Article
Chemistry, Inorganic & Nuclear
Xuelian Hua, Li Ma, Mengyu Gan, Xudong Li, Ling Wang, Wei Zhao, Yuchao Zhang
Summary: Mesoporous tungsten carbide (WC) was successfully synthesized with large specific surface area and controllable structure by combining the advantages of MOF and carbide. The new catalyst Pt/WC/C, after depositing Pt nanoparticles, exhibited outstanding catalytic performance towards methanol oxidation and remarkable CO tolerance compared to commercial Pt/C-JM.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Physical
Kai Peng, Weiqi Zhang, Narayanamoorthy Bhuvanendran, Qiang Ma, Qian Xu, Lei Xing, Lindiwe Khotseng, Huaneng Su
Summary: In this study, a facile trace Ir-doping strategy was utilized to fabricate Ir-PtZn and IrPtCu alloy NDs catalysts, significantly improving the electrocatalytic activity and durability for methanol oxidation reaction (MOR). The Ir-PtZn/Cu NDs catalysts exhibited enhanced mass activities compared to undoped PtZn and PtCu, as well as Pt/C, in acid medium. The long-term durability test showed that the Ir-doped NDs retained a high percentage of their initial mass activities, highlighting the potential of Ir-doping in developing advanced electrocatalysts for direct methanol fuel cell applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
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
Chemistry, Physical
Fan Yang, Bo Yang, Karuppasamy Kohila Rani, Yuhui Wei, Xinglan Peng, Limin Wang, Xiaotian Liu, Du-Hong Chen, Youjun Fan, Wei Chen
Summary: A hydrothermal method was used to prepare Ni-functionalized porous carbon balls, which exhibited excellent electrocatalytic activity and CO anti-poisoning capability in methanol electrooxidation reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
E. E. Abdel-Hady, Ahmed Gamal, Hany Hamdy, Mohamed Shaban, M. O. Abdel-Hamed, Mahmoud A. Mohammed, Wael M. Mohammed
Summary: Prepared Ni1-xCrx nanoparticle samples loaded onto carbon nanofibers were studied for their electrocatalytic performance in methanol oxidation. Various techniques were used to analyze the samples' stoichiometry, structure, surface morphology, and electrochemical activity. It was found that adding Cr to Ni increased the activation energy of the electrooxidation reaction and improved the electrode stability. A powerful Ni-Pt-Cr-based catalyst for methanol electrooxidation was successfully fabricated using a novel approach.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Guodong Xu, Yun Lei, Keyu Wu, Rongguan Lv, Jing Li, Xiujuan Sun, Weiwei Cai
Summary: In this study, CeO2 is modified through a plasma-phosphating combing strategy and invited as Frustrated Lewis Pair to assist the catalytic MOR process on Pt sites. This strategy also leads to negatively charged sites on CeO2 surface as a host for Pt anchoring, facilitating the even dispersion of Pt nanocrystals. Moreover, this strategy affects the Ce3+/Ce4+ ratio and vacancy oxygen ratio on CeO2 surface, which are critical for OH generation and anti-CO.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Vi Thuy Thi Phan, Toan Minh Pham, Hau Quoc Pham, Tai Thien Huynh, Thi Hong Tham Nguyen, Van Thi Thanh Ho
Summary: This study focuses on the synthesis and application of a high-performance Pt3Co1/Ti0.9Ir0.1O2 catalyst for direct methanol fuel cells. By depositing Pt3Co1 alloy nanoparticles on a robust Ti0.9Ir0.1O2 support, the catalyst exhibits improved activity and poisoning tolerance, as well as lower cost and better stability compared to commercial Pt/C catalyst. The success of this work provides a foundation for further development of TiO2-based bimetallic catalysts in the electrochemical catalysis field.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Energy & Fuels
Siti Hasanah Osman, Siti Kartom Kamarudin, Sahriah Basri, Nabila A. Karim
Summary: This paper mainly introduces the application of organic aerogel materials in fuel cells. Due to their high conductivity and catalytic properties, organic aerogel materials are used as electrodes in low temperature fuel cells. Compared with traditional platinum electrodes, organic aerogel materials have the advantages of durability, economy, and high efficiency.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Guo-qing Li, Pu-kang Wen, Chen-qiang Gao, Tian-yi Zhang, Jun-yang Hu, Yu-hao Zhang, Shi-you Guan, Qing-feng Li, Bing Li
Summary: The Pt/CeO2-C catalysts with CeO2 pre-calcined at 300-600 degrees C showed improved methanol electro-oxidation catalytic activity compared to commercial Pt/C catalysts, with the catalyst pre-calcined at 400 degrees C displaying the highest electrochemical surface area and I-f/I-b ratio, indicating enhanced CO tolerance.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Maryam Yaldagard, Mehrdard Shahbaz, Hyoun Woo Kim, Sang Sub Kim
Summary: In this study, graphene nanoplates (GNPs) coated with sulfated zirconium dioxide (ZrO2) were used as support for platinum (Pt) catalysts in direct ethanol fuel cells (DEFCs). The Pt/S-ZrO2-GNP electrocatalyst showed higher electrocatalytic activity and carbon monoxide (CO) tolerance compared to unsulfated counterparts. The new material also exhibited increased ethanol oxidation activity and reaction kinetics. The study suggests that sulfonating is a practical approach for improving the performance of electrocatalysts in DEFCs.
Article
Chemistry, Physical
Lignesh Durai, Sivagaami Sundari Gunasekaran, Sushmee Badhulika
Summary: This study reports a composite electrocatalyst consisting of glassy carbon electrode modified with nickel oxide nanospheres, biomass-derived activated carbon nanosheets, and polypyrrole nanowire for direct methanol oxidation fuel cell application. The composite electrocatalyst exhibits high catalytic activity and stability, with superior performance over other metal-oxides based electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Elmira Pajootan, Sylvain Coulombe, Sasha Omanovic
Summary: 3D porous electrocatalysts with low platinum loading were synthesized using gas-phase pulsed laser ablation, showing higher methanol oxidation current and lower loss of active sites compared to commercial Pt/C. Increasing the electrolyte temperature significantly improved the efficiency of the electrocatalysts.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Z. Lotfi, M. B. Gholivand, M. Shamsipur
Summary: In this study, nickel-doped molybdenum diselenide nanosheets were successfully synthesized and integrated with carboxylated multiwalled carbon nanotubes, forming a composite material. The prepared nanocomposite showed excellent catalytic performance as an electrochemical catalyst for methanol oxidation reaction. It exhibited a low onset potential and high activity, and maintained 90% of its activity even after a long duration of time. Therefore, the nickel-doped molybdenum diselenide/carboxylated multiwalled carbon nanotubes composite is a promising and cost-effective anode catalyst for methanol oxidation reaction.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Kee Chun Poon, Quoc Tuan Phan, T. Thang Vo-Doan, Ming Lin, Hirotaka Sato
Summary: This study successfully demonstrated the preparation of amorphous Pt-B-P/C catalyst, which exhibited superior activity and resistance compared to commercial PtRu/C and crystalline Pt-B-P/C, mainly due to the synergistic effect of dual doping and amorphous structure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
Jinlong Qin, Huajie Huang, Yongshuai Xie, Shijie Pan, Yang Chen, Lu Yang, Quanguo Jiang, Haiyan He
Summary: A convenient low-temperature approach was reported to fabricate well-dispersed Rh nanocrystals on Ti3C2Tx MXene nanosheets. The ultrathin lamellar MXene structure provides efficient anchoring sites and enables direct electronic interaction, resulting in superior electrocatalytic properties.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Jin Soo Kang, Jin Kim, Myeong Jae Lee, Yoon Jun Son, Dong Young Chung, Subin Park, Juwon Jeong, Ji Mun Yoo, Heejong Shin, Heeman Choe, Hyun S. Park, Yung-Eun Sung
Article
Chemistry, Multidisciplinary
Soo Hong Lee, Jiheon Kim, Dong Young Chung, Ji Mun Yoo, Hyeon Seok Lee, Mm Jeong Kim, Bongjin Simon Mun, Soon Gu Kwon, Yung-Eun Sung, Taeghwan Hyeon
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Article
Chemistry, Physical
Minhyoung Kim, Ji Mun Yoo, Chi-Yeong Ahn, Jue-Hyuk Jang, Yoon Jun Son, Heejong Shin, Jiho Kang, Yun Sik Kang, Sung Jong Yoo, Kug-Seung Lee, Yung-Eun Sung
Article
Multidisciplinary Sciences
Myoung Hwan Oh, Min Gee Cho, Dong Young Chung, Inchul Park, Youngwook Paul Kwon, Colin Ophus, Dokyoon Kim, Min Gyu Kim, Beomgyun Jeong, X. Wendy Gu, Jinwoung Jo, Ji Mun Yoo, Jaeyoung Hong, Sara McMains, Kisuk Kang, Yung-Eun Sung, A. Paul Alivisatos, Taeghwan Hyeon
Article
Chemistry, Multidisciplinary
Sang Ihn Han, Sang-woo Lee, Min Gee Cho, Ji Mun Yoo, Myoung Hwan Oh, Beomgyun Jeong, Dokyoon Kim, Ok Kyu Park, Junchul Kim, Eun Namkoong, Jinwoung Jo, Nohyun Lee, Chaehong Lim, Min Soh, Yung-Eun Sung, Jongman Yoo, Kyungpyo Park, Taeghwan Hyeon
ADVANCED MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Tae Yong Yoo, Ji Mun Yoo, Arun Kumar Sinha, Megalamane S. Bootharaju, Euiyeon Jung, Hyeon Seok Lee, Byoung-Hoon Lee, Jiheon Kim, Wytse Hooch Antink, Yong Min Kim, Jongmin Lee, Eungjun Lee, Dong Wook Lee, Sung-Pyo Cho, Sung Jong Yoo, Yung-Eun Sung, Taeghwan Hyeon
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Physical
Dong Young Chung, Subin Park, Hyeonju Lee, Hyungjun Kim, Young-Hoon Chung, Ji Mun Yoo, Docheon Ahn, Seung-Ho Yu, Kug-Seung Lee, Mandi Ahmadi, Huanxin Ju, Hector D. Abruna, Sung Jong Yoo, Bongjin Simon Mun, Yung-Eun Sung
ACS ENERGY LETTERS
(2020)
Review
Physics, Applied
Ji Mun Yoo, Heejong Shin, Subin Park, Yung-Eun Sung
Summary: Fuel cell and water electrolyzer technology have been extensively researched for sustainable and renewable energy systems, but sluggish oxygen electrocatalysis hinders device efficiency. Developing highly efficient and durable nanostructured catalysts and utilizing in situ/operando analysis techniques to monitor electrode dynamics directly are key for improving oxygen electrocatalysis.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Jiheon Kim, Wonjae Ko, Ji Mun Yoo, Vinod K. Paidi, Ho Yeon Jang, Michael Shepit, Jongmin Lee, Hogeun Chang, Hyeon Seok Lee, Jinwoung Jo, Byung Hyo Kim, Sung-Pyo Cho, Johan Lierop, Dokyoon Kim, Kug-Seung Lee, Seoin Back, Yung-Eun Sung, Taeghwan Hyeon
Summary: Multi-metal oxide (MMO) materials have potential in catalyst design. However, understanding the (electro)catalytic activity of MMOs is limited due to their complex multi-element nature. This study synthesized uniform-sized multi-metal spinel oxide nanoparticles and systematically studied the contributions of each element to enhance the electrocatalytic oxygen reduction reaction (ORR) activity.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Chi-Yeong Ahn, Sungjun Kim, Hyuck Jae Choi, Jongmin Lee, Sun Young Kang, Ok-Hee Kim, Hyungwon Shim, Young-Shik Kim, Yung-Eun Sung, Oh Joong Kwon, Yong-Hun Cho
Summary: Research on corrosion reaction of carbon under cell reversal conditions and the effect of platinum content on fuel cell performance have been conducted, showing that catalysts with higher platinum content have better resistance to cell reversal.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Multidisciplinary
Ji Mun Yoo, Heejong Shin, Dong Young Chung, Yung-Eun Sung
Summary: Electrocatalysis is essential for renewable energy conversion and fuel production in future energy systems. Various nanostructures have been explored to enhance electrocatalytic activity, but ensuring long-term stability of electrocatalysts is crucial for reliable energy device operation. The challenge lies in achieving both high activity and robust stability simultaneously, as the structure-property relationships affecting activity and stability differ. Introducing functional structural units into catalyst design is essential to achieve electrochemical stability while maintaining high activity.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Jinwoung Jo, Ji Mun Yoo, Dong Hyeon Mok, Ho Yeon Jang, Jiheon Kim, Wonjae Ko, Kyungbeen Yeom, Megalamane S. Bootharaju, Seoin Back, Yung-Eun Sung, Taeghwan Hyeon
Summary: This study achieved a (001) facet-defined Co-Mn spinel oxide surface with different surface compositions using epitaxial growth. By adopting composition gradient synthesis, the strain effect on catalytic activity was minimized. The results showed a volcano-like trend in the oxygen reduction reaction activity with changing Mn/Co ratios, indicating that an adequate charge transfer could enhance the catalytic activity.
Review
Chemistry, Multidisciplinary
Jiheon Kim, Ji Mun Yoo, Hyeon Seok Lee, Yung-Eun Sung, Taeghwan Hyeon
Summary: This review highlights recent advances in M-N-C catalysts in terms of atomic-level understanding and design of mononuclear active sites, the effect of the porous carbon structure on the electrocatalytic performance, and improving catalytic stability, and suggests future directions to enhance M-N-C catalysts for highly active and stable PEMFC performance.
TRENDS IN CHEMISTRY
(2021)