Article
Chemistry, Physical
Lea Pasquale, Sharif Najafishirtari, Rosaria Brescia, Alice Scarpellini, Cansunur Demirci, Massimo Colombo, Liberato Manna
Summary: The study found that the effects of oxidation treatment on Pd-Cu and Pt-Cu bimetallic alloy nanocrystals were different, with Pt-Cu NCs undergoing complete dealloying while Pd-Cu NCs partially retained their alloy structure. Following the reducing treatment, Pd-Cu alloy NCs were largely restored while Pt-Cu NCs still contained a significant amount of oxide species.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
J. Maya-Cornejo, J. A. Diaz-Real, Jose Luis Lopez-Miranda, Lorena Alvarez-Contreras, Rodrigo Esparza, Noe Arjona, Miriam Estevez
Summary: In this study, Cu@Pd core-shell nanoparticles were synthesized by optimizing the reduction of Cu2+ to Cu-0 as cores and increasing the amount of Pd precursor. The Cu@Pd IV sample exhibited the best core@shell structure and highest electrocatalytic activity for ethanol oxidation reaction. This sample also showed a significantly lower oxidation peak potential and higher current density compared to the reference Pd/C nanomaterial.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Rajib Sarkar, Lisa S. Graves, Jessie R. Taylor, Indika U. Arachchige
Summary: A methodology for the direct self-supported assembly of Ag/Pt/Pd alloy nanoparticles into aerogels with high surface area, mesoporous structure, and conductivity is reported. The resulting alloy aerogels exhibit superior electrocatalytic activity and stability in methanol and ethanol oxidation reactions.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Applied
Di Liu, Zhejiaji Zhu, Jiani Li, Li -Wei Chen, Hui-Zi Huang, Xiao-Ting Jing, An -Xiang Yin
Summary: Researchers prepared Rh-Cu alloy nano-dendrites with abundant surface steps, which showed significantly enhanced activity and C1 selectivity compared to Rh nano-dendrites and commercially available Rh/C. Alloying with Cu modulated the surface electronic structures of Rh to resist CO-poisoning and strengthen ethanol adsorption. Optimizing the surface geometric and electronic structures of nanocrystals through rational composition and morphology control provides a promising strategy for developing practical direct ethanol fuel cell devices.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Kamal Kanti Bera, Anupam Chowdhury, Shyamal Kanti Bera, Mahima Ranjan Das, Atanu Roy, Sachindranath Das, Swapan Kumar Bhattacharya
Summary: A novel ternary heterojunction catalyst consisting of Pd-supported Bi2MoO6-Bi2O2CO3-CuO was developed for ethanol oxidation under visible light. The synthesized catalysts exhibited higher photo-electrocatalytic activity and stability compared to other catalysts.
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.
Article
Chemistry, Physical
Zi J. Zhao, Wan P. Li, Yen H. Chen, Xin Y. Liu, Tzu H. Chou, Xu Wang, J. C. Huang, Ming Wu
Summary: This study investigates the impact of thermal treatments on the fabrication process of nanoporous silver, revealing that high-temperature oxidation can tune the process and copper oxide may be a key factor influencing the mechanism. Furthermore, the research shows that under HTO pretreatment, the diffusion method of Ag atoms differs from the free corrosion pathway, leading to the formation of a larger 3D bicontinuous ligament/pore structure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Green & Sustainable Science & Technology
X. Tai, B. Wu, J. Bao, W. Qu, L. Zhao, Z. Wang
Summary: In this study, a facile synthetic strategy is presented to prepare bimetallic Pd-Cu alloy nanospheres (Pd-Cu ANSs) catalysts, and the formation mechanism of Pd-Cu ANSs is thoroughly investigated. The optimized Pd-Cu ANSs exhibit excellent catalytic performance for formic acid oxidation reaction (FAOR), providing a new pathway for the application of noble metal-based alloy nanomaterials.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Engineering, Environmental
Chenyang Lu, Shihong Zhou, Wenyu Zhou, Cailong Zhou, Qun Li, Aonan Zeng, Anjie Wang, Luxi Tan, Lichun Dong
Summary: A highly selective acetylene selective hydrogenation catalyst (Cu15Pd@C) was successfully prepared, which improves ethylene selectivity while maintaining high activity. The carbon layer promotes the formation of smaller nanoparticles and effectively inhibits the production of green oil associated with acetylene coupling. The same approach was applied to fabricate a series of carbon-confined Cu and Ag-based bimetal catalysts, demonstrating the universality and potential applications of the carbon layer in selective hydrogenation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
S. Irazoque, A. Lopez-Suarez, C. K. Zagal-Padilla, S. A. Gamboa
Summary: In this study, the electro-oxidation reaction of ethanol over Pd-Cu supported on Cu porphyrin (TPPCu) was investigated. The catalyst was synthesized using the microwave-assisted polyol method and characterized by various techniques. The results showed that the Pd-Cu/TPPCu catalyst exhibited high electroactive surface area and good electrochemical response, with improved tolerance to CO contamination. The catalyst also showed good response to variations in scan rate and ethanol concentration. This study provides valuable insights into the performance of Pd-Cu/TPPCu catalyst for ethanol electro-oxidation.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jagdish C. Bhangoji, Ulka B. Suryavanshi, Gurudas P. Mane, Gurmeet C. Wadhawa, Nagesh D. Pawar, Suresh S. Shendage
Summary: Uniform dispersion of Pd nanostructures supported on hydrothermally synthesized bimetal oxides on Ni foam substrate was achieved using an electrochemical approach. The resulting nanocomposite materials exhibit superior electro-catalytic performance for ethanol sensing applications.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Pingping Wu, Lei Song, Yue Wang, Xuehua Liu, Zhengke He, Peng Bai, Zifeng Yan
Summary: Enhancing benzaldehyde selectivity and improving oxygen transfer during the reaction can be achieved by generating more surface Lewis acid sites on ZrO2-modified alumina. The introduction of ZrO2 also enhances noble metal dispersion, leading to the formation of more active sites for improved catalytic activity.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Chang Liu, Yi Shen, Jinfeng Zhang, Gen Li, Xuerong Zheng, Xiaopeng Han, Lianyong Xu, Shuze Zhu, Yanan Chen, Yida Deng, Wenbin Hu
Summary: This study successfully synthesized metastable Pd nanoparticles with abundant twin boundaries and atomic steps using a solid-state thermal shock strategy. These nanoparticles exhibited excellent reactivity, stability, and CO tolerance in alkaline solutions for the ethanol oxidation reaction.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Nils Lau Nyborg Broge, Andreas Dueholm Bertelsen, Frederik Sondergaard-Pedersen, Bo Brummerstedt Iversen
Summary: High-entropy alloys (HEAs) are a promising class of materials with extraordinary properties and customization potential through stoichiometry changes. This study presents a solvothermal method for synthesizing eight-component Pt-Ir-Pd-Rh-Ru-Cu-Ni-Co nano-HEA nanoparticles, which can be produced in large quantities. The method relies on simple autoclaves and in situ X-ray scattering experiments suggest auto-catalyzed growth of the particles, extending understanding of HEA nanomaterials.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Baihe Hanqi, Juan Xu, Xingzhong Zhu, Caixia Kan
Summary: This paper presents a method to prepare Au/Pd core-shell nanostructures through a reductive co-precipitation method, and explores their electrocatalytic activity and durability for oxygen reduction in alkaline media. The experimental results demonstrate that the core-shell structure of AuBP@AuxPd1-x nanomaterials exhibits excellent performance, effectively combining the plasmonic properties of AuBPs and the catalytic properties of Pd nanoclusters.
NANOSCALE ADVANCES
(2022)
Correction
Chemistry, Physical
Chen Luo, Yan Shao, Hua Yu, Hong-zhi Ma, Yu-hao Zhang, Long Gu, Bo Yin, Ming-bo Yang
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Stefano Borocci, Armando Camerlingo, Felice Grandinetti, Maria Rutigliano, Nico Sanna
Summary: The complexes of He, Ne, Ar, Kr, and Xe with B3N3H6 were investigated using MP2, CCSD(T), and SAPT ab initio methods. The complexes can be described as mono-, di-, and tri-coordinated to the N atoms, with stability following the order N-mono < N-di < N-tri. The interactions are dominated by dispersion and the binding energies are within the range of 1 or 2 kcal mol(-1). The results were compared with a recent DFT study on larger BN sheets complexes [Phys. Chem. Chem. Phys. 24 (2022) 2554-2566.].
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
V. Nagarajan, R. Bhuvaneswari, R. Chandiramouli
Summary: In this study, stable phosphoborane was used as a sensor to detect isobutane and n-propane in Liquefied Petroleum Gas (LPG). Phosphoborane demonstrated structural stability and semiconducting nature, and exhibited promising adsorption properties for the LPG molecules.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Xiaoxi Xu, Zijiang Yang, Bayaer Buren, Maodu Chen
Summary: In this study, the time-dependent wave packet method was used to investigate the reaction channels and mechanisms of Ca+ + HD. The results show that the CaH+ + D reaction channel plays a primary role, which is consistent with experimental results. Complex forming and direct-abstraction reaction mechanisms exist in this reaction process.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Keshab Pandey, Hae Kyung Jeong
Summary: A free-standing silicon-carbon nanofiber composite film was synthesized and investigated for supercapacitor applications. It exhibited high specific capacitance, energy density, and power density. After 5000 cycles, the film showed excellent specific capacitance retention and Coulombic efficiency.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Xinyu Zhang, Haosong Li, Xiaoyu Cao, Jing Gao, Yong Wei, Jianzhuo Zhu
Summary: The evaporation behavior of nanosized water aggregations on two-dimensional electroneutral solid surfaces with different surface polar unit densities was investigated. The results showed that the evaporation rate changes non-monotonically with the surface polar unit density, and the minimum evaporation rate is obtained when the surface has a modest surface polar unit ratio of 66.7%.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Yanyan Xu, Rui Dai, Xiaojie Wang, Zhijun Qiao, Haowei Wen, Dianbo Ruan, Yuzuo Wang
Summary: This article presents an innovative solvothermal sodium insertion method for synthesizing Triphylite-NaFePO4, which demonstrates optimal electrochemical performance in sodium-ion batteries.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Meiyi Jiang, Kun Yang, Yancheng Liu, Li Yao
Summary: The geometric structure and electronic properties of transition metal M (M = Cu, Fe, Mn)-TiO2 (101) surface adsorbed by NO2 and N2O were calculated by density functional theory (DFT) and DFT + U theory. The results showed that the adsorption of NO2 and N2O on Mn and Fe atoms is more stable, and a large number of active electrons are formed around these atoms, facilitating the catalytic reactions.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Sergey A. Vyrko, Yulia G. Polynskaya, Nikita A. Matsokin, Andrey M. Popov, Andrey A. Knizhnik, Nikolai A. Poklonski, Yurii E. Lozovik
Summary: In this study, carbon nanobracelets, which are cyclic molecules composed of alternating polycyclic regions and double carbon chains, were investigated using spin-polarized density functional theory. The results show that carbon nanobracelets with odd number of monomers exhibit distinct electronic energy levels, band gaps, and carbon chain deformation compared to those with even number of monomers.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Chanchan Wang, Quan Yang, Yanzhi Ding, Xiaoyong Lu, Dong Tian
Summary: It has been found that the introduction of buffer layers improves the electrical performance of solid oxide fuel cells (SSOFCs). In this study, varying ratios of Gd-doped CeO2 were used as buffer layers in YSZ-based SSOFCs. The results demonstrate that the performance of SSOFCs is enhanced when a buffer layer is added, with the highest performance achieved using Ce0.8Gd0.2O2-delta (GDC20) as the buffer layer. This suggests that the use of GDC series buffer layers is an attractive strategy to optimize performance loss due to electrolyte-electrode interactions.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Wang Li, Yi-Fan Zhang, Jia-Bin Huang, Chang-Yang Wang, Feng Zhang, Jiu-Zhong Yang, Long Zhao
Summary: The gas-phase reaction of propargyl with vinylacetylene was investigated using synchrotron photoionization and molecular-beam mass spectrometry methodologies. The formation mechanisms of the resulting cyclic structures were examined using quantum computations. Two previously unidentified isomers were detected and identified for the first time.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Avijit Pramanik, Sanchita Kundu, Olorunsola Praise Kolawole, Kaelin Gates, Paresh Chandra Ray
Summary: This study investigates the influence of aspect ratio and quantum confinement on the single-photon and two-photon absorption cross-section of perovskite CsPbI3 nanorods. Experimental data shows that CsPbI3 nanorods have an extremely high two-photon absorption cross-section, significantly surpassing organic chromophores and other CsPbBr3 nanocrystals. Moreover, adjusting the aspect ratio can significantly enhance the absorption ability. Additionally, the study also reveals a moderate quantum confinement effect on the single-photon and two-photon absorption cross-section of the nanorods.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Hyon-Tae Pak, Jin-A Choe, Kyong-Sik Ju, Yong -Son Rim
Summary: Drug-loaded cellulose diacetate (CDA) membranes were prepared using different compositions of mixed solvent. The microstructure and performance of the membranes were investigated, and a method to predict drug release properties was proposed. The results showed that the composition of the mixed solvent significantly affected the overall performance of CDA membranes, and the release rates of drugs were related to Δdelta and the intrinsic viscosity of CDA.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Gabriella E. Ravin, E. Curotto
Summary: We have developed a systematic approach to optimize the training set sizes for neural networks in fitting ab initio potential energy surfaces. Using this approach, we have constructed several spectroscopic quality potential energy surfaces for [Li(H2)n]+, n = 1 - 9. The ground state properties have been computed for all the systems and selected states.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Guohua Xu, Lei Xu, Feng Zhang, Chunling Yu, Yu Song
Summary: NiS1.03@Ni7S6/carbon composite was successfully prepared using corn stalk as a carbon source via a simple adsorption-sulphurization process. The composite exhibited a specific capacitance of 1554.6 F/g at 1 A/g as a supercapacitor electrode, with a capacitance retention rate of 80.4% after 5000 cycles. Furthermore, the NiS1.03@Ni7S6/carbon//AC asymmetric supercapacitor showed a high energy density of 41.2 Wh kg-1 at a power density of 750 W kg-1, and excellent cycling stability with 86.8% capacitance retention after 10,000 cycles.
CHEMICAL PHYSICS LETTERS
(2024)