Article
Chemistry, Physical
Yasuhiro Shu, Keisuke Ota, Koji Miyake, Yoshiaki Uchida, Shunsuke Tanaka, Norikazu Nishiyama
Summary: Proton-exchange-membrane fuel cells (PEMFCs) are sustainable, renewable, efficient, and eco-friendly energy conversion systems, but their performance is hindered by sluggish oxygen reduction reactions. Recent efforts have been focused on exploring transition metal and hetero-atom doped carbon materials, with Co-N doped meso/microporous carbon catalysts showing outstanding oxygen reduction activity in an alkaline medium. This catalyst exhibits high activity, long-term stability, and methanol tolerance, making it a promising non-precious metal-based ORR catalyst for PEMFCs.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Pengshuai Wang, Wenting Ma, Song Xue, Liang Wang, Yuan Chen, Yilei Wang
Summary: The effect of electrode material's surface morphology on capacitive deionization (CDI) performance was discussed by designing hierarchical carbon microspheres (HCMs) with vertically aligned nanosheets. The active HCMs (A-HCMs) exhibit high specific surface area and capacitance, as well as a good deionization capacity for NaCl, with over 50 stable deionization/regeneration cycles achievable at an initial concentration of 400 mg/L.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Wei Zhang, Supeng Pei, Kangwei Xu, Zhiyue Han, Jialu Ma, Yingge Zhang, Guipeng Liu, Xiaojun Xu
Summary: Transition metal and nitrogen codoped carbon sheet catalysts have been developed as promising candidates to replace noble metal-based oxygen reduction reaction (ORR) catalysts. In this study, cobalt and nitrogen codoped carbon sheet catalysts were successfully prepared and exhibited excellent ORR performance, including high onset and half-wave potentials, as well as good durability and methanol tolerance.
Article
Energy & Fuels
Jianting Liu, Liling Wei, Huiqiang Wang, Gongjia Lan, Haijun Yang, Jianquan Shen
Summary: The nitrogen self-doped porous activated carbons synthesized from silk gel exhibit outstanding oxygen reduction reaction electrocatalytic activities due to their high specific surface area, large pore volume, high degree of graphitization, and presence of nitrogen active sites. These characteristics make them suitable for efficient electron transfer and enable more active sites to participate in the process.
Article
Engineering, Environmental
Shuming Li, Yuzhe Wang, Yu Ding, Yu He, Yuyang Zhang, Shuni Li, Jing Zhang, Yu Chen
Summary: The synthesis of carbon-based metal-free catalysts with high electroactivity for the oxygen reduction reaction is a challenge, but the hollow N-doped carbon nanoflowers synthesized in this study show promising results in terms of activity, stability, and methanol tolerance compared to benchmark catalysts like Pt/C.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yanyun Zhang, Wenhao Yu, Hao Zhang, Yue Shi, Jiawei Zhu, Tiantian Wang, Yuyao Sun, Tianrong Zhan, Jianping Lai, Lei Wang
Summary: This study discovers that superaerophobic nitrogen-doped carbon material can promote the rapid release of H2 and provide desorption sites for the hydrogen spillover process, making it a potential catalyst support. Through comprehensive electrochemical tests, Pt@N-1-CNC catalyst is proven to have superior hydrogen evolution performance in a proton exchange membrane electrolyzer.
Article
Environmental Sciences
Yegeng Sun, Wei Zhang, Qing Wang, Ning Han, Avelino Nunez-Delgado, Yue Cao, Weimeng Si, Fagang Wang, Shaomin Liu
Summary: A mesoporous carbon derived from beancurd was used as a support for Au@Pd@Pt core-shell catalysts, showing higher ORR activity, specific, and mass activities compared to commercial Pt/C catalyst. The sample exhibited excellent durability after 20000 cycles of rapid testing, indicating promising potential for environmental applications.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Yaqi Chen, Lifen Tong, Guo Lin, Weixi Zhang, Qinglin Zeng, Xiaobo Liu
Summary: Advanced carbon materials with tunable priority and composition, such as nitrogen self-doped porous carbon materials (NPCM), have shown promising potential as electrode materials for high-performance supercapacitors. The NPCM exhibited moderate specific surface area and nitrogen content, leading to a great specific capacitance attributed to appropriate pore structure and functional groups derived from heteroatom doping.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Chengwei Deng, Liwei Pan, Feng Ji, Wei Du, Jing Zhang, Yi Sun, Hexiang Zhong
Summary: A nitrogen-doped ordered hierarchically porous carbon (NHMC) catalyst was successfully synthesized using a hybrid dual-template strategy, showing high activity, stability, and methanol tolerance, which provides inspiration for the preparation of low-cost Pt-free catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
Zhong Dai, Peng-Gang Ren, Zhengzheng Guo, Wenwei He, Xin Hou, Yanling Jin
Summary: The in-situ N-O-S co-doped activated carbon materials prepared from locust pests via self-template method exhibit a variety of pore structures and large specific surface area, showing high specific capacitance and cycling stability. The electrode material prepared maintains a high capacitance retention even as the current density increases, showcasing potential for high-performance SCs applications.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Xinfu He, Liaobo Chang, Hongju Wu, Guoyang Liu, Yating Zhang, Anning Zhou
Summary: The low conductivity and porosity of ZIF-67-based catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are addressed in this research. A highly active bifunctional catalyst, F-N/FeCoNC900, with a three-dimensional interconnected porous structure and high electrical conductivity, was successfully prepared by co-doping Fe, F, and N on the precursor ZIF-67. F-N/FeCoNC900 exhibits superior ORR and OER performance compared to commercially available Pt/C catalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Cristian Daniel Jaimes-Paez, Francisco Jose Garcia-Mateos, Ramiro Ruiz-Rosas, Jose Rodriguez-Mirasol, Tomas Cordero, Emilia Morallon, Diego Cazorla-Amoros
Summary: The aim of this study is to determine the Oxygen Reduction Reaction (ORR) activity of self-standing electrospun carbon fiber catalysts obtained from different metallic salt/lignin solutions. Carbon fibers were prepared by electrospinning technique with metallic nanoparticles (Co, Fe, Pt, and Pd) embedded in organosolv lignin. The presence of metals resulted in increased porosity during carbonization, leading to improved accessibility of the electrolyte to active sites. Carbon fibers loaded with 8 wt% palladium showed the best ORR activity with superior dispersion and balanced pore size distribution.
Article
Chemistry, Physical
Jiahuan Xu, Beichen Xue, Chunlin Xia, Chao Liu, Ming Li, Rui Xiao
Summary: Nitrogen-doped hierarchical porous carbons were synthesized using bio-oil and urea as carbon and nitrogen sources, respectively, based on a MgO template approach. The resulting carbons exhibited a micro-/meso-/macroporous structure, high specific surface area, and abundant Graphitic and Pyridinic nitrogen species, which led to excellent catalytic performance for the oxygen reduction reaction (ORR). The assembled Zn-air battery showed a maximum power density of 239.36 mW cm-2 and consistent discharging stability. This work demonstrated the great potential of bio-oil as a sustainable and low-cost precursor for the production of efficient carbon-based ORR catalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yuanhua Xiao, Ziqing Wen, Dangcheng Su, Shaoming Fang, Xuezhao Wang
Summary: Two-dimensional layered carbon, with high surface area and conductivity, is a promising support for constructing transition metal-nitrogen-doped carbon catalysts. The use of self-sacrificial templates, such as layered graphite phase carbon nitride (g-C3N4), allows for the construction of layered porous structures and enhanced N configuration. The Fe3N-N-C-50 catalyst derived from g-C3N4 exhibits better electrochemical performance than Pt/C-20%, and the Fe3N-N-C-50-based zinc-air battery shows excellent discharging performance and durability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Zijian Ding, Mingxin Cai, Xiangchao Hui
Summary: This study investigates the mechanism and tolerance of V-CNT(10, 0) and Mn-2-C-60 in ORR, revealing their higher tolerance against CO poisoning and lower over potential compared to Palladium catalysts in fuel cell. Mn-2-C-60 is shown to have lower CO poisoning and potential for adsorbing CO, while V-CNT(10, 0) exhibits lower over potential for ORR than Mn-2-C-60.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Zhongyu Qiu, Xiaowen Ge, Naibao Huang, Shixian Zhou, Junjie Zhang, Jiaping Xuan
Summary: Polyethylene oxide (PEO)-polypropylene oxide (PPO)-polyethylene oxide block copolymer with different molecular weights were utilized as precursors to prepare Hollow-Derivatives carbon material for electrocatalysis. Characterization of the prepared catalysts was conducted using various techniques such as Raman spectroscopy, X-ray diffraction, nitrogen adsorption and desorption test, HR-TEM, and HR-SEM. The study showed that with increasing molecular weight, the morphology of the carbon material changed from block to hollow and spherical, with the sample C-12600 demonstrating excellent electrocatalytic performance and stability in O-2 saturated alkaline electrolyte.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Mingxing Guo, Jiaqi Liu, Yingqi Yuan, Zhe Zhang, Shuhui Yin, Jing Leng, Naibao Huang
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2020)
Article
Nanoscience & Nanotechnology
Yin Sun, Junjie Zhang, Sen Liu, Xiannian Sun, Naibao Huang
Summary: In this study, 1D porous CoO nanowires were successfully synthesized using a microwave-assisted hydrothermal approach, resulting in improved electrochemical properties compared to samples prepared without microwave assistance. This included enhanced specific capacitance, strengthened rate performance, and reduced charge transfer resistance, showcasing the benefits of microwave assistance in the synthesis of advanced supercapacitor materials.
Article
Chemistry, Multidisciplinary
Xiaomei Du, Liu Yang, Yingqing Fu, Sen Liu, Naibao Huang, Shusen Wang
Summary: The spinel NiMn2O4 was directly grown on 3D nickel foam using a simple microwave-assisted hydrothermal and annealing process at different temperatures, showing great potential as a binder-free electrode for high-performance supercapacitors. The NiMn2O4 prepared at 450 degrees Celsius exhibited the highest specific capacitance and excellent cycle stability among all samples, indicating its superior electrochemical performance for supercapacitor applications.
Article
Chemistry, Multidisciplinary
Jun J. Zhang, Yin Sun, Li K. Guo, Xian N. Sun, Nai B. Huang
Summary: In this study, a biomass-derived nano-carbon ORR catalyst with a large N atoms content was synthesized using high-protein yuba as a precursor. Among the samples tested, Y-850 showed the highest electrocatalytic activity for ORR, attributable to its high N content and especially high graphitic-N content. Ball-milling was also found to enhance the limited current density of ORR when applied before pyrolysis.
Article
Chemistry, Physical
Yin Sun, Sen Liu, Naibao Huang, Xinyu Wang, Juan Liu, Jiapeng Bi, Junjie Zhang, Likui Guo, Xiannian Sun
Summary: Crystal plane engineering and defect engineering are effective approaches to improve the electrochemical performance of nanomaterials. In this study, carambola-like CoWO4 microspheres with preferred crystal planes and oxygen vacancies were synthesized, leading to enhanced conductivity and reaction activity, resulting in higher capacity and superior rate capability.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Inorganic & Nuclear
Naibao Huang, Wenjing Dong, Yuan Feng, Wei Liu, Likui Guo, Jingnan Xu, Xiannian Sun
Summary: Fe-N-C systems decorated with Fe/Fe3C nanoparticles have been prepared by a practical strategy involving the use of an Fe2O3 microsphere template covered with a thin layer of polymerized dopamine (PDA) mixed with a high N-content source of g-C3N4. The resulting Fe/Fe3C@FeNC catalyst exhibits excellent electrochemical performance, achieving high half-wave potential for ORR and low overpotential for OER. Moreover, a rechargeable Zn-air battery assembled with the as-obtained catalyst shows high peak energy density, high specific capacity, and excellent stability.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Electrical & Electronic
Junjie Zhang, Miao Tang, Xiannian Sun, Naibao Huang, Yin Sun, Likui Guo, Pei Wang
Summary: By ball-milling and ultrasonication treatment, the ORR performance of biomass-derived carbon materials can be improved to be comparable to 20% Pt/C. Ultrasonication treatment can remove low N content particles and expose high N content surface, leading to improved ORR activity and durability. This study indicates the great potential of biomass-derived carbon materials as ORR catalysts.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Physics, Applied
Bin Wang, Miao Tang, Wanting Li, Wenjing Dong, Xiaowen Ge, Naibao Huang
Summary: S self-doped porous carbon nanospheres ORR catalyst was prepared by pyrolyzing F127 grafted with 3-mercapto-propanoic acid, aiming to increase activity and decrease cost. The composition and microstructure were characterized, and its electrochemical performance was examined in O-2-saturated 0.1 M KOH solutions. The obtained C-S-750 sample exhibited a porous carbon nanosphere structure with 7.08% doped sulfur content and a maximum specific surface area of 776.3 m²/g. Its onset potential, half-wave potential, and limiting current density were comparable to commercial 20% Pt/C catalysts, suggesting a new approach for introducing and increasing doped heteroatoms in metal-free ORR catalysts.
MODERN PHYSICS LETTERS B
(2023)
Article
Chemistry, Multidisciplinary
Likui Guo, Junjie Zhang, Yin Sun, Sen Liu, Wei Liu, Wenjing Dong, Naibao Huang, Xiannian Sun
Summary: Nanoparticles of FeFe2O4 were synthesized through a hydrothermal reaction and their electrochemical performance in oxygen reduction reaction (ORR) was evaluated. FeFe2O4-0.50 exhibited the best catalytic activity and stability, and could be a potential catalyst for ORR.
Article
Physics, Applied
Sen Liu, Yin Sun, Junjie Zhang, Likui Guo, Changbo Xie, Jin Ma, Yichong Chen, Haoqu Jin, Xiannian Sun, Naibao Huang
Summary: A structured carambola-like CoWO4 was synthesized using a microwave-assisted hydrothermal method with urea and NH4F. The as-obtained CoWO4 exhibited a large specific surface area, high dispersion, and self-selected orientation of crystal growth. Electrochemical tests demonstrated high specific capacity, low internal resistance, and excellent cycle stability, suggesting that CoWO4 has great potential as a hybrid supercapacitor electrode material. This work also provides a new solution for improving the electrochemical performance of CoWO4-based hybrid supercapacitor materials by regulating their morphology.
MODERN PHYSICS LETTERS B
(2023)
Article
Chemistry, Multidisciplinary
Naibao Huang, Yin Sun, Sen Liu, Xinyu Wang, Junjie Zhang, Likui Guo, Jiapeng Bi, Xiannian Sun
Summary: Researchers have synthesized a carbon nanotube (CNT)-Mn3O4/CoWO4 triple-segment hybrid electrode using a microwave-assisted hydrothermal route. The electrode demonstrates abundant heterointerfaces and interfacial chemical bonds, resulting in high specific capacity, wide operating voltage window, satisfactory rate capability, and excellent cycling stability. This work provides a new tactic to develop high-performance cathodes for advanced battery-supercapacitor devices.
Article
Materials Science, Multidisciplinary
Jiadong Liao, Guogang Yang, Qiuwan Shen, Shian Li, Ziheng Jiang, Hao Wang, Guoling Zhang, Zheng Li, Naibao Huang
Summary: An effective catalytic layer structure design can enhance the performance of PEMFC. The study analyzed the spatial distribution of platinum particles, ionomers, and carbon particles in a three-dimensional cathode catalytic layer structure. The simulation results showed that positive gradient distributions of Pt and ionomer content can increase the reaction rate. Furthermore, the size and number of perforations also affect the reaction transport process, with larger perforation radius leading to higher oxygen concentration in the pore and ionomer.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yin Sun, Xiannian Sun, Junjie Zhang, Sen Liu, Likui Guo, Jiapeng Bi, Naibao Huang
Summary: The study successfully synthesized cobalt oxide porous nanowires using a microwave-assisted hydrothermal process, which showed superior electrochemical performance compared to materials synthesized by a conventional hydrothermal process. This improvement can be attributed to factors such as the purification effect and lattice expansion introduced by microwave assistance.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Chemistry, Multidisciplinary
Nai-bao Huang, Jun-jie Zhang, Yin Sun, Xian-nian Sun, Zhong-yu Qiu, Xiao-wen Ge
NEW JOURNAL OF CHEMISTRY
(2020)