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Guo L, Song Y, Wang B, Cong R, Zhao L, Zhang S, Li L, Wu W, Wang S, San X, Pan C, Yang Z. Surface Passivation to Enhance the Interfacial Pyro-Phototronic Effect for Self-Powered Photodetection Based on Perovskite Single Crystals. ACS Appl Mater Interfaces 2024; 16:16482-16493. [PMID: 38506366 DOI: 10.1021/acsami.4c00302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
The interfacial pyro-phototronic effect (IPPE) presents a novel approach for improving the performance of self-powered photodetectors (PDs) based on metal halide perovskites (MHPs). The interfacial contact conditions within the Schottky junctions are crucial in facilitating the IPPE phenomenon. However, the fabrication of an ideal Schottky junction utilizing MHPs is a challenging endeavor. In this study, we present a surface passivation method aimed at enhancing the performance of self-powered photodetectors based on inverted planar perovskite structures in micro- and nanoscale metal-halide perovskite SCs. Our findings demonstrate that the incorporation of a lead halide salt with a benzene ring moiety for surface passivation leads to a substantial improvement in photoresponses by means of the IPPE. Conversely, the inclusion of an alkane chain in the salt impedes the IPPE. The underlying mechanism can be elucidated through an examination of the band structure, particularly the work function (WF) modulated by surface passivation. Consequently, this alteration affects the band bending and the built-in field (VBi) at the interface. This strategy presents a feasible and effective method for producing interfacial pyroelectricity in MHPs, thus facilitating its potential application in practical contexts such as energy conversion and infrared sensors.
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Affiliation(s)
- Linjuan Guo
- Hebei Key Laboratory of Photo-Electricity Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China
| | - Yi Song
- Hebei Key Laboratory of Photo-Electricity Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China
| | - Baorong Wang
- Hebei Key Laboratory of Photo-Electricity Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China
| | - Ridong Cong
- Hebei Key Laboratory of Photo-Electricity Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China
| | - Lei Zhao
- Hebei Key Laboratory of Photo-Electricity Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China
| | - Suheng Zhang
- Hebei Key Laboratory of Photo-Electricity Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China
| | - Leipeng Li
- Hebei Key Laboratory of Photo-Electricity Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China
- Institute of Life Science and Green Development, Hebei University, Baoding 071002, P. R. China
| | - Wenqiang Wu
- Institute of Atomic Manufacturing, Beihang University, Beijing 100191, P. R. China
| | - Shufang Wang
- Hebei Key Laboratory of Photo-Electricity Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China
| | - Xingyuan San
- Hebei Key Laboratory of Photo-Electricity Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China
| | - Caofeng Pan
- Institute of Atomic Manufacturing, Beihang University, Beijing 100191, P. R. China
| | - Zheng Yang
- Hebei Key Laboratory of Photo-Electricity Information and Materials, National & Local Joint Engineering Laboratory of New Energy Photoelectric Devices, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China
- Institute of Life Science and Green Development, Hebei University, Baoding 071002, P. R. China
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2
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San X, Hu J, Chen M, Niu H, Smeets PJM, Malliakas CD, Deng J, Koo K, Dos Reis R, Dravid VP, Hu X. Unlocking the mysterious polytypic features within vaterite CaCO 3. Nat Commun 2023; 14:7858. [PMID: 38030637 PMCID: PMC10687017 DOI: 10.1038/s41467-023-43625-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 11/15/2023] [Indexed: 12/01/2023] Open
Abstract
Calcium carbonate (CaCO3), the most abundant biogenic mineral on earth, plays a crucial role in various fields such as hydrosphere, biosphere, and climate regulation. Of the four polymorphs, calcite, aragonite, vaterite, and amorphous CaCO3, vaterite is the most enigmatic one due to an ongoing debate regarding its structure that has persisted for nearly a century. In this work, based on systematic transmission electron microscopy characterizations, crystallographic analysis and machine learning aided molecular dynamics simulations with ab initio accuracy, we reveal that vaterite can be regarded as a polytypic structure. The basic phase has a monoclinic lattice possessing pseudohexagonal symmetry. Direct imaging and atomic-scale simulations provide evidence that a single grain of vaterite can contain three orientation variants. Additionally, we find that vaterite undergoes a second-order phase transition with a critical point of ~190 K. These atomic scale insights provide a comprehensive understanding of the structure of vaterite and offer advanced perspectives on the biomineralization process of calcium carbonate.
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Affiliation(s)
- Xingyuan San
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Hebei University, Baoding, 071002, China
| | - Junwei Hu
- State Key Laboratory of Solidification Processing, International Center for Materials Discovery, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Mingyi Chen
- State Key Laboratory of Solidification Processing, International Center for Materials Discovery, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Haiyang Niu
- State Key Laboratory of Solidification Processing, International Center for Materials Discovery, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China.
| | - Paul J M Smeets
- Department of Materials Science and Engineering, The NUANCE Center, Northwestern University, Evanston, IL, 60208, USA
| | | | - Jie Deng
- Department of Geosciences, Princeton University, Princeton, NJ, 08544, USA
| | - Kunmo Koo
- Department of Materials Science and Engineering, The NUANCE Center, Northwestern University, Evanston, IL, 60208, USA
| | - Roberto Dos Reis
- Department of Materials Science and Engineering, The NUANCE Center, Northwestern University, Evanston, IL, 60208, USA
| | - Vinayak P Dravid
- Department of Materials Science and Engineering, The NUANCE Center, Northwestern University, Evanston, IL, 60208, USA.
| | - Xiaobing Hu
- Department of Materials Science and Engineering, The NUANCE Center, Northwestern University, Evanston, IL, 60208, USA.
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3
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Li Y, Bai X, Yuan D, Yu C, San X, Guo Y, Zhang L, Ye J. Cu-based high-entropy two-dimensional oxide as stable and active photothermal catalyst. Nat Commun 2023; 14:3171. [PMID: 37264007 DOI: 10.1038/s41467-023-38889-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 05/19/2023] [Indexed: 06/03/2023] Open
Abstract
Cu-based nanocatalysts are the cornerstone of various industrial catalytic processes. Synergistically strengthening the catalytic stability and activity of Cu-based nanocatalysts is an ongoing challenge. Herein, the high-entropy principle is applied to modify the structure of Cu-based nanocatalysts, and a PVP templated method is invented for generally synthesizing six-eleven dissimilar elements as high-entropy two-dimensional (2D) materials. Taking 2D Cu2Zn1Al0.5Ce5Zr0.5Ox as an example, the high-entropy structure not only enhances the sintering resistance from 400 °C to 800 °C but also improves its CO2 hydrogenation activity to a pure CO production rate of 417.2 mmol g-1 h-1 at 500 °C, 4 times higher than that of reported advanced catalysts. When 2D Cu2Zn1Al0.5Ce5Zr0.5Ox are applied to the photothermal CO2 hydrogenation, it exhibits a record photochemical energy conversion efficiency of 36.2%, with a CO generation rate of 248.5 mmol g-1 h-1 and 571 L of CO yield under ambient sunlight irradiation. The high-entropy 2D materials provide a new route to simultaneously achieve catalytic stability and activity, greatly expanding the application boundaries of photothermal catalysis.
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Affiliation(s)
- Yaguang Li
- Research Center for Solar Driven Carbon Neutrality, Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China.
- College of Mechanical and Electrical Engineering, Key Laboratory Intelligent Equipment and New Energy Utilization of Livestock and Poultry Breeding, Hebei Agricultural University, Baoding, 071001, China.
| | - Xianhua Bai
- Research Center for Solar Driven Carbon Neutrality, Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Dachao Yuan
- College of Mechanical and Electrical Engineering, Key Laboratory Intelligent Equipment and New Energy Utilization of Livestock and Poultry Breeding, Hebei Agricultural University, Baoding, 071001, China
| | - Chenyang Yu
- Research Center for Solar Driven Carbon Neutrality, Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Xingyuan San
- Research Center for Solar Driven Carbon Neutrality, Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Yunna Guo
- Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China
| | - Liqiang Zhang
- Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, China.
| | - Jinhua Ye
- Research Center for Solar Driven Carbon Neutrality, Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China.
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
- Graduate School of Chemical Science and Engineering, Hokkaido University, Sapporo, 060-0814, Japan.
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Guo J, Li W, Xu Y, Mao Y, Mei Z, Li H, He Y, San X, Xu K, Liang X. Ionic Covalent Organic Frameworks-Derived Cobalt Single Atoms and Nanoparticles for Efficient Oxygen Electrocatalysis. Small Methods 2023; 7:e2201371. [PMID: 36585369 DOI: 10.1002/smtd.202201371] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 12/13/2022] [Indexed: 06/17/2023]
Abstract
Metal single atoms show outstanding electrocatalytic activity owing to the abundant atomic reactive sites and superior stability. However, the preparation of single atoms suffers from inexorable metal aggregation which is harmful to electrocatalytic activity. Here, ionic covalent organic frameworks (iCOFs) are employed as the sacrificial precursor to mitigate the metal aggregation and subsequent formation of bulky particles. Molecular dynamics simulation shows that iCOFs can trap and confine more Co ions as compared to neutral COFs, resulting in the formation of a catalyst composed of Co single atoms and uniformly distributed Co nanoparticles (CoSA &CoNP-10 ). However, the neutral COFs derive a catalyst composed of Co atomic clusters and large Co nanoparticles (CoAC &CoNP-25 ). The CoSA &CoNP-10 catalyst exhibits higher oxygen bifunctional electrocatalytic activities than CoAC &CoNP-25 , coinciding with the density functional theory results. Taking the CoSA &CoNP-10 as the air cathode in Zn-air batteries (ZABs), the aqueous ZAB presents a high power density of 181 mW cm-2 , a specific capacity of 811 mAh g-1 as well as a long cycle life of 407 h at a current density of 10 mA cm-2 , while the quasi-solid state ZAB displays a power density of 179 mW cm-2 and the cycle life of 30 h.
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Affiliation(s)
- Jiaming Guo
- Guangxi Key Laboratory of Nuclear Physics and Technology, Department of Physics, Guangxi Normal University, Guilin, 541004, China
| | - Wenqiong Li
- Guangxi Key Laboratory of Nuclear Physics and Technology, Department of Physics, Guangxi Normal University, Guilin, 541004, China
| | - Yuncun Xu
- Guangxi Key Laboratory of Nuclear Physics and Technology, Department of Physics, Guangxi Normal University, Guilin, 541004, China
| | - Yanqi Mao
- Guangxi Key Laboratory of Nuclear Physics and Technology, Department of Physics, Guangxi Normal University, Guilin, 541004, China
| | - Zhiwei Mei
- Guangxi Key Laboratory of Nuclear Physics and Technology, Department of Physics, Guangxi Normal University, Guilin, 541004, China
| | - Haihan Li
- Guangxi Key Laboratory of Nuclear Physics and Technology, Department of Physics, Guangxi Normal University, Guilin, 541004, China
| | - Yun He
- Guangxi Key Laboratory of Nuclear Physics and Technology, Department of Physics, Guangxi Normal University, Guilin, 541004, China
| | - Xingyuan San
- Hebei Key Laboratory of Optic-electronic Information and Materials, The College of Physics Science and Technology, Hebei University, Baoding, 071002, China
| | - Kui Xu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing, 211816, China
| | - Xiaoguang Liang
- Guangxi Key Laboratory of Nuclear Physics and Technology, Department of Physics, Guangxi Normal University, Guilin, 541004, China
- Guangxi Key Laboratory of Low Carbon Energy Materials, Guangxi Normal University, Guilin, 541004, China
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5
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Zhang L, Guo Z, Gu X, Chen Y, San X, Xiao J, Wu S. Highly scalable and flexible on-chip all-silicon mode filter using backward mode conversion gratings. Opt Express 2022; 30:43439-43452. [PMID: 36523041 DOI: 10.1364/oe.473705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 10/30/2022] [Indexed: 06/17/2023]
Abstract
Mode filters are fundamental elements in a mode-division multiplexing (MDM) system for reducing modal cross-talk or realizing modal routing. However, the previously reported silicon mode filters can only filter one specific mode at a time and multiple modes filtering usually needs a cascade of several filters, which is adverse to highly integrated MDM systems. Here, we propose a unique concept to realize compact, scalable and flexible mode filters based on backward mode conversion gratings elaborately embedded in a multimode waveguide. Our proposed method is highly scalable for realizing a higher-order-mode-pass or band-mode-pass filter of any order and capable of flexibly filtering one or multiple modes simultaneously. We have demonstrated the concept through the design of four filters for different order of mode(s) and one mode demultiplexer based on such a filter, and the measurement of two fabricated 11μm length filters (TE1-pass/TE2-pass) show that an excellent performance of insertion loss <1.0dB/1.5dB and extinction ratio >29dB/28.5dB is achieved over a bandwidth of 51.2nm/48.3nm, which are competitive with the state-of-the-art.
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6
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San X, Gong M, Wang J, Ma X, dos Reis R, Smeets PJM, Dravid VP, Hu X. Uncovering the crystal defects within aragonite CaCO 3. Proc Natl Acad Sci U S A 2022; 119:e2122218119. [PMID: 35357967 PMCID: PMC9169084 DOI: 10.1073/pnas.2122218119] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 02/27/2022] [Indexed: 11/23/2022] Open
Abstract
Knowledge of deformation mechanisms in aragonite, one of the three crystalline polymorphs of CaCO3, is essential to understand the overall excellent mechanical performance of nacres. Dislocation slip and deformation twinning were claimed previously as plasticity carriers in aragonite, but crystallographic features of dislocations and twins have been poorly understood. Here, utilizing various transmission electron microscopy techniques, we reveal the atomic structures of twins, partial dislocations, and associated stacking faults. Combining a topological model and density functional theory calculations, we identify complete twin elements, characters of twinning disconnection, and the corresponding twin shear angle (∼8.8°) and rationalize unique partial dislocations as well. Additionally, we reveal an unreported potential energy dissipation mode within aragonite, namely, the formation of nanograins via the pile-up of partial dislocations. Based on the microstructural comparisons of biogenic and abiotic aragonite, we find that the crystallographic features of twins are the same. However, the twin density is much lower in abiotic aragonite due to the vastly different crystallization conditions, which in turn are likely due to the absence of organics, high temperature and pressure differences, the variation in inorganic impurities, or a combination thereof. Our findings enrich the knowledge of intrinsic crystal defects that accommodate plastic deformation in aragonite and provide insights into designing bioengineering materials with better strength and toughness.
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Affiliation(s)
- Xingyuan San
- Hebei Key Laboratory of Optic-electronic Information and Materials, The College of Physics Science and Technology, Hebei University, Baoding 071002, China
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
| | - Mingyu Gong
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jian Wang
- Department of Mechanical and Materials Engineering, University of Nebraska–Lincoln, Lincoln, NE 68583
| | - Xiuliang Ma
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
| | - Roberto dos Reis
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
- The Northwestern University Atomic and Nanoscale Characterization Experimental Center, Northwestern University, Evanston, IL 60208
| | - Paul J. M. Smeets
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
- The Northwestern University Atomic and Nanoscale Characterization Experimental Center, Northwestern University, Evanston, IL 60208
| | - Vinayak P. Dravid
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
- The Northwestern University Atomic and Nanoscale Characterization Experimental Center, Northwestern University, Evanston, IL 60208
| | - Xiaobing Hu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
- The Northwestern University Atomic and Nanoscale Characterization Experimental Center, Northwestern University, Evanston, IL 60208
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Kang X, Yuan D, Yi Z, Yu C, Yuan X, Liang B, San X, Gao L, Wang S, Li Y. Bismuth single atom supported CeO 2 nanosheets for oxidation resistant photothermal reverse water gas shift reaction. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00771a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bi single atoms supported on CeO2 nanosheets combined with a Ti2O3 based photothermal device showed oxidation resistance and outperforming weak solar driven RWGS with a CO production rate of 31.00 mmol g−1 h−1 under 3 sun units of irradiation.
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Affiliation(s)
- Xiaoxiao Kang
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Dachao Yuan
- College of Mechanical and Electrical Engineering, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Zhiqi Yi
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Chenyang Yu
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Xiaoxian Yuan
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Baolai Liang
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Xingyuan San
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Linjie Gao
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Shufang Wang
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
| | - Yaguang Li
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China
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Bai X, Yuan D, Li Y, Song H, Lu Y, San X, Lu J, Fu G, Wang S, Ye J. Ambient sunlight-driven photothermal methanol dehydrogenation for syngas production with 32.9 % solar-to-hydrogen conversion efficiency. iScience 2021; 24:102056. [PMID: 33537660 PMCID: PMC7841357 DOI: 10.1016/j.isci.2021.102056] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/04/2021] [Accepted: 01/07/2021] [Indexed: 12/25/2022] Open
Abstract
Methanol dehydrogenation is an efficient way to produce syngas with high quality. The current efficiency of sunlight-driven methanol dehydrogenation is poor, which is limited by the lack of excellent catalysts and effective methods to convert sunlight into chemicals. Here, we show that atomically substitutional Pt-doped in CeO2 nanosheets (Pts-CeO2) exhibit excellent methanol dehydrogenation activity with 500-hr level catalytic stability, 11 times higher than that of Pt nanoparticles/CeO2. Further, we introduce a photothermal conversion device to heat Pts-CeO2 up to 299°C under 1 sun irradiation owning to efficient full sunlight absorption and low heat dissipation, thus achieving an extraordinarily high methanol dehydrogenation performance with a 481.1 mmol g−1 h−1 of H2 production rate and a high solar-to-hydrogen (STH) efficiency of 32.9%. Our method represents another progress for ambient sunlight-driven stable and active methanol dehydrogenation technology. Atomically substitutional Pt-doped CeO2 is active and robust for CH3OH dehydrogenation The photothermal conversion device can heat Pts-CeO2 to 299°C under 1 sun irradiation The joint system achieves a one sun irradiated H2 production rate of 481.1 mmol g−1 h−1 This system delivers a high solar-to-H2 efficiency of 32.9% under one sun irradiation
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Affiliation(s)
- Xianhua Bai
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding 071002, P. R. China
| | - Dachao Yuan
- College of Mechanical and Electrical Engineering, Hebei Agricultural University, Baoding 071001, P. R. China
| | - Yaguang Li
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding 071002, P. R. China
| | - Hui Song
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yangfan Lu
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, P. R. China
| | - Xingyuan San
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding 071002, P. R. China
| | - Jianmin Lu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China
| | - Guangsheng Fu
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding 071002, P. R. China
| | - Shufang Wang
- Hebei Key Lab of Optic-electronic Information and Materials, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding 071002, P. R. China
| | - Jinhua Ye
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.,TJU-NIMS International Collaboration Laboratory, School of Material Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
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9
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San X, Zhang B, Wang J, Wu B, Ma X. In situ tracking the reversible spinel-rocksalt structural transformation between Mn 3O 4 and MnO. Micron 2016; 92:13-18. [PMID: 27816743 DOI: 10.1016/j.micron.2016.09.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 09/18/2016] [Accepted: 09/18/2016] [Indexed: 10/20/2022]
Abstract
Electron beam irradiation is well known to induce damage in materials. The structural transformation involved in the damage is usually believed to be an irreversible solid state chemical reaction. Here we use in situ transmission electron microscopy (TEM) combined electron-energy loss spectroscopy (EELS) technique in an aberration-corrected TEM to track the structural transformation in spinel Mn3O4 induced by electron beam irradiation. It is clarified that spinel Mn3O4 is transformed to rocksalt structured MnO by irradiation and the reversed recovering transition from rocksalt MnO to spinel Mn3O4 can occur by aging in the gentle electron beam circumstance. The mechanisms including the role of O desorption/adsorption and the displacement of Mn and O involved in the reversible transformation processes are discussed. The work presents an implication that electron beam can modify the structure at atomic dimension yielding diverse assemblies of surfaces, interfaces and colorful properties.
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Affiliation(s)
- Xingyuan San
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua Road 72, 110016 Shenyang, China
| | - Bo Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua Road 72, 110016 Shenyang, China.
| | - Jing Wang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua Road 72, 110016 Shenyang, China
| | - Bo Wu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua Road 72, 110016 Shenyang, China
| | - Xiuliang Ma
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua Road 72, 110016 Shenyang, China
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Shan L, Wang G, Li D, San X, Liu L, Dong L, Wu Z. Band alignment and enhanced photocatalytic activation of α/β-Bi2O3 heterojunctions via in situ phase transformation. Dalton Trans 2015; 44:7835-43. [DOI: 10.1039/c5dt00621j] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The α/β-Bi2O3 heterojunction prepared by an in situ phase transformation technique shows effective band alignment and high photocatalytic activity.
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Affiliation(s)
- Lianwei Shan
- College of Material Science and Engineering
- Harbin University of Science and Technology
- Key Laboratory of Materials Research and Application of Heilongjiang Province
- 150040 Harbin
- China
| | - Guilin Wang
- College of Material Science and Engineering
- Harbin University of Science and Technology
- Key Laboratory of Materials Research and Application of Heilongjiang Province
- 150040 Harbin
- China
| | - Dan Li
- College of Material Science and Engineering
- Harbin University of Science and Technology
- Key Laboratory of Materials Research and Application of Heilongjiang Province
- 150040 Harbin
- China
| | - Xingyuan San
- Shenyang National Laboratory for Materials Science
- Institute of Metal Research
- Chinese Academy of Sciences
- 110016 Shenyang
- China
| | - Lizhu Liu
- College of Material Science and Engineering
- Harbin University of Science and Technology
- Key Laboratory of Materials Research and Application of Heilongjiang Province
- 150040 Harbin
- China
| | - Limin Dong
- College of Material Science and Engineering
- Harbin University of Science and Technology
- Key Laboratory of Materials Research and Application of Heilongjiang Province
- 150040 Harbin
- China
| | - Ze Wu
- College of Material Science and Engineering
- Harbin University of Science and Technology
- Key Laboratory of Materials Research and Application of Heilongjiang Province
- 150040 Harbin
- China
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