Article
Chemistry, Physical
Yafeng Zhang, Kai Ye, Qingqing Gu, Qike Jiang, Juan Qin, Deying Leng, Qianru Liu, Bing Yang, Feng Yin
Summary: In this study, Pd@Pt-based core-shell nanoparticles were successfully synthesized using a versatile co-reduction method, with the ability to effectively tune the shell component and improve the oxygen reduction reaction (ORR) activity. By incorporating a third metal into the shell layer, the activity of the catalysts was significantly enhanced, showing lower activity decay after cycling compared to the catalyst without the third metal.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Eunjik Lee, Dong-Je Lee, Yujin Kim, Changki Kim, Yongmin Kwon, Hyunjoon Lee, Iksung Lim, Byoeng-Seon An, Tae-Hyun Yang, Gu-Gon Park
Summary: Platinum-based intermetallics are efficient electrocatalysts due to their high catalytic activity and durability. This study developed a facile and efficient synthesis method for intermetallic PtFe@Pt core-shell nanoparticles using ultrasound-assisted coating. The resulting nanoparticles exhibited superior oxygen reduction reaction performance, enhancing the commercial viability of polymer electrolyte fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Shuqi Hu, Yuying Liu, Shuangbao Wang, Xinyi Zhang, Pei Kang Shen
Summary: The study demonstrates that ultrathin Co(OH)(2) nanoparticles can be converted into Co3O4-Pt core-shell nanoparticles with high Pt utilization through thermal annealing and controlled replacement reaction on 3D graphene. This nanostructure shows optimized mass activity and specific activity, significantly outperforming traditional Pt/C catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Iksung Lim, Eunjik Lee, Hyun-Uk Park, Jeongyun Jang, Namgee Jung, Tae-Hyun Yang, Sung-Dae Yim, Gu-Gon Park
Summary: The development of highly active and durable electrocatalysts is crucial for the commercialization of polymer electrolyte fuel cells (PEFCs). Core-shell nanoparticles, especially ternary Pt-based ones, have shown promising potential in maximizing Pt utilization and catalytic performance for the sluggish oxygen reduction reaction (ORR). Additionally, post-heat treatment under different gas atmospheres can significantly influence the structural characteristics and catalytic activity of the electrocatalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Deok-Hye Park, Yo-Seob Kim, Sang-Beom Han, Woo-Jun Lee, Hak-Joo Lee, Yong-Soo Lee, Sang-Hyun Moon, Kyung-Won Park
Summary: A novel bi-metallic phosphide structure has been reported as an electrocatalyst with enhanced electrochemical activity compared to traditional catalysts, showing superior performance in OER, ORR, and MOR applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Francesca Lorandi, Keti Vezzu, Angeloclaudio Nale, Gioele Pagot, Yannick H. Bang, Enrico Negro, Vito Di Noto
Summary: This report presents the interplay between synthesis parameters, physicochemical properties, and electrochemical performance of core-shell low-Pt electrocatalysts for the oxygen reduction reaction. The study focuses on the impact of pyrolysis temperature, support core composition, and an electrochemical dealloying-activation step on the morphology and stability of active sites. The results show that the presence of graphene and carbon in the support improves the dispersion of active sites, leading to vastly improved mass activity and durability.
JOURNAL OF POWER SOURCES
(2023)
Article
Biochemistry & Molecular Biology
Quan Wang, Baosen Mi, Jun Zhou, Ziwei Qin, Zhuo Chen, Hongbin Wang
Summary: Hollow-structure Pt-Ni electrocatalysts were investigated as ORR catalysts and found to exhibit higher specific activity and mass activity compared to commercial Pt/C catalysts. Furthermore, they showed better stability during start-stop operation and accelerated durability tests.
Article
Chemistry, Physical
Xiao Duan, Feng Cao, Rui Ding, Xiaoke Li, Qingbing Li, Ruziguli Aisha, Shiqiao Zhang, Kang Hua, Zhiyan Rui, Yongkang Wu, Jia Li, Aidong Li, Jianguo Liu
Summary: In this study, sub-2 nm Co-doped Pt nanoclusters with a large ECSA were synthesized, displaying improved mass activity and stability compared to commercial Pt/C. The doping technique led to enhanced performance and reduced voltage loss in high current density conditions in PEMFCs.
ADVANCED ENERGY MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Xueru Zhao, Kotaro Sasaki
Summary: This article introduces the application of Pt-based core-shell catalysts in proton-exchange membrane fuel cells. By low Pt loading and high corrosion resistance, Pt-based core-shell catalysts can alleviate the drawbacks of existing catalysts and enhance the activity and stability of the oxygen reduction reaction. The article provides a detailed overview of the synthesis strategies, catalytic mechanisms, and optimization of the catalysts' performance by considering factors such as shape, composition, and surface structure. The potential of core-shell catalysts in real fuel cells is evaluated.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Electrochemistry
Yunjie Yang, Minli Bai, Jizu Lv, Linsong Gao, Yang Li, Xuecheng Lv, Yubai Li, Yongchen Song
Summary: In this study, a 1D model was proposed to investigate the structural evolution and aging mechanism of fuel cell cathode catalytic layer. The results show that the severe dissolution of catalyst particles near the membrane interface leads to significant loss and uneven aging of the catalyst.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Raghunandan Sharma, Saso Gyergyek, Peter Brilner Lund, Shuang Ma Andersen
Summary: The study presents a scalable and simple process for recovering Pt and Ru from spent MEAs of low-temperature PEMFCs. The recovered Pt and Ru showed high efficiency through refluxing in a mixture of 1 M HCl and H2O2, with Ru separated as Ru-hydroxide precipitates and Pt redeposited on a carbon support to form recycled Pt/C electrocatalysts, which exhibited comparable performance to commercial counterparts.
ACS APPLIED ENERGY MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Chao Wang, Cuihua An, Chunling Qin, Hassanien Gomaa, Qibo Deng, Shuai Wu, Ning Hu
Summary: This review summarizes the recent progress in noble metal-based core-shell catalysts for oxygen reduction reactions in proton exchange membrane fuel cells. It highlights the effects of preparation methods, temperature, doping elements, and shell layers on the catalyst performance. The difficulties of mass production and high cost of these catalysts are also discussed. The review proposes research directions for the development of high-performance catalysts with simple synthesis and low cost.
Article
Nanoscience & Nanotechnology
Zipeng Zhao, Zeyan Liu, Ao Zhang, Xingxu Yan, Wang Xue, Bosi Peng, Huolin L. Xin, Xiaoqing Pan, Xiangfeng Duan, Yu Huang
Summary: The authors report the design and development of ultrathin PtCo nanocatalysts encased in graphene nanopockets, which exhibit excellent electrochemical accessibility and durability under low loading conditions. These catalysts show promising fuel cell performance, making them ideal for reducing fuel cell costs.
NATURE NANOTECHNOLOGY
(2022)
Article
Engineering, Environmental
Qi Xue, Hui-Ying Sun, Ya-Nan Li, Ming-Jun Zhong, Fu-Min Li, Xinlong Tian, Pei Chen, Shi-Bin Yin, Yu Chen
Summary: The study successfully developed a rapid synthesis method for high-quality Au@Ir core-shell nanowires, demonstrating their potential application in electrocatalysis with superior catalytic activity and durability.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Bingqian Wang, Jianyu Liu, Huaiyun Ge, Siwei Fan, Guanghui Zhang, Lingxue Zhao, Guangda Li
Summary: A cubic core-shell NiCoSx/CoS2 composite catalyst was successfully prepared, showing excellent performance in oxygen evolution and reduction reactions, as well as in zinc-air batteries and flexible batteries.
