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Liu Y, Liu P, Men YL, Li Y, Peng C, Xi S, Pan YX. Incorporating MoO 3 Patches into a Ni Oxyhydroxide Nanosheet Boosts the Electrocatalytic Oxygen Evolution Reaction. ACS APPLIED MATERIALS & INTERFACES 2021; 13:26064-26073. [PMID: 34038083 DOI: 10.1021/acsami.1c05660] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The electrocatalytic oxygen evolution reaction from H2O (OER) is essential in a number of areas like electrocatalytic hydrogen production from H2O. A Ni oxyhydroxide nanosheet (NiNS) is among the most widely studied OER catalysts but still suffers from low activity, sluggish kinetics, and poor stability. Herein, we incorporate MoO3 patches into NiNS to form a nanosheet with an intimate Ni-Mo interface (NiMoNS) for the OER. The overpotential at 10 mA cm-2 and Tafel slope on NiMoNS (260 mV, 54.7 mV dec-1) are lower than those on NiNS (296 mV, 89.3 mV dec-1), implying that higher activity and faster kinetics are achieved on NiMoNS. There is no change in electrocatalytic efficiency of NiMoNS after 18 h of OER, but the electrocatalytic efficiency of NiNS decreases by 56% after only 8 h of OER. Thus, NiMoNS has better stability. The intimate Ni-Mo interface promotes two-dimensional lateral growth of NiMoNS to form a surface area 1.5 times larger than that of NiNS, and facilitates electron transfer from Ni to Mo. This makes the Ni3+/Ni2+ ratio on the NiMoNS surface (1.32) higher than that on the NiNS surface (0.68). Moreover, the Ni3+/Ni2+ ratio on NiMoNS surface increases to 1.81 after 18 h of OER but the Ni3+/Ni2+ ratio on the NiNS surface decreases to 0.51 after 8 h of OER. Therefore, the NiMoNS surface has more abundant and stable Ni3+ sites which are catalytically active toward OER. This could be the reason for the enhanced activity, kinetics, and stability of NiMoNS. The results are very valuable for fabricating more efficient catalysts for electrocatalysis.
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Affiliation(s)
- Yi Liu
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Peng Liu
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yu-Long Men
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yibao Li
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, Jiangxi, China
| | - Chong Peng
- Dalian Research Institute of Petroleum and Petrochemicals, SINOPEC, Dalian 116045, Liaoning, China
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences, A*STAR, 1 Pesek Road, Jurong Island, 627833 Singapore
| | - Yun-Xiang Pan
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Johnson ID, Nolis G, Yin L, Yoo HD, Parajuli P, Mukherjee A, Andrews JL, Lopez M, Klie RF, Banerjee S, Ingram BJ, Lapidus S, Cabana J, Darr JA. Enhanced charge storage of nanometric ζ-V 2O 5 in Mg electrolytes. NANOSCALE 2020; 12:22150-22160. [PMID: 33135020 DOI: 10.1039/d0nr05060a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
V2O5 is of interest as a Mg intercalation electrode material for Mg batteries, both in its thermodynamically stable layered polymorph (α-V2O5) and in its metastable tunnel structure (ζ-V2O5). However, such oxide cathodes typically display poor Mg insertion/removal kinetics, with large voltage hysteresis. Herein, we report the synthesis and evaluation of nanosized (ca. 100 nm) ζ-V2O5 in Mg-ion cells, which displays significantly enhanced electrochemical kinetics compared to microsized ζ-V2O5. This effect results in a significant boost in stable discharge capacity (130 mA h g-1) compared to bulk ζ-V2O5 (70 mA h g-1), with reduced voltage hysteresis (1.0 V compared to 1.4 V). This study reveals significant advancements in the use of ζ-V2O5 for Mg-based energy storage and yields a better understanding of the kinetic limiting factors for reversible magnesiation reactions into such phases.
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Affiliation(s)
- Ian D Johnson
- Department of Chemistry, University College London, London WC1H 0AJ, UK. and Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA and Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Gene Nolis
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA and Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA. and CICenergiGUNE, Parque Tecnológico de Álava, Albert Einstein 48, ED.CIC, 01510, Miñano, Spain
| | - Liang Yin
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA and X-ray Science Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Hyun Deog Yoo
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA and Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA. and Department of Chemistry and Chemical Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Prakash Parajuli
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA and Department of Physics, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Arijita Mukherjee
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA and Department of Physics, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Justin L Andrews
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Mario Lopez
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA and Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA.
| | - Robert F Klie
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA and Department of Physics, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Sarbajit Banerjee
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Brian J Ingram
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA and Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Saul Lapidus
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA and X-ray Science Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Jordi Cabana
- Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, IL 60439, USA and Department of Chemistry, University of Illinois at Chicago, Chicago, IL 60607, USA.
| | - Jawwad A Darr
- Department of Chemistry, University College London, London WC1H 0AJ, UK.
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Synthesis of Micro- and Nanoparticles in Sub- and Supercritical Water: From the Laboratory to Larger Scales. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10165508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The use of micro- and nanoparticles is gaining more and more importance because of their wide range of uses and benefits based on their unique mechanical, physical, electrical, optical, electronic, and magnetic properties. In recent decades, supercritical fluid technologies have strongly emerged as an effective alternative to other numerous particle generation processes, mainly thanks to the peculiar properties exhibited by supercritical fluids. Carbon dioxide and water have so far been two of the most commonly used fluids for particle generation, the former being the fluid par excellence in this field, mainly, because it offers the possibility of precipitating thermolabile particles. Nevertheless, the use of high-pressure and -temperature water opens an innovative and very interesting field of study, especially with regards to the precipitation of particles that could hardly be precipitated when CO2 is used, such as metal particles with a considerable value in the market. This review describes an innovative method to obtain micro- and nanoparticles: hydrothermal synthesis by means of near and supercritical water. It also describes the differences between this method and other conventional procedures, the most currently active research centers, the types of particles synthesized, the techniques to evaluate the products obtained, the main operating parameters, the types of reactors, and amongst them, the most significant and the most frequently used, the scaling-up studies under progress, and the milestones to be reached in the coming years.
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