Article
Chemistry, Multidisciplinary
Zeyu Xi, Jiuhui Han, Zeyu Jin, Kailong Hu, Hua-Jun Qiu, Yoshikazu Ito
Summary: Nitrogen-doped nanoporous graphene exhibits enhanced catalytic activity and improved performance in metal-air batteries. The design of catalytically active 3D nanoporous graphene enhances the performance of both Mg-air batteries and carbon-neutral technologies.
Article
Chemistry, Multidisciplinary
Rajendra Singh, Daniel Scheinecker, Ursula Ludacka, Jani Kotakoski
Summary: Graphene, the best known 2D material, is prone to corrugations. Factors such as the size of the free-standing area, preparation method, surface contamination, and electron-beam-induced disorder affect the corrugation in graphene.
Article
Materials Science, Multidisciplinary
Harihara Ramamoorthy, Kanokwan Buapan, Tinna Chiawchan, Krongtham Thamkrongart, Ratchanok Somphonsane
Summary: A study on the thermal reduction of free-standing graphene oxide (GO) papers reveals major structural changes occurring at 200-300 degrees C, leading to a significant drop in sample resistance above 200 degrees C. The study also shows that at higher reduction temperatures, vacancy-type defects impede the overall effectiveness of the reduction process.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Mahmoud Mohamed Saad Abdelnabi, Chiara Izzo, Elena Blundo, Maria Grazia Betti, Marco Sbroscia, Giulia Di Bella, Gianluca Cavoto, Antonio Polimeni, Isabel Garcia-Cortes, Isabel Rucandio, Alejandro Morono, Kailong Hu, Yoshikazu Ito, Carlo Mariani
Summary: Functionalization of graphene by incorporating hydrogen isotopes can lead to the opening of an energy gap, making it promising for various applications. Utilizing high-energy electron ionization and ion irradiation enables the production of low defect, high Deuterium (D) loaded graphene, showing potential for large-scale fabrication of semiconducting graphane.
Article
Nanoscience & Nanotechnology
Jianpeng Feng, Kangjie Zhou, Changsha Liu, Qi Hu, Hui Fang, Hengpan Yang, Chuanxin He
Summary: In this study, a free-standing electrocatalyst was constructed by confining a superbase and hydrophobic ionic liquid into Ni foam pores. This strategy successfully suppresses the hydrogen evolution reaction and improves the efficiency of CO2 reduction. The high CO2 capacity and modulation effect of the ionic liquid also play a positive role in the reaction.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Physics, Applied
Xiu-Yan Fu, Qing Cai, Jia-Nan Ma, Lin Zhu, Dong-Dong Han, Yong-Lai Zhang
Summary: In this study, a hierarchically structured PRGO-based planar supercapacitor was reported by combining two-beam-laser-interference with the masking technique. The planar supercapacitor showed improved surface area, electric double-layer capacitors formation, and rapid ion diffusion paths due to the hierarchical structures. The hierarchically structured PRGO-based planar supercapacitor achieved an areal capacitance of 3.97 mFcm(-2) at 10mVs(-1), offering a new route for manufacturing high-performance integrated energy storage devices.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Zeheng Lin, Qingran Zhang, Jian Pan, Constantine Tsounis, Ali Asghar Esmailpour, Shibo Xi, Hui Ying Yang, Zhaojun Han, Jimmy Yun, Rose Amal, Xunyu Lu
Summary: A hierarchical porous free-standing ORR electrode comprising cobalt single atoms on vertically aligned graphene nanosheets is demonstrated to achieve high H2O2 productivity. The electrode exhibits close to 100% H2O2 selectivity in an H-cell setup and achieves high peroxide concentration and low energy consumption in a gas-diffusion flow reactor.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Engineering, Environmental
Md Osim Aquatar, Juili S. Mankar, Urvashi Bhatia, Sadhana S. Rayalu, Reddithota J. Krupadam
Summary: Highly efficient CO2 capture at elevated temperatures has been achieved using few-layered graphene nanosheets prepared from solid waste from high energy explosive materials industry. The materials demonstrated high adsorption capacity, selectivity towards CO2, fast adsorption kinetics, and recycling stability, making them promising for real-life CO2 capture applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Bing Lu, Lingxiao Lv, Xinqun Zhang, Yang Zhao, Qing Chen, Huhu Cheng, Liangti Qu
Summary: Defective carbon materials, especially graphene, have shown great potential in energy conversion and storage due to their unique properties. Traditional preparation methods are destructive and tedious, while a new high-temperature hydrothermal method presented in this work allows for the synthesis of high defect density graphene materials with superior electrocatalytic activity and high capacitance.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Maria Grazia Betti, Ernesto Placidi, Chiara Izzo, Elena Blundo, Antonio Polimeni, Marco Sbroscia, Jose Avila, Pavel Dudin, Kailong Hu, Yoshikazu Ito, Deborah Prezzi, Miki Bonacci, Elisa Molinari, Carlo Mariani
Summary: By exposing fully free-standing nanoporous samples of graphene to atomic hydrogen in ultrahigh vacuum, the researchers achieved an unprecedented level of hydrogenation, converting conductive graphene into a wide gap semiconductor. The experimental results confirmed the theoretical predictions of a stable, double-sided fully hydrogenated configuration without pi states.
Article
Chemistry, Physical
Huiyong Liang, Dawei Guan, Yuda Liu, Lunxiang Zhang, Jiafei Zhao, Lei Yang, Yongchen Song
Summary: This study used in situ high-resolution X-ray computed tomography measurements to explore the mechanisms of hydrate growth in the presence of surfactants. It was found that the presence of hydrate crystals triggered enhanced growth on the reactor wall. A time delay was observed before the bulk water reservoir transformed into hydrate. The lower interfacial tension between the hydrate surface and the solution facilitated its adsorption onto the reactor wall. These fundamental results are valuable for understanding the mechanism of hydrate growth in the presence of surfactants and its potential applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Tianpei Li, Tengpeng Wang, Changcai Shi, Shuo Chang, Min Zhang, Yanxia Zhao, C. E. Buckley, Yingchao Dong, Dehua Dong
Summary: Gaseous NOx emission is a critical environmental challenge and solid oxide cells (SOCS) offer great promises for effectively reducing NOx through electrochemical reduction. The study demonstrates efficient reduction of low-concentration NO over the same SOCS under different conditions, providing flexibility in cell operation. The design of dendritically channeled supporting perovskite cathodes increases electrolysis current density, enables stable operation, and facilitates high-performance hazardous gas conversion applications.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Maria Grazia Betti, Elena Blundo, Marta De Luca, Marco Felici, Riccardo Frisenda, Yoshikazu Ito, Samuel Jeong, Dario Marchiani, Carlo Mariani, Antonio Polimeni, Marco Sbroscia, Francesco Trequattrini, Rinaldo Trotta
Summary: The adsorption of deuterium on nanoporous graphene reveals a homogeneous distribution and the formation of hybrid bonds. This study provides an efficient strategy for obtaining high-quality semiconducting graphane.
Article
Chemistry, Multidisciplinary
Martin Lee, Johannes R. Renshof, Kasper J. van Zeggeren, Maurits J. A. Houmes, Edouard Lesne, Makars Siskins, Thierry C. van Thiel, Ruben H. Guis, Mark R. van Blankenstein, Gerard J. Verbiest, Andrea D. Caviglia, Herre S. J. van der Zant, Peter G. Steeneken
Summary: This study successfully combines graphene electrodes with free-standing complex oxide, BaTiO3 (BTO), to create ultrathin piezoelectric resonators with variable resonance frequency and ferroelectric memory effect.
ADVANCED MATERIALS
(2022)
Article
Engineering, Environmental
Amar M. Patil, Jiajia Wang, Shasha Li, Xiaoqiong Hao, Xiao Du, Zhongde Wang, Xiaogang Hao, Abuliti Abudula, Guoqing Guan
Summary: In this study, a 3D hollow graphene foam was prepared by a template assisted-chemical vapor deposition method, with interconnected monoclinic WO3 nanoparticles and 2D Ti3C2Tx sheets loaded on its inner and outer sides using electrodeposition and drop casting methods. The resulting electrode exhibited excellent specific capacitance, cycling stability, and energy density, making it a promising candidate for advanced supercapacitors. The asymmetric solid-state supercapacitor showed superior performance compared to symmetric supercapacitors based on MXene, with a wider potential range, high specific capacitance, energy density, and cycling stability over a large number of cycles.
CHEMICAL ENGINEERING JOURNAL
(2021)