Article
Nanoscience & Nanotechnology
Zhenzhong Liu, Yi Li, Xiangsong Zhang, Shaosheng Rao, Jinghan Li, Wenlong Wang, Zhongti Sun, Juan Yang
Summary: Optimizing Pt-based catalysts is important for the development of direct ammonia fuel cells. The study found that alloying and surface modulation can significantly enhance the catalytic performance of Pt catalysts. Further surface engineering improves the AOR activity of PtPd nanoparticles. However, short-term stability tests suggest that the activity loss of the catalyst during AOR electrocatalysis may be caused by leaching of Pd atoms, structure transformations, and poisoning effects.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Chang Liu, Xin Ran, Guang Li, Zhi Li, Guanben Du, Long Yang, Lei Li, Qing Qu
Summary: In this study, irregular gravel-like PtPd nanoparticles (g-PtPd-NPs) with rich active sites were successfully synthesized using a novel HBPA. The EOR activity of g-PtPd-NPs was 2.05-fold of commercial Pt/C and higher than control sets and previous reports. The durability of g-PtPd-NPs was also excellent. This study is promotive for the practical application of DEFCs and may enlighten more nanomaterials' synthesis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Electrochemistry
E. Berretti, M. Pagliaro, A. Giaccherini, G. Montegrossi, F. Di Benedetto, G. O. Lepore, F. D'Acapito, F. Vizza, A. Lavacchi
Summary: The research discusses the dissolution of palladium in alkaline direct ethanol fuel cells and direct alkaline formate fuel cells, with results showing an increase in palladium loss under high anodic stresses.
ELECTROCHIMICA ACTA
(2022)
Article
Energy & Fuels
Yaser M. Asal, Ahmad M. Mohammad, Sayed S. Abd El Rehim, Islam M. Al-Akraa
Summary: This investigation demonstrates the excellent catalytic performance of a binary catalyst composed of Pt and Pd simultaneously electrodeposited onto a glassy carbon surface for formic acid electro-oxidation reaction (FAOR) in an alkaline medium. The catalytic enhancement is mainly attributed to the reduction of CO adsorption on the Pt surface.
Article
Materials Science, Multidisciplinary
Zhao-Bin Yan, Fei-Fei Huang, Jun-Qing Shi, Fang Li, Bing Li, Zhen-Guo Guo, Jian-Hui Xie, Jian-Bo He
Summary: This study demonstrates the successful application of bipolar electrochemistry to deposit lateral gradient polypyrrole films as a catalyst matrix for ethanol oxidation. The gradient film shows varying morphologies and a wettability gradient, with superabsorbent property in the middle portion. The excellent catalytic activity is attributed to the outstanding properties of a specific zone along the gradient film in both water absorption and electrical conductivity.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Elham Sadati Behbahani, Abolfath Eshghi, Mehrorang Ghaedi, Mehdi Kheirmand
Summary: In this study, a bimetallic catalyst on CoNiO2 modified rGO was introduced to enhance electrocatalytic behavior, stability and CO poisoning tolerance of PtPd in ethanol oxidation. PtPd/CoNiO2/rGO nanocomposite was found to be an excellent anode electrocatalyst for application in DEFCs, showing significant improvements in electrochemical properties compared to Pt/CoNiO2/rGO and Pd/CoNiO2/rGO.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
T. E. O'Brien, S. Herrera, D. A. Langlois, N. N. Kariuki, H. Yu, M. J. Zachman, D. J. Myers, D. A. Cullen, R. L. Borup, R. Mukundan
Summary: In this study, various low-PtCo MEAs were fabricated and tested using an accelerated stress test, which revealed that porous supports retain more electrochemically-active surface area, leading to higher performance post-AST. However, porous supports also exhibit greater increases in transport resistance, possibly associated with enhanced Co leaching under the AST conditions.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Fei He, Nannan Xia, Yan Zheng, Yixin Zhang, Huailin Fan, Delong Ma, Qianhe Liu, Xun Hu
Summary: By coupling impregnation and electrochemical activation, an efficient, stable, and robust Ru-based electrocatalyst with ultrasmall and well-distributed Ru nanoparticles was developed, showing superior performance compared to Pt-based and Ru-based catalysts.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Yong Tan, Xinyue Xia, Kai Qi, Si Cheng
Summary: The facile synthesis of dendritic PdAgPt nanorings with abundant crystal defects led to enhanced ethanol oxidation reaction (EOR) activity and stability, mainly due to the synergistic effect among trimetallic alloys and the special morphology of the nanorings. The mass activity of PdAgPt nanorings reached 3663 mA mg(Pt+Pd)(-1), surpassing that of Pt/C and Pd/C.
Article
Chemistry, Physical
Xianzhuo Lao, Min Yang, Xiaoli Sheng, Jing Sun, Yiqian Wang, Derui Zheng, Mingyuan Pang, Aiping Fu, Hongliang Li, Peizhi Guo
Summary: PdBi NPs with exceptional electrocatalytic mass activity were synthesized via a one-step oil bath method, with Bi doping showing a positive effect on ethanol oxidation reaction. The density functional theory calculations revealed that the energy barrier of PdBi NPs can be reduced by adjusting the Bi content.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
America Higareda, Fabian Mares, Daniel Bahena, Rodrigo Esparza
Summary: In this study, PtPd core-shell bimetallic nanoparticles were synthesized and supported on carbon for ethanol oxidation reaction. The electrochemical tests showed that PtPd (1 : 0.5)/C catalyst exhibited better catalytic performance than commercial Pt/C.
Article
Thermodynamics
M. M. De Souza, A. L. De Bortoli
Summary: This work analyzes the effect of heating on ethanol crossover in a direct ethanol proton exchange membrane fuel cell, considering species concentration and temperature variation. Numerical simulations show the influence of temperature on the ethanol passage rate through the membrane, and the voltage and power density results are in agreement with experimental data.
APPLIED THERMAL ENGINEERING
(2024)
Article
Chemistry, Multidisciplinary
Juliette W. Strasser, Richard M. Crooks
Summary: In this study, the electrocatalytic properties and stability of 1-2 nm Au, Pd, and AuPd alloy nanoparticles for the ethanol oxidation reaction were systematically investigated. It was found that alloyed AuPd nanoparticles exhibited enhanced activity compared to monometallic Au or Pd nanoparticles. The size and composition of AuPd alloy nanoparticles remained stable during electrocatalysis, while monometallic Au nanoparticles increased in size.
Article
Chemistry, Physical
Jianyu Chen, Min Yang, Mingyuan Pang, Fahui Gao, Peizhi Guo
Summary: The study synthesized alloyed PdxAg1 nanoparticles via a solvothermal synthesis approach and found that the optimized Pd(14)Ag1 NPs exhibited excellent current activity in ethanol oxidation reaction, 3.3 times higher than commercial Pd/C counterpart. Additionally, Pd14Ag1 NPs showed better antitoxicity, lower reaction barrier, and better long-term stability compared to other PdAg NPs and commercial Pd/C catalysts.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Dariusz Lukowiec, Tomasz Wasiak, Dawid Janas, Elzbieta Drzymala, Joanna Depciuch, Tomasz Tarnawski, Jerzy Kubacki, Stanislaw Waclawek, Adrian Radon
Summary: This work presents newly developed catalysts for electrooxidation of ethanol in an alkaline medium. The best catalytic activity was obtained for the catalyst made of Co3-Ni7 decorated with Pd NPs, which exhibited EOR of 8003 mA/mgPd for only 0.86 wt% of Pd loading. The results can be explained by the synergistic effect between the morphology of the bimetallic support and the favorable interaction of oxophilic Co, Ni with catalytic Pd.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)