Synergistic effect of Ag plasmon- and reduced graphene oxide-embedded ZnO nanorod-based photoanodes for enhanced photoelectrochemical activity

Prasad, Mahanth; Sharma, Vidhika; Aher, Rahul; Rokade, Avinash; Ilaiyaraja, P.; Sudakar, C.; Jadkar, Sandesh

doi:10.1007/s10853-017-1436-4

Cited by 20 publications

(16 citation statements)

References 61 publications

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“…In this review, we introduced diverse preparation methods and advantages of graphene-supported metal SACs aimed at solving the above-mentioned challenges. We also summarized their applications in CO oxidation [5, [38][39][40], oxidation of benzene to phenol [41], HER [42,43], methanol oxidation reaction (MOR) [44][45][46], oxygen reduction reaction (ORR) [47][48][49][50], hydrogenation [32,51] and photoelectrocatalysis [52][53][54][55]. At last, we focused on the prospect and future developments of graphene-supported metal SACs.…”

Section: Introductionmentioning

confidence: 99%

Graphene-supported metal single-atom catalysts: a concise review

Ren

et al. 2020

Sci. China Mater.

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Single-atom catalysts (SACs) have become an emerging frontier trend in the field of heterogeneous catalysis due to their high activity, selectivity and stability. SACs could greatly increase the availabilities of the active metal atoms in many catalytic reactions by reducing the size to single atom scale. Graphene-supported metal SACs have also drawn considerable attention due to the unique lattice structure and physicochemical properties of graphene, resulting in superior activity and selectivity for several chemical reactions. In this paper, we review recent progress in the fabrications, advanced characterization tools and advantages of graphene-supported metal SACs, focusing on their applications in catalytic reactions such as CO oxidation, the oxidation of benzene to phenol, hydrogen evolution reaction, methanol oxidation reaction, oxygen reduction reaction, hydrogenation and photoelectrocatalysis. We also propose the development of SACs towards industrialization in the future.

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Section: Introductionmentioning

confidence: 99%

Graphene-supported metal single-atom catalysts: a concise review

Ren

et al. 2020

Sci. China Mater.

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“…EIS measurements were recorded in 0.5 M Na 2 SO 4 electrolyte at 0 V and the frequency was kept in the range of 0.1 to 100 kHz. The MS plot of all the synthesized photo‐anodes (1/C 2 vs. electrode potential) was recorded under darkness at a frequency of 500 Hz to obtain flat band potential (V fb ) and donor density (N d ) . Following equations were used to estimate the values of V fb and N d

true \frac{1}{C^{2}} = \frac{2}{q ϵ_{0} ϵ_{s} N_{D}} ([], V - V_{f b} - \frac{(k_{B} T)}{q})

true S = \frac{2}{q ϵ_{0} ϵ_{s} N_{D}}

true w = {[\frac{2 ϵ_{s} ϵ_{0}}{q N_{D}} (V - V_{f b})]}^{1 / 2}

…”

Section: Methodsmentioning

confidence: 99%

“…The MS plot of all the synthesized photo-anodes (1/ C 2 vs. electrode potential) was recorded under darkness at a frequency of 500 Hz to obtain flat band potential (V fb ) and donor density (N d ). [17] Following equations were used to estimate the values of V fb and N d 1…”

Section: Methodsmentioning

confidence: 99%

Ag−Au‐Bimetal Incorporated ZnO‐Nanorods Photo‐Anodes for Efficient Photoelectrochemical Splitting of Water

et al. 2018

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Plasmonic Ag−Au/ZnO nanorods (ZNRs) based photo‐anodes were synthesized using a simple electrochemical route and were then evaluated for photoelectrochemical (PEC) activity. The amalgamation of Ag and Au nanoclusters broadens the UV‐Vis light absorption in the range of 400 nm to 650 nm. Ag−Au/ZNRs photo‐anodes had shown photocurrent density of ∼1.4 mA cm−2, at a bias of 0.75 V/SCE, which is ∼3.1 times of bare ZNRs photo‐anode. Bi‐metallic Ag−Au/ZNRs based photo‐anode shows the maximum photo‐conversion efficiency of 0.77 % at 0.5 V/SCE, under one sun illumination. Formation of hot electrons in Ag−Au/ZNRs photo‐anodes can be partly held responsible for the enhanced PEC activity. Au/Ag core/shell morphology evolves when a thin layer of Ag is loaded on Au nanoparticles. For an in‐depth analysis on Ag−Au incorporated ZNRs based photo‐anodes and its PEC activity, a detailed characterization was carried out using physico‐chemical, spectral and microscopy techniques. The analysis shows that Au in direct contact with ZnO interacts mainly with oxygen vacancies present on surface of ZnO and Ag interacts with Au for an effective electron‐hole segregation process at their interface and electron storage occurs in metal nanoparticles. The results suggest bi‐metal incorporated ZNRs based photo‐anodes can be a prospective candidate for PEC water splitting application.

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“…At present, the prevalent approach to enhance light absorption of ZnO/graphene nanocomposite is to intercalate it with silver (Ag) nanoparticles. 132,133 The localized surface plasmonic effect induced from Ag will promote the optical absorption of DSSCs and hence stimulate the charge transfer and light-harvesting efficiencies. 134,135 Besides, mirror-like nanocuboidal ceria act as light-harvesting boosters had been utilized to improve the light scattering of photoanode.…”

Section: Limitations Of Zno/graphene Derivatives As Photoanode and Th...mentioning

confidence: 99%

Zinc oxide/graphene nanocomposite as efficient photoelectrode in dye‐sensitized solar cells: Recent advances and future outlook

Mahalingam

Low

Omar

et al. 2022

Intl J of Energy Research

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Summary Dye‐Sensitized Solar Cells (DSSCs), also known as Grätzel cells, are a third‐generation photovoltaic technology that has garnered extensive interest due to its simplicity of fabrication, economical, and relatively high power conversion efficiency (PCE). The PCE of the photovoltaic cells is primarily related to the architecture of the cells, as well as the electrodes and electrolyte employed. Using zinc oxide (ZnO) coupled with two‐dimensional graphene as photoelectrode enables efficient charge transfer and minimizes electron–hole recombination in the DSSCs, resulting in improved performance. This review outlines the feasibility and performance enhancement of ZnO/graphene nanocomposite and its derivatives as photoelectrode for DSSCs. The structural features, optical properties, electron transport, and dye interaction of the ZnO/graphene nanocomposite‐based photoelectrode were considered in this review. In addition, the limitations of ZnO/graphene derivatives as photoelectrodes and their solutions were extensively discussed, as well as their prospects. The ZnO/graphene‐based photovoltaic cells exhibit an efficiency of up to 11.5% under different dyes and electrolytes. The recent progress achieved with this photoelectrode, which is a viable substitute for titanium dioxide (TiO2), is also thoroughly reviewed.

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Synergistic effect of Ag plasmon- and reduced graphene oxide-embedded ZnO nanorod-based photoanodes for enhanced photoelectrochemical activity

Cited by 20 publications

References 61 publications

Graphene-supported metal single-atom catalysts: a concise review

Graphene-supported metal single-atom catalysts: a concise review

Ag−Au‐Bimetal Incorporated ZnO‐Nanorods Photo‐Anodes for Efficient Photoelectrochemical Splitting of Water

Zinc oxide/graphene nanocomposite as efficient photoelectrode in dye‐sensitized solar cells: Recent advances and future outlook

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