دانلود رایگان مقاله لاتین اکسید کبالت محکم شده بر نیتروژن از سایت الزویر
عنوان فارسی مقاله:
اکسید کبالت محکم شده بر نیتروژن و گوگرد دوپ دوتایی فوم گرافن به عنوان کاتالیزور الکترود اکسیژن موثر در وسایل قلیایی
عنوان انگلیسی مقاله:
Cobalt oxide anchored on nitrogen and sulfur dual-doped graphene foam as an effective oxygen electrode catalyst in alkaline media
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
To cater the increasing energy demand and relax the current environment pollution, numerous research has been dedicated to oxygen reaction-based energy conversion and/or storage techniques [1–4]. However,the oxygen reactions suffer from kinetically sluggish problems due to the complex four-electron process, so that catalysts are employed to accelerate oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) processes. Currently, Pt-based alloys and RuO2 function as the best ORR and OER catalysts, respectively, while their respective OER and ORR performance is poor [5,6]. Besides, these noble metals are scarce, and they face high cost in large-scale applications. Consequently, one of the great challenges being faced is to develop clean, abundant and efficient alternative oxygen electrode catalysts. To date, the first row transition metals have been studied generally as active electrode materials featured with high catalytic ability for both ORR and OER, such as cobalt and its derives, including mixed-metal oxides [7,8], hydro(oxy) oxides [4,9], phosphates [10], chalcogenides [11,12], and perovskites [3,13]. Among them, Co3O4 is popular for affording small overpotential and highstability in alkaline media. Recent theoretical studies have demonstrated that the exposed Co3O4 (110), (111) and (311) surface planes are of highly catalytic activity for OER [14–16]. However, the easy aggregation and low conductivity of pure Co3O4 decrease the active sites and hamper the transport of electrons during the oxygen reaction process. On the contrary, graphene support with its open ended structure, high electrical conductivity, large surface area and high chemical stability is desirable to derive 3d metalbased composite catalysts [17]. And the combination of Co3O4 and heteroatoms doped graphene presented excellent ORR and OER performance [3,13]. For example, several remarkable Co3O4- based OER catalysts by adhering them on graphene sheets have been prepared [14,18,19]. When Co3O4 anchored on N and/or Sdoped graphene, the synergistic effects attributed a lot to the ORR and/or OER abilities [3,13,20–22]. In these cases, nitrogen doping in graphene creates a net positive charge on adjacent carbon atoms to accelerate the adsorptionof O2, andleads tomore active sites,larger surface areas, and higher defect density [20,23], facilitating ORR [13,20,22]. Moreover, sulfur doped graphene performed enhanced ORR efficiency due to the nearly electronegativities between sulfur and carbon [10,20,24,25], and the nitrogen and sulfur co-doping generated synergistic effects. However, the structure of cobalt oxide existed differently, and reports on cobalt oxide exposing specific surface planes in catalyzing embedded in nitrogen and sulfur dual-doped 3D graphene as bifunctional catalysts were still not many.
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کلمات کلیدی:
Palladium Nanoparticles Supported on Nitrogen and Sulfur Dual ... pubs.acs.org/doi/abs/10.1021/acsami.6b01580 by X Zhang - 2016 - Cited by 8 - Related articles Apr 15, 2016 - One-Pot Anchoring of Pd Nanoparticles on Nitrogen-Doped Carbon through ... of Pd Oxide-rich Pd Particles on Nitrogen/Sulfur Co-Doped Graphene with Remarkably ... Nitrogen-doped graphene supported palladium-nickel ... Nitrogen and Phosphorus Dual-Doped Graphene ... - ACS Publications pubs.acs.org/doi/abs/10.1021/acscatal.5b00601?src=recsys May 27, 2015 - Design Principles for Dual-Element-Doped Carbon Nanomaterials as ..... Cobalt oxide anchored on nitrogen and sulfur dual-doped graphene ... Fe9S10-decorated N, S co-doped graphene as a new and efficient ... pubs.rsc.org/EN/content/articlelanding/2017/cy/c6cy02215d ... metal nanocrystals and heteroatom-doped graphene have been intensively ... a novel hybrid comprising Fe9S10 anchored onto nitrogen and sulfur dual-doped. [PDF]Fe 9 S 10-decorated N, S co-doped graphene as a new and efficient ... pubs.rsc.org/-/content/articlepdf/2017/cy/c6cy02215d by XX Ma - 2017 Jan 30, 2017 - (HER), the methanol oxidation reaction (MOR), etc.13 Addi- tionally ... Fe9S10 nanocrystals anchored on N, S dual-doped graphene. (N,S-G) were fabricated for ..... ports that sulfur could promote a nitrogen doping ability.7,30. Core-Shell Co/CoO Integrated on 3D Nitrogen Doped Reduced ... https://www.ncbi.nlm.nih.gov › NCBI › Literature › PubMed Central (PMC) by M Wang - 2016 - Cited by 2 - Related articles Aug 22, 2016 - To our best knowledge, some of cobalt oxides and graphene aerogel composites ... To synthesize nitrogen doped reduced graphene oxide aerogel (NGA), the ..... Sulfur and nitrogen dual-doped mesoporous graphene electrocatalyst for .... Graphene-based 3D composite hydrogel by anchoring Co3O4 ... Xingquan He - Citas de Google Académico scholar.google.es/citations?user=rRG-RpkAAAAJ&hl=es Changchun University of Science and Technology - cust.edu.cn Iron (II) phthalocyanine covalently functionalized graphene as a highly ... Cobalt oxide anchored on nitrogen and sulfur dual-doped graphene foam as an ... Searches related to oxide anchored on nitrogen and sulfur dual-doped graphene phosphorus doped graphene cobalt sulfide solubility cobalt sulphide cobalt 3 sulfide formula cobalt sulfide formula cobalt sulfite cobalt sulfate copper sulfide
