Article
Chemistry, Multidisciplinary
Gregory L. Tate, Bahareh Alsadat Tavakoli Mehrabadi, Wen Xiong, Adam Kenvin, John R. Monnier
Summary: Controlled deposition of metals is crucial for the creation of bimetallic catalysts with predictable composition. Continuous co-electroless deposition allows for the creation of bimetallic catalysts with control over composition, as demonstrated in the study on Cu-Pt mixed-metal shell catalysts for methanol electrooxidation. The ability to control the composition of bimetallic shells can be extended to other systems where the ratio of two metals is critical for catalytic performance.
Article
Chemistry, Physical
Fengyuan Zhu, Jiangyan Xue, Lingjian Zeng, Jingrui Shang, Shuanglong Lu, Xueqin Cao, Brendan F. Abrahams, Hongwei Gu, Jianping Lang
Summary: In this study, ruthenium (Ru)-based nanoclusters were prepared in a carbon matrix using a one-pot pyrolysis reaction, leading to efficient catalysts with high activity for hydrogen/oxygen evolution reactions. The catalyst showed ultralow overpotentials for HER and OER, and when applied to overall water splitting, the Ru/RuOX nanoclusters exhibited exceptional performance at low cell voltages.
Article
Chemistry, Physical
Jingyi Yang, Jingcai Zhang, Qike Jiang, Yang Su, Yitao Cui, Xianquan Li, Shengxin Zhang, Weizhen Li, Botao Qiao
Summary: The study demonstrates that using single-atom catalysts (SACs) prepared by the atom trapping method as seeds, combined with supported nanoclusters or nanoparticles, can significantly improve the activity and stability of catalysts, providing a new avenue for the design and development of catalysts for industrial applications.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Engineering, Environmental
Jianfeng Tian, Kang Zhong, Xingwang Zhu, Jinman Yang, Zhao Mo, Jinyuan Liu, Jiachao Dai, Yuanbin She, Yanhua Song, Huaming Li, Hui Xu
Summary: The selectivity and activity of photocatalytic CO2 reduction can be effectively enhanced by modulating the reduction pathway of CO2 molecules and promoting the separation of photogenerated charges. Au nanoclusters (Au NCs) modified BiOBr nanosheets catalyst with highly exposed Au active sites showed excellent photocatalytic activity and nearly double increase in the rate of CO emission.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Mohamed M. Elnagar, Johannes Liessem, Changbin Im, Dariusz Mitoraj, Ludwig A. Kibler, Christof Neumann, Andrey Turchanin, Robert Leiter, Ute Kaiser, Timo Jacob, Igor Krivtsov, Radim Beranek
Summary: This study presents a novel type of stabilizers based on water-soluble ionic polymeric carbon nitride (K,Na-PHI) that effectively stabilizes highly catalytically active ultrafine gold nanoparticles (Au NPs). Experimental and theoretical studies reveal that the presence of functionalized heptazine moieties is crucial for the synthesis and stabilization of small Au NPs. The K,Na-PHI-stabilized Au NPs exhibit remarkable dispersibility and outstanding stability even in high ionic strength solutions.
Article
Chemistry, Multidisciplinary
Yuki Saito, Taisei Senzaki, Ken Nishizawa, Shu Kobayashi
Summary: We present a green synthetic method, continuous-flow N-methylation, utilizing heterogeneous Pd catalysts with formaldehyde and H(2) to access N-methyl amines. The catalyst shows excellent activity for aliphatic and aromatic amines, and the developed method is also applied to sequential hydrogenation reactions for challenging N-monomethyl amines.
Article
Chemistry, Multidisciplinary
Yuki Saito, Taisei Senzaki, Ken Nishizawa, Shu Kobayashi
Summary: This study presents a green synthetic method using heterogeneous Pd catalysts for continuous-flow N-methylation with formaldehyde and H(2) to obtain N-methyl amines. The catalyst exhibited excellent activity for aliphatic and aromatic amines. The developed method was also applied to sequential hydrogenation reactions to access challenging N-monomethyl amines.
Article
Nanoscience & Nanotechnology
Lu Song, Jaewan Ahn, Dong-Ha Kim, Hamin Shin, Il-Doo Kim
Summary: In this study, hollow Pd-Sn alloy nanotubes with ultrafine grain sizes were successfully fabricated for highly sensitive hydrogen gas detection. The alloying of Pd with Sn effectively prevented degradation of sensing performance, and the highly porous structure with smaller nanograins offered more exposed active sites and higher gas accessibility to bulk materials. The resultant Pd-Sn NTs exhibited excellent sensitivity toward H2, with a outstanding achievement in achieving a detection limit of 0.0001% among state-of-the-art H2 sensors.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Lu Song, Jaewan Ahn, Dong-Ha Kim, Hamin Shin, Il-Doo Kim
Summary: This study successfully fabricated Pd-Sn alloy nanotubes with excellent sensitivity and stability, which can be used as an efficient room temperature H2 gas sensor.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Mengmeng Jin, Wei Liu, Jiaqiang Sun, Xinzhong Wang, Shusheng Zhang, Jun Luo, Xijun Liu
Summary: This study demonstrates an active and stable catalyst composed of highly dispersed Ag nanoclusters on N-doped hollow carbon spheres, which can effectively reduce O-2 molecules into H2O2 with high selectivity and durability in acidic media.
Article
Computer Science, Information Systems
Jason J. R. Liu, Maoqi Zhang, James Lam, Baozhu Du, Ka-Wai Kwok
Summary: This article aims to design proportional-derivative (PD) controllers for interval positive linear systems in the continuous-time domain, ensuring both closed-loop system stability and positivity. The work proposes a systematic framework and presents methodology and algorithm, which are validated by numerical examples.
INFORMATION SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Mahdi Hesari, Zhifeng Ding
Summary: The structures of two Au-21(SR)(15) nanocluster isomers determine their chemical reactivity, showing unprecedented ECL efficiencies. The relationships were explored using ECL and photoluminescence spectroscopy, elucidating photoelectrochemical reactivity and ECL mechanisms.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Vladimir Burilov, Diana Mironova, Elsa Sultanova, Ramila Garipova, Vladimir Evtugyn, Svetlana Solovieva, Igor Antipin
Summary: In this study, a new polymeric NHC carrier was synthesized and its structure was confirmed through copper-catalyzed click polymerization. Pd nanoclusters supported on the polymeric surface exhibited high catalytic activity in the model reduction of p-nitrophenol, with the ability to be recycled for multiple cycles.
Article
Chemistry, Multidisciplinary
Xinxin Hang, Shentang Wang, Huan Pang, Qiang Xu
Summary: The size-controlled synthesis of gold nanoparticles using CIAC-108 as a host or stabilizer resulted in smaller nanoparticles with superior catalytic capabilities. The cage-embedded gold nanoparticles showed enhanced catalytic activities and remarkable stability compared to their larger counterparts.
Article
Chemistry, Multidisciplinary
Xin Zhou, Zhaozhan Wang, Bo Yu, Shaoping Kuang, Wei Sun, Yong Yang
Summary: This study presents a highly efficient method for synthesizing amides using a soluble heterogeneous Pd catalyst, which enables the hydroaminocarbonylation of alkenes and alkynes with amines and CO gas. The new method provides high yields and a broad substrate scope, as well as excellent stability and reusability of the catalyst.
Article
Chemistry, Physical
Jun Wang, Si-Dong Zhang, Si-Jie Guo, Si-Qi Lu, Yan-Song Xu, Jin-Yang Li, An -Min Cao, Li-Jun Wan
Summary: A surface coating strategy using manganese oxide nanoshell to protect the 4.5 V LCO cathode has been developed, resulting in improved stability and cycling performance.
Article
Chemistry, Physical
Lili Fan, Xiaofei Wei, Xuting Li, Zhanning Liu, Mengfei Li, Shuo Liu, Zixi Kang, Fangna Dai, Xiaoqing Lu, Daofeng Sun
Summary: This study reports a phosphorus-doped catalyst FeNPC with penta-coordinated single atom sites for efficient oxygen reduction reaction (ORR). The electronic distribution and adsorption strength of Fe-N-4 can be adjusted, reducing the reaction free energy of the potential-limiting step. Electrochemical tests show that FeNPC exhibits remarkable ORR activity and stability in alkaline, neutral, and acidic media.
Article
Plant Sciences
Xianming Zhou, Haiyan Zhang, Zhaoqi Xie, Ying Liu, Pengfei Wang, Lihong Dai, Xiaohui Zhang, Zhaoyang Wang, Zhuanrong Wang, Lili Wan, Guangsheng Yang, Dengfeng Hong
Summary: This study revealed the core function of BnaC2.MYB28 in regulating seed glucosinolate content in rapeseed and proposed a promising strategy for manipulating it.
Article
Mathematics, Applied
Lili Fan, Ruonan Liu, Hongjun Gao
Summary: This study examines a Hamiltonian model for the propagation of internal water waves interacting with surface waves, a current, and an uneven bottom. By using the Dirichlet-Neumann operators, the water wave system is expressed in Hamiltonian form, allowing for the determination of the motions of internal and surface waves. Through appropriate scaling of variables and the Hamiltonian perturbation theory, a KdV-type equation with variable coefficients dependent on bottom topography is derived to describe the internal waves.
PHYSICA D-NONLINEAR PHENOMENA
(2023)
Article
Energy & Fuels
Mostafa Othman, Tian Zhang, David P. McMeekin, Sebastian O. Fuerer, Wenxin Mao, Weilun Li, Andrew D. Scully, Anthony S. R. Chesman, Philip N. H. Nakashima, Udo Bach, Joanne Etheridge
Summary: The use of guanidinium iodide (GAI) cation as an interface engineering technique in perovskite solar cells improves stability by passivating defects on surfaces and grain boundaries. However, the relationship between structural and photophysical properties is not well understood. This study demonstrates that an optimal concentration of GAI can eliminate excess PbI2, improve crystallinity, and increase grain size. Higher concentrations induce the formation of new phases and reduce crystallinity and grain size. GAI treatment also helps remove microscale heterogeneities, resulting in optimum device performance.
Article
Chemistry, Physical
Sebastian O. Furer, Kevin J. Rietwyk, Federico Pulvirenti, David P. McMeekin, Maciej Adam Surmiak, Sonia R. Raga, Wenxin Mao, Xiongfeng Lin, Yvonne Hora, Jian Wang, Yangwei Shi, Stephen Barlow, David S. Ginger, Seth R. Marder, Udo Bach
Summary: ETL-free perovskite solar cells (PSCs) have potential for commercialization due to their simple design and fabrication. However, the interface between indium doped tin oxide (ITO) and perovskite is not optimal. Surface modification of ITO using self-assembled monolayers (SAMs) has shown improvement in device performance, but stability is often overlooked. This study introduces naphthalene-imide SAMs and examines their impact on the thermal stability of triple-cation PSCs, finding that they improve stability and power output.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yu-Qi Wang, Xiao-Han Dan, Zhen-Yu Yi, Xiang Wang, Ya-Chen Feng, Yue Feng, Dong Wang, Li-Jun Wan
Summary: This study investigates the O-2 adsorption and reduction on cobalt porphyrin (CoOEP) and phthalocyanine (CoPc) using in situ electrochemical scanning tunneling microscopy (ECSTM). Results show higher ORR activity of CoOEP compared to CoPc. Molecular-level imaging reveals that O-2 adsorbs mainly on Co-II sites and exhibits higher contrast in ECSTM images on CoOEP compared to CoPc. The dynamics of O-2 adsorption are quantitatively measured, with CoOEP exhibiting higher binding dynamics and lower Co-O dissociation barriers compared to CoPc.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Si-Qi Lu, Qinghua Zhang, Fanqi Meng, Ya-Ning Liu, Jianjun Mao, Sijie Guo, Mu-Yao Qi, Yan-Song Xu, Yan Qiao, Si-Dong Zhang, Kecheng Jiang, Lin Gu, Yang Xia, Shuguang Chen, GuanHua Chen, An-Min Cao, Li-Jun Wan
Summary: A method is presented to enhance the stability of nickel-rich layered oxides (NLOs) through surface solid reaction, improving cycling performance and reliability. La(OH)3 nanoshells are constructed to capture Li+ ions and react with the NLO surface lattices, transforming the particle crust into an epitaxial layer with localized Ni/Li disordering. This surface engineering results in improved capacity retention and excellent rate capability of NLOs for high-energy lithium-ion batteries.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Medicinal
Lili Fan, Xueying Zhang, Yihai Huang, Baobao Zhang, Wenjing Li, Qingru Shi, Yining Lin, Feihua Wu
Summary: In this study, it was found that Hom from Salvia plebeia R. Br. could protect vascular endothelial cells (VEC) from high glucose-induced injury by enhancing autophagy through the AMPK/mTORC1/TFEB pathway. These findings provide a potential therapeutic strategy for diabetic vascular complications.
PHYTOTHERAPY RESEARCH
(2023)
Article
Automation & Control Systems
Lili Fan, Dongpu Cao, Changxian Zeng, Bai Li, Yunjie Li, Fei-Yue Wang
Summary: In this research, a metaverse-enabled road maintenance system based on cyber-physical-social systems (CPSSs) is proposed, which fully utilizes the information of CPSS and the functions of road systems in the virtual world of the metaverse. An adaptive and information-preserving data augmentation (AIDA) algorithm-based crack detection algorithm is also proposed to enhance the detection performance of small targets in uncertain environments. The research can also be applied to the traffic metaverse by embedding a traffic flow prediction module in the algorithm. Experimental results show that the proposed algorithm outperforms other state-of-the-art algorithms in road damage detection tasks under different noise and weather conditions.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2023)
Article
Food Science & Technology
Lili Fan, Junjing Hu, Ziwu Guo, Shuanglin Chen, Qijiang He
Summary: This study assessed nutritional and flavor differences in two components, shoot flesh and diaphragm, of two Phyllostachys species and analyzed any positional variation. The results showed that shoot flesh contained higher levels of protein, starch, fat, and vitamin C. On the other hand, the diaphragm had comparable levels of total acid, oxalic acid, and tannin in both species. Our findings suggest that bamboo shoot quality is affected by flavor compound differences, and interspecific and shoot components interact.
Article
Chemistry, Physical
Xiang Wang, Zhen-Yu Yi, Yu-Qi Wang, Dong Wang, Li-Jun Wan
Summary: This study investigated the dynamic processes of methanol absorption and catalytic conversion on isolated single-atom Rh-N-4 sites using in situ electrochemical scanning tunneling microscopy. The results provided microscopic insights into the catalytic mechanism and reaction dynamics of methanol electrooxidation on Rh-N-4 sites, which is valuable for the rational design of high-performance catalysts.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Materials Science, Multidisciplinary
Ting-Ting Wu, Sijie Guo, Bing Li, Chang-Yu Shen, Xian-Hu Liu, An-Min Cao
Summary: All-solid-state batteries (ASSBs) show great potential for next-generation energy storage technologies, but the use of solid-state electrolytes (SSEs) brings concerns about the interface resistance and charge distribution. This review focuses on garnet-type SSEs and discusses their Li+ transmission mechanism. Challenges related to the Li/LLZO interface and strategies to combat contact issues are summarized, along with future research perspectives.
Article
Chemistry, Physical
Yu-Qi Wang, Xiao-Han Dan, Zhen-Yu Yi, Xiang Wang, Ya-Chen Feng, Yue Feng, Dong Wang, Li-Jun Wan
Summary: The in situ electrochemical scanning tunneling microscopy (ECSTM) study of O2 adsorption and reduction on cobalt porphyrin (CoOEP) and phthalocyanine (CoPc) is reported. CoOEP exhibits higher ORR activity than CoPc according to electrochemical measurements. Self-assembled CoOEP and CoPc monolayers on Au(111) substrates are observed at molecular resolution by ECSTM. O2 adsorbs on CoII sites and has high contrast in ECSTM images for both CoOEP-O2 and CoPc-O2 complexes. The surface coverage of CoOEP-O2 is approximately 1.4 times higher than that of CoPc-O2. The dynamics of O2 adsorption, quantitatively measured by potential step experiments, indicate higher dynamics and lower barriers for Co-O dissociation on CoOEP compared to CoPc.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Lili Fan, Xiaofei Wei, Xuting Li, Zhanning Liu, Mengfei Li, Shuo Liu, Zixi Kang, Fangna Dai, Xiaoqing Lu, Daofeng Sun
Summary: This study reports a phosphorus-doped Fe-N-C catalyst with penta-coordinated single atom sites for efficient oxygen reduction. The catalyst exhibits remarkable ORR activity and stability in alkaline, neutral, and acidic media.