Article
Chemistry, Physical
Ahmed Abutaleb, Nasser Zouli, M. M. El-Halwany, Mohd Ubaidullah, Ayman Yousef
Summary: In this study, bimetallic nickel-manganese nanoalloy-decorated graphitic nanofibers were successfully prepared using electrospinning and exhibited high reusability and catalytic activity for hydrogen generation. Samples composed of 55 wt% nickel and 45 wt% manganese showed the best catalytic activity with an initial turnover frequency (TOF) of 58.2, twice that of the manganese-free catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yasar Karatas, Adem Zengin, Mehmet Gulcan
Summary: This study reports the fabrication, characterization, and application of amine-terminated CuMnO2-NH2 supported palladium nanoparticles as highly efficient and recyclable catalysts for hydrogen production from the methanolysis of ammonia-borane. The results reveal that Pd (0) nanoparticles are well spread on the surface of CuMnO2-NH2, and Pd/CuMnO2-NH2 exhibits high catalytic activity and extreme stability in the reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Shilong Yang, Yue Zhu, Jiaxin Liu, Xiucheng Zheng, Xiaoli Zhang, Pu Liu
Summary: In this study, a variety of composites were prepared from chitosan (CS) and hexagonal boron nitride (h-BN) with the assistance of ultrasonication. Ru nanoparticles (NPs) were anchored onto the composites through an adsorption-chemical reduction approach. The Ru/CS-h-BN catalyst with 20% CS loading showed the highest catalytic activity for ammonia borane (AB) hydrolysis, providing a new avenue for the development of structure-sensitive nano-metal materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Licheng Liang, Linyan Bian, Yanping Fan, Shuyan Guan, Xianyun Liu, Qunying Sun, Baozhong Liu
Summary: Efficient catalysts are essential for sustainable utilization of hydrogen energy. Ru/Ti3C2-xNx catalysts were designed using N-doped two-dimensional material MXene as support for hydrogen generation from ammonia borane hydrolysis. The catalysts exhibited ultrafine particle size and high turnover frequency, attributed to the confinement and anchoring effects of Ti3C2-xNx. XPS and isotope experiments confirmed the role of N atoms in promoting the reaction and identified the rate-determining step as H2O dissociation. This research provides a strategy to enhance the catalytic performance of heterogeneous catalysts through N-doping.
Article
Chemistry, Physical
Serdar Akbayrak, Saim Ozkar
Summary: In this study, magnetically separable Pt-0/CoFe2O4 nanoparticles were prepared and found to exhibit high catalytic activity and outstanding reusability in the hydrolysis of ammonia borane.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yafei Xu, Jun Wang, Rui Xu, Wuke Li
Summary: The smart catalyst shows temperature-controlled catalytic activity in releasing hydrogen from ammonia borane, with high catalytic activity at room temperature and significantly suppressed hydrogen generation at high temperature. The switchable red luminescence of the composite hydrogel in solution at high/low temperatures offers the possibility to track the catalyst and understand the catalytic mechanism. This thermo-controllable system of hydrogen generation has great potential applications in the safe hydrolysis from chemical hydride fuel.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
Melike Sevim, Fatma Kaplan
Summary: In this study, the catalytic efficiency of NiPt alloy nanoparticles in the hydrolytic dehydrogenation of ammonia borane was investigated by synthesizing monodisperse NiPt alloy NPs and supporting them on different materials. Among the tested nanocatalysts, KB-supported NiPt NPs exhibited high activity and durability, with Ni70Pt30 NPs showing the best catalytic performance. The detailed kinetics of the KB-NiPt nanocatalyst were reported, including the activation energy for the catalytic hydrolysis of AB.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Energy & Fuels
Saim Ozkar
Summary: This article reports on how to increase the overall catalytic performance of precious platinum nanocatalysts in the hydrolytic dehydrogenation of ammonia borane. The approaches mentioned include the use of colloidal nanoparticles, supporting the nanoparticles on large surface area materials, selecting suitable oxide support, downsizing the nanoparticles, and using magnetic powder materials as support. These methods can enhance the utilization efficiency and performance of platinum nanocatalysts.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Chemistry, Physical
Saim Ozkar
Summary: This review summarizes recent studies on the preparation and use of magnetically separable transition metal nanoparticles (TMNs) as reusable catalysts for the hydrolytic dehydrogenation of ammonia borane (AB). Research includes intrinsically magnetic TMNs, core-shell multimetallic nanoparticles, and TMNs supported on various materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Derya Ozhava, Yasemin Cigdem, Sureyya Erturk
Summary: This study presents the preparation and use of magnetically isolable nanocatalyst Rh0@Fe3O4, consisting of rhodium nanoparticles (Rh0NPs) on the surface of magnetite nanospheres, for the methanolysis of ammonia borane (MAB). The Rh0NPs are well stabilized and homogeneously distributed on the nanospheres with a mean particle size of 2.8 ± 0.5 nm. The Rh0@Fe3O4 nanocatalyst exhibits high catalytic activity and can be reused multiple times, with a remarkable TOF value of 184 min-1 and maintaining 100% initial activity after four reuses of MAB at room temperature.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Serdar Akbayrak, Yalcin Tonbul, Saim Ozkar
Summary: The study demonstrates that Rh0/WO3 (0.5% wt. Rh) catalyst shows high catalytic activity in the hydrolysis of ammonia borane, mainly attributed to its reducible nature as the support. Additionally, compared to colloidal(0) nanoparticles, Rh0/WO3 (0.5% wt. Rh) catalyst exhibits better performance in terms of activity, recyclability, and reusability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jin-Tao Du, Hao Niu, Hao Wu, Xiao-Fei Zeng, Jie-Xin Wang, Jian-Feng Chen
Summary: Poly(N-vinyl-2-pyrrolidone) (PVP)-protected platinum nanoparticles supported on gamma-methacryloxypropyltrimethoxysilane (gamma-MPS) modified silica spheres (Pt-PVP/SiO2(M)) exhibit high catalytic activity for the hydrolysis of ammonia borane (AB), with small size, uniform dispersion, and low activation energy. The synergistic effect between the modifier of silica spheres and the capping agent of metal nanoparticles contributes to the higher loading amount and turnover frequency (TOF) values compared to counterparts without gamma-MPS and PVP.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Levent Semiz
Summary: This study developed a highly active and reusable platinum catalyst for the dehydrogenation of ammonia borane. The catalyst, prepared by alloying and dealloying platinum-aluminum alloy, exhibited the highest hydrogen generation rate and activation energy in methanol solution. Additionally, the catalyst demonstrated high durability when effective washing step was applied after each utilization.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Nuonuo Zhang, Genjiang Liu, Yao Sun, Yanlan Wang, Jiaying Yan, Xiang Liu
Summary: H2 generation upon hydrolysis of ammonia-borane catalyzed by stabilized transition metal nanoparticles has been demonstrated, showing high catalytic activity and the RhNP-3/THPP exhibits the best performance.
Article
Chemistry, Inorganic & Nuclear
Yao Tian, Chunmei Zeng, Shiyu Yang, Yang Luo, Lunhong Ai, Jing Jiang
Summary: In this study, a cobalt-defective Co3O4 catalyst was synthesized and showed outstanding catalytic activity for the hydrolysis of ammonia borane, along with high hydrogen production rate and low activation energy. The catalyst's performance was well maintained for consecutive cycles.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Long Chen, Ze Li, Qinqin Xiao, Miao Li, Yan Xu, Xiaoqing Qiu
Summary: Graphite carbon nitride nanosheets (CNNS) with a thickness of about 1 nm were prepared by stripping and surface modification with Cu(II) cluster. These CNNS can be used to construct photoelectrochemical sensors for p-nitrotoluene monitoring. The sensor showed a linear relationship between the change in photocurrent signal and the logarithm of p-nitrotoluene concentration, indicating its potential for trace detection in water environmental contaminants monitoring. This work provides new insights for the design and construction of efficient and durable photoelectrochemical sensors.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Qinqin Xiao, Long Chen, Yan Xu, Wenhui Feng, Xiaoqing Qiu
Summary: In this study, it was found that surface oxygen vacancies in barium titanate nanoparticles can enhance light absorption and charge separation, but slightly impair piezoelectric property, resulting in a double-edged sword effect on the photocatalytic and piezoelectric activities. The surface oxygen vacancies can enhance photocatalytic activity by 3.5 times, while reducing piezoelectric catalytic performance by 1.5 times. This research reveals the influence and mechanism of surface oxygen vacancies on the piezo-photocatalytic activity of BaTiO3.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Chemical
Li Luo, Yan Xu, Dongsheng Wang, Xiaoqing Qiu
Summary: Developing an effective and durable Pt-free oxygen reduction reaction (ORR) catalyst is crucial for alleviating the energy and pollution crisis. In this study, Co nanoparticles/N-doped carbon (Co/N/C) with tunable Co contents were synthesized, leading to superior ORR performance with a half-wave potential of 0.84 V and a mass activity of 5.18 A/g. Furthermore, the Co/N/C-2.86 wt% catalyst exhibited outstanding cell performance in Zinc-Air batteries (ZABs) with a high open-circuit voltage, specific discharge capacity, and maximum power density. This work provides a promising approach for designing high-performance ORR electrocatalysts for advanced ZABs.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Yan Xu, Wenyuan Li, Long Chen, Wenzhang Li, Wenhui Feng, Xiaoqing Qiu
Summary: This study explores the effect of the nitrogen-coordination structure of dual-atomic Fe2 sites on the performance of the oxygen reduction reaction (ORR). The Fe2-N6-C catalyst shows better performance than Fe2-N4-C and commercial Pt/C in alkaline electrolytes. The Fe2-N6-C-based zinc-air battery exhibits high power density and durability. Theoretical calculations reveal that the electronic and geometrical structure of Fe2-N6 promotes the adsorption of O2 molecules and facilitates the ORR process.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Liping Tong, Zhanggui Hu, Zhen Long, Mei Tang, Xiaoqing Qiu
Summary: This study prepared LiFePO4/C@La2O3 by a simple method, and this material exhibits high lithium ion diffusivity and good cyclic stability. It shows promising applicability in improving the capacity retention of cathode materials in lithium-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yan Xu, Shanyong Chen, Long Chen, Xinwang Zhu, Xiaoqing Qiu, Min Liu
Summary: In this study, the authors propose a novel strategy to enhance the electron confinement of the indium center in an extended macrocyclic conjugation system for high-efficiency H2O2 production. The prepared InPPc catalyst exhibits a remarkable H2O2 selectivity above 90% and a high average H2O2 production rate of 23.77 mg/cm(2)/h in a flow cell. This study provides new insights into the ORR mechanism and offers a promising route for H2O2 production.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Li Luo, Xiaoyan Yuan, Dongsheng Wang, Xiaoqing Qiu
Summary: The construction of multi-component composites has become an attractive strategy for high-performance microwave absorption through balancing the magnetic and dielectric loss. However, the influences of different components on absorption performance are ambiguous, which has inevitably hampered the widespread applications of microwave absorbents.
Article
Chemistry, Physical
Yanfang Zhang, Weixin Qiu, Yang Liu, Keke Wang, Wenyuan Li, Jihu Kang, Xiaoqing Qiu, Min Liu, Wenzhang Li, Jie Li
Summary: Inspired by the bilayer phospholipid molecular structure of cell membranes, a Cu(2)O/Sn photocathode modified with the bilayer surfactant DHAB was developed to achieve high CO2 permeability and suppress HER. The Cu2O/Sn/DHAB photocathode stabilizes the *OCHO intermediate and facilitates the production of HCOOH.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
M. Li, L. Chen, M. A. Maigbay, X. Qiu
Summary: The photoelectrochemical technology using ZnIn2S4 (ZIS)-based photoelectrodes has promising applications in various fields such as hydrogen production, biosensing, photocathodic protection, and photoelectrocatalytic degradation. This article provides a scientific review on the applications of ZIS-based photoelectrodes, highlighting the strategies for modification and signal amplification. The existing problems and development prospects are also discussed to promote their real-world applications.
MATERIALS TODAY CHEMISTRY
(2023)
Review
Chemistry, Physical
Kuang Sheng, Guang Li, Jiayu Hao, Yanqiu Wang, Kaili Shi, Yang Liu, Ning Zhang, Xiaoqing Qiu, Min Liu, Wenzhang Li, Jie Li
Summary: This paper illustrates the relationship between the structure and multifunctional performance of mono-disperse catalysts using reversible oxygen electrocatalysis as an example. The progress in carbon-based and non-carbon-based mono-disperse catalysts is reviewed, and the prospects and challenges of mono-disperse catalysts for multifunctional electrocatalytic reactions are discussed.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Yanfang Zhang, Weixin Qiu, Yang Liu, Keke Wang, Luwei Zou, Yu Zhou, Min Liu, Xiaoqing Qiu, Jie Li, Wenzhang Li
Summary: We constructed a Cu2O/Sn/PTFE photocathode with a hydrophobic surface to enhance the CO2 reduction activity in photoelectrochemical (PEC) CO2 reduction. Compared to the Cu2O photocathode, the Cu2O/Sn/PTFE photocathode showed an increase in CO faradaic efficiency from 34.5% to 95.1% at -0.7 V vs. RHE, while the FEH2 decreased from 27.9% to 3.8%. The introduction of the hydrophobic layer enhanced the local CO2 concentration on the electrode surface and effectively isolated H+ ions.
CHEMICAL COMMUNICATIONS
(2023)
Article
Electrochemistry
Xiaohang Lou, Yi Cao, Shuai Guo, Huawei Han, Xiubao Jiang, Sudu Siqing, Zhen Long, Xianchao Zhu, Xiaoqing Qiu
Summary: In this study, high-performance hard carbon material was successfully synthesized and the effects of hydrogen reduction on the evolution of functional groups and electrochemical performance were investigated. It was found that hydrogen reduction treatment greatly enhanced the surface features and layer spacing of hard carbon, improving its dynamics.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Green & Sustainable Science & Technology
D. Wang, L. Luo, Y. Chen, S. Chen, X. Qiu, M. Liu
Summary: Fluorine pollution is a significant global concern that has adverse effects on aquatic organisms and human life. This study demonstrates that solid waste of red mud from the aluminum industry can be converted into efficient fluoride adsorbents by incorporating cerium-based compounds. The optimized red mud-derived fluoride adsorbents exhibit high adsorption capacity and can effectively treat heavily fluorinated wastewater.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Multidisciplinary
Yanfang Zhang, Qingmei Wang, Keke Wang, Yang Liu, Luwei Zou, Yu Zhou, Min Liu, Xiaoqing Qiu, Wenzhang Li, Jie Li
Summary: This study achieves effective charge separation and surface catalytic reaction for photoelectrochemical CO2 reduction by decorating silver on Cu2O nanowires, resulting in a high faradaic efficiency for CH3COOH production.
CHEMICAL COMMUNICATIONS
(2022)
Review
Engineering, Environmental
Haixia Wang, Yan Xu, Dafu Xu, Long Chen, Xiaoqing Qiu, Yongfa Zhu
Summary: Graphitic carbon nitride (g-C3N4) shows great potential in PEC sensing due to its strong light response and unique advantages. This review summarizes recent advances in using g-C3N4 for PEC detection of environmental pollutants, focusing on strategies to improve optoelectrical conversion efficiency and the PEC sensing mechanism involving light absorption and charge separation and migration. Challenges and opportunities for developing g-C3N4-based PEC sensors are also discussed.
ACS ES&T ENGINEERING
(2022)