A highly stable and scalable photosynthetic reaction center–graphene hybrid electrode system for biomimetic solar energy transduction

Zhang, Haojie; Carey, Anne-Marie; Jeon, Ki Wan; Liu, Minghui; Murrell, Travis D.; Locsin, Joshua; Lin, Su; Yan, Hao; Woodbury, Neal W.; Seo, Dong Kyun

doi:10.1039/c6ta10458d

Cited by 15 publications

(13 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A highly stable and scalable RC electrode was reported by directly immobilizing RCs isolated from cultures of Rb. sphaeroides 2.4.1 on a flexible and transparent mercapto reduced graphene oxide (mRGO) electrode . RCs immobilized on a mRGO film were proven to be robust to retain the photoactivity after 20 week storage under dark and even after 24 h continuous photoirradiation at room temperature in the air …”

Section: Immobilization Of Photosynthetic Reaction Centers and Model mentioning

confidence: 99%

Immobilization of Molecular Catalysts for Enhanced Redox Catalysis

2018

View full text Add to dashboard Cite

In the homogenous phase, redox catalysts are often deactivated by bimolecular reactions. For example, the charge‐separated state of photoredox catalysts decayed via bimolecular back electron transfer reactions between the charge‐separated molecules to decrease the lifetimes of the catalytically active species. When photoredox catalysts are immobilized on solid supports, the lifetime of the charge‐separated state was remarkably elongated to enhance the photocatalytic activity. Immobilization of photoredox catalysts on electrodes is required for photocurrent generation, leading to development of solar cells. Metal‐oxygen intermediates, which are active for oxidation of various substrates including water oxidation, are also deactivated via bimolecular reactions to produce inactive forms such as dinuclear metal bis‐μ‐oxo complexes. Immobilization of metal complex catalysts on solid supports prohibits the bimolecular deactivation, enhancing the catalytic activity and stability. This Review focuses on recent development of immobilization of both organic and inorganic molecular catalysts on various supports for enhancement of the catalytic activity, selectivity and stability in thermal and photoinduced redox reactions.

show abstract

Section: Immobilization Of Photosynthetic Reaction Centers and Model mentioning

confidence: 99%

Immobilization of Molecular Catalysts for Enhanced Redox Catalysis

2018

View full text Add to dashboard Cite

show abstract

“…Developing active and robust water oxidation catalysts is the key to constructing efficient artificial photosynthetic systems [ 3 , 4 , 5 , 6 ]. The oxidation of water is the primary and key reaction of overall water splitting, but it requires the transfer of 4 electrons (e − ) and 4H + with continuous formation of O-O bonds, leading to high energy barriers and slow kinetics [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Silver-Based Biomimetics Composites

et al. 2021

View full text Add to dashboard Cite

Different Ag@TiO2 and Ag@ZnO catalysts, with nanowire (NW) structure, were synthesized containing different amounts of silver loading (1, 3, 5, and 10 wt.%) and characterized by FE-SEM, HRTEM, BET, XRD, Raman, XPS, and UV–vis. The photocatalytic activity of the composites was studied by the production of hydrogen via water splitting under UV–vis light and the degradation of the antibiotic ciprofloxacin. The maximum hydrogen production of all the silver-based catalysts was obtained with a silver loading of 10 wt.% under irradiation at 500 nm. Moreover, 10%Ag@TiO2 NWs was the catalyst with the highest activity in the hydrogen production reaction (1119 µmol/hg), being 18 times greater than the amount obtained with the pristine TiO2 NW catalyst. The most dramatic difference in hydrogen production was obtained with 10%Ag@TiO2-P25, 635 µmol/hg, being 36 times greater than the amount reported for the unmodified TiO2-P25 (18 µmol/hg). The enhancement of the catalytic activity is attributed to a synergism between the silver nanoparticles incorporated and the high surface area of the composites. In the case of the degradation of ciprofloxacin, all the silver-based catalysts degraded more than 70% of the antibiotic in 60 min. The catalyst that exhibited the best result was 3%Ag@ZnO commercial, with 99.72% of degradation. The control experiments and stability tests showed that photocatalysis was the route of degradation and the selected silver-based catalysts were stable after seven cycles, with less than 1% loss of efficiency per cycle. These results suggest that the catalysts could be employed in additional cycles without the need to be resynthesized, thus reducing remediation costs.

show abstract

“…A potential candidate could be sensing, and the potential of light-powered RC and RC-LH1 electrodes for applications such as herbicide biosensing, [39][40][41] and touch sensing [42,43] are being been explored. Although such applications would not necessarily require electrodes exhibiting long-term photocurrent stability, involving relatively brief measurements, they would require electrodes capable of being stored for long periods before use, [19,44] and the data summarized in Figure 5b were promising in this regard.…”

Section: Methodsmentioning

confidence: 99%

Sustaining Electron Transfer Pathways Extends Biohybrid Photoelectrode Stability to Years

Friebe

Barszcz²,

Jones

et al. 2022

Angew Chem Int Ed

View full text Add to dashboard Cite

The exploitation of natural photosynthetic enzymes in semi-artificial devices constitutes an attractive and potentially sustainable route for the conversion of solar energy into electricity and solar fuels. However, the stability of photosynthetic proteins after incorporation in a biohybrid architecture typically limits the operational lifetime of biophotoelectrodes to a few hours. Here, we demonstrate ways to greatly enhance the stability of a mesoporous electrode coated with the RC-LH1 photoprotein from Rhodobacter sphaeroides. By preserving electron transfer pathways, we extended operation under continuous high-light to 33 days, and operation after storage to over two years. Coupled with large photocurrents that reached peak values of 4.6 mA cm À 2 , the optimized biophotoelectrode produced a cumulative output of 86 C cm À 2 , the largest reported performance to date. Our results demonstrate that the factor limiting stability is the architecture surrounding the photoprotein, and that biohybrid sensors and photovoltaic devices with operational lifetimes of years are feasible.

show abstract

A highly stable and scalable photosynthetic reaction center–graphene hybrid electrode system for biomimetic solar energy transduction

Abstract: A highly stable and scalable photosynthetic reaction center–mercapto reduced graphene oxide system has been developed for solar energy transduction.

Cited by 15 publications

References 26 publications

Immobilization of Molecular Catalysts for Enhanced Redox Catalysis

Immobilization of Molecular Catalysts for Enhanced Redox Catalysis

Photocatalytic Activity of Silver-Based Biomimetics Composites

Sustaining Electron Transfer Pathways Extends Biohybrid Photoelectrode Stability to Years

Contact Info

Product

Resources

About