Article
Chemistry, Multidisciplinary
Jiangjiang Zhang, Erqing Wang, Shiqiang Cui, Shubin Yang, Xiaolong Zou, Yongji Gong
Summary: Two-dimensional MXene-loaded single-atom catalysts have gained increasing attention. Pt single atoms are successfully immobilized on oxygen vacancies of monolayer Ti3C2Tx flakes, and the resulting catalyst shows excellent performance in hydrogen evolution reaction.
Article
Chemistry, Multidisciplinary
Jiangjiang Zhang, Erqing Wang, Shiqiang Cui, Shubin Yang, Xiaolong Zou, Yongji Gong
Summary: By immobilizing Pt SAs on the O-V of Ti3C2Tx, a novel catalyst with excellent HER performance was successfully constructed, showing small overpotential and high activity.
Article
Nanoscience & Nanotechnology
S. Dong, W. Liu, S. Liu, F. Li, J. Hou, R. Hao, X. Bai, H. Zhao, J. Liu, L. Guo
Summary: Pt single-atom-anchored amorphous ZrO2 nanowires are fabricated as an efficient photocatalyst for CO2 reduction, exhibiting superior CO yielding rate and selectivity. The amorphous nature and ZrOPt charge bridges contribute to the enhanced CO2 reduction performance.
MATERIALS TODAY NANO
(2022)
Article
Chemistry, Multidisciplinary
Yuanyuan Li, Haodong Wang, Haohong Song, Ning Rui, Matthew Kottwitz, Sanjaya D. Senanayake, Ralph G. Nuzzo, Zili Wu, De-en Jiang, Anatoly I. Frenkel
Summary: This study successfully improved the activity of CO oxidation by designing Pt single atom catalysts supported on Gd-doped ceria. The results showed that a new Pt single atom site formed under CO pretreatment at elevated temperatures can significantly reduce the energy barrier of CO oxidation. The reactivity and reaction mechanism of the catalyst can be tuned by changing the local electronic and atomic structure of the Pt single atom through Gd doping.
Article
Nanoscience & Nanotechnology
Dongxiao Kan, Dashuai Wang, Yingjie Cheng, Ruqian Lian, Bo Sun, Kaiyun Chen, Wangtu Huo, Yizhan Wang, Gang Chen, Yingjin Wei
Summary: MXenes are utilized as substrate materials for single-atom catalysts (SACs) due to their unique two-dimensional structure, high surface area, and high electronic conductivity. This study identified the use of O-terminated MXenes as substrates may weaken the catalytic activity of Pt, leading to the successful construction of bifunctional Pt SACs by adjusting the electronic structure of MXenes. Moreover, practical application factors such as overpotential, solvation effect, and reaction barriers were considered to screen out four high-performance bifunctional oxygen reduction reaction/oxygen evolution reaction (ORR/OER) catalysts originated from Cr-based MXenes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Jia Li, Qiuyun Zhou, Mufei Yue, Siguo Chen, Jianghai Deng, Xinyu Ping, Yan Li, Jing Li, Qiang Liao, Minhua Shao, Zidong Wei
Summary: A novel catalyst consisting of multi-atom Pt metal centers stabilized by atomically dispersed ZnFe-NC support through Pt-N bonds is reported, showing high stability, 100% exposure of surface Pt atoms, and excellent fuel cell performance. The catalyst combines the advantages of single-atom catalysts (SACs) and nanoparticles (NPs), achieving a maximal power output of 1.02 W cm-2 with an ultralow Pt loading of 0.035 mg cm-2 at the cathode. DFT calculations reveal the critical role of the strongly coupled Pt-N bond in stabilizing the cross-linked Pt structure.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Xiaoyang Wang, Liang Zhang, Yuxiang Bu, Wenming Sun
Summary: The study investigates the effects of single atom Pt on oxygen vacancy migration and water dissociation on anatase TiO2(1 0 1) surface through first-principles calculations. Results show that Pt-ads and Pt-5c modes accelerate O-v migration, while Pt-2c and Pt-6c modes decelerate it. Oxygen-poor conditions favor Pt-ads and Pt-2c formation, while oxygen-rich conditions favor Pt-5c and Pt-6c formation.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Liang-Chen Lin, Yun-Sheng Cheng, Chun-Han Kuo, Ying-Cheng Chen, Wei-Chieh Liao, Lu-Yu Chueh, Syu-Cheng Ye, Han-Yi Chen, Hsin-Yi Tiffany Chen, Yung-Tin Pan
Summary: This work demonstrates the design of atomic-scale metal species for increasing the robustness of functional nanomaterials under harsh thermal and electrochemical working environments.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Applied
Q. Henry Martinez, Alvaro A. Amaya, Edgar A. Paez-Mozo, O. Fernando Martinez, Sabine Valange
Summary: Selective oxidation of terpenes using a Mo((VI))Cl(2)O(2)Bipy/TiO2-NT catalyst under photo-assisted conditions was successful, leading to high selectivities in producing epoxides from monoterpenes. The chiral center in limonene was found to govern the formation of diastereoisomers during the reaction process, indicating stereoselectivity of the catalyst. Additionally, the Mo((VI))Cl(2)O(2)Bipy/TiO2-NT catalyst demonstrated high stability under the reaction conditions, as shown by recycling studies.
Article
Chemistry, Physical
Takeshi Nagata, Akira Oda, Yuta Yamamoto, Risa Ichihashi, Kyoichi Sawabe, Atsushi Satsuma
Summary: In this study, we developed a Pt-IV single-atom/β-MnO2 composite as a CO oxidation catalyst that is highly efficient at low temperatures. By strong interaction with Mn-IV defect sites on the β-MnO2 surface, stable single Pt-IV sites were formed, which exhibited high resistance to CO poisoning. Under oxygen-rich conditions, the catalyst showed reaction rates of 0.676 and 0.206 mol(CO) h(-1) gPt(-1) at 25℃ and 0℃ respectively, setting a new record for low-temperature CO oxidation catalysis under near atmospheric conditions.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Emilia Kuzniak-Glanowska, Dorota Glosz, Grzegorz Niedzielski, Jedrzej Kobylarczyk, Monika Srebro-Hooper, James G. M. Hooper, Robert Podgajny
Summary: The square-planar [PtX4](2-) complexes (X = Cl, Br) were successfully incorporated into preprogrammed hybrid organic-inorganic systems, forming new composite materials with pi-acidic hexaazaphenylenehexacarbonitrile, HAT(CN)(6). The aggregates exhibited certain binding constants and spectral properties in MeCN solution, and the isomorphism of the resulting solids was confirmed based on their crystal structures.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Xiaoyang Wang, Liang Zhang, Yuxiang Bu, Wenming Sun
Summary: This study revealed the effect of Pt atoms on oxygen vacancy migration and found that under oxygen-rich conditions, the substitution of Pt atoms can affect the formation and migration of oxygen vacancies. In bimetal centers, the interactions between atoms can influence the process of water dissociation.
Article
Chemistry, Multidisciplinary
Xing Li, Yanghua He, Shaobo Cheng, Boyang Li, Yachao Zeng, Zhenhua Xie, Qingping Meng, Lu Ma, Kim Kisslinger, Xiao Tong, Sooyeon Hwang, Siyu Yao, Chenzhao Li, Zhi Qiao, Chongxin Shan, Yimei Zhu, Jian Xie, Guofeng Wang, Gang Wu, Dong Su
Summary: The thermally driven structure evolution of Pt-Co binary catalyst systems was investigated, revealing the crucial roles of pre-doping CoN4 sites in carbon supports and the initial Pt NP sizes in forming either Pt3Co intermetallics or single Pt/Co metal sites.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Xing Cheng, Yueshuai Wang, Yue Lu, Lirong Zheng, Shaorui Sun, Hongyi Li, Ge Chen, Jiujun Zhang
Summary: This study reports a Pt-Co dual site single atom alloy catalyst, which achieves efficient four-electron ORR pathway by decorating isolated Pt atoms on nitrogen-doped graphitized carbon nanotubes. The catalyst exhibits superior mass activity in 0.1 M HClO4 electrolyte.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Lei Zhang, Tong Yang, Wenjie Zang, Zongkui Kou, Yuanyuan Ma, Moaz Waqar, Ximeng Liu, Lirong Zheng, Stephen J. Pennycook, Zhaolin Liu, Xian Jun Loh, Lei Shen, John Wang
Summary: The study demonstrates that atomically dispersed Pt monomers strongly interacting on a Mo2C support can serve as a model catalyst for the four-electron ORR, achieving higher activity and selectivity through beneficial interactions between two closely neighboring but non-contiguous Pt single atom sites (quasi-paired Pt single atoms).