Article
Nanoscience & Nanotechnology
Lulu Wen, Xinyang Li, Rui Zhang, Huawei Liang, Qitao Zhang, Chenliang Su, Yu-Jia Zeng
Summary: Introducing oxygen vacancies is considered an effective method to accelerate the nitrogen reduction reaction, and Zn-Co3O4 nanopolyhedrons with abundant oxygen vacancies and high catalytic performance have been successfully prepared in this study. The catalyst shows high ammonia yield and faradaic efficiency, as well as excellent stability.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Na Cao, Zengxi Wei, Jie Xu, Jun Luo, Anxiang Guan, Abdullah M. Al-Enizi, Jianmin Ma, Gengfeng Zheng
Summary: The study demonstrated the successful development of a bi-metallic Sn-Ti structure in TiO2 for efficient electrocatalytic N-2 fixation, highlighting the potential of atomic-scale designing and constructing bimetallic active sites.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Applied
Yanan Zhang, Yanpeng Liu, Zhenhua Liu, Xiaogang Wu, Yuxiang Wen, Hangda Chen, Xia Ni, Guohan Liu, Juanjuan Huang, Shanglong Peng
Summary: The nitrogen-doped MnO2@N cathode prepared through defect engineering greatly improves the cycle stability of manganese-based aqueous zinc-ion batteries by enhancing conductivity and electrochemical stability, leading to a high capacity retention rate. In addition, nitrogen doping promotes the diffusion of H+ and Zn(2+), resulting in enhanced battery performance.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Yuxiang Li, Yi Liang, Heen Li, Bo Wang, Huanhuan You, Yuanzhe Wang, Yunpeng Cao, Wenjing Dai, Faming Gao
Summary: The design of multifunctional composite catalysts has improved the performance of electrochemical nitrogen reduction reaction (eNRR), leading to increased ammonia (NH3) yield and Faradaic efficiency.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yangsen Xu, Xi Xu, Ning Cao, Xianfen Wang, Xuehua Liu, Marco Fronzi, Lei Bi
Summary: This study utilized Sr as a dopant for LaFeO3 to create oxygen vacancies, forming Sr-doped LFO perovskite oxide, which exhibited superior NH3 yield and faradic efficiency as a catalyst compared to other materials. The N-15 isotope labeling method confirmed the catalyst's ability to convert N-2 into NH3 under electrolysis conditions. First principle calculations revealed that the introduction of oxygen vacancies significantly accelerated the overall nitrogen reduction reaction process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Mengzhao Zhang, Hanqing Yin, Fuhao Jin, Jingquan Liu, Xuqiang Ji, Aijun Du, Wenrong Yang, Zhen Liu
Summary: Nb-based MXenes are developed to enhance the NRR activity and achieve efficient conversion of nitrogen into ammonia through the engineering of the stretched 3D structure and oxygen vacancies. The catalysts show high ammonia production rate and excellent Faradic efficiency, and the selectivity is attributed to the unique structure including layered graphitic structure, reactive oxygen vacancies, and expanded interlayer space.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Physical
Pandiyarajan Anand, Dhayanantha Prabu Jaihindh, Wen-Ku Chang, Yen-Pei Fu
Summary: This study focused on the synthesis of Ca-doped narrow bandgap BiFeO3 perovskite via a simple auto combustion method, demonstrating its excellent performance in oxygen evolution reactions (OER) and wastewater treatment. By doping Ca2+ into the structure, oxygen vacancies were created and the valence state of Fe3+ was modified. The material showed promising results in the photocatalytic reduction of Cr(VI) and exhibited enhanced electrochemical OER activities in both acidic and alkaline conditions.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Minghua He, Zulhumar Turup, Xuekun Jin, Fengjuan Chen
Summary: Ag nanoparticles supported by MnO2 nanorods were successfully synthesized as efficient oxygen reduction reaction (ORR) electrocatalysts with comparable catalytic activity to commercial Pt/C catalysts. The excellent catalytic performances are attributed to the abundant oxygen vacancies and Mn3+ species on the MnO2 surface, as well as the synergistic effect between MnO2 substrates and Ag nanoparticles, providing guidance for the design of efficient Mn-based ORR electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Xiaoye Du, Yanyang Qin, Bo Gao, Ke Wang, Dan Li, Yanhuai Li, Shujiang Ding, Zhongxiao Song, Yaqiong Su, Chunhui Xiao
Summary: This study demonstrated a facile and controllable method using magnetron sputtering to introduce oxygen vacancies in In2O3 films for efficient formic acid production. Density functional theory calculations indicated that the high yield of C1 products was mainly attributed to the increased surface electronic density.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Wenyi Li, Yixing Ye, Meng Jin, Shengbo Zhang, Chuhong Lin, Chenghua Sun, Yunxia Zhang, Guozhong Wang, Changhao Liang, Haimin Zhang
Summary: A fluidized electrocatalysis system using V2O5 nanodots dispersed in aqueous electrolyte is reported for efficient ambient electrocatalytic nitrogen reduction reaction and nitrogen oxidation reaction. The fluidized approach with V2O5 nanodots catalyst exhibits superior bifunctional activities, yielding high ammonia and nitrate production with good faradaic efficiency. The abundant oxygen vacancies in V2O5 nanodots are identified as the source of its high activity, which is confirmed by DFT calculations.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Shuang Han, Xiumei Wei, Yuhong Huang, Jianmin Zhang, Jian Yang, Zhenduo Wang
Summary: This study systematically investigates the catalytic performance of 3d transition metal atoms on a C2N monolayer, and finds that the structure with B and Ti co-doping has high electrocatalytic activity and a low limiting potential.
Article
Chemistry, Physical
Junting Sun, Yukan Yang, Jing Wang, Bin Lu, Junjie Guo
Summary: The configuration of nitrogen in carbon composite catalyst was regulated with an ammonia assisted in-situ pyrolysis method, affecting the percentage of C = N formed between glucose and urea during the hydrothermal process and the types of nitrogen in the obtained Co3O4/NPC. The addition of ammonia not only increased the percentage of pyridinic-N combined with homogeneously dispersed Co3O4, but also enhanced the catalytic performance of Co3O4/NPC-2 compared to Co3O4/NPC-0.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Chuang Wang, Liang-Liang Gu, Sheng-You Qiu, Jian Gao, Yong-Chao Zhang, Ke-Xin Wang, Ji-Jun Zou, Peng-Jian Zuo, Xiao-Dong Zhu
Summary: The study demonstrates the excellent activity and stability of the hollow bimetallic CoFe2O4 nanocube in nitrogen reduction reaction, attributed to improved nitrogen adsorption and activation, unoccupied d orbitals of transition metal components, reformed electronic structure by oxygen vacancies, and electron injection facilitated by conductive carbon wrapper. Both experimental and theoretical investigations confirm the mechanism underlying the enhancement in catalytic activity, making the design strategy of C@CoFe2O4-x nanocube efficient and valid.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Review
Chemistry, Applied
Qi-Ni Zhan, Ting -Yu Shuai, Hui -Min Xu, Chen-Jin Huang, Zhi-Jie Zhang, Gao-Ren Li
Summary: This review introduces various methods for preparing single-atom catalysts and discusses their electrocatalytic applications. The future challenges and prospects of monatomic catalysts are also discussed.
CHINESE JOURNAL OF CATALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Yujin Jeong, Gnanaprakasam Janani, Dohun Kim, Tae-Yong An, Subramani Surendran, Hyunjung Lee, Dae Jun Moon, Joon Young Kim, Mi-Kyung Han, Uk Sim
Summary: The utilization of ammonia as a hydrogen carrier shows promise in the development of next-generation refueling stations. By controlling the synergistic interaction between metal and semiconductor and introducing Cu vacancies, the electrochemical nitrogen reduction reaction (ENRR) performance can be significantly improved, leading to higher NH3 production.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Meng Yu, Li Wang, Jieyu Liu, Hui Li, Xiuyao Lang, Chunning Zhao, Zhanglian Hong, Weichao Wang
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Chemistry, Physical
Tong Zhang, Xiuyao Lang, Anqi Dong, Xiang Wan, Gao Shan, Li Wang, Linxia Wang, Weichao Wang
Article
Chemistry, Physical
Anqi Dong, Shan Gao, Xiang Wan, Linxia Wang, Tong Zhang, Li Wang, Xiuyao Lang, Weichao Wang
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Article
Engineering, Environmental
Xiang Wan, Li Wang, Shan Gao, Xiuyao Lang, Linxia Wang, Tong Zhang, Anqi Dong, Weichao Wang
Summary: The ternary mullite SmMn2O5 has been successfully developed as a high-efficient oxide catalyst for benzene and toluene oxidation at low temperatures through a combination of experimental characterizations and density functional theory calculations. This catalyst shows remarkable deep oxidation performance and good stability, making it superior to most reported oxide catalysts. The discovery of the active oxygen species on the surface of the material provides crucial insights for understanding the catalytic oxidation of metal oxides at the atomic level.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Dewang Li, Xiuyao Lang, Yong Guo, Yiqiao Wang, Yanyin Wang, Hucheng Shi, Shichao Wu, Weichao Wang, Quan-Hong Yang
Summary: The bifunctional CeVO4 catalyst has successfully reduced the charge potential of Li-O2 batteries, promoted the efficient conversion of oxidative intermediates, and improved the battery's charge-discharge capacity and cycling performance. Through electrochemical reduction and chemical disproportionation reactions, the CeVO4 catalyst efficiently adsorbs and converts superoxide species, breaking through the limitations of photo-assisted cathodes.
Article
Chemistry, Multidisciplinary
Li Wang, Wuxing Hua, Xiang Wan, Ze Feng, Zhonghao Hu, Huan Li, Juntao Niu, Linxia Wang, Ansheng Wang, Jieyu Liu, Xiuyao Lang, Geng Wang, Weifang Li, Quan-Hong Yang, Weichao Wang
Summary: This study seeks an electrochemical catalyst for the liquid-to-solid conversion of soluble lithium polysulfides in lithium-sulfur batteries. The use of Mn-based mullite catalyst enhances the performance of the sulfur redox reaction and inhibits the shuttle effect. Theoretical calculations and experimental results demonstrate the effective coupling between the catalyst and polysulfides, leading to improved cycling stability and areal capacity in the Li-S battery.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Huimin Liu, Xiuyao Lang, Chao Zhu, Janis Timoshenko, Martina Ruescher, Lichen Bai, Nestor Guijarro, Haibo Yin, Yue Peng, Junhua Li, Zheng Liu, Weichao Wang, Beatriz Roldan Cuenya, Jingshan Luo
Summary: This study demonstrates a novel electrocatalyst for the electrochemical nitrate reduction reaction (NITRR), which can efficiently produce ammonia with high efficiency. The synergistic catalytic cooperation between Rh and Cu sites enables high activity and high yield of ammonia production.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Multidisciplinary Sciences
Yeonghun Lee, Yaoqiao Hu, Xiuyao Lang, Dongwook Kim, Kejun Li, Yuan Ping, Kai-Mei C. Fu, Kyeongjae Cho
Summary: Solid state quantum defects are promising candidates for scalable quantum information systems and can be seamlessly integrated with conventional semiconductor electronic devices. A promising defect family for spin qubit realization has been discovered in 2D semiconductors.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Matthew Bergschneider, Nickolas Ashburn, Xiuyao Lang, Andrew C. C. Kummel, Kyeongjae Cho
Summary: Density functional theory (DFT) simulations were used to investigate the surface reaction mechanisms of selective deposition of Ru metal using Ru(EtCp)(2) and O-2 as reactants. The study found that the ALD processes were limited by the strong interaction between the aromatic ring and the metallic surface. Introducing atomic H as a nonoxidizing co-reactant gas can overcome these limitations by saturating the Cp pi-bonds and weakening the bonds to the Ru surface. This study aims to provide a comprehensive understanding of leveraging ligand-surface, surface-hydrogen, and ligand-hydrogen interactions for oxygen-free ALD with the Ru(EtCp)(2) precursor at moderate to low temperatures.
Article
Chemistry, Physical
Kun Du, Xiuyao Lang, Yuanyuan Yang, Chuanqi Cheng, Ning Lan, Kangwen Qiu, Jing Mao, Weichao Wang, Tao Ling
Summary: Electrochemical reduction reaction of nitrogen (NRR) is a promising pathway for ammonia (NH3) production from renewable energy. The chemical inertness of N-2 hinders the development of this process. The formation of hydrogen species on the surface of electrocatalysts has been proposed to enhance NRR, but the atomic level connection between hydrogenation behavior and NRR performance is still lacking.
Article
Chemistry, Physical
Kun Du, Xiuyao Lang, Yuanyuan Yang, Chuanqi Cheng, Ning Lan, Kangwen Qiu, Jing Mao, Weichao Wang, Tao Ling
Summary: Electrochemical reduction reaction of nitrogen (NRR) is a promising way to produce ammonia (NH3) from renewable energy. However, the chemical inertness of N-2 has hindered the development of this process. Recent research suggests that hydrogen species formed on the surface of electrocatalysts can enhance NRR. However, the atomic-level connection between the hydrogenation behavior of electrocatalysts and NRR performance is still lacking. This study provides an understanding of the hydrogenation behavior of a highly twinned ZnSe nanorod and the activation of N-2 molecules on its surface, paving the way for engineering electrocatalysts for green and sustainable NH3 production.
Review
Chemistry, Multidisciplinary
Shan Gao, Li Wang, Chunning Zhao, Ansheng Wang, Xiuyao Lang, Zunfeng Liu, Weichao Wang
Summary: The importance of accurate structure-property relationship in designing electrocatalysts for energy conversion and storage devices is emphasized. It is crucial to consider a dynamic catalytic theory to accurately describe the structure-property. The concept of LFCC and cooperative effects of ligand units are introduced to provide insights into the design of future oxide catalysts.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Zhe Li, Yi Feng, Xiuyao Lang, Wenjing Kang, Jing Mao, Gurong Shen, Hui Liu, Cunku Dong, Weichao Wang, Xiwen Du
Summary: In this study, a core-shell structure (Ag@Co3O4) was used to modify the valence state of cobalt cations, leading to a volcano relationship between the valence state of Co sites and OER activity, with the lowest overpotential achieved at 212 mV@10 mA cm(-2).
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Li Wang, Hui Li, Jieyu Liu, Xiuyao Lang, Weichao Wang
Summary: The current understanding of the oxygen reduction reaction (ORR) mechanism can be categorized into two types: adsorbate evolving mechanism (AEM) and lattice oxygen-mediated mechanism (LOM). However, these mechanisms may not accurately describe the ORR process for more complex metallic oxides due to the variability of oxygen environment on catalyst surfaces.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)