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Full-Text Articles in Physical Sciences and Mathematics
A Self‐Assembled Co2 Reduction Electrocatalyst: Posy‐Bouquet‐Shaped Gold‐Polyaniline Core‐Shell Nanocomposite, Amruthalakshmi Vijayakumar, Yong Zhao, Jinshuo Zou, Kezhong Wang, Chong Yong Lee, Douglas Macfarlane, Caiyun Wang, Gordon G. Wallace
A Self‐Assembled Co2 Reduction Electrocatalyst: Posy‐Bouquet‐Shaped Gold‐Polyaniline Core‐Shell Nanocomposite, Amruthalakshmi Vijayakumar, Yong Zhao, Jinshuo Zou, Kezhong Wang, Chong Yong Lee, Douglas Macfarlane, Caiyun Wang, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
© 2020 Wiley-VCH GmbH Here it was demonstrated that the decoration of gold (Au) with polyaniline is an effective approach in increasing its electrocatalytic reduction of CO2 to CO. The core-shell-structured gold-polyaniline (Au−PANI) nanocomposite delivered a CO2-to-CO conversion efficiency of 85 % with a high current density of 11.6 mA cm−2. The polyaniline shell facilitated CO2 adsorption, and the subsequent formation of reaction intermediates on the gold core contributed to the high efficiency observed.
Coupling N2 And Co2 In H2o To Synthesize Urea Under Ambient Conditions, Chen Chen, Xiaorong Zhu, Xiaojian Wen, Yangyang Zhou, Ling Zhou, Hao Li, Li Tao, Qiling Li, Shiqian Du, Tingting Liu, Dafeng Yan, Chao Xie, Yuqin Zou, Yanyong Wang, Ru Chen, Jia Huo, Yafei Liu, Jun Cheng, Hui Su, Xu Zhao, Weiren Cheng, Qinghua Liu, Hongzhen Lin, Jun Luo, Jun Chen, Mingdong Dong, Kai Cheng, Conggang Li, Shuangyin Wang
Coupling N2 And Co2 In H2o To Synthesize Urea Under Ambient Conditions, Chen Chen, Xiaorong Zhu, Xiaojian Wen, Yangyang Zhou, Ling Zhou, Hao Li, Li Tao, Qiling Li, Shiqian Du, Tingting Liu, Dafeng Yan, Chao Xie, Yuqin Zou, Yanyong Wang, Ru Chen, Jia Huo, Yafei Liu, Jun Cheng, Hui Su, Xu Zhao, Weiren Cheng, Qinghua Liu, Hongzhen Lin, Jun Luo, Jun Chen, Mingdong Dong, Kai Cheng, Conggang Li, Shuangyin Wang
Australian Institute for Innovative Materials - Papers
© 2020, The Author(s), under exclusive licence to Springer Nature Limited. The use of nitrogen fertilizers has been estimated to have supported 27% of the world’s population over the past century. Urea (CO(NH2)2) is conventionally synthesized through two consecutive industrial processes, N2 + H2 → NH3 followed by NH3 + CO2 → urea. Both reactions operate under harsh conditions and consume more than 2% of the world’s energy. Urea synthesis consumes approximately 80% of the NH3 produced globally. Here we directly coupled N2 and CO2 in H2O to produce urea under ambient conditions. The process was carried out using an …
Fabrication Of Heterostructured Uio-66-Nh2 /Cnts With Enhanced Activity And Selectivity Over Photocatalytic Co2 Reduction, Xiaojun Wang, Guorui Yang, Guodong Chai, Muhammad Nasir, Silan Wang, Xing Zheng, Caiyun Wang, Wei Yan
Fabrication Of Heterostructured Uio-66-Nh2 /Cnts With Enhanced Activity And Selectivity Over Photocatalytic Co2 Reduction, Xiaojun Wang, Guorui Yang, Guodong Chai, Muhammad Nasir, Silan Wang, Xing Zheng, Caiyun Wang, Wei Yan
Australian Institute for Innovative Materials - Papers
© 2020 Hydrogen Energy Publications LLC Developing photocatalysts with superior efficiency and selectivity is an important issue for photocatalytic converting CO2. Hierarchically heterostructured one-dimensional nanomaterials represent a kind of promising catalysts for photocatalytic CO2 reduction on account of the high surface area and synthetic effect between different components. Herein, we synthesized UIO-66-NH2/carbon nanotubes (CNTs) heterostructures via a hydrothermal method, and investigated their photocatalytic performance. The element mapping, X-ray diffraction, and X-ray photoelectron spectroscopy collectively confirmed that the UIO-66-NH2 was successfully loaded on the surface of the CNTs. The specific surface area of the UIO-66-NH2/CNTs is 1.5 times higher than that …
Supercritical Co2-Constructed Intralayer [Bi2o2]2+Structural Distortion For Enhanced Co2 Electroreduction, Yannan Zhou, Pengfei Yan, Jun Jia, Suoying Zhang, Xiaoli Zheng, Li Zhang, Bin Zhang, Jun Chen, Weichang Hao, Gongji Chen, Qun Xu, Buxing Han
Supercritical Co2-Constructed Intralayer [Bi2o2]2+Structural Distortion For Enhanced Co2 Electroreduction, Yannan Zhou, Pengfei Yan, Jun Jia, Suoying Zhang, Xiaoli Zheng, Li Zhang, Bin Zhang, Jun Chen, Weichang Hao, Gongji Chen, Qun Xu, Buxing Han
Australian Institute for Innovative Materials - Papers
© 2020 The Royal Society of Chemistry. Inducing crystal distortion in two-dimensional (2D) materials to increase the number of active sites is of great significance in improving the intrinsic activity of electrocatalysts for the CO2 reduction reaction (CO2RR). Developing 2D materials as thin as possible is required for this goal. Herein, taking layered BiOCl as a prototype model, we achieved the intralayer [Bi2O2]2+ structural distortion by using supercritical CO2 as a solvent to reduce the number of interlayer chlorine atoms involved in the reaction. Contrary to expectations, further CO2RR experiments indicate that thick nanoplates exhibit a high faradaic efficiency of …
Zn-Doped Cu(100) Facet With Efficient Catalytic Ability For The Co2 Electroreduction To Ethylene, Yuefeng Zhang, Yong Zhao, Caiyun Wang, Zengxi Wei, Junliang Yang, Jianmin Ma
Zn-Doped Cu(100) Facet With Efficient Catalytic Ability For The Co2 Electroreduction To Ethylene, Yuefeng Zhang, Yong Zhao, Caiyun Wang, Zengxi Wei, Junliang Yang, Jianmin Ma
Australian Institute for Innovative Materials - Papers
Electrochemically converting CO2 into fuels and chemicals is an appealing strategy to create energy rich products. The highly demanded product ethylene has been preferably produced on Cu-based catalysts with abundant exposed Cu(100) facets. However, the performance is still limited by the large energy barrier for the C-C dimerization. Here, to lower the energy barrier, we tailor the electronic structure of Cu(100) by doping a series of transition metals using the density functional theory (DFT) method. The zinc-doped Cu(100) surface has shown a superior catalytic performance. Mechanistic study further reveals that doping with Zn alters the electronic structure around Cu, adjusts …
Engineering Surface Amine Modifiers Of Ultrasmall Gold Nanoparticles Supported On Reduced Graphene Oxide For Improved Electrochemical Co2 Reduction, Yong Zhao, Caiyun Wang, Yuqing Liu, Douglas R. Macfarlane, Gordon G. Wallace
Engineering Surface Amine Modifiers Of Ultrasmall Gold Nanoparticles Supported On Reduced Graphene Oxide For Improved Electrochemical Co2 Reduction, Yong Zhao, Caiyun Wang, Yuqing Liu, Douglas R. Macfarlane, Gordon G. Wallace
Australian Institute for Innovative Materials - Papers
Ultrasmall gold (Au) nanoparticles with high mass activity have great potential for practical applications in CO2electroreduction. However, these nanoparticles often suffer from poor product selectivity since their abundant low-coordinated sites are favorable for H2evolution. In this work, a catalyst, reduced graphene oxide supported ultrasmall Au nanoparticles (≈2.4 nm) is developed which delivers high Au-specific mass activities (>100 A g-1) and good Faradaic efficiencies (32-60%) for the CO2-to-CO conversion at moderate overpotentials (450-600 mV). The efficiencies can be improved to 59-75% while retaining the ultrahigh mass activities via a simple amine-modification strategy. In addition, an amine-structure-dependent effect is revealed: linear …
Co2 Pipeline Infrastructure - Lessons Learnt, Paul Noothout, Frank Wiersma, Omar Hurtado, Doug Macdonald, Jasmin Kemper, Klaas Van Alphen
Co2 Pipeline Infrastructure - Lessons Learnt, Paul Noothout, Frank Wiersma, Omar Hurtado, Doug Macdonald, Jasmin Kemper, Klaas Van Alphen
SMART Infrastructure Facility - Papers
Some 6,500 km of CO2 pipelines have been operating for years for Enhanced Oil Recovery (EOR) operations, primarily in the United States. Moreover, there are a number of CO2 pipelines that are in use for CO2 utilization (CCU) or Carbon Capture and Storage (CCS) operations in Europe and the Americas. Valuable experience and lessons learned are available from these projects relevant for all phases of CO2 pipeline projects: from early identification to execution and operation. A comprehensive set of information has been collected, evaluated and made accessible with the aim to benefit the development of future CO2 pipelines. The resulting …
Charge-Controlled Switchable Co2 Capture On Boron Nitride Nanomaterials, Qiao Sun, Zhen Li, Debra J. Searles, Ying Chen, Gao Qing (Max) Lu, Aijun Du
Charge-Controlled Switchable Co2 Capture On Boron Nitride Nanomaterials, Qiao Sun, Zhen Li, Debra J. Searles, Ying Chen, Gao Qing (Max) Lu, Aijun Du
Australian Institute for Innovative Materials - Papers
Increasing concerns about the atmospheric CO2 concentration and its impact on the environment are motivating researchers to discover new materials and technologies for efficient CO2 capture and conversion. Here, we report a study of the adsorption of CO2, CH4, and H2 on boron nitride (BN) nanosheets and nanotubes (NTs) with different charge states. The results show that the process of CO2 capture/release can be simply controlled by switching on/off the charges carried by BN nanomaterials. CO2 molecules form weak interactions with uncharged BN nanomaterials and are weakly adsorbed. When extra electrons are introduced to these nanomaterials (i.e., when they are …
Co2 Capture And Gas Separation On Boron Carbon Nanotubes, Qiao Sun, Meng Wang, Zhen Li, Yingying Ma, Aijun Du
Co2 Capture And Gas Separation On Boron Carbon Nanotubes, Qiao Sun, Meng Wang, Zhen Li, Yingying Ma, Aijun Du
Australian Institute for Innovative Materials - Papers
Concern about the increasing atmospheric CO2 concentration and its impact on the environment has led to increasing attention directed toward finding advanced materials and technologies suited for efficient CO2 capture, storage and purification of clean-burning natural gas. In this letter, we have performed comprehensive theoretical investigation of CO2, N2, CH4 and H2 adsorption on B2CNTs. Our study shows that CO2 molecules can form strong interactions with B2CNTs with different charge states. However, N2, CH 4 and H2 can only form very weak interactions with B 2CNTs. Therefore, the study demonstrates B2CNTs could sever as promising materials for CO2 capture and …
A Simulation Study Of The Kinetics Of Passage Of Co2 And N2 Through The Liquid/Vapor Interface Of Water, T Somasundaram, Marc In Het Panhuis, R M. Lynden-Bell, C H. Patterson
A Simulation Study Of The Kinetics Of Passage Of Co2 And N2 Through The Liquid/Vapor Interface Of Water, T Somasundaram, Marc In Het Panhuis, R M. Lynden-Bell, C H. Patterson
Australian Institute for Innovative Materials - Papers
The rate of passage of molecules of carbon dioxide and nitrogen through the vapor–liquid interface of water at 300 K is studied by simulation. Previous work has established the form of the free energy profile which has a minimum when the solute molecule is on the surface and a barrier between this state and solution in the bulk liquid. In one set of simulations, trajectories were initiated in the gas phase. From these, the average lifetime of molecules in the surface is determined to be considerably longer than the inverse of the energy relaxation rate, so that the sticking coefficient …