Hydrated Manganese(II) Phosphate (Mn3(PO4)2·3H2O) as a Water Oxidation Catalyst

Jin, Kyoungsuk; Park, Jimin; Lee, Joohee; Yang, Ki Dong; Pradhan, Gajendra Kumar; Sim, Uk; Jeong, Dae Hong; Jang, Hae Lin; Park, Sangbaek; Kim, Dong-Hun; Sung, Nark Eon; Kim, Sun Hee; Han, Seungwu; Nam, Ki Tae

doi:10.1021/ja5026529

Cited by 324 publications

(264 citation statements)

References 44 publications

(88 reference statements)

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“…[8][9][10][11][12][13] Birnessite is an aturally occurring manganese oxide mineral that is ubiquitous in soils,n odules,a nd stream deposits. [8][9][10][11][12][13] Birnessite is an aturally occurring manganese oxide mineral that is ubiquitous in soils,n odules,a nd stream deposits.…”

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confidence: 99%

Nickel Confined in the Interlayer Region of Birnessite: an Active Electrocatalyst for Water Oxidation

et al. 2016

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We report a synthetic method to enhance the electrocatalytic activity of birnessite for the oxygen evolution reaction (OER) by intercalating Ni 2+ ions into the interlayer region. Electrocatalytic studies showed that nickel (7.7 atomic %)-intercalated birnessite exhibits an overpotential (h) of 400 mV for OER at an anodic current of 10 mA cm À2 . This h is significantly lower than the h values for birnessite (h % 700 mV) and the active OER catalyst b-Ni(OH) 2 (h % 550 mV). Molecular dynamics simulations suggest that a competition among the interactions between the nickel cation, water, and birnessite promote redox chemistry in the spatially confined interlayer region.Converting sunlight to useful forms of energy, such as electrical and chemical energy, has the potential to help eliminate the fossil fuel dependence of mankind. [1][2][3][4][5][6] From this standpoint, designing cheap, efficient, and robust catalysts that can facilitate the splitting of water to oxygen and hydrogen is a worthwhile goal that will potentially pave the path for efficient conversion of solar energy to chemical energy. The splitting of water [Eq. (1)] is thermodynamically uphill and a kinetically hindered reaction, which has a high energetic penalty without a catalyst. [7] H 2 O ðlÞ !Inspired by the ability of manganese-bearing photosystem II (PS-II) to split water, there have been numerous studies that have utilized manganese-containing compounds as homogeneous and/or heterogeneous catalysts for the oxygen evolution reaction (OER).

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confidence: 99%

Nickel Confined in the Interlayer Region of Birnessite: an Active Electrocatalyst for Water Oxidation

et al. 2016

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“…Additionally, the infrared (IR) spectrum of the MnDNFs (Supplementary Figure S50) was similar to that of previously published Mn 2 P 2 O 7 .2H 2 O (41). We then compared the IR spectra with Mn 2+ and Co 2+ phosphate and pyrophosphate salts, which were prepared by mixing corresponding metal dichloride with buffered pyrophosphate or phosphate based on a literature procedure for the synthesis of hydrated manganese(II) phosphate (Mn 3 (PO 4 ) 2 ·3H 2 O) (22). In all cases, the IR spectra matched with the pyrophosphate salts suggesting that the DNFs are composed of a derivative of M 2+ with P 2 O 7 4− , most likely M 2 P 2 O 7 rather than phosphate salts (Supplementary Figures S50–S58).…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of manganese, cobalt and zinc DNA nanoflowers with tuneable morphology, DNA content and size

Baker

Chen

Brown

et al. 2018

Nucleic Acids Research

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Recently reported DNA nanoflowers are an interesting class of organic-inorganic hybrid materials which are prepared using DNA polymerases. DNA nanoflowers combine the high surface area and scaffolding of inorganic Mg2P2O7 nanocrystals with the targeting properties of DNA, whilst adding enzymatic stability and enhanced cellular uptake. We have investigated conditions for chemically modifying the inorganic core of these nanoflowers through substitution of Mg2+ with Mn2+, Co2+ or Zn2+ and have characterized the resulting particles. These have a range of novel nanoarchitectures, retain the enzymatic stability of their magnesium counterparts and the Co2+ and Mn2+ DNA nanoflowers have added magnetic properties. We investigate conditions to control different morphologies, DNA content, hybridization properties, and size. Additionally, we show that DNA nanoflower production is not limited to Ф29 DNA polymerase and that the choice of polymerase can influence the DNA length within the constructs. We anticipate that the added control of structure, size and chemistry will enhance future applications.

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“…[27][28][29][30] In nature, the water oxidation catalyst of photosynthesis was composed of earth-abundant elements such as Mn and Ca in the form of cubical CaMn 4 O 5 clusters, which functioned under neutral conditions with very low overpotential value. 31 The unique capability of natural system has inspired the design of manganese phosphate as water oxidation catalyst with superior catalytic performance at neutral pH.…”

Section: 19-26mentioning

confidence: 99%

Synthesis of manganese phosphate hybrid nanoflowers by collagen-templated biomineralization

Munyemana

Ding

et al. 2018

RSC Adv.

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Construction of protein-inorganic hybrid materials with hierarchical nanostructures is critical for the creation of advanced multi-functional materials. We herein for the first time report the synthesis of protein-manganese phosphate hybrid nanomaterials by environmentally amiable biomineralization approach. We have demonstrated that collagen provides an excellent biotemplate to modulate the morphology of the hybrid materials, leading to exquisite nanoflowers with branched petals. In this timedependent biomineralization process, collagen played an essential role in the production of proteinmanganese phosphate hybrid materials by inducing the nucleation of manganese phosphates to form a scaffold as well as serving as a glue to hold the petals together. The as-prepared CL-Mn 3 (PO 4 ) 2 nanoflowers exhibited good catalytic activity towards water oxidation. The unique (Gly-X-Y) n amino acid sequences and triple helix structure may provide extraordinary capability for collagen to create hybrid nanomaterials via collagen-templated biomineralization. The single-size and high purity may endow recombinant collagen as a powerful strategy to establish superior biotemplates. This facile and green approach to produce collagen-manganese phosphate hybrid nanoflowers greatly advances our capability to construct manganese phosphates-based functional materials.

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Hydrated Manganese(II) Phosphate (Mn₃(PO₄)₂·3H₂O) as a Water Oxidation Catalyst

Cited by 324 publications

References 44 publications

Nickel Confined in the Interlayer Region of Birnessite: an Active Electrocatalyst for Water Oxidation

Nickel Confined in the Interlayer Region of Birnessite: an Active Electrocatalyst for Water Oxidation

Preparation and characterization of manganese, cobalt and zinc DNA nanoflowers with tuneable morphology, DNA content and size

Synthesis of manganese phosphate hybrid nanoflowers by collagen-templated biomineralization

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