Porous Nickel–Iron Oxide as a Highly Efficient Electrocatalyst for Oxygen Evolution Reaction

Qi, Jing; Zhang, Wei; Xiang, Ruijuan; Liu, Kaiqiang; Wang, Hong‐Yan; Chen, Mingxing; Han, Yongzhen; Cao, Rui

doi:10.1002/advs.201500199

Cited by 250 publications

(174 citation statements)

References 58 publications

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“…We supposed that the porous structure in Fe/Ni-BTC film generated from BTC is favorable for the OER catalysis, and this result excludes the influence of the small amount of amorphous metal hydroxides or metal oxides that may exist in the Fe/Ni-BTC film. Compared with two similar catalysts that we reported previously, i.e., bulk Ni− Fe oxides and porous Ni−Fe oxides, 10 the Fe/Ni-BTC@NF clearly outperforms the porous Ni−Fe oxide catalyst owing to not only the intrinsic porosity of MOF film but also the periodic arrangement and the homogeneous distribution of metal centers in the MOF film. Moreover, the NF affords a highly conductive macroporous scaffold with high surface area.…”

Section: ■ Results and Discussionmentioning

confidence: 66%

“…More importantly, the building block design, rich choice of mixed metal ions, and electrochemical deposition fabrication strategy may pave the way for developing novel heterogeneous OER catalysts with molecular design and tuning abilities showing exceptional electrocatalytic performance for potential large-scale applications.■ ASSOCIATED CONTENT * S Supporting InformationThe Supporting Information is available free of charge on the ACS Publications website at DOI:10.1021/acsami.6b05375. ECD process, N 2 adsorption/desorption isotherms, LSV curves of MOFs samples with different Fe/Ni ratios, cyclic voltammograms, analysis of ECSA, table for OER activities of some benchmark electrocatalysts (PDF) Video S1, controlled potential electrolysis (AVI) *E-mail: bowang@bit.edu.cn.…”

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confidence: 99%

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Fe/Ni Metal–Organic Frameworks and Their Binder-Free Thin Films for Efficient Oxygen Evolution with Low Overpotential

Wang

Cao

et al. 2016

ACS Appl. Mater. Interfaces

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Multivariate metal-organic frameworks with active Fe/Ni building blocks that are spatially arranged in an open structure are synthesized and explored for oxygen evolution reaction. The heterogeneity and porosity of this system prove to show synergy effect and give low onset overpotential at 170 mV. These MOFs are further fabricated into thin films over nickel foam by controlled electrochemical deposition to improve the surface conductivity and the overall stability. The Fe/Ni metal-organic framework film exhibits outstanding electrocatalytic activity with low overpotential of 270 mV at 10 mA cm(-2), small Tafel slope, high Faradaic efficiency, high turnover frequency, and great stability.

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Section: ■ Results and Discussionmentioning

confidence: 66%

mentioning

confidence: 99%

Fe/Ni Metal–Organic Frameworks and Their Binder-Free Thin Films for Efficient Oxygen Evolution with Low Overpotential

Wang

Cao

et al. 2016

ACS Appl. Mater. Interfaces

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“…More likely and more preferably, the metal-hydroxyl adduct can give out an electron to the electrode and release a proton to the buffer electrolyte or the proximate ligands to form a metal-oxo species with a high-valence metal center. [146][147][148][149][150][151][152][153][154][155][156] Typically, materials with mixed metal elements display much enhanced activity compared with their single metal counterparts. The nucleophilic attack on the metal-oxo site by a water molecule is a favored reaction to form the OO bond and to subsequently release the O 2 .…”

Section: Electrocatalytic Oxygen Evolutionmentioning

confidence: 99%

“…Thereafter, there are two typical pathways to generate an O 2 molecule based on the metal-oxo species. [7,148,157] Adv. Less likely, two adjacent metal-oxo species may interact together to form the OO bond provided with the proper distance between the two oxygen atoms.…”

Section: Electrocatalytic Oxygen Evolutionmentioning

confidence: 99%

Solar‐to‐Hydrogen Energy Conversion Based on Water Splitting

Zhang

Cao

2017

Advanced Energy Materials

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Artificial photosynthesis provides a blueprint to harvest solar energy to sustain the future energy demands. Solar‐driven water splitting, converting solar energy into hydrogen energy, is the prototype of photosynthesis. Various systems have been designed and evaluated to understand the reaction pathways and/or to meet the requirements of potential applications. In solar‐to‐hydrogen conversion, electrocatalytic hydrogen and oxygen evolution reactions are key research areas that are meaningful both theoretically and practically. To utilize hydrogen energy, fuel cell technology has been extensively investigated because of its high efficiency in releasing chemical energy. In this review, general concepts of the photosynthesis in green plants are discussed, different strategies for the light‐driven water splitting proposed in laboratories are introduced, the progress of electrocatalytic hydrogen and oxygen evolution reactions are reviewed, and finally, the reactions in hydrogen fuel cells are briefly discussed. Overall, the mass and energy circulation in the solar‐hydrogen‐electricity circle are delineated. The authors conclude that attention from scientists and engineers of relevant research areas is still highly needed to eliminate the wide disparity between the aspirations and realities of artificial photosynthesis.

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“…Qi et al also reported the improved OER performance of Fe-doped NiO. [189] The Fe-doped NiO annealed up to 200 °C presented the highest catalytic efficiency with η = 487 mV at 62 mA cm −2 for Ni 85 Fe 15 .…”

Section: Rock-salt-type Metal Oxidesmentioning

confidence: 99%

Recent Progress on Multimetal Oxide Catalysts for the Oxygen Evolution Reaction

Kim

et al. 2018

Advanced Energy Materials

659

492

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fossil fuels are being widely researched for the development of a sustainable energy system. Among the various candidates for green energy resources, hydrogen energy has been at the center of attention. [1,2] Hydrogen is both inexhaustible and environmentally friendly, because it can be produced from earth-abundant reactants such as water and methane and because no CO 2 or other toxic products are emitted during its conversion into other energy form such as electricity, respectively. Moreover, hydrogen can exhibit significantly larger energy density compared with other energy sources such as gasoline and coal. The most widely used method of hydrogen production today is steam reforming because of its low cost in the process. [3] Nevertheless, the release of carbon monoxide or carbon dioxide as byproducts in the steam reforming process diminishes the environmental merits of hydrogen energy. Thus, as a possible cleaner alternative, an electrolysis method that involves producing hydrogen by electrochemically splitting water has been extensively investigated. Using one of the most abundant resources, water, the production of hydrogen from it yields only oxygen as a byproduct.In the water electrolysis, the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) occur simultaneously, as described by the following equationsIn order for the reaction to proceed, a voltage of 1.23 V is theoretically required between an anode and a cathode. However, an overpotential (represented by the symbol η) should be additionally applied to account for the potential loss resulting from kinetic limitations occurring during the electrochemical reaction. The use of electrocatalysts can lower the overpotential by kinetically facilitating the water-splitting reaction either in HER or OER. Due to the nature of four-electron involving OER, it is generally believed that the OER is much more sluggish than the HER; thus, the development of efficient OER Hydrogen is a promising alternative fuel for efficient energy production and storage, with water splitting considered one of the most clean, environmentally friendly, and sustainable approaches to generate hydrogen. However, to meet industrial demands with electrolysis-generated hydrogen, the development of a low-cost and efficient catalyst for the oxygen evolution reaction (OER) is critical, while conventional catalysts are mostly based on precious metals. Many studies have thus focused on exploring new efficient nonprecious-metal catalytic systems and improving the understandings on the OER mechanism, resulting in the design of catalysts with superior activity compared with that of conventional catalysts. In particular, the use of multimetal rather than single-metal catalysts is demonstrated to yield remarkable performance improvement, as the metal composition in these catalysts can be tailored to modify the intrinsic properties affecting the OER. Herein, recent progress and accomplishments of multimetal catalytic systems, including several important groups of catalysts: layered h...

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Porous Nickel–Iron Oxide as a Highly Efficient Electrocatalyst for Oxygen Evolution Reaction

Cited by 250 publications

References 58 publications

Fe/Ni Metal–Organic Frameworks and Their Binder-Free Thin Films for Efficient Oxygen Evolution with Low Overpotential

Fe/Ni Metal–Organic Frameworks and Their Binder-Free Thin Films for Efficient Oxygen Evolution with Low Overpotential

Solar‐to‐Hydrogen Energy Conversion Based on Water Splitting

Recent Progress on Multimetal Oxide Catalysts for the Oxygen Evolution Reaction

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