A nickel (II) PY5 complex as an electrocatalyst for water oxidation

Wang, Lei; Duan, Lele; Ambre, Ram; Daniel, Quentin; Chen, Hong; Sun, Junliang; Das, Biswanath; Thapper, Anders; Uhlig, Jens; Dinér, Peter; Sun, Licheng

doi:10.1016/j.jcat.2015.12.003

Cited by 130 publications

(131 citation statements)

References 57 publications

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“…Notably, 1 takes advantage of the phenolate ligand as the second redox-active site besides the metal center. Therefore, the formation of a putative high-valent nickel-oxo species as the reactive intermediate 15 could be avoided while a reasonable turnover rate is retained. On the other hand, 1 has limited stability under catalytic conditions, as revealed in Figure S7.…”

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confidence: 99%

Catalytic Water Oxidation by a Bio-inspired Nickel Complex with a Redox-Active Ligand

Wang

Bruner

2017

Inorg. Chem.

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The oxidation of water to dioxygen is important in natural photosynthesis. One of nature’s strategies for managing such multi-electron transfer reactions is to employ redox active metal-organic cofactor arrays. One prototype example is the copper-tyrosinate active site found in galactose oxidase. In this work, we have implemented such a strategy to develop a bio-inspired nickel-phenolate complex capable of catalyzing the oxidation of water to O2 electrochemically at neutral pH with a modest overpotential. The employment of the redox-active ligand turned out to be a useful strategy to avoid the formation of high-valent nickel intermediates while a reasonable turnover rate (0.15 s−1) is retained.

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confidence: 99%

Catalytic Water Oxidation by a Bio-inspired Nickel Complex with a Redox-Active Ligand

Wang

Bruner

2017

Inorg. Chem.

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“…The first oxidation peak can be attributedt ot he redox pair of Ni III /Ni II ,a nd the second oxidation peak can be attributed to the redoxp air of Ni IV /Ni III . The mechanism is summarized in Equations (13)- (16). [164] Considering the isomers of Ni intermediates, the mechanism was studied further through DFT calculations.…”

Section: Nickel-basedw Ocsmentioning

confidence: 99%

“…[9] In addition to multicore first-row TM complexes, some multinuclear ruthenium-based catalysts have the ability to contributet oO À Ob ond formation with al ow energy barrier, such as some binuclear ruthenium complexes. [16] On Water splitting, in which water molecules can be transformed into hydrogen and oxygen, is an appealing energy conversion and transformation strategy to address the environmental and energy crisis. Research into the energy barrier of OÀOb ond formation on the catalytic site with ah igh oxidation stated uringt he OER has been examined by many researcherst hrough theoretical computationsa nd in situ experimental measurements.…”

Section: Introductionmentioning

confidence: 99%

Mono‐/Multinuclear Water Oxidation Catalysts

Zhang

Guan

2019

ChemSusChem

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Water splitting, in which water molecules can be transformed into hydrogen and oxygen, is an appealing energy conversion and transformation strategy to address the environmental and energy crisis. The oxygen evolution reaction (OER) is dynamically slow, which limits energy conversion efficiency during the water‐splitting process and requires high‐efficiency water oxidation catalysts (WOCs) to overcome the OER energy barrier. It is generally accepted that multinuclear WOCs possess superior OER performances, as demonstrated by the CaMn4O5 cluster in photosystem II (PSII), which can catalyze the OER efficiently with a very low overpotential. Inspired by the CaMn4O5 cluster in PSII, some multinuclear WOCs were synthesized that could catalyze water oxidation. In addition, some mononuclear molecular WOCs also show high water oxidation activity. However, it cannot be excluded that the high activity arises from the formation of dimeric species. Recently, some mononuclear heterogeneous WOCs showed a high water oxidation activity, which testified that mononuclear active sites with suitable coordination surroundings could also catalyze water oxidation efficiently. This Review focuses on recent progress in the development of mono‐/multinuclear homo‐ and heterogeneous catalysts for water oxidation. The active sites and possible catalytic mechanisms for water oxidation on the mono‐/multinuclear WOCs are provided.

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“…Nickelsulphate is water soluble, colored, complex forming (Wang et al 2016;Rosetto et al 2015) and economically cheaper material with catalytic activity (Liu et al 2009;Franquin et al 1999). Catalytic hydrogenation of imines using Ni catalyst was reported by Ayyala et al (2004).…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and catalytic activity of nanosized Ni complexed aminoclay

Ranchani

Parthasarathy

Devi³

et al. 2017

Appl Nanosci

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A novel Ni complexed aminoclay (AC) catalyst was prepared by complexation method followed by reduction reaction. Various analytical techniques such as FTIR spectroscopy, UV-visible spectroscopy, DSC, TGA, SEM, HRTEM, EDX, XPS and WCA measurement are used to characterize the synthesized material. The AC-Ni catalyst system exhibited improved thermal stability and fiber-like morphology. The XPS results declared the formation of Ni nanoparticles. Thus, synthesized catalyst was tested towards the Schiff base formation reaction between various bio-medical polymers and aniline under air atmosphere at 85°C for 24 h. The catalytic activity of the catalyst was studied by varying the % weight loading of the AC-Ni system towards the Schiff base formation. The Schiff base formation was quantitatively calculated by the 1 H-NMR spectroscopy. While increasing the % weight loading of the AC-Ni catalyst, the % yield of Schiff base was also increased. The k app and Ti values were determined for the reduction of indole and a-terpineol in the presence of AC-Ni catalyst system. The experimental results were compared with the literature report.

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A nickel (II) PY5 complex as an electrocatalyst for water oxidation

Cited by 130 publications

References 57 publications

Catalytic Water Oxidation by a Bio-inspired Nickel Complex with a Redox-Active Ligand

Catalytic Water Oxidation by a Bio-inspired Nickel Complex with a Redox-Active Ligand

Mono‐/Multinuclear Water Oxidation Catalysts

Synthesis, characterization and catalytic activity of nanosized Ni complexed aminoclay

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