Article
Chemistry, Physical
Mingxin Wei, Lianjin Chen, Xiaosen Wang, Aimei Zhu, Qiugen Zhang, Qinglin Liu
Summary: In this study, tubular palladium-based catalysts with abundant lattice defect sites were prepared using Cu nano-wires as sacrificial templates. The Pd-based catalysts exhibited high activity and high anti-poisoning ability, and could be recycled, which is of great significance for oxidation reactions, such as incomplete oxidation of ethanol.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Silvio Dantas, Katie Cychosz Struckhoff, Matthias Thommes, Alexander V. Neimark
Summary: The study introduces a new method for evaluating pore structures in carbon materials, using high-pressure CO2 adsorption isotherms to determine the pore size distribution in both micro- and mesopores. By utilizing Monte Carlo simulations and meso-canonical ensemble methods, capillary condensation transitions in mesopores were successfully predicted, demonstrating the feasibility of the technique in micro-mesoporous carbon materials.
Article
Chemistry, Applied
Alberto Rodriguez-Gomez, Enrico Lepre, Luz Sanchez-Silva, Nieves Lopez-Salas, Ana Raquel de la Osa
Summary: In this study, three nitrogen-doped carbonaceous materials with different atomic C/N ratios and porous networks were synthesized as supports for PtRu electrocatalysts for ethanol oxidation reaction. PtRu/CNZ showed the best electrochemical performance due to a suitable compromise between particle sizes, degree of alloy, textural properties, and elemental composition. The findings suggest that PtRu/NCs can outperform commercial catalysts and provide stable electrocatalytic activity for clean hydrogen production.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yufeng Zhang, Jinjie Fang, Lipeng Zhang, Dong Wei, Wei Zhu, Zhongbin Zhuang
Summary: Amorphous Pd-P metal-metalloid alloy nanoparticles exhibit higher electrochemical performance in ethanol oxidation reaction compared to crystalline Pd nanoparticles, thanks to abundant defective coordination unsaturated sites and P alloying, which enhance the adsorption of OH.
CHEMICAL COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Qi Li, Xiangsi Liu, Ying Tao, Jianxing Huang, Jun Zhang, Chunpeng Yang, Yibo Zhang, Siwei Zhang, Yiran Jia, Qiaowei Lin, Yuxuan Xiang, Jun Cheng, Wei Lv, Feiyu Kang, Yong Yang, Quan-Hong Yang
Summary: This study proposes an ideal configuration of practical carbon anodes for high-energy sodium-ion batteries, featuring sieving carbons with highly tunable nanopores and tightened pore entrances. The resulting anodes exhibit high-energy and extensible low-potential plateaus, potentially accelerating the commercialization of sodium-ion batteries.
NATIONAL SCIENCE REVIEW
(2022)
Review
Chemistry, Physical
Chen Li, Ke Wang, Dong Xie
Summary: This review paper summarizes strategies to improve the efficiency of ethanol electrooxidation using Pt- or Pd-based electro-catalysts, including chemical doping, alloying with other metals, mixing with metal oxides, and morphology control. The ultimate goal is to design high performance electrocatalysts to promote the commercialization of direct ethanol fuel cells.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Lian Ying Zhang, Xiaomin Meng, Wenlin Zhang, Tiantian Zeng, Weiyong Yuan, Zhiliang Zhao
Summary: In this study, PdW metallene-constructed sandwich-like nanosheets were prepared via a wet-chemical method, showing excellent electrocatalytic activity and durability in direct formic acid fuel cells. The enhanced catalytic activity is attributed to the unique nanosheet structure providing appropriate distances for bridge adsorption, while the improved durability is due to modification of the Pd electronic structure by the introduction of W. This work offers a low-Pd-loading, highly active, and stable bifunctional catalyst for direct formic acid fuel cells.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Electrochemistry
Andile Mkhohlakali, Xolile Fuku, Mmalewane Modibedi, Lindiwe Khotseng, Mkhulu Mathe
Summary: In this study, BiTePd nanofilm was successfully synthesized using electrochemical atomic layer deposition (E-ALD), and its surface morphology and structure composition were characterized by SEM-EDS, AFM, and XRD. The results showed that BiTePd nanofilm exhibited excellent performance in terms of electrochemical activity, stability, and electron transfer kinetics. Therefore, it has great potential as an active electrocatalyst for direct ethanol fuel cells.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Kyeong-Ho Kim, Gustavo M. M. Hobold, Katherine J. J. Steinberg, Betar M. M. Gallant
Summary: In the anodic ethanol oxidation reaction for direct ethanol fuel cells, the coverage of hydroxide plays a significant role in determining the efficiency and durability of complete ethanol oxidation. By manipulating the local pH changes near the electrocatalyst surface, the researchers were able to optimize the hydroxide coverage and improve the performance of the catalyst. They achieved this by fine-tuning the electrode porosity using Pt1-x Rh x hollow sphere electrocatalysts, resulting in higher activity, Faradaic efficiency, and durability.
Article
Chemistry, Physical
J. Jagiello, A. Chojnacka, S. E. M. Pourhosseini, Z. Wang, F. Beguin
Summary: Hierarchically micro/mesoporous carbons obtained by template carbonization were studied using nitrogen adsorption/desorption, revealing unexpected artifacts when calculating pore size distribution with the 2D-HS-SLIT model. By applying a dual shape pore model, a better fit with experimental results was achieved, showing narrower mesopore peaks and eliminating previous artifacts. Additionally, the cumulative surface area values were significantly larger than those obtained with the 2D-HS-SLIT model due to the larger surface area of cylindrical pores compared to slit-shaped mesopores.
Article
Chemistry, Physical
Likang Yang, Fahui Gao, Luyao Xu, Bei Fu, Yaying Zheng, Peizhi Guo
Summary: The development of direct ethanol fuel cells is important for addressing global climate change. Researchers have found that controlling the alloying degree and lattice expansion of PdAg catalysts can optimize their electrocatalytic performance. PdAg nano-dendritic alloys exhibit volcano-type behavior and show the highest peak current density for ethanol oxidation reaction.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Alberto Rodriguez-Gomez, Enrico Lepre, Fernando Dorado, Luz Sanchez-Silva, Nieves Lopez-Salas, Ana Raquel de la Osa
Summary: In this study, adenine-derived noble carbons were used as anodic supports for PtRu nanoparticles to enhance the catalytic activity of ethanol oxidation reaction (EOR). Three noble carbons (ANZ, ALZ, and ALK) were synthesized, and ANZ showed the highest catalytic activity due to its higher dispersion degree and lower alloying percentage. PtRu/ANZ exhibited 2.4 and 1.6 times larger mass activity than commercial PtRu/C in EOR and scaled-up proton exchange membrane cell experiments, respectively. These findings indicate the potential of nitrogen-containing supports for EOR electrocatalysts.
MATERIALS TODAY ENERGY
(2023)
Article
Chemistry, Physical
Jinfa Chang, Guanzhi Wang, Cheng Li, Yaqi He, Yuanmin Zhu, Wei Zhang, Muhammad Sajid, Abdelkader Kara, Meng Gu, Yang Yang
Summary: A PtPd HEA catalyst with a PtPd-rich surface and super-low platinum group metals loading was developed, achieving a maximum power density of 0.72 W cm -2 and durable operation for 1,200 h in DEFCs. This work has important implications for the development of nanostructured alloys for renewable energy applications.
Article
Energy & Fuels
Simin Moradmand, Jessica A. Allen, Scott W. Donne
Summary: This study investigates the impact of kaolin on the thermal and electrochemical behavior of the molten ternary carbonate eutectic in the direct carbon fuel cell. The results show that kaolin can significantly decrease the activation energy for eutectic melting and enhance the electro-oxidation of carbon in the electrolyte.
Article
Chemistry, Physical
M. H. Rodriguez-Barajas, A. Gutierrez, A. Martinez-Lazaro, F. I. Espinosa-Lagunes, N. Rey-Raap, A. Arenillas, J. Ledesma-Garcia, L. G. Arriaga
Summary: This study presents a simple method using microwave-assisted sol-gel process to obtain various PdCo aerogels and explores their physicochemical properties and applications in ethanol oxidation reaction. The results show that PdCo [80:20] and PdCo [50:50] aerogels exhibit excellent electrocatalytic performance. PdCo [80:20] aerogel achieves the highest power density and current density in the acid-alkaline hybrid microfluidic fuel cell.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
