Article
Engineering, Environmental
Jooyoung Kim, Hyunki Kim, Sungjun Kim, Jue-Hyuk Jang, Hyuntae Sohn, Seok Jin Hong, Junhyeong Kim, Gyeong Ho Han, Seonghyun Choe, Yung-Eun Sung, Soo Young Kim, Ho Won Jang, Tae Hwan Jo, Hyung-Kyu Lim, Sung Jong Yoo, Sang Hyun Ahn
Summary: This study presents a simple electrochemical strategy to fabricate atomic Pt clusters on Au dendrites, resulting in a significantly reduced Pt loading. The prepared Pt/Au/CP sample exhibits high selectivity for formic acid oxidation reaction and maintains stable activity even after cycling tests.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Nicole Smina, Adam Rosen, Lukasz Sztaberek, William Beatrez, Kathryn Kingsbury, Rosario Troia, Yongchen Wang, Jing Zhao, Joshua Schrier, Christopher Koenigsmann
Summary: The study utilizes PtAu alloy nanowires as catalysts to suppress the generation of carbon monoxide by controlling the Au content, thereby improving the oxidation efficiency of small organic molecules.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Xia Qiu, Haifeng Wei, Renjia Li, Yongxin Li
Summary: Bimetallic Au@Pt/Au NPs with triple-layered core-shell structure were successfully prepared and characterized. The single Au@Pt/Au NPs exhibited size-dependent properties for vol-tametric response and electron-transfer rate, and showed excellent electrocatalytic activity, long-term tolerance, and anti-toxicity compared with traditional Pt catalyst. This work provides new insight into conventional electrocatalysis and offers a platform for designing entirely new catalysts at single NPs level.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
S. Hong, H. Kim, J. Kim, S. Y. Kim, S. H. Ahn
Summary: This study reports a facile method for the fabrication of Pt-decorated Au dendrite anodes for direct formic acid fuel cells (DFAFCs). The fabricated Pt@Au-D/CP anode exhibits high current density and maximum power density, demonstrating superior mass activity.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Evgeniia M. Khairullina, Ilya I. Tumkin, Daniil D. Stupin, Alexandra Smikhovskaia, Andrey S. Mereshchenko, Alexey Lihachev, Andrey V. Vasin, Mikhail N. Ryazantsev, Maxim S. Panov
Summary: The influence of Ni microstructure morphology modified with different metals on cell biocompatibility and non-enzymatic glucose detection was investigated. It was found that Ni-Pt electrodes showed better glucose detection performance, while Ni-Au electrodes were more favorable for cell adhesion.
Article
Chemistry, Physical
Antanas Nacys, Dijana Simkunaite, Aldona Balciunaite, Ausrine Zabielaite, Daina Upskuviene, Ramunas Levinas, Vitalija Jasulaitiene, Vitalij Kovalevskij, Birute Simkunaite-Stanyniene, Loreta Tamasauskaite-Tamasiunaite, Eugenijus Norkus
Summary: A Pt-coated Ni layer supported on a Ni foam catalyst (PtNi/Nifoam) was investigated for the electro-oxidation of formic acid (FA) in acidic media. The PtNi/Nifoam catalyst showed approximately 10 times higher catalytic activity compared to bare Pt, especially at low FA concentrations. This enhancement can be attributed to the large surface area provided by Ni foams and the synergistic effects between Pt nanoparticles and Ni-oxy species on the Ni foam surface.
Article
Chemistry, Physical
Jin-Hong Zheng, Jialin Zhang, Guang Li, Jun-Ming Zhang, Bin-Wei Zhang, Yan-Xia Jiang, Shi-Gang Sun
Summary: The PtAu alloy catalyst with atomic Pt sites on the surface shows enhanced activity for formic acid electro-oxidation by changing the reaction mechanism from a dual pathway to a direct pathway. The atomic Pt sites prevent the formation of CO poisoning intermediate and promote the formation of CO2.
MATERIALS TODAY ENERGY
(2022)
Article
Chemistry, Physical
Huichen Xie, Zheng Li, Jian Zhu, Hao Li, Qing Yang, Yang Yang, Can Li
Summary: The deposition of Pt co-catalysts solely on Au nanoparticles has been found to enhance the activity of plasmonic photocatalytic reactions and improve charge separation efficiency.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Huichen Xie, Zheng Li, Jian Zhu, Hao Li, Qing Yang, Yang Yang, Can Li
Summary: Chemical processes induced by surface plasmon resonance have attracted attention in the field of photocatalysis. This study reports the selective deposition of Pt co-catalysts on Au nanoparticles, resulting in improved activity of plasmonic photocatalysts. The results reveal that Pt solely on Au NPs provides higher photocatalytic activity due to enhanced charge separation efficiency.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Tianyu Cao, Ching-Yu Wang, Kai Shen, John M. Vohs, Raymond J. Gorte
Summary: The catalytic properties of Pt and Pd supported on thin-film LaMnO3 were investigated. The results showed that Pt underwent extensive sintering and formed an alloy, while Pd remained well dispersed on LaMnO3. In contrast to Pt, Pd exhibited high activity for CO oxidation at lower temperatures.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Zeyi Guo, Xiuxian Zhao, Guozhu Chen, Zhen Yang, Tongyao Liu, Riming Hu, Xuchuan Jiang
Summary: The catalytic performance of Pt clusters towards formaldehyde oxidation was improved by adjusting the valence of the V element in a VxOy support. The V valence was precisely regulated from V4+ to V5+ through solvothermal synthesis and heat-treatment process. This study provides a strategy to tune the valence of V element in VxOy and offers insights for the study of other multivalent metal oxides in catalytic reactions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Islam M. Al-Akraa, Yaser M. Asal, Ahmad M. Mohammad
Summary: This study aims to mitigate CO poisoning on platinum surfaces during formic acid electro-oxidation in direct formic acid fuel cells. The researchers sequentially modified a glassy carbon electrode with Pt, Au, and CoOx nanostructures, resulting in a catalyst that exhibited a significant enhancement in electrocatalytic activity and stability compared to a Pt/GC catalyst. The observed enhancement was attributed to driving the reaction mechanism towards the desirable direct dehydrogenation pathway and suppressing the poisoning dehydration pathway.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Analytical
Chang Xia, Wei He, Xiao Feng Yang, Peng Fei Gao, Shu Jun Zhen, Yuan Fang Li, Cheng Zhi Huang
Summary: A photogenerated plasmonic hot-electron painting strategy was used to form Au@Pt composite nanoparticles with high catalytic reactivity. Compared to bare Au nanoparticles, Au@Pt nanoparticles exhibited significantly enhanced electrocatalytic activity and could linearly detect H2O2.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Wibawa Hendra Saputera, Tze Hao Tan, Emma C. Lovell, Aditya Rawal, Kondo-Francois Aguey-Zinsou, Donia Friedmann, Rose Amal, Jason A. Scott
Summary: Binary TiO2/SiO2 oxides were synthesized as supports for a Pt catalyst, with varying mole ratios of silica. Increasing the TiO2 : SiO2 ratio led to changes in specific surface area, crystal structure, and defect sites, affecting the catalytic performance for formic acid oxidation under dark conditions and following UV light pre-treatment. The Pt/1TiO(2)-2SiO(2) catalyst exhibited the highest catalytic rate, attributed to the simultaneous presence of PtOads and defect sites following UV-light pre-treatment.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ruixue Feng, Dong Li, Hongzhou Yang, Chengyu Li, Yunxuan Zhao, Geoffrey I. N. Waterhouse, Lu Shang, Tierui Zhang
Summary: In this study, a low-cost Pt atomic layers catalyst was successfully prepared on a CrN substrate via thermal ammonolysis method. The catalyst exhibited excellent activity and durability, making it suitable for various applications.
ADVANCED MATERIALS
(2023)
Article
Electrochemistry
Jaesung Lee, Jae Kwang Yoo, Jandee Kim, Youngku Sohn, Choong Kyun Rhee
ELECTROCHIMICA ACTA
(2018)
Article
Chemistry, Physical
Sungmin Hong, Choong Kyun Rhee, Youngku Sohn
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Multidisciplinary
Hyein Lee, Youngku Sohn, Choong Kyun Rhee
Article
Electrochemistry
Hyein Lee, Young Jun Kim, Youngku Sohn, Choong Kyun Rhee
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2020)
Article
Nanoscience & Nanotechnology
So Jeong Park, Min Hee Joo, Ju Hyun Yang, Sung-Min Hong, Choong Kyun Rhee, Jun-Gill Kang, Youngku Sohn
Summary: Understanding the electrochemical behaviors of Ce(III)/Ce(IV) ions is crucial for the treatment, separation, and recycling of lanthanide and actinide elements. This study successfully demonstrated the electrochemical redox behavior, interconversion, and recovery of Ce(III)/Ce(IV) ions using thio-terpyridine-functionalized Au-modified carbon paper electrodes, providing valuable insights for the recycling and treatment processes of Ln and An ions. The results were fully characterized using various microscopy and spectroscopy techniques, along with density functional theory calculations for the Ce(III) and Ce(IV) ion complexes with thio-terpyridine.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Kihyang Kim, Seoung-Hey Paik, Choong K. Rhee
Summary: Water electrolysis experiments were conducted using multiple cells connected in series to show the effects of different electrode materials and electrolytes. Results showed lower oxygen volumes with stainless steel and graphite anodes in electrolytes containing SO42- and NO3- anions compared to noncorroding Pt electrodes. Additionally, hydrogen volumes were significantly lower when using NO3- anions on catalyzing cathodes compared to noncatalyzing Pt cathodes, indicating side reactions consuming electrons in the electrolysis process.
JOURNAL OF CHEMICAL EDUCATION
(2021)
Article
Chemistry, Physical
Young Jun Kim, Hyein Lee, Hee-Suk Chung, Youngku Sohn, Choong Kyun Rhee
Summary: The study developed composite catalysts with Pt-Bi shells on Au cores and Pt overlayers on the Pt-Bi shells for formic acid oxidation. By controlling the deposition process and manipulating the physicochemical properties of the catalyst, the activity and durability were enhanced significantly.
Article
Chemistry, Multidisciplinary
Hye Ji Jang, So Jeong Park, Ju Hyun Yang, Sung-Min Hong, Choong Kyun Rhee, Youngku Sohn
Summary: By using ZIF-67 as template, bean sprout-like Co-TiO2/Ti nanostructures were successfully synthesized, showing high potential in catalysis.
Article
Materials Science, Multidisciplinary
Min Hee Joo, So Jeong Park, Sung-Min Hong, Choong Kyun Rhee, Youngku Sohn
Summary: In this study, a large dataset of lanthanide (III) ions' electrochemical behaviors and electrodeposition on bare and terpyridine-functionalized Ti sheets was established. The experimental results demonstrated that the electrodeposited lanthanide materials were similar lanthanide complexes, which could be valuable for understanding lanthanide ions' electrochemical behaviors and improving recovery methods.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Seon Young Hwang, Hye Ji Jang, Young Jun Kim, Ju Young Maeng, Go Eun Park, Seo Young Yang, Choong Kyun Rhee, Youngku Sohn
Summary: V-Zn hybrid electrodes were prepared and tested for their electrocatalytic CO2 reduction performance in this study. Different gas and liquid products were obtained under various applied potentials and electrolyte conditions. The production of certain products was enhanced by thermal treatment and photoirradiation. Moreover, the formation of long-chain hydrocarbons was observed under mild conditions.
Article
Chemistry, Physical
Seo Young Yang, Ju Young Maeng, Seon Young Hwang, Go Eun Park, Choong Kyun Rhee, Youngku Sohn
Summary: This study investigates the effects of alterations in surface elemental composition and interfacial electronic structure on formate production by introducing indium and indium-based alloy electrodes for electrochemical CO2 reduction reaction (EC CO2 RR). The results confirm high selectivity and Faradaic efficiency of formate production. XPS analysis reveals significant changes in elemental distribution after the CO2 reduction reaction. These unique findings provide valuable insights for improving and modeling indium-based alloy electrocatalysts for CO2 recycling.
Article
Chemistry, Physical
Ju Young Maeng, Seon Young Hwang, Young Jun Kim, Ilsun Yoon, Chang Woo Myung, Choong Kyun Rhee, Youngku Sohn
Summary: Recent research has shown that cadmium can directly produce C2-7 hydrocarbons through electrochemical CO2 reduction in a K2HPO4/KH2PO4 buffer. Engineering the interface of the Cd surface with other transition metals enhances the production of hydrocarbons. This process mimics the Fischer-Tropsch synthesis, involving surface polymerization reactions that couple carbon atoms together via the insertion of CO and CHx molecules.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Physics, Applied
Seon Young Hwang, Min Hee Joo, Ju Young Maeng, Go Eun Park, Seo Young Yang, Choong Kyun Rhee, Youngku Sohn
Summary: In this paper, the direct hydrothermal growth of MoS2 on a Mo support and its application in the electrochemical CO2 reduction process were reported. Different metal overlayers were introduced on the MoS2 electrode to investigate their effects. The results showed that the Au overlayer enhanced the production of CO, methanol, and formate. Moreover, photoirradiation significantly increased the concentrations of CO and C2H4.
APPLIED SCIENCE AND CONVERGENCE TECHNOLOGY
(2023)
Article
Chemistry, Physical
Go Eun Park, Hye Ji Jang, Ju Young Maeng, Seon Young Hwang, Seo Young Yang, Choong Kyun Rhee, Youngku Sohn
Summary: In this study, a ternary CuNiZn alloy was used as an electrocatalyst for CO2 and CO reductions. Through CO2 adsorption and subsequent reactions, formate, CO, CH4, and C2-7 hydrocarbons were produced. Interestingly, direct CO adsorption followed by hydrogenation reactions resulted in the production of CH4 and C2-7 hydrocarbons. Furthermore, an electrochemically-induced surface reaction similar to Fischer-Tropsch synthesis was discovered, leading to the formation of long-chain hydrocarbons through C-C coupling/polymerization. X-ray photoelectron spectroscopy with Ar+ ion sputtering depth was employed to investigate the interfacial electronic structures and surface elemental composition distributions of Cu, Ni, and Zn, revealing their dependence on applied potential and depth.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
So Jeong Park, Min Hee Joo, Sung-Min Hong, Jun-Gill Kang, Choong Kyun Rhee, Sung Woo Lee, Youngku Sohn
Summary: This study demonstrated the electrochemical behaviors of Eu(III)/Eu(II) ions in NaClO4 electrolyte over bare and terpyridine (Tpy)-functionalized indium tin oxide (ITO) electrodes for the recovery of lanthanide elements. The results showed that Eu(III) ion was recovered as EuSO4 and Tpy-functionalized ITO exhibited a higher recovery performance. Further analysis was conducted to fully examine the physiochemical properties of the recovered materials.
INORGANIC CHEMISTRY FRONTIERS
(2021)
