Journal ArticleDOI
Stable Iron Hydroxide Nanosheets@Cobalt-Metal-Organic-Framework Heterostructure for Efficient Electrocatalytic Oxygen Evolution.
TLDR
A MOF surface-reaction strategy to synthesize pyrolysis-free MOF-based heterostructure with excellent performance toward OER, and thereby provides a new avenue for the fabrication of other energy conversion and storage materials.Abstract:
Most studies are devoted to the use of metal-organic frameworks (MOFs) as templates to construct desirable electrocatalysts in situ by high-temperature pyrolysis. The emergence of heterostructures invokes new opportunities to use the full potential of pristine MOFs as efficient catalysts in the oxygen evolution reaction (OER). Here, a MOF surface-reaction strategy is developed to synthesize MOF-based heterostructures without pyrolysis. Uniform Fe(OH)3 nanosheets are grown controllably on the Co-MOF-74 surface by a fast "phenol-Fe" reaction that takes advantage of the hydroxyl sites in Co-MOF-74. The resulting Fe(OH)3 @Co-MOF-74 heterostructure delivers an excellent performance in the OER with a low overpotential of 292 mV at 10 mA cm-2 . Notably, the introduction of Fe can improve the intrinsic activity of the original Co atom significantly. The turnover frequency in Fe(OH)3 @Co-MOF-74 (1.209 s-1 ) is more than 25 times higher than that in Co-MOF-74 (0.048 s-1 ). This work presents a fresh concept for the fundamental design of advanced pure-MOF-based heterostructures and, thereby, provides a new avenue for the fabrication of other energy-conversion and -storage materials.read more
Citations
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Journal ArticleDOI
Transition metal-based bimetallic MOFs and MOF-derived catalysts for electrochemical oxygen evolution reaction
TL;DR: The transition metal-based bimetallic MOFs (TMB MOFs) with two different metal ions possess specific synergistic effects, which could exhibit OER performance and stability superior to those of the corresponding monometallic MOF for water oxidation.
Journal ArticleDOI
Embedding Ultrafine Metal Oxide Nanoparticles in Monolayered Metal-Organic Framework Nanosheets Enables Efficient Electrocatalytic Oxygen Evolution.
Wang Zhang,Wang Zhang,Yu Wang,Han Zheng,Rui Li,Yu-Jia Tang,Boyuan Li,Chao Zhu,Liming You,Min-Rui Gao,Zheng Liu,Shu-Hong Yu,Kun Zhou +12 more
TL;DR: Electrochemical studies confirm that the ultrathin heterogeneous nanosheets deposited on carbon cloth can achieve an excellent electrocatalytic OER performance with a low overpotential of 232 mV at a current density of 10 mA cm-2 with good stability.
Journal ArticleDOI
Recent progress on bimetallic NiCo and CoFe based electrocatalysts for alkaline oxygen evolution reaction: A review
Journal ArticleDOI
Recent progress on bimetallic NiCo and CoFe based electrocatalysts for alkaline oxygen evolution reaction: A review
TL;DR: In this paper , a review of the recent progress and efforts made in the design and development of two selected earth-abundant bimetallic electrocatalysts (NiCo and CoFe) for alkaline OER is presented.
Journal ArticleDOI
Synergizing Hydrogen Spillover and Deprotonation by the Internal Polarization Field in a MoS2/NiPS3 Vertical Heterostructure for Boosted Water Electrolysis
Yaoda Liu,Ya Chen,Yahui Tian,Thangavel Sakthivel,Hang Liu,Shengwu Guo,Haibo Zeng,Zhengfei Dai +7 more
Abstract: Hydrogen spillover (HSo) has emerged to upgrade the hydrogen evolution reaction (HER) activity of Pt‐support electrocatalysts, but it is not applicable to the deprotonated oxygen evolution reaction (OER). Non‐precious catalysts that can perform well in both HSo and deprotonation (DeP) are extremely desirable for a sustainable hydrogen economy. Herein, an affordable MoS2/NiPS3 vertical heterostructure catalyst is presented to synergize HSo and DeP for efficient water electrolysis. The internal polarization field (IPF) is clarified as the driving force of HSo in HER electrocatalysis. The HSo from the MoS2 edge to NiPS3 can activate the NiPS3 basal plane to boost the HER activity of the MoS2/NiPS3 heterostructure (112 mV vs reversible hydrogen electrode (RHE) at 10 mA cm–2), while for OER, the IPF in the heterostructure can facilitate the hydroxyl diffusion and render MoS2‐to‐NiPS3/P‐to‐S dual‐pathways for DeP. As a result, the stacking of OER‐inactive MoS2 on the NiPS3 surface still brings intriguing OER enhancements. With them serving as electrode couples, the overall water splitting is attested stably with a cell voltage of 1.64 V at 10 mA cm−2. This research puts forward the IPF as the criterion in the rational design of HSo/DeP‐unified non‐precious catalysts for efficient water electrolysis.
References
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Journal ArticleDOI
Ultrathin metal–organic framework nanosheets for electrocatalytic oxygen evolution
Shenlong Zhao,Shenlong Zhao,Yun Wang,Juncai Dong,Chun-Ting He,Huajie Yin,Huajie Yin,Pengfei An,Kun Zhao,Xiaofei Zhang,Chao Gao,Lijuan Zhang,Lijuan Zhang,Jiawei Lv,Jinxin Wang,Jinxin Wang,Jianqi Zhang,Abdul Muqsit Khattak,Niaz Ali Khan,Zhixiang Wei,Jing Zhang,Shaoqin Liu,Huijun Zhao,Zhiyong Tang +23 more
TL;DR: In this paper, the authors reported ultrathin metal-organic frameworks (MOFs) as promising electrocatalysts for the oxygen evolution reaction (OER) in alkaline conditions.
Journal ArticleDOI
Homogeneously dispersed, multimetal oxygen-evolving catalysts
Bo Zhang,Bo Zhang,Xueli Zheng,Xueli Zheng,Oleksandr Voznyy,Riccardo Comin,Michal Bajdich,Michal Bajdich,Max García-Melchor,Max García-Melchor,Lili Han,Lili Han,Jixian Xu,Min Liu,Lirong Zheng,F. Pelayo García de Arquer,Cao-Thang Dinh,Fengjia Fan,Mingjian Yuan,Emre Yassitepe,Ning Chen,Tom Regier,Peng Fei Liu,Yu Hang Li,Phil De Luna,Alyf Janmohamed,Huolin L. Xin,Hua Gui Yang,Aleksandra Vojvodic,Aleksandra Vojvodic,Edward H. Sargent +30 more
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Journal ArticleDOI
Ultrathin metal-organic framework array for efficient electrocatalytic water splitting.
TL;DR: This work fabricates a nickel-iron-based metal-organic framework array, which demonstrates superior electrocatalytic performance towards oxygen evolution reaction with a small overpotential, and robust operation for 20,000s with no detectable activity decay, and demonstrates the promise of these electrodes for other important catalytic reactions including hydrogen evolution reaction and overall water splitting.
Journal ArticleDOI
Metal-Organic Frameworks for Energy Applications
TL;DR: In this paper, the authors present the recent progress in the field of energy storage and conversion using metal-organic frameworks and their composites and derivatives by focusing on the correlation of structure, composition, and function.
Journal ArticleDOI
Metal−Organic Frameworks for Electrocatalytic Reduction of Carbon Dioxide
Nikolay Kornienko,Yingbo Zhao,Christopher S. Kley,Chenhui Zhu,Dohyung Kim,Song Lin,Christopher J. Chang,Omar M. Yaghi,Peidong Yang +8 more
TL;DR: Th thin films of nanosized metal-organic frameworks (MOFs) are introduced as atomically defined and nanoscopic materials that function as catalysts for the efficient and selective reduction of carbon dioxide to carbon monoxide in aqueous electrolytes.
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