Article
Chemistry, Physical
Jingyun Zhang, Yajun Zhong, Chunyan Zhang, Junyu Zhang, Zhenjing Zhuang
Summary: Mesoporous Pt-Pd bimetallic core-shell nanospheres with palladium-rich cores and platinum-rich shells were synthesized via a simple wet chemical strategy mediated by nitrogen-doped carbon dots. These nanospheres showed superhigh oxidase activity and excellent oxidase-like catalytic efficiency due to their large active surface area.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Eun Jun Lee, Yaeun Seo, Haney Park, Min June Kim, Dalyoung Yoon, Jin Woo Choung, Chang Hwan Kim, Jungkyu Choi, Kwan-Young Lee
Summary: In this study, a thick ZrO2 shell was introduced to improve the thermal stability of SiO2@Pt@ZrO2 catalysts for the simultaneous oxidation of CO and hydrocarbons. Etched SiO2@Pt@ZrO2 catalysts were proposed to enhance gas accessibility, which improved the oxidation activity and thermal stability of the catalysts. Properly etched catalysts with maintained core-shell structure showed the best performance in simultaneous oxidation of CO and hydrocarbons.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Minghao Xie, Zhiheng Lyu, Ruhui Chen, Min Shen, Zhenming Cao, Younan Xia
Summary: In this study, Pt-Co@Pt octahedral nanocrystals were successfully synthesized with an intermetallic Pt-Co core and an ultrathin Pt shell dominated by {111} facets on the surface. These nanocrystals showed significantly improved catalytic performance towards the oxygen reduction reaction compared to a commercial Pt/C catalyst, with a mass activity 13.4 times higher and a specific activity 29.5 times higher. Importantly, the mass activity of the nanocrystals only decreased by 21% after 30,000 cycles of accelerated durability testing, indicating their outstanding potential as catalysts for ORR and related reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Xianzhuo Lao, Xuejiang Liao, Chen Chen, Jiasheng Wang, Likang Yang, Ze Li, Jun-Wei Ma, Aiping Fu, Hongtao Gao, Peizhi Guo
Summary: A facile low-temperature synthesis method is employed to successfully synthesize Pd-enriched-HEA-core and Pt-enriched-HEA-shell nanoparticles with a single phase of face-centred cubic structure. These nanoparticles show excellent electrocatalytic activity and durability for methanol oxidation and ethanol oxidation reactions. This study provides a promising direction to find a feasible route for scalable high-entropy alloy manufacturing with potential applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Electrochemistry
Qingchun Wang, Zihao Wang, Xiaolong Liang, Shengli An, Changkun Cai, Yuanyuan Liu, Jinxiao Bao, Xiwen Song
Summary: The effects of CeO2-ZrO2 solid solution on the electrocatalytic activity, stability and anti-CO poisoning performance of methanol fuel cell anodes were investigated. Pt/CeO2-ZrO2/GO showed higher catalytic activity and stability against CO oxidation due to the addition of Zr4+ into the CeO2 lattice, which increased oxygen activity and storage capacity.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Engineering, Environmental
Busuyi O. Adebayo, Han Yu, Ali A. Rownaghi, Xinhua Liang, Fateme Rezaei
Summary: In this study, Pt nanoparticles were loaded on SiO2, TiO2-SiO2, or ZrO2-SiO2 particles to investigate their performance in sequential adsorption and desorption/catalytic oxidation of benzene. The results showed that Pt nanoparticles and ZrO2 exhibited synergistic effects in catalytic oxidation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Wenxin Guo, Liming Cheng, Xiaoping Gao, Jie Xu, Cai Chen, Peigen Liu, Dayin He, Lin Tian, Jia Song, Huang Zhou, Yuen Wu
Summary: In this study, a highly efficient 3D hierarchical porous oxygen reduction reaction (ORR) catalytic system was developed by incorporating stable and multiaperture zirconia (ZrO2) and conductive N-doped carbon (NC) into a Pt-based catalyst. The Pt-ZrO2 interface greatly enhances the activation of O2, while the hierarchical porous structure of a NC-encapsulated nanoframework promotes mass diffusion and electron transfer, leading to improved ORR activity and stability. This catalytic system exhibits significantly higher mass activity/specific activity than commercial Pt/C, and shows negligible activity decay and morphological stability after long-term cycling. The integration of hierarchical porous systems for optimizing the geometric and electric structure of Pt-based catalysts has great potential for practical proton exchange membrane fuel cells (PEMFCs).
Article
Chemistry, Physical
Wenxin Guo, Liming Cheng, Xiaoping Gao, Jie Xu, Cai Chen, Peigen Liu, Dayin He, Lin Tian, Jia Song, Huang Zhou, Yuen Wu
Summary: In this work, a highly efficient 3D hierarchical porous oxygen reduction reaction (ORR) catalytic system was developed by introducing stable and multiaperture zirconia (ZrO2) and conductive N-doped carbon (NC) into a Pt-based catalyst. The Pt-ZrO2 interface greatly enhanced the activation of O2 by modulating the electronic state of Pt nanoparticles. The hierarchical porous structure of a NC-encapsulated nanoframework compensated for system conductivity, promoting mass diffusion and electron transfer, thus enhancing the ORR activity and stability.
Article
Engineering, Environmental
Zhen Ren, Yanmeng Li, Luyao Yu, Lei Wang, Yusen Yang, Min Wei
Summary: In this study, a platinum nanoparticles supported on monoclinic ZrO2 catalyst is reported, which exhibits outstanding catalytic performance for the selective oxidation of glycerol to glyceric acid. Experimental methods confirm the formation of Pt delta+-Ov-Zr3+ structure at the metal-support interface, which serves as the active site for promoting glycerol oxidation. This study provides a valid paradigm for developing heterogeneous catalysts with metal-support synergistic effect for selective oxidation reactions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Rongrong Fan, Zhaoqiang Li, Yu Wang, Yan Wang, Zhiyong Ding, Cheng Zhang, Na Kang, Xin Guo, Rong Wang
Summary: ZrO2 and WO3 additives were found to synergistically improve the activity and thermal stability of diesel oxidation catalysts, enhancing the oxidation reactions of CO, C3H6, and NO. ZrO2 improved metal dispersion and increased surface-chemisorbed oxygen, while WO3 increased active sites and metal dispersion in fresh samples.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Caikang Wang, Xian Jiang, Qicheng Liu, Jiaqian Ding, Juan Zhou, Yawen Tang, Gengtao Fu, Jong-Min Lee
Summary: This study presents the synthesis of one-dimensional Au@PtPd@Pt nanowires using a template-induced method, which exhibit exceptional electrocatalytic activity and long-term electrochemical stability for alkaline hydrogen evolution reaction (HER). The nanowires' unique structure, consisting of ultrathin 1D nanowires with a core-shell-satellite structure and trimetallic elemental compositions, contributes to their superior performance. Moreover, the integrated Au@PtPd@Pt//RuO2 electrolyzer achieves a lower operating potential, showing great potential for practical water electrolysis.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Rubina Khatun, Nazia Siddiqui, Rohan Singh Pal, Sonu Bhandari, Tuhin Suvra Khan, Shivani Singh, Mukesh Kumar Poddar, Chanchal Samanta, Rajaram Bal
Summary: This study investigates the low temperature reforming of methane with CO2 over mono- and bi-metallic solid solution catalysts. The Pt-Ni/CeO2 catalyst shows excellent performance with high conversion and selectivity at low temperatures. DFT calculations reveal that Pt-Ni/CeO2 catalyst has lower activation energy.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Zixin Wang, Hui Wang
Summary: This study synthesized Au@C/Pt core@shell/satellite supra-nanostructures and demonstrated the modulation of catalytic reaction kinetics through plasmonic antenna effects and photothermal transduction. The interplay between plasmonic and catalytic effects in these antenna-reactor nanohybrids was investigated using a specific model reaction.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Physical
Shiqi Peng, Rong Li, Yu Huang, Yufei Zhang, Jun-ji Cao, Shuncheng Lee
Summary: This study introduces a novel Pt-ZrO2 nanoparticles with an oxygen vacancy (V-O) associated SMSI interface for catalytic oxidation of formaldehyde (HCHO) at room temperature, achieving high reactivity and selectivity in generating reactive oxygen species. The constructed interface plays a crucial role in enhancing HCHO removal and conversion efficiency.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Yinan Fan, Adrien Girard, Michael Waals, Caroline Salzemann, Alexa Courty
Summary: Bimetallic core-shell nanoparticles composed of silver and platinum were synthesized and their optical properties were studied through UV-visible absorption spectroscopy and calculations. The particles showed higher catalytic activity compared to monometallic silver and platinum nanoparticles in the reduction of 4-nitrophenol. This study highlights the potential of these bimetallic core-shell nanoparticles in plasmonic catalysis.
ACS APPLIED NANO MATERIALS
(2023)
