Article
Engineering, Chemical
Yan Chen, Shao-Chun Wu, Jiao-Jiao Han, Xi Yan, Xiao-Jing Guo, Wan-Zhong Lang
Summary: A Pd-decorated graphene oxide (Pd/GO) membrane was developed by reducing Pd2+ on GO nanosheets, which showed efficient catalytic activity for the reduction of 4-nitrophenol. The catalytic membrane achieved high conversion efficiency due to the proper distribution of Pd nanoparticles in the interlayer space of the GO membrane, allowing sufficient contact between 4-NP molecules and Pd NPs. The high catalytic efficiency of the Pd/GO membrane under high 4-NP concentration and continuous-flow catalysis makes it promising for efficient catalytic processes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Zihan Li, Erran Song, Ruirui Ren, Wuduo Zhao, Tiesheng Li, Minghua Liu, Yangjie Wu
Summary: Pd-Pd/PdO nanoclusters well dispersed on intercalated graphene oxide (GO) exhibited high catalytic activity in the Suzuki coupling reaction. The catalytic mechanism involved heterogeneous catalysis at the interface, and the active centers showed enhanced negative charge to effectively promote the oxidative addition reaction.
Article
Chemistry, Physical
Kun Zhao, Nida Janulaitis, John R. Rumptz, Charles T. Campbell
Summary: This study reports the adsorption heats of Pd vapor deposited onto single-layer graphene(0001) supported on Ni(111) at 100 and 300 K. The results show that the adsorption heat of Pd increases with the size of the particles, with a adhesion energy of 3.5 J/m^2 for the largest Pd particles. The chemical potential of metal atoms in these nanoparticles was also determined.
Article
Chemistry, Physical
Zhengjie Gong, Tao Ma, Feng Liang
Summary: The trimetallic Ni@Cu@Pd nanoparticles with a blackberry-like structure were successfully prepared using a seed mediated growth method, showing high catalytic activity towards organic pollutants in wastewater. These nanoparticles also exhibited efficient catalytic reduction towards various organic dyes and nitrophenols, along with excellent stability and reusability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Jisoo Kim, Jeongah Lim, Ji Dang Kim, Myong Yong Choi, Sunwoo Lee, Hyun Chul Choi
Summary: Pd-graphene quantum dot (Pd-GQD) catalysts were prepared and characterized for their properties and catalytic activity. The study found that Pd-GQD catalyst exhibited higher catalytic activity in the Heck and decarboxylative cross-coupling reactions, and GQD was an effective support material for preparing new catalysts.
Article
Energy & Fuels
Oscar E. Medina, Dahiana Galeano-Caro, Bergit Brattekas, Agustin F. Perez-Cadenas, Francisco Carrasco-Marin, Farid B. Cortes, Camilo A. Franco
Summary: This study evaluates multifunctional nanomaterials for CO2 adsorption and its subsequent transformation into valuable sub-products during the catalytic decomposition of asphaltenes in a steam gasification atmosphere. The best nanoparticle morphology doped with 1% Ni and Pd (C-CeNiPd) shows the highest adsorption capacity and catalytic activity. When steam is injected, CO2 adsorption decreases in all systems. The nanoparticle with the best morphology (C-CeO2) adsorbs about 24.3% of CO2 at 200 degrees C, and the yield increases to 34% after doping with Ni and Pd.
Article
Chemistry, Multidisciplinary
Haiyang Wang, Wenyuan Duan, Ruiyin Zhang, Hao Ma, Cheng Ma, Miaomiao Liang, Yuzhen Zhao, Zongcheng Miao
Summary: Nanorod-supported (Pt-Pd)/CeO2 catalysts were synthesized by dealloying Al91.7Ce8 PtXPd0.3-X (X = 0, 0.075, 0.1, 0.15, 0.2, 0.3) alloy ribbons. SEM and TEM characterization showed that the resulting catalysts had interspersed nanorod structures with nanopores. The (Pt-0.1-Pd-0.2)/CeO2 catalyst calcined at 300 degrees C exhibited the highest activity for CO oxidation at a low temperature of 100 degrees C, attributed to its stable framework structure and collaborative effect of the noble Pt and Pd metals.
Article
Chemistry, Multidisciplinary
Erick Arguello Cruz, Pedro Ducos, Zhaoli Gao, Alan T. Charlie Johnson, Dario Niebieskikwiat
Summary: In this study, the effect of ferromagnetic nickel nanoparticles on the magnetotransport properties of chemical-vapor-deposited graphene was characterized. It was found that these nanoparticles greatly suppressed the zero-field peak of resistivity caused by weak localization and enhanced the high-field magnetoresistance. The interaction between the graphene and the nickel nanoparticles was attributed to a local exchange coupling, which did not affect the intrinsic transport parameters of graphene, indicating that the changes in magnetotransport properties were purely magnetic in origin.
Article
Chemistry, Organic
Carla Garcia-Sanz, Alicia Andreu, Blanca de las Rivas, Ana Jimenez, Alexandra Pop, Cristian Silvestru, Esteban P. Urriolabeitia, Jose M. Palomo
Summary: Different Pd complexes containing orthometallated push-pull oxazolones were successfully incorporated into two genetically engineered modified variants of the GTL enzyme, resulting in significantly increased catalytic activity, selectivity, and fluorescence intensity. Furthermore, the Pd-enzyme conjugates showed remarkable TOF values in the hydrogenation of arenes in aqueous media and demonstrated applicability in site-selective C-H activation reactions under mild conditions.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Article
Chemistry, Physical
Jeremy Audevard, Anas Benyounes, Ruben Castro Contreras, Hicham Abou Oualid, Mohamed Kacimi, Philippe Serp
Summary: Carbon nanotubes are of great interest in catalysis, either as catalyst support or catalyst itself. This study investigates the effect of CNT doping (O, N, S) on the catalytic performance of CNT and Pd/CNT catalysts in the reduction of 4-nitrophenol. It is found that only N-doped CNT is active at room temperature in the presence of NaBH4. Furthermore, the nature of the support influences the location, ratio, and extent of H-spillover of Pd nanoparticles, which directly affect the catalytic activity.
Article
Nanoscience & Nanotechnology
Anna Prytkova, Maria A. Kirsanova, Airat G. Kiiamov, Dmitrii A. Tayurskii, Ayrat M. Dimiev
Summary: In this study, a mixed nickel-palladium nanocomposite was synthesized using wet chemical methods, and compared with monometallic analogues Ni/rGO and Pd/rGO. Advanced instrumental methods revealed the structure of the three nanocomposites. The Ni-Pd/rGO exhibited higher electrocatalytic surface area and catalytic activity, indicating that its catalytic properties mainly stem from palladium.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Andrew G. Walsh, Peng Zhang
Summary: This perspective summarizes the investigation of electronic properties of thiolate-protected bimetallic nanoclusters using density functional theory, square-wave voltammetry, UV-vis spectroscopy, and X-ray photoelectron spectroscopy, and relates this information to their catalytic activities in representative reactions. The importance of the structure-property relationship between the electronic properties and the catalytic performance of thiolate-protected bimetallic nanoclusters is highlighted.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Jiahao Zhuang, Feng He, Xianglin Liu, Pengchao Si, Fangna Gu, Jing Xu, Yu Wang, Guangwen Xu, Ziyi Zhong, Fabing Su
Summary: The in situ synthesis of heterophase Ni nanocrystals on graphene, with a heterostructure of face-centered cubic (fcc) and hexagonal close-packed (hcp) phase, showed greatly improved catalytic activity and reusability in 4-nitrophenol reduction. The apparent rate constant and activity parameter were higher than reported non-noble metal and most noble metal catalysts, demonstrating the potential of creating heterophase metal nanocrystals with enhanced catalytic reactivity.
Article
Chemistry, Multidisciplinary
Jeongeon Kim, Xenia Medvedeva, Jury J. Medvedev, Cheongwon Bae, Juyeong Kim, Anna Klinkova
Summary: Understanding the relationship between structure and performance in nanoscale electrocatalysts for urea electrolysis is important for efficient waste treatment and hydrogen production or CO2 reduction. We investigate the role of lattice strain in Pd-Ni core-shell nanocubes on the dominance of the urea overoxidation pathway.
Article
Chemistry, Physical
Xingju Li, Siquan Feng, Patrick Hemberger, Andras Bodi, Xiangen Song, Qiao Yuan, Jiali Mu, Bin Li, Zheng Jiang, Yunjie Ding
Summary: Heterogeneous single-metal-site catalysts have shown great potential, with this particular Pd catalyst achieving high selectivity towards 1,4-dicarboxylic acid esters (>94%) and high acetylene conversion (>99%) without the need for a sulfonic promoter. The catalyst, supported on activated carbon with iodide ligands, demonstrated good durability and a broad substrate scope.
Article
Engineering, Environmental
Nadaraj Sathishkumar, Shiuan-Yau Wu, Hsin-Tsung Chen
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Electrochemistry
Weicheng Liao, Yi-wei Chen, Yu-Chan Liao, Xin-yi Lin, Shuehlin Yau, Jing-Jong Shyue, Shiuan-Yau Wu, Hsin-Tsung Chen
ELECTROCHIMICA ACTA
(2020)
Article
Chemistry, Applied
Pamela Berilyn So, Hsin-Tsung Chen, Chia-Her Lin
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Engineering, Environmental
Nadaraj Sathishkumar, Shiuan-Yau Wu, Hsin-Tsung Chen
Summary: The research discovered a new 2D material for CO2 capture and separation. By controlling charge densities and external electric fields, the adsorption energy of CO2 can be significantly enhanced, which is important for efficient CO2 capture.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Jyun-Wei Chen, Shiuan-Yau Wu, Hsin-Tsung Chen
Summary: The study investigated the electrocatalytic mechanisms of transition metal atom-doped graphene for the oxygen reduction reaction, revealing different pathways based on the structures of intermediates. The overpotential of ORR was predicted with Pd@sv-graphene showing the best activity among the catalysts.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Min-Hsuan Fang, Shiuan-Yau Wu, Yu-Hsiang Chang, Manmath Narwane, Bo-Hao Chen, Wei-Ling Liu, Darwin Kurniawan, Wei-Hung Chiang, Chia-Her Lin, Yu-Chun Chuang, I-Jui Hsu, Hsin-Tsung Chen, Tsai-Te Lu
Summary: The study explored the use of ZIF67-derived fcc-Co@porous carbon nano/microparticles as a catalyst for the hydrolytic dehydrogenation of ammonia borane, with insights into the reaction mechanism provided by kinetic and computational studies. Experimental evidence supported Co-mediated activation of AB and formation of a Co-H intermediate, suggesting potential applications in the generation of H-2(g) for various purposes, including the treatment of inflammatory diseases, with further investigations warranted.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Chen-Wei Chan, Shiuan-Yau Wu, Hsin-Tsung Chen
Summary: The study demonstrates that the adsorption ability of hydrogen on heteroatom (B, N)-doped porous graphene is influenced by the porosity, heteroatom dopant, and external positive charge. Adsorption energy can be significantly increased by applying a positive charge, allowing for a spontaneous and reversible adsorption/desorption process with easy control. The gravimetric density is predicted to be 10.8 wt % on positively charged B-doped porous graphene.
Article
Chemistry, Physical
Nadaraj Sathishkumar, Shiuan-Yau Wu, Hsin-Tsung Chen
Summary: In this study, the CO2 reduction on the Ru(0001) surface using H-2 is systematically investigated through DFT calculations and micro-kinetic modeling. The effects of adsorbate-substrate interactions, water solvation, and thermodynamics on reaction rate and selectivity are analyzed. Thermodynamic descriptors are proposed to represent the effectiveness of CO selectivity on Ru catalysts. The solvation effect is examined using a water bilayer model, and the efficiency of the ruthenium catalyst is expressed by turnover frequencies (TOFs).
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Nadaraj Sathishkumar, Shiuan-Yau Wu, Hsin-Tsung Chen
Summary: This study systematically investigates the electrocatalytic activity and NH3 selectivity of a single-atom catalyst supported on graphitic carbon nitride for nitrate reduction reaction. The results reveal promising catalysts for achieving nitrate to ammonia conversion with stability, excellent activity, high selectivity, and low limiting potential.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Shiuan-Yau Wu, Hsin-Tsung Chen
Summary: The electrocatalytic formic acid oxidation (FAO) on graphene supported Pd-Ni catalysts was investigated using periodic density functional theory calculations. The role of Ni content in different Pd-Ni atomic ratio and the hydrogen coverage effect were elucidated.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Imran Khan, Salman Khan, Shiuan-Yau Wu, Hsin-Tsung Chen, Amir Zada, Linlin Liu, Ahmed Ismail, Sharafat Ali, Fazal Raziq, Mustafa Haider, Javid Khan, Sami Ullah, Shin-pon Ju, Shiliang Wang
Summary: By introducing boron dopants and nitrogen defects in graphitic carbon nitride and using ultrathin Co phthalocyanine, researchers have achieved highly efficient photocatalytic CO2 activation for solar-light-driven CO2 reduction reactions.
Article
Chemistry, Multidisciplinary
Kai-Yang Chen, Shiuan-Yau Wu, Hsin-Tsung Chen
Article
Multidisciplinary Sciences
Hasil Aman, Naghmana Rashid, Zaman Ashraf, Aamna Bibi, Hsin-Tsung Chen, Nadaraj Sathishkumar