Mesoporous platinum nanosponges as electrocatalysts for the oxygen reduction reaction in an acidic electrolyte

Lee, Chien‐Liang; Wu, Chen-Chung; Chiou, Hsueh-Ping; Syu, Ciou-Mei; Huang, Chun-Hun; Yang, Chia-Chun

doi:10.1016/j.ijhydene.2011.03.034

Cited by 24 publications

(9 citation statements)

References 30 publications

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“…Modern search focuses on the development of novel drug delivery systems such as nanoporous and mesoporous (organic or inorganic based NSs) that have potential application in drug delivery and nanotherapeutics. Due to the toxicity caused by inorganic systems, research prominence has been laid on organic systems [21]. About decades ago, researchers have developed CD-based NSs to overcome the limitation of drug delivery and cancer therapeutics [3].…”

Section: Sehgal Et Almentioning

confidence: 99%

A Review on Nanosponges a Review on Nanosponges: A Boon to Targeted Drug Delivery for Anticancer Drug

Sehgal

Kanna

2019

Asian J Pharm Clin Res

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In recent decades, the rise in the investigation of new drugs had made health-care system expensive compared to conventional drug delivery systems and techniques. The present drug delivery systems have become highly productive and are growing fast. Majority of the anticancer agent has low water solubility resulting in multistep synthetic routes that require higher selectivity and specificity that can cause difficulty in the development of the formulation. Nanosponges (NSs) are branched cyclodextrin (CD) polymeric systems which have proven to be a boon in the pharmaceutical and biomedical fields. Different kinds of NSs based on different types of CDs and crosslinkers are used for developing of new drug formulations from the past few years for various applications in health care. Nanotechnology has overcome the issues regarding the drug solubility, stability, and other parameters and has attained success in achieving of sustained release, increased activity, improved permeability, delivery of nucleoprotein, the stimuli-responsive release of the drug, and improved drug bioavailability. There is a huge eruption of research on NSs for cancer treatment. Multiple anticancer moieties have been developed, taking into account the pharmacological and physicochemical perspective of the drug to develop a NS formulation. Our target in this review is to catch an efficient and far-reaching NSs for malignancy cancer treatment announced until now. This survey will give a perfect stage for providing details for researchers taking a shot at using new polymers for improving the treatment of the disease using nanotechnology. The present article provides details regarding antineoplastic molecules and provides ideas on CD-based NSs specifically using curcumin, tamoxifen, resveratrol, quercetin, oxygen-NSs, temozolomide, doxorubicin, and 5-fluorouracil (5-FU), and erlotinib (ETB) glutathione.

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Section: Sehgal Et Almentioning

confidence: 99%

A Review on Nanosponges a Review on Nanosponges: A Boon to Targeted Drug Delivery for Anticancer Drug

Sehgal

Kanna

2019

Asian J Pharm Clin Res

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“…[28,29] The precise control of chiral photoreactions or photochirogenesis is one of the most challenging topics in current photochemistry. A supramolecular approach to photochirogenes provides a convenient and also promising tool to facilitate excited-state chirality transfer from chiral host to prochiral substrate…”

Section: Moura and Lagomentioning

confidence: 99%

“…Cavalli et al developed NSs formulations as oxygen delivery systems for topical application which have the ability to store and to release the oxygen slowly over time. [29] As a protective agent from light or degradation Gamma-oryzanol was encapsulated in the formation of NSs, showing a good protection from the photodegradation. A O/W emulsion and a gel were formulated with the gammaoryzanol-loaded NSs.…”

Section: Arkas Et Almentioning

confidence: 99%

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Pawar

2016

AJP

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The invention of nanosponges (NSs) has become a significant step toward overcoming the problems associated with conventional drug delivery. NS drug delivery system has emerged as one of the most promising fields in life science. These small sponges circulate around the body until they encounter the target site and stick on the surface and began to release the drug in a controlled and predictable manner which is more effective for a particular given dosage. The development of new colloidal carrier called NSs has the potential to solve these problems. Both lipophilic and hydrophilic drugs can be loaded in NSs. NS is a novel and emerging technology which offers controlled drug delivery for topical use. They can be crafted for targeting drugs to a specific site, prevent drug and protein degradation, and prolong the drug release in a controlled manner. NSs play a key role in targeting drug delivery in a controlled manner. In this review article, application of NSs, its preparation methods, and evaluation have been discussed.

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“…The drawbacks of Pt/C are as follows: (i) carbon surface oxidation induces surface poisoning of Pt active sites; (ii) Pt nanoparticles are trapped in micro pores of carbon support material and finally lead to inadequate accessibility of active sites for surface reactions and (iii) less Pt utilization and Pt dissolution/ aggregation/Oswald ripening from carbon substrate [4][5][6]. To provoke these issues, the self-stabilized Pt-based nanostructures such as nanowire [7], nanonetwork (NN) [8,9], nanoassembly [10], nanosponge [11], nanotube [12], nanochains [13], etc. were employed as electrocatalyst for ORR by many researchers.…”

Section: Introductionmentioning

confidence: 99%

“…Xia et al demonstrated the synthesis and electrochemical characterization of selfsupported Pt nanoassemblies for ORR and they found a significant drop in diffusion limited current with 10 % ECSA loss after 3000 potential cycles [10]. Lee et al have described the synthesis of PVP-stabilized mesoporous Pt nanosponge by electrochemical method with different sizes of nanosponge possessing higher ECSA between 103.8 and 162.8 m 2 /g for ORR in an acid medium [11]. Xu et al have reported the preparation of Pt 3 Ni NN by ethylene glycol-assisted method and they found mass activity of 0.11 mA/μg when compared with Pt NN (0.040 mA/μg) [8].…”

Section: Introductionmentioning

confidence: 99%

Pt3M (M: Co, Ni and Fe) Bimetallic Alloy Nanoclusters as Support-Free Electrocatalysts with Improved Activity and Durability for Dioxygen Reduction in PEM Fuel Cells

et al. 2016

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Pt 3 M (M: Co, Ni and Fe) bimetallic alloy nanoclusters were synthesized by a novel and simple chemical reduction approach, and employed as the promising electrocatalyst to accelerate the kinetics of oxygen reduction reaction (ORR) for polymer electrolyte membrane fuel cells. From XRD, the positive shift of diffraction angle confirms the alloy formation between Pt and M and the elemental composition was confirmed by energy dispersive X-ray spectroscopy analysis. The nanocluster morphology and particle size was determined using scanning and transmission electron microscopy analysis. The ORR kinetic parameters for Pt-M electrocatalysts were calculated and compared with reported Pt/C catalysts. Among the Pt-M electrocatalysts, Pt-Co was found to be the most efficient catalyst having the higher mass and specific activity (at 0.9 V vs. RHE) of 0.44 mA/μg and 0.69 mA/cm 2 , respectively. The accelerated durability test reveals that the Pt-M bimetallic alloy nanoclusters retain appreciable surface area and mass activity after 8000 potential cycles confirms good long-term durability, and also competing with the reported benchmark ORR catalysts.

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Mesoporous platinum nanosponges as electrocatalysts for the oxygen reduction reaction in an acidic electrolyte

Cited by 24 publications

References 30 publications

A Review on Nanosponges a Review on Nanosponges: A Boon to Targeted Drug Delivery for Anticancer Drug

A Review on Nanosponges a Review on Nanosponges: A Boon to Targeted Drug Delivery for Anticancer Drug

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Pt3M (M: Co, Ni and Fe) Bimetallic Alloy Nanoclusters as Support-Free Electrocatalysts with Improved Activity and Durability for Dioxygen Reduction in PEM Fuel Cells

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