Efficient photocatalytic hydrogen evolution with end-group-functionalized cobaloxime catalysts in combination with graphite-like C<sub>3</sub>N<sub>4</sub>

Song, Xiaohong; Wen, Hui; Cheng, Bing; Cui, Hong; Chen, Hui; Chen, Chang Neng

doi:10.1039/c4ra01413h

Cited by 43 publications

(44 citation statements)

References 60 publications

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“…This turns the homogeneous system into a hybrid one. The most widely used are nanoparticles (TiO 2 , ZnS, GaP), carbonaceous semiconductors (g‐C 3 N 4 ), and quantum dots (CdS, CdTe, CdSe) …”

Section: Influence Of System Units On Photocatalytic Performancementioning

confidence: 99%

Comprehensive review and future perspectives on the photocatalytic hydrogen production

Corredor

Rivero

Rangel

et al. 2019

J of Chemical Tech & Biotech

160

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Hydrogen represents a renewable energy alternative that may positively contribute to get over the global energy crisis while at the same time reducing its environmental burden. Overcoming the challenge of reaching this potential could be helped by careful choice of hydrogen (H2) sources. Photocatalytic generation of H2, although a minor alternative, appears to be a very good option at the time that liquid wastes are being degraded; therefore, this approach has given rise to an increasing number of interesting studies. Here, we aim to provide an integrated overview of the different photocatalytic, heterogeneous, homogeneous and hybrid systems. First, we categorize the units and mechanisms that take part in the photocatalytic process, and secondly we analyze their role and draw comparative conclusions. Thus, we analyze the role of (i) the electron source to carry out proton reduction, (ii) the proton source, which can be free protons in the medium or a proton donor compound, (iii) the catalyst nature and concentration, and (iv) the photosensitizer nature and concentration. We also provide an analysis of the influence of the solvent, especially in homogenous systems as well as the influence of pH. We provide a comparison of the photocatalytic performance, highlighting the advantages and disadvantages, of different systems. Thus, this review is, on the one hand, an update on the state of the art of photocatalytic generation of H2 from a full perspective that integrates homogeneous, heterogeneous and hybrid systems, and, on the other, a source of useful information for future research. © 2019 Society of Chemical Industry

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Section: Influence Of System Units On Photocatalytic Performancementioning

confidence: 99%

Comprehensive review and future perspectives on the photocatalytic hydrogen production

Corredor

Rivero

Rangel

et al. 2019

J of Chemical Tech & Biotech

160

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“…Aw eak p-p stacking interaction between the polymeric phthalocyanine sheet and tri-s-triazine units of mpg-CN x may contribute toward the facile charge transport through the interface. [17] Thec obalt content in the hybrids (mpg-CN x j CoPPc a ; a = mmol Co g À1 ) was modulated by controlling the amount of TCNB during the synthesis.C atalyst loadings,d etermined by inductively coupled plasma optical emission spectrometry (ICP-OES), were in the range of 4.1-107 mmol Co g À1 with higher Co content causing av isible intensification of green color of the solid ( Figure S1).…”

Section: Souvik Roya Nd Erwin Reisner*mentioning

confidence: 99%

Visible‐Light‐Driven CO₂ Reduction by Mesoporous Carbon Nitride Modified with Polymeric Cobalt Phthalocyanine

Roy

Reisner

2019

Angewandte Chemie

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The integration of molecular catalysts with low-cost, solid light absorbers presents apromising strategy to construct catalysts for the generation of solar fuels.H ere,w er eport aphotocatalyst for CO 2 reduction that consists of apolymeric cobalt phthalocyanine catalyst (CoPPc) coupled with mesoporous carbon nitride (mpg-CN x )a st he photosensitizer.T his precious-metal-free hybrid catalyst selectively converts CO 2 to CO in organic solvents under UV/Vis light (AM 1.5G, 100 mW cm À2 , l > 300 nm) with ac obalt-based turnover number of 90 for CO after 60 h. Notably,t he photocatalyst retains 60 %C Oe volution activity under visible light irradiation (l > 400 nm) and displays moderate water tolerance.The in situ polymerization of the phthalocyanine allows control of catalyst loading and is key for achieving photocatalytic CO 2 conversion.Photocatalytic reduction of CO 2 to produce storable fuels offers an attractive path to capture and utilize the greenhouse gas CO 2 and ultimately implement ac arbon-neutral energy cycle.T he development of efficient, sustainable,a nd economically viable catalysts and light-absorbers lies at the nexus of solar-fuel research on CO 2 utilization. Hybrid photosynthetic systems with molecular catalysts immobilized on solid supports (light-absorbing semiconductors or dye-sensitized semiconductors) have recently emerged as ap romising approach for suspension-based photoreactor applications, because they combine the selectivity of molecules with the durability of heterogeneous materials. [1] While many earth abundant metal based molecular complexes have been reported for CO 2 reduction in homogeneous solution, there are relatively few examples of heterogenization of these catalysts on solid light-absorbers. [2] Thed evelopment of new robust catalyst-photosensitizer interfaces remains achallenge that offers the key for improved photocatalytic activity of colloidal material-molecule hybrid systems.Graphitic carbon nitride (g-CN x )has recently emerged as ap romising semiconductor for photocatalytic applications, [3] including water splitting [4] and CO 2 reduction, [5] because of its nontoxicity,facile synthesis,capability to absorb UV as well as visible light, and durability under photochemical conditions. Ar elatively narrow band gap and sufficiently negative conduction band energy minimum (À1.10 Vv s. NHE at pH 6.6) [4b, 6] allow g-CN x to harvest UV/Vis light and subsequently reduce as urface-bound molecular catalyst via photoinduced electron transfer. In CN x -based photocatalytic systems for CO 2 reduction, different types of co-catalysts have been used, including weakly anchoring phosphonic acid functionalized Ru complexes or Ru-Re dyads, [6,7] molecular cobalt and iron complexes in solution, [8] metalloporphyrins covalently grafted on CN x , [9] single-atom cobalt sites incorporated in the material, [10] and sodium niobite nanowires. [11] Despite encouraging reports with CN x -porphyrin hybrid catalysts, [9,12] aC N x /molecular catalyst system that consists of only earth-abun...

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“…[10] It can be easily synthesized by condensation of cyanamide, dicyandiamide, or melamine at elevated temperatures and displays high activities and photostability of more than 72 h. [10b] The material has well-suited band positions for water splitting and a band gap of approximately 2.7 eV with a conduction band potential at À0.8 V vs. RHE. [10a,b] Cocatalyst integration of non-noble metals, [11] Pt, [10b, 12] Ni-(TEOA) 3 2+ (TEOA = triethanolamine), [13] and cobaloximes [14] with CN x has previously been used as a strategy to enhance H 2 evolution rates.In this study, we report a photocatalytic CN x -enzyme hybrid system for visible-light-driven H 2 generation (Figure 1). This CN x -H 2 ase hybrid assembly operates in an [*] Dr.…”

mentioning

confidence: 99%

“…8 V vs. RHE. [10a,b] Cocatalyst integration of non-noble metals, [11] Pt, [10b, 12] Ni-(TEOA) 3 2+ (TEOA = triethanolamine), [13] and cobaloximes [14] with CN x has previously been used as a strategy to enhance H 2 evolution rates.…”

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confidence: 99%

Photocatalytic Hydrogen Production using Polymeric Carbon Nitride with a Hydrogenase and a Bioinspired Synthetic Ni Catalyst

et al. 2014

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Solar-light-driven H2 production in water with a [NiFeSe]-hydrogenase (H2ase) and a bioinspired synthetic nickel catalyst (NiP) in combination with a heptazine carbon nitride polymer, melon (CNx), is reported. The semibiological and purely synthetic systems show catalytic activity during solar light irradiation with turnover numbers (TONs) of more than 50 000 mol H2 (mol H2ase)−1 and approximately 155 mol H2 (mol NiP)−1 in redox-mediator-free aqueous solution at pH 6 and 4.5, respectively. Both systems maintained a reduced photoactivity under UV-free solar light irradiation (λ>420 nm).

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Efficient photocatalytic hydrogen evolution with end-group-functionalized cobaloxime catalysts in combination with graphite-like C₃N₄

Abstract: The pyrene-functionalized cobaloxime–g-C3N4 system was active for hydrogen production in CH3CN–H2O mixed solvent with a highest TON of 281.

Cited by 43 publications

References 60 publications

Comprehensive review and future perspectives on the photocatalytic hydrogen production

Comprehensive review and future perspectives on the photocatalytic hydrogen production

Visible‐Light‐Driven CO₂ Reduction by Mesoporous Carbon Nitride Modified with Polymeric Cobalt Phthalocyanine

Photocatalytic Hydrogen Production using Polymeric Carbon Nitride with a Hydrogenase and a Bioinspired Synthetic Ni Catalyst

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Efficient photocatalytic hydrogen evolution with end-group-functionalized cobaloxime catalysts in combination with graphite-like C3N4

Abstract: The pyrene-functionalized cobaloxime–g-C3N4 system was active for hydrogen production in CH3CN–H2O mixed solvent with a highest TON of 281.

Cited by 43 publications

References 60 publications

Comprehensive review and future perspectives on the photocatalytic hydrogen production

Comprehensive review and future perspectives on the photocatalytic hydrogen production

Visible‐Light‐Driven CO2 Reduction by Mesoporous Carbon Nitride Modified with Polymeric Cobalt Phthalocyanine

Photocatalytic Hydrogen Production using Polymeric Carbon Nitride with a Hydrogenase and a Bioinspired Synthetic Ni Catalyst

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Efficient photocatalytic hydrogen evolution with end-group-functionalized cobaloxime catalysts in combination with graphite-like C₃N₄

Visible‐Light‐Driven CO₂ Reduction by Mesoporous Carbon Nitride Modified with Polymeric Cobalt Phthalocyanine