Artificial Photosynthesis Beyond Water Splitting for Environmental Remediation

Chin, Kek Foo; Đokić, Miloš; Soo, Han Sen

doi:10.1016/j.trechm.2020.02.012

Cited by 26 publications

(22 citation statements)

References 15 publications

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“…In terms of the FE that we obtained for 2 , it is comparable to that of other related complexes, but in aqueous solutions it are significantly lower. This can be attributed to the oxidation of ammonia to nitrate and/or nitrite as has been described for Ru-aqua complexes [Ru(H 2 O)(trpy)(bpy)] 2+ , and [Ru(H 2 O)(N 4 py)] 2+ (N 4 Py is N , N -bis(2-pyridylmethyl)- N -bis(2-pyridyl)-methylamine). , …”

Section: Resultsmentioning

confidence: 80%

“…Two centuries ago, the broad employment of fossil fuels stood at the beginning of the industrial revolution and the modern era of technology. , However, the excessive use of them is mainly responsible for today’s global warming and its associated catastrophes. It is thus highly urgent to develop alternative clean and renewable energy resources. − …”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Structure, and Ammonia Oxidation Catalytic Activity of Ru-NH₃ Complexes Containing Multidentate Polypyridyl Ligands

et al. 2021

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Ammonia (electro)oxidation with molecular catalysts is a rapidly developing topic with wide practical applications ahead. We report here the catalytic ammonia oxidation reaction (AOR) activity using [Ru(tda-κ-N3O)(py)2], 2, (tda2– is 2,2′:6′,2′′-terpyridine-6,6′′-dicarboxylate; py is pyridine) as a catalyst precursor. Furthermore, we also describe the rich chemistry associated with the reaction of Ru-tda and Ru-tPa (tPa–4 is 2,2′:6′,2′′-terpyridine-6,6′′-diphosphonate) complexes with NH3 and N2H4 using [RuII(tda-κ-N3O)(dmso)Cl] (dmso is dimethyl sulfoxide) and [RuII(tPa-κ-N3O)(py)2], 8, as synthetic intermediates, respectively. All the new complexes obtained here were characterized spectroscopically by means of UV–vis and NMR. In addition, a crystal X-ray diffraction analysis was performed for complexes trans-[RuII(tda-κ-N3)(py)2(NH3)], 4, trans-[RuII(tda-κ-N3)(N-NH2)(py)2], 5, cis-[RuII(tda-κ-N3)(py)(NH3)2], 6 (30%), and cis-[RuII(tda-k-N3)(dmso)(NH3)2], 7 (70%). The AOR activity associated with 2 and 8 as catalyst precursors was studied in organic and aqueous media. For 2, turnover numbers of 7.5 were achieved under bulk electrolysis conditions at an E app = 1.4 V versus normal hydrogen electrode in acetonitrile. A catalytic cycle is proposed based on electrochemical and kinetic evidence.

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Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Synthesis, Structure, and Ammonia Oxidation Catalytic Activity of Ru-NH₃ Complexes Containing Multidentate Polypyridyl Ligands

et al. 2021

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“…Since the existing artificial photosynthetic systems such as water splitting involve both water oxidation and reduction processes for H2 production, this oxidative solid waste upcycling via LMCT chemistry demonstrated by the Soo group can potentially serve as an alternative to the conventional water oxidation process to generate more valuable products, such as fuels and fine chemicals, in comparison to the O2 from water oxidation. [51][52][53][54][55] Besides well-defined V V complexes with redox non-innocent ligands, the Wang group has shown that commercially available V complexes with simpler ligands such as VO(acac)2 (acac = This is the author's peer reviewed, accepted manuscript. However, the online version of record will be different from this version once it has been copyedited and typeset.…”

Section: Please Cite This Article Asmentioning

confidence: 99%

Emergence of ligand-to-metal charge transfer in homogeneous photocatalysis and photosensitization

Kong

Tan

et al. 2022

Chemical Physics Reviews

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Light energy can be harnessed by photosensitizers or photocatalysts so that some chemical reactions can be carried out under milder conditions compared to the traditional heat-driven processes. To facilitate the photo-driven reactions, a large variety of chromophores that are operated via charge transfer excitations have been reported because of their typically longer excited-state lifetimes, which are the key to the downstream photochemical processes. Although both metal-to-ligand charge transfers and ligand-to-metal charge transfers are well-established light absorption pathways; the former has been widely adopted in photocatalysis, whereas the latter has recently taken on greater importance in photosensitization applications. In this article, we review the latest developments on ligand-to-metal charge transfer photosensitization by molecular complexes across the periodic table by focusing homogeneous photocatalysis and the use of photophysical measurements and computational calculations to understand the electronic structures, photochemical processes, structure–activity relationships, and reaction mechanisms. We also present our perspectives on the possible future developments in the field.

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“…Photocatalysis and photoelectrocatalysis are of interest to a number of technologies associated with sustainability including waste remediation, 1,2 upcycling of plastics, 3,4 solar water splitting, [5][6][7][8] and solar carbon dioxide reduction. [9][10][11][12] Some of the underlying chemical transformations associated with these processes are comparatively simple: for example, in water splitting there are limited pathways for unwanted byproducts and separation is simplified by the fact that the products are insoluble gases.…”

Section: Introductionmentioning

confidence: 99%

Design principles of tandem cascade photoelectrochemical devices

Kong

Warren

Greenaway

et al. 2021

Sustainable Energy Fuels

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Artificial Photosynthesis Beyond Water Splitting for Environmental Remediation

Cited by 26 publications

References 15 publications

Synthesis, Structure, and Ammonia Oxidation Catalytic Activity of Ru-NH₃ Complexes Containing Multidentate Polypyridyl Ligands

Synthesis, Structure, and Ammonia Oxidation Catalytic Activity of Ru-NH₃ Complexes Containing Multidentate Polypyridyl Ligands

Emergence of ligand-to-metal charge transfer in homogeneous photocatalysis and photosensitization

Design principles of tandem cascade photoelectrochemical devices

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Artificial Photosynthesis Beyond Water Splitting for Environmental Remediation

Cited by 26 publications

References 15 publications

Synthesis, Structure, and Ammonia Oxidation Catalytic Activity of Ru-NH3 Complexes Containing Multidentate Polypyridyl Ligands

Synthesis, Structure, and Ammonia Oxidation Catalytic Activity of Ru-NH3 Complexes Containing Multidentate Polypyridyl Ligands

Emergence of ligand-to-metal charge transfer in homogeneous photocatalysis and photosensitization

Design principles of tandem cascade photoelectrochemical devices

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Product

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Synthesis, Structure, and Ammonia Oxidation Catalytic Activity of Ru-NH₃ Complexes Containing Multidentate Polypyridyl Ligands

Synthesis, Structure, and Ammonia Oxidation Catalytic Activity of Ru-NH₃ Complexes Containing Multidentate Polypyridyl Ligands