Article
Chemistry, Multidisciplinary
Estefania Tiburcio, Rossella Greco, Marta Mon, Jordi Ballesteros-Soberanas, Jesus Ferrando-Soria, Miguel Lopez-Haro, Juan Carlos Hernandez-Garrido, Judit Oliver-Meseguer, Carlo Marini, Mercedes Boronat, Donatella Armentano, Antonio Leyva-Perez, Emilio Pardo
Summary: Palladium single atoms can be spontaneously formed in neat benzyl alcohols and used for organic oxidation reactions without additives or solvents. By stabilizing Pd SACs within a metal-organic framework, a solid catalyst was successfully prepared and characterized.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Weiwei Yang, Felipe Polo-Garzon, Hua Zhou, Zhennan Huang, Miaofang Chi, Harry Meyer III, Xinbin Yu, Yuanyuan Li, Zili Wu
Summary: In this study, different Pd single atom catalysts on ceria support were obtained by thermal pretreatment, leading to enhanced activity for methane oxidation. The enhanced activity is related to the oxygen-deficient local structure and elongated interacting distance with ceria.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Roberto Camposeco, Salvador Castillo, Rodolfo Zanella
Summary: The catalytic oxidation of C3H8 and CO by Pd nanoparticles supported on MnOx/TiO2 synthesized by the sol-gel method was investigated. The results showed a strong interaction between Pd and MnOx/TiO2, and the annealing temperature of the TiO2 support influenced the catalytic properties of the Pd-MnOx/TiO2 catalyst. The catalysts with 1 and 2 wt% of Pd loading supported on MnOx/TiO2 exhibited excellent catalytic activity for the oxidation of C3H8 and CO at different temperature intervals.
Article
Chemistry, Physical
Man Ho Han, Dongjin Kim, Sangkuk Kim, Seung-Ho Yu, Da Hye Won, Byoung Koun Min, Keun Hwa Chae, Woong Hee Lee, Hyung-Suk Oh
Summary: This study demonstrates that nickel sulfide nanoparticles can mimic the electronic structure of nickel single atom catalysts and enhance catalytic activity in CO2 reduction reaction. However, the stability of nickel sulfide is low and needs further improvement.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Seungsun Shin, Taehui Kwon, Youngmi Lee
Summary: Binary palladium-rhodium oxide composite nanofibers with diverse atomic ratios were synthesized and their electrocatalytic activities for CO oxidation and CO sensing were investigated. Pd0.55Rh0.45Oy NFs showed the highest CO sensitivity among the group, along with excellent reproducibility, resistance to CO poisoning, and selectivity over NO.
APPLIED SURFACE SCIENCE
(2022)
Review
Electrochemistry
Adewale K. Ipadeola, Kamel Eid, Aderemi B. Haruna, Aboubakr M. Abdullah, Kenneth I. Ozoemena
Summary: This mini-review provides an update on the recent advancements in optimizing the electrocatalytic CO oxidation of Pd-based nanostructures in different electrolytes. It focuses on controlling synthesis methods and morphologies to enhance the reaction efficiency, and discusses the challenges and future prospects for commercial applications.
Article
Chemistry, Physical
Georges Sitja, Claude R. Henry
Summary: The study explores the activity of Pd-n (n = 1-5) clusters on nanostructured alumina films on a Ni3Al(111) surface, finding that single atoms become larger clusters at 533 K with activity proportional to the number of atoms in each cluster. The turnover frequency (TOF) per (surface-) atom remains constant at 533 K, similar to larger clusters and Pd(111) extended surfaces under the same experimental conditions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Ingeborg-Helene Svenum, Marie D. Stromsheim, Jan Knudsen, Hilde J. Venvik
Summary: The surface reactivity during CO oxidation over Pd(111) and Pd75%Ag25%(111) single crystals has been investigated using NAP-XPS. The results show that Pd(111) forms a (root 6x root 6) Pd5O4 surface oxide under highly active conditions, while Pd75%Ag25%(111) exhibits lower CO2 formation rate, no surface oxide, and reversible scrambling of surface composition. The findings suggest that both surface composition and termination affect reactant activation.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Analytical
Serkan Erdemir, Sait Malkondu, Mehmet Oguz
Summary: High levels of residual palladium can have serious negative health effects. A novel fluorescent probe has been designed for the rapid detection of palladium and carbon monoxide (CO). The probe can selectively detect Pd and CO with naked eyes and distinguish different species of Pd. The method has practical applications in drug residue and soil analysis, as well as bioimaging of Pd and CO concentration changes in cells.
Article
Chemistry, Applied
Marie D. Stromsheim, Ingeborg-Helene Svenum, Mehdi Mahmoodinia, Virginia Boix, Jan Knudsen, Hilde J. Venvik
Summary: The study observed that the CO2 formation profile during CO oxidation on a Pd75%Ag25%(100) single crystal is influenced by the history of the sample and previous heating conditions. The NAP-XPS data confirmed a dynamic segregation behavior of Pd in the surface region during temperature cycling. However, the relative area assessment of the Pd 3d(5/2) core level was not able to capture all the surface dynamics due to probing depth limitations.
Article
Chemistry, Multidisciplinary
Congmin Zhang, Lichen Bai, Min Chen, Xuejiao Sun, Mengzhao Zhu, Qinglong Wu, Xiaoping Gao, Qun Zhang, Xusheng Zheng, Zhen-Qiang Yu, Yuen Wu
Summary: The site density of Mo single atoms on RPCN is controlled by a local carbonization strategy, capturing adventitious O atoms and forming O-covered Mo-N-3 coordination. Coordinated O atoms create a catalytic environment with Lewis base and gather photo-generated electrons under light. The resulting Mo-RPCN exhibits a strong ability for hydrogen abstraction.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Yifan Wang, Ya-Qiong Su, Emiel J. M. Hensen, Dionisios G. Vlachos
Summary: Subnanometer catalysts provide high noble metal utilization and superior performance for various reactions. However, understanding their atomic-scale structures and properties under working conditions is challenging due to the large configurational space. In this study, an efficient multiscale framework integrating density functional theory (DFT) calculations, cluster expansion, machine learning, and structure optimization is introduced to predict the stability of catalysts exposed to adsorbates. The framework enables automatic discovery of stable catalyst structures and a systematic strategy to exploit properties at the subnanometer scale. Simulation results for CO-adsorbed Pd-n (n = 1-55) clusters on CeO2(111) reveal that CO can facilitate restructuring by stabilizing smaller planar structures and bilayer structures of specific intermediate sizes.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiaoqing Lu, Jiao Li, Shoufu Cao, Yuying Hu, Chunyu Yang, Zengxuan Chen, Shuxian Wei, Siyuan Liu, Zhaojie Wang
Summary: This study investigates the effect of introducing S or P atoms into N coordination on the electronic structure and catalytic performance of FeN4 SACs. It demonstrates that FePN3 can effectively activate O-2 and promote ORR, while FeSN3 is beneficial to H2O activation and OER. Both FePN3 and FeSN3 exhibit outstanding stability. The N,P and N,S co-coordination provides a better catalytic environment for SACs in ORR and OER.
Article
Chemistry, Physical
Yasukazu Kobayashi, Shohei Tada, Masaru Kondo, Kakeru Fujiwara, Hiroshi Mizoguchi
Summary: Intermetallic YIr2 nanoparticles with a high surface area were prepared and found to possess high catalytic activity for the hydrogenation of cyclohexanone to cyclohexanol. This unique activity can be attributed to the charge transfer from Y to Ir, as supported by density functional theory calculations.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Mingzhu Jiang, Jing Chen, Yanxia Gao, Xuelong Lv, Dongxu Yan, Hongpeng Jia
Summary: The interaction between Cu and Mn on the catalyst surface can effectively immobilize Cu single atoms, restrain their aggregation, and improve CO oxidation activity. The formation of the Cu-O-Mn entity benefits CO catalytic activity by accelerating reactions through the migration of reactive oxygen species and coordination effect of active centers.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)