Article
Chemistry, Physical
Mengwei Li, Junjun Shan, Georgios Giannakakis, Mengyao Ouyang, Sufeng Cao, Sungsik Lee, Lawrence F. Allard, Maria Flytzani-Stephanopoulos
Summary: In this work, a one-step conversion of methane to methanol using molecular oxygen as the oxidant in aqueous solutions with the presence of CO on copper or palladium-promoted Ir-ZSM-5 catalyst is reported. The addition of a second metal to Ir-ZSM-5 enhances catalyst activity and tunes product selectivity. The trimetallic system IrCuPd shows the best performance for methanol formation with good stability in cyclic operation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Review
Materials Science, Multidisciplinary
Jing Tang, Yifan Wu, Xun Li, Lihong Bu, Baisong Chang
Summary: Fe-based single-atom catalysts (SACs) with atomically dispersed Fe atom active centers exhibit excellent catalytic properties and hold promise for high-performance nanozymes in biocatalytic medicine. The synthesis, characterization, and mass-production of Fe-SACs with high loading are of significant importance. Recent experimental and theoretical progress has provided evidence for understanding the structure-activity relationship and catalytic mechanisms of Fe-SACs. This review summarizes the synthesis methods, characterization techniques, and the influence of support materials on the activity, selectivity, and stability of Fe-SACs. Applications of Fe-SACs in biosensing and disease treatments are also discussed. Current challenges and future perspectives for the development of Fe-SACs in nanomedicine are outlined.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Long Lin, Haobo Li, Yi Wang, Hefei Li, Pengfei Wei, Bing Nan, Rui Si, Guoxiong Wang, Xinhe Bao
Summary: In this study, the temperature-dependent CO2 reduction reactions over Fe-N-C and Ni-N-C single-atom catalysts were investigated, revealing variations in selectivity and activity. The differences in CO Faradaic efficiency and current density between Fe-N-C and Ni-N-C catalysts at different temperatures were found to be attributed to the varied adsorption strength of key reaction intermediates during CO2RR.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Multidisciplinary
Jiheon Kim, Ji Mun Yoo, Hyeon Seok Lee, Yung-Eun Sung, Taeghwan Hyeon
Summary: This review highlights recent advances in M-N-C catalysts in terms of atomic-level understanding and design of mononuclear active sites, the effect of the porous carbon structure on the electrocatalytic performance, and improving catalytic stability, and suggests future directions to enhance M-N-C catalysts for highly active and stable PEMFC performance.
TRENDS IN CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Xin Zhou, Imgon Hwang, Ondrej Tomanec, Dominik Fehn, Anca Mazare, Radek Zboril, Karsten Meyer, Patrik Schmuki
Summary: Single atom catalysis has become a leading field in heterogeneous catalysis, electrocatalysis, and more recently in photocatalysis. A novel approach to trap and stabilize single atoms on a widely used photocatalyst platform has been introduced, showing higher photocatalytic activity compared to classic co-catalyst arrangements. Stably trapped single atoms provide the majority of photocatalytic reactivity, with high turnover frequencies despite being a small fraction of the initial load.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xiaoli Jiang, Lei Tang, Lei Dong, Xuedi Sheng, Wenfei Zhang, Zhen Liu, Jianhua Shen, Hongliang Jiang, Chunzhong Li
Summary: In this study, density functional theory (DFT) simulations were used to investigate the site isolation strategy in electrocatalytic selective hydrogenation of acetylene. The results showed that isolated Cu metal sites have higher energy barriers on overhydrogenation and C-C coupling reactions. Based on this, Cu single-atom catalysts highly dispersed on nitrogen-doped carbon matrix were developed and demonstrated high ethylene selectivity under high concentrations of acetylene. The superior performance was attributed to the weak adsorption of ethylene intermediates and highly energy barriers on C-C coupling at isolated sites, as confirmed by both DFT calculations and experimental results. This study provides a comprehensive understanding of the isolated sites inhibiting the side reactions in electrocatalytic acetylene semihydrogenation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Tong Li, Siyuan Ren, Cheng Zhang, Lingxia Qiao, Jiang Wu, Ping He, Jia Lin, Yongsheng Liu, Zaiguo Fu, Qunzhi Zhu, Weiguo Pan, Baofeng Wang, Zhongwei Chen
Summary: This study successfully developed single-atom cobalt embedded in N-doped carbon nanoboxes as high-efficiency bifunctional electrocatalysts for overall water splitting in alkaline/acidic electrolytes. The presence of Co atoms induced the formation of pyrr-N and possessed Co@CNB-N4 configuration with high electrocatalytic activity. This work is important for understanding the impact of metal single atoms and substrate configuration on catalytic performance and for the successful synthesis of high-loading non-precious metal single-atom catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Shun Wu, Huibin Liu, Guangyu Lei, Hongwei He, Jiawen Wu, Guoliang Zhang, Fengbao Zhang, Wenchao Peng, Xiaobin Fan, Yang Li
Summary: The requirement of sustainable energy is crucial for easing the energy shortage crisis. The development of efficient, stable, and noble-metal-free ORR electrocatalysts is a significant challenge. In this study, an atomically dispersed Fe and N co-doped hierarchically porous carbon catalyst with excellent ORR performance was reported. The catalyst exhibited a lower half-wave potential and higher current density compared to commercial Pt/C catalyst.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Zhao Li, Rui Wu, Shuhao Xiao, Yongchao Yang, Leo Lai, Jun Song Chen, Yuan Chen
Summary: This study focused on modifying FeN4 sites in Fe-N-C single-atom catalysts by introducing axial chlorine atoms, which led to improved activity and selectivity in electrochemical CO2 reduction reactions. The optimized FeN4Cl/NC catalyst exhibited high CO Faradaic efficiency, current density, and turnover frequency, making it one of the best Fe-based CO2RR catalysts reported to date. Furthermore, FeN4Cl/NC was successfully utilized as a bifunctional catalyst for rechargeable zinc-CO2 batteries, showcasing excellent stability and power density.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Yuhui Zhang, Boyang Li, Yaqiong Su
Summary: In this study, the potential of p-block main-group Sn-based SACs as a cost-effective and efficient alternative to platinum-based catalysts for the ORR was investigated. The research employed density functional theory (DFT) calculations to explore the catalyst properties, ORR mechanism, and electrocatalytic performance of Sn-based N-doped graphene SACs. The results provided a comprehensive understanding of the active structure and high four-electron reactivity of Sn-based N-doped graphene electrocatalysts.
Article
Engineering, Environmental
Shunjiang Huang, Bin Hu, Shuangrun Zhao, Shuai Zhang, Minghua Wang, Qiaojuan Jia, Linghao He, Zhihong Zhang, Miao Du
Summary: A series of Fe-N-C single atom catalysts embedded in the carbon nitride network effectively degrade the organic dye Malachite green, showing enhanced photocatalytic performance. The mesoporous Fe-N-C/CNx hybrids obtained by pyrolysis at 700 degrees Celsius exhibit high removal efficiency towards Malachite green under visible light, with good reproducibility and stability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Xinyan Zhou, Jin Hao, Yilin Kong, Runsheng Xu
Summary: An iron-catalyzed cascade reaction allows for the synthesis of various derivatives under mild conditions, providing an economical approach for C(sp(3))-Se bond formation starting from 1,2,3,4-tetrahydroisoquinolines and 2-hydroselenobenzoic acids.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yihui Li, Ziang Zhao, Wei Lu, Hejun Zhu, Fanfei Sun, Bingbao Mei, Zheng Jiang, Yuan Lyu, Xingkun Chen, Luyao Guo, Tong Wu, Xinzheng Ma, Yu Meng, Yunjie Ding
Summary: Designing efficient non-precious metal catalysts for CO2 hydrogenation is a significant challenge. Cobalt-based catalysts often failed to catalyze the reverse water-gas shift (RWGS) reaction with high CO selectivity and stability. This study provided a new strategy for designing Co-based RWGS catalysts with excellent performance.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Jiangwei Chang, Qi Zhang, Jingkun Yu, Wen Jing, Siyang Wang, Guangchao Yin, Geoffrey I. N. Waterhouse, Siyu Lu
Summary: A Fe single atom seed-mediated strategy is reported for the fabrication of Fe3C species closely surrounded by Fe-N-4-C active sites with strong electronic interactions built between them. The compositionally-optimized Fe-N-C/Fe3C-op electrocatalyst shows a small voltage difference between the ORR half-wave and OER potential, making it one of the best bifunctional OER/ORR benchmarks. Assembled zinc-air batteries with Fe-N-C/Fe3C-op as the air cathode exhibit remarkable specific capacity and power density, along with excellent long-term durability. This work extends the methodology for modulating the activity of Fe-N-4-C atomic site, inspiring further exploration in the design of bifunctional oxygen electrocatalysts.
Article
Chemistry, Multidisciplinary
Reeya Garg, Mohit Jaiswal, Kaustubh Kumar, Komalpreet Kaur, Bhawna Rawat, Kamalakannan Kailasam, Ujjal K. Gautam
Summary: This study investigates an efficient composite material based on carbon nanostructures and non-noble metals, which exhibits high half-wave potential and electrocatalytic performance. The enhanced activity is attributed to the synergistic effect of high conductivity of carbon nanotubes and active Fe sites. In situ growth of CNTs prevents mass loss during catalyst material synthesis.
Article
Physics, Applied
Amitesh Paul, Jian-Guo Zheng, Toshihiro Aoki
JOURNAL OF APPLIED PHYSICS
(2017)
Article
Multidisciplinary Sciences
C. L. Prajapat, Surendra Singh, D. Bhattacharya, G. Ravikumar, S. Basu, S. Mattauch, Jian-Guo Zheng, T. Aoki, Amitesh Paul
SCIENTIFIC REPORTS
(2018)
Article
Chemistry, Multidisciplinary
Rajasekharreddy Pala, Ashraf M. Mohieldin, Kiumars Shamloo, Rinzhin T. Sherpa, Sarmed H. Kathem, Jing Zhou, Zhongyue Luan, Jian-Guo Zheng, Amir Ahsan, Surya M. Nauli
Article
Chemistry, Multidisciplinary
Rajasekharreddy Pala, Ashraf M. Mohieldin, Rinzhin T. Sherpa, Sarmed H. Kathem, Kiumars Shamloo, Zhongyue Luan, Jing Zhou, Jian-Guo Zheng, Amir Ahsan, Surya M. Nauli
Article
Chemistry, Physical
Alex Abelson, Caroline Qian, Trenton Salk, Zhongyue Luan, Kan Fu, Jian-Guo Zheng, Jenna L. Wardini, Matt Law
Article
Physics, Applied
L. Ma, H. R. Fu, M. Tang, X. P. Qiu, Z. Shi, C. Y. You, N. Tian, Jian-Guo Zheng
APPLIED PHYSICS LETTERS
(2020)
Article
Biochemistry & Molecular Biology
Sheng Zhang, Gretchen Guaglianone, Michael A. Morris, Stan Yoo, William J. Howitz, Li Xing, Jian-Guo Zheng, Hannah Jusuf, Grace Huizar, Jonathan Lin, Adam G. Kreutzer, James S. Nowick
Summary: Fluorescent derivatives of beta-amyloid peptides are useful for studying interactions with cells. This study presents a method for expressing N-terminal cysteine Aβ peptides and conjugating them with fluorophores or biotin, yielding labeled Aβ peptides that behave similarly to unlabeled ones. The labeled Aβ peptides were successfully used in interactions with mammalian cells and bacteria, demonstrating their potential as valuable tools for researchers.
Article
Physics, Applied
Qian Chen, Lulu Cao, Jinji Li, Qiang Fu, Yonghui Zhu, Qingjie Guo, Ruobai Liu, Tian Li, Wen Zhang, Jun Du, Jianguo Zheng, Zhaocong Huang, Ping Kwan Johnny Wong, Bin Fang, Zhongming Zeng, Ya Zhai
Summary: A reliable method to enhance the spin mixing conductance at the ferromagnetic/non-magnetic material interface through rare-earth doping in the non-magnetic layer is reported. The doping of rare-earth enables effective tuning of the interface, leading to improved spin injection and manipulation efficiency.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Composites
Dhruva Nathan, Atharva Deo, Kevin Haughn, Suin Yi, Jungmin Lee, Dawei Gao, Rahul Shenoy, Mingjie Xu, Ich C. Tran, Jian-Guo Zheng, Zixuan Rong, Mingyu Wang, Christopher M. Shaffer, Chen Wu, Tanay Topac, Xiyuan Chen, Lei He, Fu-Kuo Chang, R. Stanley Williams, Daniel J. Inman, Yong Chen
Summary: Unlike computers, the human brain can learn and adapt in real-time, but computers perform better in specific tasks. This research developed a self-programming neuromorphic integrated circuit using synaptic resistors, which can execute inference and learning algorithms in real-time and improve efficiency in complex environments.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dawei Gao, Rahul Shenoy, Suin Yi, Jungmin Lee, Mingjie Xu, Zixuan Rong, Atharva Deo, Dhruva Nathan, Jian-Guo Zheng, R. Stanley Williams, Yong Chen
Summary: This research presents a crossbar circuit of synaptic resistors (synstors) that can process signals and learn concurrently in real time. The synstor circuit outperforms an ANN running on computers in terms of learning speed, performance, power consumption, and adaptability to changing environments, and can fly drones to a target position faster than human controllers without prior training.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sheng Jiang, Zhaocong Huang, Qi An, Wen Zhang, Yuli Yin, Dong Zhang, Jun Du, Biao You, Jian-Guo Zheng, Wenqing Liu, Ya Zhai
Summary: The significance of spin transport over an interface in energy-efficient spintronic devices has been studied. The investigation of permalloy/Cu1???xTbx (Py/Cu-Tb) interfaces reveals that the thickness of the Cu-Tb layer affects the saturation magnetization of the bilayers and leads to the formation of a self-assembled antiferromagnetic interface. Parameters such as spin mixing conductance, spin diffusion length, and damping can be controlled by inserting a thin Cu layer or varying the compositions of Cu-Tb alloys.
Article
Chemistry, Physical
Renbing Tian, Shiyan Wang, Xuefeng Hu, Jian-Guo Zheng, Peng Ji, Jun Lin, Jing Zhang, Mingjie Xu, Jun Bao, Shouwei Zuo, Hui Zhang, Wei Zhang, Jinlan Wang, Liandong Yu
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Chemistry, Physical
Junjun Xue, Qing Cai, Baohua Zhang, Mei Ge, Dunjun Chen, Jianguo Zheng, Ting Zhi, Zhikuo Tao, Jiangwei Chen, Lianhui Wang, Rong Zhang, Youdou Zheng
APPLIED SURFACE SCIENCE
(2017)
Article
Chemistry, Multidisciplinary
Wen Zhang, Ping Kwan Johnny Wong, Dong Zhang, Jinjin Yue, Zhaoxia Kou, Gerrit van der Laan, Andreas Scholl, Jian-Guo Zheng, Zuhong Lu, Ya Zhai
ADVANCED FUNCTIONAL MATERIALS
(2017)