Yuhang Wang, Aoni Xu, Ziyun Wang, Linsong Huang, Jun Li, Fengwang Li, Joshua Wicks, Mingchuan Luo, Dae‐Hyun Nam, Chih‐Shan Tan, Yu Ding, Jiawen Wu, Yanwei Lum, Cao‐Thang Dinh, David Sinton, Gengfeng Zheng, Edward H. Sargent,
Electrochemical conversion of nitrate (NO3–) into ammonia (NH3) recycles nitrogen and offers a route to the production of NH3, which is more valuable than dinitrogen gas. However, today's development of NO3– electroreduction remains hindered by the lack of a mechanistic picture of how catalyst structure may be tuned to enhance catalytic activity. Here we demonstrate enhanced NO3– reduction reaction (NO3–RR) performance on Cu50Ni50 alloy catalysts, including a 0.12 V upshift in the half-wave potential ...
Tópico(s): Nanomaterials for catalytic reactions
2020 - American Chemical Society | Journal of the American Chemical Society
Jun Li, Aoni Xu, Fengwang Li, Ziyun Wang, Chengqin Zou, Christine M. Gabardo, Yuhang Wang, Adnan Ozden, Yi Xu, Dae‐Hyun Nam, Yanwei Lum, Joshua Wicks, Bin Chen, Zhiqiang Wang, Jiatang Chen, Yunzhou Wen, Tao‐Tao Zhuang, Mingchuan Luo, Xi‐Wen Du, Tsun‐Kong Sham, Bo Zhang, Edward H. Sargent, David Sinton,
Abstract Multi-carbon alcohols such as ethanol are valued as fuels in view of their high energy density and ready transport. Unfortunately, the selectivity toward alcohols in CO 2 /CO electroreduction is diminished by ethylene production, especially when operating at high current densities (>100 mA cm −2 ). Here we report a metal doping approach to tune the adsorption of hydrogen at the copper surface and thereby promote alcohol production. Using density functional theory calculations, we screen a suite ...
Tópico(s): Electrocatalysts for Energy Conversion
2020 - Nature Portfolio | Nature Communications
Jiageng Zheng, Angjian Wu, Hang Chen, Xingjie Lv, Aoni Xu, Xiaodong Li,
High-performance, low-cost and robust electrocatalysts for the hydrogen evolution reaction (HER) play a critical role in large-scale hydrogen production via water splitting. Herein, we proposed a synthesis strategy for the self-assembly of maize-like CoP nanorod arrays with abundant active sites via a combination of conventional hydrothermal reaction and low-temperature phosphorization. This unique architecture exhibited remarkable catalytic performance for the HER, with a low overpotential of 130 ...
Tópico(s): Advanced Photocatalysis Techniques
2020 - Elsevier BV | International Journal of Hydrogen Energy
Xianbiao Fu, Aoni Xu, Jakob B. Pedersen, Shaofeng Li, Rokas Sažinas, Yuanyuan Zhou, Suzanne Z. Andersen, Mattia Saccoccio, Niklas H. Deissler, Jon Bjarke Valbæk Mygind, Jakob Kibsgaard, Peter C. K. Vesborg, Jens K. Nørskov, Ib Chorkendorff,
Abstract Ammonia is a crucial component in the production of fertilizers and various nitrogen-based compounds. Now, the lithium-mediated nitrogen reduction reaction (Li-NRR) has emerged as a promising approach for ammonia synthesis at ambient conditions. The proton shuttle plays a critical role in the proton transfer process during Li-NRR. However, the structure-activity relationship and design principles for effective proton shuttles have not yet been established in practical Li-NRR systems. Here, ...
Tópico(s): Caching and Content Delivery
2024 - Nature Portfolio | Nature Communications
Shaofeng Li, Yuanyuan Zhou, Xianbiao Fu, Jakob B. Pedersen, Mattia Saccoccio, Suzanne Z. Andersen, Kasper Enemark‐Rasmussen, Paul J. Kempen, Christian Danvad Damsgaard, Aoni Xu, Rokas Sažinas, Jon Bjarke Valbæk Mygind, Niklas H. Deissler, Jakob Kibsgaard, Peter C. K. Vesborg, Jens K. Nørskov, Ib Chorkendorff,
Tópico(s): Advanced Photocatalysis Techniques
2024 - Nature Portfolio | Nature
Wanyu Deng, Peng Zhang, Yu Qiao, Georg Kastlunger, Nitish Govindarajan, Aoni Xu, Ib Chorkendorff, Brian Seger, Jinlong Gong,
Abstract The electrochemical reduction of CO has drawn a large amount of attention due to its potential to produce sustainable fuels and chemicals by using renewable energy. However, the reaction’s mechanism is not yet well understood. A major debate is whether the rate-determining step for the generation of multi-carbon products is C-C coupling or CO hydrogenation. This paper conducts an experimental analysis of the rate-determining step, exploring pH dependency, kinetic isotope effects, and the ...
Tópico(s): Advanced battery technologies research
2024 - Nature Portfolio | Nature Communications
Xianbiao Fu, Valerie A. Niemann, Yuanyuan Zhou, Shaofeng Li, Ke Zhang, Jakob B. Pedersen, Mattia Saccoccio, Suzanne Z. Andersen, Kasper Enemark‐Rasmussen, Peter Benedek, Aoni Xu, Niklas H. Deissler, Jon Bjarke Valbæk Mygind, Adam C. Nielander, Jakob Kibsgaard, Peter C. K. Vesborg, Jens K. Nørskov, Thomas F. Jaramillo, Ib Chorkendorff,
Tópico(s): Advanced Photocatalysis Techniques
2023 - Nature Portfolio | Nature Materials
Xianbiao Fu, Jakob B. Pedersen, Yuanyuan Zhou, Mattia Saccoccio, Shaofeng Li, Rokas Sažinas, Katja Li, Suzanne Z. Andersen, Aoni Xu, Niklas H. Deissler, Jon Bjarke Valbæk Mygind, Chao Wei, Jakob Kibsgaard, Peter C. K. Vesborg, Jens K. Nørskov, Ib Chorkendorff,
Ammonia is a critical component in fertilizers, pharmaceuticals, and fine chemicals and is an ideal, carbon-free fuel. Recently, lithium-mediated nitrogen reduction has proven to be a promising route for electrochemical ammonia synthesis at ambient conditions. In this work, we report a continuous-flow electrolyzer equipped with 25-square centimeter-effective area gas diffusion electrodes wherein nitrogen reduction is coupled with hydrogen oxidation. We show that the classical catalyst platinum is ...
Tópico(s): Electrocatalysts for Energy Conversion
2023 - American Association for the Advancement of Science | Science
Angjian Wu, Ji Yang, Bo Xu, Xiaoyu Wu, Yuhang Wang, Xingjie Lv, Yichen Ma, Aoni Xu, Jiageng Zheng, Qinhuai Tan, Yaqi Peng, Zhifu Qi, Haifeng Qi, Jianfeng Li, Yaolin Wang, Jonathan Harding, Xin Tu, Aiqin Wang, Jianhua Yan, Xiaodong Li,
Industrial ammonia synthesis revolutionized global agriculture and industry, but it consumes significant amounts of energy and releases vast quantities of CO2. One alternative, electrocatalytic nitrogen reduction generally suffers from a low ammonia yield rate and poor selectivity. Here, a tandem "plasma-electrocatalysis" strategy was proposed to harvest ammonia from the air. An ammonia yield rate (~1.43 mgNH3 cm-2 h-1) with almost 100% faradaic efficiency was achieved during over 50 hours of stable ...
Tópico(s): Advanced Photocatalysis Techniques
2021 - Elsevier BV | Applied Catalysis B Environment and Energy
Qiucheng Xu, Aoni Xu, Sahil Garg, Asger Barkholt Moss, Ib Chorkendorff, Thomas Bligaard, Brian Seger,
Zero-gap anion exchange membrane (AEM)-based CO2 electrolysis is a promising technology for CO production, however, their performance at elevated current densities still suffers from the low local CO2 concentration due to heavy CO2 neutralization. Herein, via modulating the CO2 feed mode and quantitative analyzing CO2 utilization with the aid of mass transport modeling, we develop a descriptor denoted as the surface-accessible CO2 concentration ([CO2 ]SA ), which enables us to indicate the transient state ...
Tópico(s): Advanced battery technologies research
2022 - Wiley | Angewandte Chemie International Edition
Wenhao Ren, Aoni Xu, Karen Chan, Xile Hu,
The linear scaling relationship of the binding energies of different intermediates limits the catalyst performance in CO2 electroreduction. Here we demonstrate a cation concentration gradient strategy to promote the activity and tune the selectivity of CO2 electroreduction, thereby breaking the scaling relationship. In optimal concentrations of the potassium acetate (KAc) electrolyte, Cu, Ag and In catalysts deliver current densities that are 7.1, 3.2, 2.7 times higher than those obtained in 0.5 ...
Tópico(s): Advanced Thermoelectric Materials and Devices
2022 - Wiley | Angewandte Chemie International Edition
... Ë ÖAEÇÓÉÂÐËÇÏ ÍÄÂÓÍÑÄ Ë ÅÎáÑÐÑÄ.•ÑÕâ ÒÓËÏÇÐâÇÏÞÇ ÒÓË àÕÑÏ ÏÇÕÑAEÞ Ë ÖÓÑÄÇÐß AEÑÔÕËÅÐÖÕÞØ ÓÇÊÖÎßÕÂÕÑÄ ÑÚÇÐß ÓÂÊÐÑÓÑAEÐÞ, ÏÞ ...
Tópico(s): Granular flow and fluidized beds
1995 - Lebedev Physical Institute | Uspekhi Fizicheskih Nauk
Deng Si-qing, Yueying Wu, Qingping Zeng, Aoni Zhang, Meijuan Duan, Min Deng,
Heavy metal (HM) contamination poses a serious threat to safe crop production and human health, and different maize inbred lines respond differently to cadmium (Cd) stress. However, the morphological and physiological characteristics of maize inbred lines seedlings are not clear under Cd stress. In this study, we analyzed the agronomic traits and physiological and biochemical indices of inbred maize seedlings under Cd stress in the seedling stage using the inbred lines Kui3, CML118, Mo17, B73, and ...
Tópico(s): Crop Yield and Soil Fertility
2024 - Multidisciplinary Digital Publishing Institute | Agronomy
Shuangping Han, Chengbing Qin, Yunrui Song, Shuai Dong, Yu Lei, Shen Wang, Xingliang Su, Aoni Wei, Xiangdong Li, Guofeng Zhang, Ruiyun Chen, Jianyong Hu, Liantuan Xiao, Suotang Jia,
Photoblinking and photobleaching are commonly encountered problems for single-photon sources. Numerous methods have been devised to suppress these two impediments; however, either the preparation procedures or the operating conditions are relatively harsh, making them difficult to apply to practical applications. Here, we reported giant suppression of both photoblinking and photobleaching of a single fluorescent molecule, terrylene, via the utilization of hexagonal boron nitride (h-BN) flakes as ...
Tópico(s): Quantum optics and atomic interactions
2021 - American Institute of Physics | The Journal of Chemical Physics
Emmanuel Manalo, Kyoko Watanabe, Chris Sheppard,
... Manalo (emmanuel.manalo@gmail.com) Kyoko Watanabe (watanabekyoko@aoni.waseda.jp) Chris Sheppard (chris@waseda.jp) Faculty ...
Tópico(s): Language, Metaphor, and Cognition
2013 - Wiley | Cognitive Science
Wenhao Ren, Aoni Xu, Karen Chan, Xile Hu,
Abstract The linear scaling relationship of the binding energies of different intermediates limits the catalyst performance in CO 2 electroreduction. Here we demonstrate a cation concentration gradient strategy to promote the activity and tune the selectivity of CO 2 electroreduction, thereby breaking the scaling relationship. In optimal concentrations of the potassium acetate (KAc) electrolyte, Cu, Ag and In catalysts deliver current densities that are 7.1, 3.2, 2.7 times higher than those obtained ...
Tópico(s): Advanced Thermoelectric Materials and Devices
2022 - Wiley | Angewandte Chemie
Junya Morita, Kazuhisa Miwa, Akihiro Maehigashi, Hitoshi Terai, Kazuaki Kojima, Frank E. Ritter,
... Information Science, Nagoya University, Japan Kazuaki Kojima (koj@aoni.waseda.jp) Faculty of Human Sciences, Waseda University, ...
Tópico(s): Cognitive Science and Mapping
2011 - Wiley | Cognitive Science
... Å. ÒÓÇAEÔÇAEÂÕÇÎá ³ÑÄÐÂÓÍÑÏ ª.£.³ÕÂÎËÐÖ "©ÂÒËÔÍÖ Ñ ¤ÎÂÄÍËÔÎÑÓÑAEÇ".£ àÕÑÌ "©ÂÒËÔÍÇ", ÑÚÇÐß ÒÑAEÓÑÃÐÑÌ Ë ÑÃÔÕÑâÕÇÎßÐÑÌ, ÇÔÕß ÔÎÇAEÖáÜËÇ, ÄÇÔßÏ ...
Tópico(s): Airway Management and Intubation Techniques
1994 - Lebedev Physical Institute | Uspekhi Fizicheskih Nauk
Abstract To solve the issue that the characteristic frequencies of the broken rotor bar fault (BRBF) are always submerged by the fundamental component during the stator current spectrum analysis in light loads, this paper proposes an effective approach based on the instantaneous power signal and the local maximum synchrosqueezing transform (LMSST). By multiplying the current and voltage, the instantaneous power signal can provide more fault features and enhance fault component amplitudes. The LMSST ...
Tópico(s): Engineering Diagnostics and Reliability
2023 - IOP Publishing | Journal of Physics Conference Series
Qiucheng Xu, Aoni Xu, Sahil Garg, Asger Barkholt Moss, Ib Chorkendorff, Thomas Bligaard, Brian Seger,
Abstract Zero‐gap anion exchange membrane (AEM)‐based CO 2 electrolysis is a promising technology for CO production, however, their performance at elevated current densities still suffers from the low local CO 2 concentration due to heavy CO 2 neutralization. Herein, via modulating the CO 2 feed mode and quantitative analyzing CO 2 utilization with the aid of mass transport modeling, we develop a descriptor denoted as the surface‐accessible CO 2 concentration ([CO 2 ] SA ), which enables us to indicate ...
Tópico(s): Ionic liquids properties and applications
2022 - Wiley | Angewandte Chemie