Article
Chemistry, Physical
Linghan Lan, Jun Li, Yang Yang, Lu Zhang, Liang Zhang, Qian Fu, Xun Zhu, Qiang Liao
Summary: This study successfully increased the density of active sites for oxygen reduction reaction (ORR) by controlling the interfacial energy between the carbon support and heteroatomic precursor (FePc)-containing solution. The findings resulted in higher catalytic activity and power output compared to platinum-based catalysts, indicating the potential for the development of highly active carbon-based catalysts for fuel cell applications.
Article
Chemistry, Physical
Zhipeng Liu, Jinling Xue, Yinshi Li
Summary: A structurally controlled 3D flower-like PdCu nanosheet catalyst is synthesized and shows higher mass activity for anodic formate oxidation reaction and a positive shift half-wave potential for cathodic oxygen reduction reaction compared to commercial Pd/C and Pt/C catalysts. This work provides a potential strategy to improve the catalytic performance of non-Pt-based nanocatalysts.
Article
Engineering, Chemical
Fahimah Abd Lah Halim, Takuya Tsujiguchi, Yugo Osaka, Akio Kodama
Summary: This study investigated the performance of non-precious metal catalysts in alkaline medium for direct formate fuel cells. The results showed that the non-precious metal catalysts exhibited higher formate tolerance than the commercial Pt/C catalyst. Despite lower ORR activity, the DFFC with non-precious metal catalysts showed higher maximum power density in high formate concentration solutions.
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
(2021)
Article
Energy & Fuels
Jin-Cherng Shyu, Yun-Lin Wang
Summary: The experimental results show that reducing the Nafion ionomer content can enhance the open circuit voltage and maximum power density of direct formate fuel cells (DFFCs), while feeding the DFFCs with anolyte containing 3-M HCOOK and 3-M KOH yields the highest cell output.
ENERGY SCIENCE & ENGINEERING
(2021)
Article
Chemistry, Organic
O. P. Papeta, S. I. Sulima, V. G. Bakun, I. N. Zubkov, A. N. Saliev, R. E. Yakovenko
Summary: Catalysts synthesized from a composite mixture showed good activity and selectivity in the Fischer-Tropsch synthesis reaction. The content of zeolite component is critical to the catalyst's activity and selectivity, while the ratio between active components correlates with the composition and properties of the products.
PETROLEUM CHEMISTRY
(2023)
Article
Chemistry, Physical
M. Ahsanul Haque, A. Bakar Sulong, L. Kee Shyuan, E. Herianto Majlan, T. Husaini, R. Emilia Rosli
Summary: The polymer/MWCNT nanocomposites synthesized in this study exhibited higher specific surface areas compared to the pristine MWCNT. The MEAs fabricated using hot pressing method showed a maximum power density of 112.10 mW/cm(2) in a single cell. The synthesized catalyst-supporting materials enhanced electrochemical activity and stability, achieving the main objective of this study.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Xiangyu Su, Zhefei Pan, Liang An, Yaoguang Yu
Summary: This work develops a one-dimensional mathematical model of direct formate fuel cells, incorporating mass/charge transport and electrochemical reactions. The model is able to predict fuel cell performance and provide insights into the characteristics of direct formate fuel cells, with good agreement with experimental data. Various factors affecting fuel cell performance are examined using the model.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Multidisciplinary
Qiao Lan, Dingding Ye, Xun Zhu, Rong Chen, Qiang Liao, Tong Zhang, Yuan Zhou
Summary: A direct formate microfluidic fuel cell (DFMFC) with a catalyst-free cathode and sodium persulfate as the oxidant has been proposed to achieve high performance at low cost. By optimizing the flow rate and concentration of the reactants, the DFMFC achieved a high peak power density and current density, while maintaining stable operation during constant voltage discharge. This study demonstrates that a catalyst-free cathode with persulfate as the oxidant is a feasible approach to simultaneously achieve superior cell performance and low cost for microfluidic fuel cells.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Dan Wu, Jie Hao, Weilin Wang, Yan Yu, Xian-Zhu Fu, Jing-Li Luo
Summary: An efficient strategy was developed for concurrent H-2 production and refining oxidative alcohols into value-added formate using self-supported Ni2P-CoP bifunctional electrocatalysts. This method enabled high-efficiency hydrogen production under low voltage conditions and demonstrated excellent durability.
Article
Energy & Fuels
Jungyeon Ji, Seon-Min Jeon, Yongjin Chung, Yongchai Kwon
Summary: This article introduces a direct liquid fuel cell and a membraneless fuel cell that use buckypaper and vitamin B-12 as the anode. The results show that this system has high catalytic activity and maximum power density, making it suitable for implantable sensors and stimulation devices.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Yulu Liu, Chenghua Xu, Wanglai Cen, Hao Li
Summary: First-principle calculations and catalytic modeling enable the design of fuel combustion catalysts, reducing the need for trial-and-error experiments. This study discusses a design strategy for bifunctional catalysts, where different reactants occupy different sites on the surface, leading to a poisoning-free active interface.
Article
Engineering, Chemical
Xiangzhao Hu, Junjie Sun, Wanzhen Zheng, Sixing Zheng, Yu Xie, Xiang Gao, Bin Yang, Zhongjian Li, Lecheng Lei, Yang Hou
Summary: This study reports a novel hybrid CO2ER electrocatalyst that achieves efficient formate production and stable catalytic performance by supporting layered Bi2O3 and Bi2S3 on nanocarbon. The strong interfacial interactions between nanocarbon and Bi2O3/Bi2S3 are identified as the key factor for the enhanced CO2ER performance.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Thermodynamics
Jin-Cherng Shyu, Hao-Ping Lyu
Summary: Passive anion-exchange membrane direct formate fuel cells (DFFCs) were developed and characterized. Different ratios of Nafion and chitosan were used as binders in the anode catalyst ink. The results showed that decreasing the binder content increased the anode's electrochemically active surface area (ECSA). The highest maximum power densities were achieved by the 15 wt% Nafion-based and 5 wt% chitosan-based passive AEM DFFCs. The current output of the 5 wt% chitosan-based DFFCs at 0.4 V for 10 hr demonstrated that more concentrated fuel resulted in more stable current.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Xiqiong Guo, Fangying Yuan, Peixi Wang, Runqiu Li, Hui Zheng
Summary: In this study, a nanocomposite composed of CoFe2 alloy functionalized few-layer graphene sheets (CoFe2/FLGs) was successfully fabricated by using ferric nitrate, cobalt nitrate, and glucose as precursors. The measurements in this research indicate that the nanosized CoFe2 alloy particles are evenly distributed within the FLGs and possess remarkable magnetism. Electrochemical measurements demonstrate that the CoFe2/FLGs exhibit high onset potential (0.901 V), follow a four-electron pathway, show low Tafel slope (77.21 mV/dec), possess low charge-transfer resistance (around 72 Omega), and exhibit strong methanol tolerance. As a result, the resulting CoFe2/FLGs nanocomposite demonstrates excellent electrocatalytic performance and recyclability for the oxygen reduction reaction, making it a promising catalyst for fuel cells.
Article
Chemistry, Multidisciplinary
Mohammad Taghi Tourchi Moghadam, Majid Seifi, Mohammad Bagher Askari, Sadegh Azizi
Summary: In this study, the addition of Fe3O4-decorated multi-wall carbon nanotubes to zinc oxide structure improved the quantity of active oxidation sites and the conductivity of the catalyst, resulting in enhanced electro-catalytic ability and stability in methanol and ethanol oxidation processes. This introduces promising potential for ZnO-based materials as alcohol oxidation catalysts.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Zi-Ye Liu, Qian-Yu Wang, Ji-Ming Hu
Summary: In this study, a layered carbon dot composite catalyst (NiFe LDH@CDs) was prepared using a one-step coprecipitation method, without the need for heating or hydrothermal treatment. The CD-functionalized catalyst facilitated rapid charge transfer and accelerated the oxygen evolution reaction. Additionally, the heterojunction structure formed between NiFe LDH and CDs efficiently suppressed photoelectron-hole recombination.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Rohit Kumar, Ankit Kumar Srivastava, Palaniyappan Nagarasu, Vedichi Madhu, Ekambaram Balaraman
Summary: We designed and synthesized a NN-CoII bidentate complex and used it for the amination of alcohols under mild and solventless conditions. The complex exhibited good reactivity towards both primary and sterically hindered secondary alcohols, providing high yields of amines. The pyrazole moiety in the ligand played a crucial role in the reaction. Furthermore, we demonstrated the reusability of the complex as a homogeneous cobalt catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Shivanand Chettri, Liang-Ting Wu, Sagarmani Rasaily, Debesh Sharma, Bikram Gurung, Rajani Dewan, Sudarsan Tamang, Jyh-Chiang Jiang, Anand Pariyar
Summary: Replicating the enzymatic surface microenvironment in vitro is challenging, but constructing an analogous model could facilitate our understanding of surface effects and aid in developing an efficient bioinspired catalytic system. In this study, five unique Cu2O morphologies were generated, and the surface morphology variations were found to be a consequence of differences in the exposure of low-index facets. The reactivity of Cu2O was found to be influenced by the proportion of {110} planes, with r-Cu2O exhibiting the highest reactivity.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Yong Tang, Jianhao Qiu, Dingliang Dai, Guanglu Xia, Lu Zhang, Jianfeng Yao
Summary: Defect engineering has been shown to improve the photocatalytic performance. This study investigated the use of defect-rich UiO-66-NH2 wrapped by ZnIn2S4 as a catalyst for photocatalytic H2O2 production. The defects in UiO-66-NH2 enhanced O-2 adsorption and charge separation, leading to higher H2O2 yield. The insights from this work can advance the research in defect engineering of MOFs and photocatalytic H2O2 synthesis.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Ruiyang Qu, Shuxin Mao, Jana Weiss, Vita A. Kondratenko, Evgenii V. Kondratenko, Stephan Bartling, Haifeng Qi, Annette-Enrica Surkus, Kathrin Junge, Matthias Beller
Summary: The hydrogenation of amides, a challenging reaction usually performed at high temperatures, has been achieved under milder conditions using a new Pt-MoOx/TiO2 catalyst. This catalyst system enables the selective hydrogenation of various amides and imides.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Xiaoran Niu, Ao Wang, Lei Tong, Lei Wang, Yuan Kong, Chenliang Su, Hai-Wei Liang
Summary: This study introduces a novel intermetallic PdCu3 catalyst supported on defective nanodiamond-graphene (ND@G), which exhibits high selectivity (95%) and remarkable activity (turnover frequency: 2940 h(-1)), six times higher than that of the commercial Lindlar catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Review
Chemistry, Physical
Zhiyuan Zheng, Yiming Yue, Hongying Zhuo, Qinggang Liu, Yanqiang Huang
Summary: This review presents the recent research advances on single-atom catalysis for deep reduction of CO2. Detailed introductions and summaries were classified into three categories based on proton-coupled multi-electron transfer approaches: strengthening metal-support interaction, rational design and regulation of coordination environment, and development of SACs with multi-atom active sites. The challenges and future research directions in the field of SACs for CO2 reduction are also proposed.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
Shiv Kumar, Paramita Datta, Anup Bhunia, Swadhin K. Mandal
Summary: This article reports a transition-metal-free process for in situ denitrogenation of tosylhydrazones, resulting in the production of various sulfones. The authors used a phenalenyl-based odd alternant hydrocarbon as a photoredox catalyst, which acted as a potent oxidant to facilitate the denitrogenation reaction. The method showed wide functional-group tolerance and high yields, making it suitable for late-stage modification of natural products.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
L. A. Luque-Alvarez, J. Gonzalez-Arias, F. Romero-Sarria, T. R. Reina, L. F. Bobadilla, J. A. Odriozola
Summary: Currently, the production of acetic acid through the carbonylation reaction of methanol has limitations, leading to the exploration of alternative methods using heterogeneous catalysts. This study investigates the methanol carbonylation reaction over a Cu-H-MOR catalyst and proposes a reaction mechanism based on the catalytic behavior and performance of the catalyst. The results provide insights into the reaction mechanism and the involvement of acid and redox centers.
CATALYSIS SCIENCE & TECHNOLOGY
(2024)