatalytic activity and durability in proton-exchange membrane fuel cells, with optimal performance observed at a small amount of main group metal. The presence of main group metal enhanced the surface electronic structure and antioxidant activity of Pd, while preventing metal leaching.
Review
Chemistry, Physical
Chen Li, Ke Wang, Dong Xie
Summary: This review paper summarizes strategies to improve the efficiency of ethanol electrooxidation using Pt- or Pd-based electro-catalysts, including chemical doping, alloying with other metals, mixing with metal oxides, and morphology control. The ultimate goal is to design high performance electrocatalysts to promote the commercialization of direct ethanol fuel cells.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Meiling Wang, Jin Zhao, Jinjin Wang, Yuzhu Tian, Zhizhu Yue, Li Wan, Dong Li, Tianjun Hu, Jianfeng Jia
Summary: In this study, a WO3 decorated Pd/C nanocomposite was prepared using a simple microwave irradiation method. The electrochemical tests showed that the Pd-WO3/C composite exhibited better electrocatalytic performance for ethanol oxidation compared to the commercial Pd/C catalyst. The stronger electronic coupling between Pd and WO3 and the modification of electron density on the Pd surface were identified as the reasons for the enhanced performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Meng Chen, Yingnan Duan, Fang Chen, Wei Zheng, Wanliang Yang, Mengkui Tian
Summary: In this study, Pd-supported black phosphorus-graphene (Pd/BP-G) catalysts are synthesized and their electrocatalytic performances in the oxidation of ethanol in alkaline media are explored. The results show that BP combines with activated graphene to form heterojunctions. Pd/BP-G catalysts exhibit enhanced electro-catalytic activity and have great potential for applications in direct ethanol fuel cells.
Article
Energy & Fuels
Meng Chen, Yingnan Duan, Fang Chen, Wei Zheng, Wanliang Yang, Mengkui Tian
Summary: In this study, Pd-supported black phosphorus-graphene (Pd/BP-G) catalysts were prepared and their electrocatalytic performances in the electrooxidation of ethanol in alkaline media were explored. The results showed that BP is combined with activated graphene to form heterojunctions, and Pd nanoparticles are evenly anchored on the BP-G hybrid. Pd/BP-G exhibited enhanced electrocatalytic activity for ethanol oxidation, with significantly higher surface area and mass activity compared to commercial Pd/C.
Article
Chemistry, Applied
Yong Wang, Feng Cao, Yunlei Fu, Hanchu Chen, Yuxiang Zhang, Chuanqi Wang, Yanyan Li, Hui Wang
Summary: Poly(acrylonitrile-co-butadiene) nanoparticles were synthesized by semibatch microemulsion polymerization. The microstructure of the polymers was characterized by 1H NMR and FT-IR. The particle size of the nitrile butadiene rubber (NBR) latex could be well controlled by reaction temperature, surfactant concentration, and feeding time of monomer. The minimum particle size of 34.2 nm could be achieved by using the surfactant/ monomer mass fraction of 7.9 wt%. The latex can be directly catalyzed for hydrogenation using Wilkinson's catalyst (RhCl(PPh3)3) and second generation Grubbs catalyst (Grubbs II), respectively. The hydrogenated products (HNBR) with a degree of hydrogenation above 95 mol% were obtained. The fast rate of hydrogenation demonstrates the unique advantages of small particle size.
Article
Chemistry, Applied
Weichao Tong, Hanchu Chen, Yuxiang Zhang, Zhuo Zhang, Yunlei Fu, Haocheng Qi, Defang Zhou, Yanyan Li, Hui Wang
Summary: The study discovered a high-efficiency catalyst for direct hydrogenation of nitrile butadiene rubber (NBR) latex, which showed excellent performance in terms of high hydrogenation rate and low catalyst usage. By using this catalyst, a high hydrogenation conversion rate of NBR latex can be achieved without the need for organic solvents and cross-linking reactions.
Article
Chemistry, Multidisciplinary
Pengcheng Liu, Peng Xiao, Ming Lu, Hui Wang, Na Jin, Zifeng Lin
Summary: Ti3C2Tx MXene with -F, -Cl, and -Br terminations were synthesized, and their effects on lithium storage properties were studied. Ti3C2Brx MXene exhibited the highest lithium storage capacity of 189 mAh/g, followed by Ti3C2Clx with 138 mAh/g and Ti3C2Fx with 123 mAh/g. Theoretical calculations revealed that the adsorption formation energy of halogen atoms on Ti atoms followed the trend of Ti-F > Ti-Cl > Ti-Br, which correlated with the surface terminations on MXenes. The exposure of MXene to oxygen resulted in a competition between halogen and oxygen, and Ti3C2Brx MXene showed the highest Ti to O ratio and the lowest Ti to Br ratio, explaining its superior lithium storage capacity. This work provides insights into improving the lithium storage properties of MXene electrodes through surface chemistry regulation.
CHINESE CHEMICAL LETTERS
(2023)
Article
Engineering, Environmental
Ruili Gao, Kunpeng Wang, Fanghui Wang, Hui Wang, Xuyun Wang, Jianwei Ren, Rongfang Wang
Summary: In this study, an organic molecule of perylenequinone was anchored on the surface of carbon material through pi-pi interaction and applied as the cathode of lithium-sulfur batteries (LSBs). The pi-pi interaction overcame the solvation effect of the organic molecule in organic electrolytes, providing stable existence in the long-cycle process of LSBs. The interaction mechanism between the organic molecule and lithium in the cathode was revealed, and the prepared electrode exhibited good cycling stability with high capacity retention.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Hongjing Tian, Yixing Che, Shengnan Xu, Jixing Tang, Hui Wang, Man Wu, Qingjie Guo
Summary: The catalysts using cobalt ferrite (CoxFe(3-x)O(4)) and sphere mesoporous silica (MCM-41) nanoparticles as support were found to enhance the oxidation rate of MgSO3 under moderate temperatures. The combination of electric field and CoFe2O4/MCM-41 showed a synergistic effect, significantly increasing the oxidation rate of MgSO3 compared to when only one factor was present. The study also revealed the mechanism of the catalytic oxidation of MgSO3, involving the reduction of oxidation potential and increased electron transfer rate.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Liping Wang, Yanyan Li, Hanchu Chen, Ying Zuo, Hui Wang, Jixiang Xu, Haijiao Xie, Haifeng Lin, Lei Wang
Summary: In this study, ZnS-CdS-CoSx porous Reuleaux triangle nanosheets with intimate Z-scheme hetero-interface and S, Zn vacancies were successfully synthesized. This unique structure exhibited desirable features for visible-light photocatalytic H2 evolution, including superior charge-separating capability, excellent light-harvesting capacity, abundant active sites, large surface area, and good stability. The ZnS-CdS-CoSx heterojunction demonstrated outstanding visible-light-driven H2-evolving activity, surpassing that of Pt-loaded CdS and many CdS-based photocatalysts reported in the literature. This research sheds new light on the design and synthesis of high-performance semiconductor heterojunction for sustainable solar utilization and environmental remediation.
Article
Polymer Science
Junjie Liu, Mingqi Jia, Fei Yuan, Zitong Hong, Weichao Tong, Chengzhuo Zheng, Chuanqi Wang, Hui Wang
Summary: Hydrogenated nitrile butadiene rubber (HNBR) is a high-performance elastomer widely used in the petrochemical and automotive industries. A ruthenium-based catalyst, M41, was investigated for the direct hydrogenation of NBR latex. The catalytic selectivity for the hydrogenation of -C=C bond instead of -C=N group was confirmed, and the reaction conditions were optimized to obtain high conversion of over 95 mol%. The results suggest that this catalyst could address the limitations in the hydrogenation of NBR latex.
POLYMER INTERNATIONAL
(2023)
Article
Chemistry, Physical
Feng Hu, Deshuang Yu, Wen-Jing Zeng, Zih-Yi Lin, Silin Han, Yajie Sun, Hui Wang, Jianwei Ren, Sung-Fu Hung, Linlin Li, Shengjie Peng
Summary: Supported multiple-site MOFs were used as model catalysts to quantitatively study the composition-dependent OER performance. Ni MOFs with a Ni/Fe ratio of 1:2 on Fe metal substrate showed the highest intrinsic OER activity. Introducing a proper amount of Cu further enhanced the OER performance of Cu-doped NiFe MOFs, achieving an impressively low overpotential of 200 mV at 10 mA cm(-2). Spectroscopic analysis and theoretical study revealed that copper doping induced electron redistribution within the NiFe MOFs, optimizing the balance of OH/OOH adsorption and reducing the energy barrier for improved OER.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Applied
Ruili Gao, Qian Zhang, Hui Wang, Fanghui Wang, Jianwei Ren, Xuyun Wang, Xianguo Ma, Rongfang Wang
Summary: In this study, the combination of 2,5-dichloropyrazine (2,5-DCP) and Co-doped carbon (Co-N-C) flakes achieved the synergistic effect of covalent and chemical sulfur fixation, greatly enhancing the immobilization-conversion of polysulfides in lithium-sulfur batteries (LSBs). The nucleophilic substitution of 2,5-DCP with polysulfides formed C-S bonds, followed by the covalent N-Li bonds between N atoms in 2,5-DCP and polysulfides, leading to sulfur fixation as solid organosulfur. Additionally, the Co-N-C flakes served as the sulfur cathode to chemically anchor the polysulfides, improving the cycling stability of the LSBs.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Physical
Minhui Li, Xiao Xu, Hui Wang, Xuyun Wang, Xianguo Ma, Jianwei Ren, Rongfang Wang
Summary: Using polysulfide electrocatalysts can improve the durability of lithium-sulfur batteries by controlling the precipitation and dissolution of lithium sulfide. In this study, a FeCoP quantum dot-decorated nitrogen-doped carbon nanosheet composite was prepared as a sulfur host for lithium-sulfur batteries. The optimal sulfur host showed bidirectional catalytic effects, greatly enhancing sulfur reduction during discharge and Li2S oxidation during charging. The assembled batteries exhibited high capacity and excellent cycling performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Ruili Gao, Shan Ji, Fanghui Wang, Kunpeng Wang, Hui Wang, Xianguo Ma, Vladimir Linkov, Xuyun Wang, Rongfang Wang
Summary: In this study, perylenequinone was used to enhance polysulfide chemisorption and conversion on cobalt-containing Li-S battery cathodes. The newly prepared cathode material exhibited excellent rate and cycling performances.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Minghui Wang, Jianwei Ren, Hui Wang, Xuyun Wang, Rongfang Wang
Summary: Rational selection and tuning of catalytic components can lead to the development of low-cost and high-performance bifunctional electrocatalysts. In this study, CeO2 was composited with Fe/N-doped carbon foam to improve the electrocatalytic performance for the oxygen evolution reaction (OER). The excitation of oxygen vacancies in CeO2 accelerated the migration of oxygen species and enhanced the oxygen storage/release capacity of the catalyst. The size effect of CeO2 particles enabled the timely discharge of gas bubbles from the reaction system, improving the OER kinetics. The CeO2-Fe2N/NFC-2 catalyst exhibited good OER performance and ORR electrocatalytic activity.
Article
Chemistry, Inorganic & Nuclear
Guoxu Zhou, Denghe Gao, Yucheng Dong, Lan Wang, Hui Wang, Xuyun Wang, Vladimir Linkov, Rongfang Wang
Summary: In this study, Fe/Ni NWs/NF catalysts with abundant active surface sites were prepared by hydrothermal and electrochemical deposition. The synthesized electrode possessed a 3D layered heterostructure and crystalline-amorphous interfaces, containing amorphous Fe nanosheets, which demonstrated excellent activity in OER.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Qing Dong, Haoran Wang, Fangfang Liu, Jianwei Ren, Hui Wang, Xuyun Wang, Rongfang Wang
Summary: In this work, a Mott-Schottky Cu-NCs-Co-NCs/NPCF catalyst with a built-in electric field was prepared by anchoring Cu/Co bimetallic ensembles on three-dimensional nitrogen-doped porous carbon nanosheet frameworks. The optimized Cu-NCs-Co-NCs/NPCF catalyst exhibited a low Tafel slope and promising potential in the oxygen reduction electrocatalytic and oxygen evolution electrocatalytic reactions under alkaline conditions, with a high onset potential and improved reaction kinetics. Moreover, the nitrogen-doped carbon nanosheet framework with a hierarchical porous structure and high specific surface area accelerated mass transport.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Pharmacology & Pharmacy
Ranli Bao, Hui Wang, Ru Zhang, Yulan Yin, Xuelian Xu, Dandan Zhang
Summary: A novel gastric floating sustained-release pellet was developed and evaluated in this study. The drug-loaded effervescent inner-core was prepared using melt pelletization, and a retarding gas-entrapped film was coated using air-flow coating. The optimal inner-core formula was determined using response surface methodology (RSM) and central composite design (CCD). The final pellets exhibited ideal floatability and release characteristics, indicating that they have the potential to be a gastro-retentive delivery preparation.
LATIN AMERICAN JOURNAL OF PHARMACY
(2023)
