Abstract：
:Carbon nanomaterials' reactivity towards oxygen is very poor, limiting their potential applications. However, nitrogen doping is an established way to introduce active sites that facilitate interaction with gases. This boosts the materials' reactivity for bio-/gas sensing and enhances their catalytic performance for the oxygen reduction reaction. Despite this interest, the role of differently bonded nitrogen dopants in the interaction with oxygen is obscured by experimental challenges and has so far resisted clear conclusions. We study the interaction of molecular oxygen with graphene doped via nitrogen plasma by in situ high-resolution synchrotron techniques, supported by density functional theory core level simulations. The interaction leads to oxygen dissociation and the formation of carbon-oxygen single bonds on graphene, along with a band gap opening and a rounding of the Dirac cone. The change of the N 1 s core level signal indicates that graphitic nitrogen is involved in the observed mechanism: the adsorbed oxygen molecule is dissociated and the two O atoms chemisorb with epoxy bonds to the nearest carbon neighbours of the graphitic nitrogen. Our findings help resolve existing controversies and offer compelling new evidence of the ORR pathway.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Scardamaglia M,Susi T,Struzzi C,Snyders R,Di Santo G,Petaccia L,Bittencourt Cdoi
10.1038/s41598-017-08651-1subject
Has Abstractpub_date
2017-08-11 00:00:00pages
7960issue
1issn
2045-2322pii
10.1038/s41598-017-08651-1journal_volume
7pub_type
杂志文章abstract：:Highly selective hydrogenative carbon-carbon bond scission of biomass-derived platform oxygenates was achieved with a cerium oxide-supported ruthenium nanoparticle catalyst in water. The present catalyst enabled the selective cleavage of carbon-carbon σ bonds adjacent to carboxyl, ester, and hydroxymethyl groups, open...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-14373-1
更新日期：2017-10-25 00:00:00
abstract：:The risk of suffering from Alzheimer's disease (AD) is higher in individuals from AD-affected mothers. The purpose of this investigation was to study whether maternal transmission might produce AD-related alterations in progenies of mice that do not have any genotypic alteration. We used cognitively-intact mothers har...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-24710-7
更新日期：2018-04-24 00:00:00
abstract：:'Big data' in healthcare encompass measurements collated from multiple sources with various degrees of data quality. These data require quality control assessment to optimise quality for clinical management and for robust large-scale data analysis in healthcare research. Height and weight data represent one of the mos...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-66925-7
更新日期：2020-06-23 00:00:00
abstract：:Energy plants are the main source of bioenergy which will play an increasingly important role in future energy supplies. With limited cultivated land resources in China, the development of energy plants may primarily rely on the marginal land. In this study, based on the land use data from 1990 to 2010(every 5 years i...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep05816
更新日期：2014-07-24 00:00:00
abstract：:The activation and growth of tumour-initiating cells with stem-like properties in distant organs characterize colorectal cancer (CRC) growth and metastasis. Thus, inhibition of colon cancer stem cell (CCSC) growth holds promise for CRC growth and metastasis prevention. We and others have shown that farnesyl dimethyl c...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-80911-z
更新日期：2021-01-26 00:00:00
abstract：:A novel one-pot synthesis of tri-substituted purines and the discovery of purine analogues with trypanocidal activity are reported. The reaction is initiated by a metal-free oxidative coupling of primary alkoxides and diaminopyrimidines with Schiff base formation and subsequent annulation in the presence of large N,N-...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep09139
更新日期：2015-03-16 00:00:00
abstract：:Automated vehicles (AVs) will change the role of the driver, from actively controlling the vehicle to primarily monitoring it. Removing the driver from the control loop could fundamentally change the way that drivers sample visual information from the scene, and in particular, alter the gaze patterns generated when un...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-80126-2
更新日期：2021-01-08 00:00:00
abstract：:Two yellow luminescence bands related to different defects have been revealed in undoped GaN grown by hydride vapor phase epitaxy (HVPE). One of them, labeled YL1, has the zero-phonon line (ZPL) at 2.57 eV and the band maximum at 2.20 eV at low temperature. This luminescence band is the ubiquitous yellow band observed...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-26354-z
更新日期：2018-05-25 00:00:00
abstract：:In music, the perception of pitch is governed largely by its tonal function given the preceding harmonic structure of the music. While behavioral research has advanced our understanding of the perceptual representation of musical pitch, relatively little is known about its representational structure in the brain. Usin...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-19222-3
更新日期：2018-01-16 00:00:00
abstract：:Perilla frutescens (L.) is an important medicinal and edible plant in China with nutritional and medical uses. The extract from leaves of Perilla frutescens contains flavonoids and volatile oils, which are mainly used in traditional Chinese medicine. In this study, we analyzed the transcriptomic and metabolomic data o...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-73274-y
更新日期：2020-10-01 00:00:00
abstract：:Neuropeptide Y Y1 receptors (Y1R) have been found to be overexpressed in a number of different tumours, such as breast, ovarian or renal cell cancer. In mammary carcinoma the high Y1R density together with its high incidence of 85% in primary human breast cancers and 100% in breast cancer derived lymph node metastases...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-019-49399-0
更新日期：2019-09-10 00:00:00
abstract：:It has been hypothesised that speed information, encoded by 'speed cells', is important for updating spatial representation in the hippocampus and entorhinal cortex to reflect ongoing self-movement during locomotion. However, systematic characterisation of speed representation is still lacking. In this study, we compa...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-58194-1
更新日期：2020-01-29 00:00:00
abstract：:Pancreatic cancer (PC), as the leading cause of cancer death worldwide, is one of the deadliest tumors with a very low 5-year survival rate. Therefore, it is urgent to seek new biomarkers of PC for more accurate and reliable treatments. To identify the differentially expressed miRNAs (DEM) in PC tissues, we performed ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-11248-3
更新日期：2017-09-13 00:00:00
abstract：:Phaseonium is a three-level Λ quantum system, in which a coherent microwave and an optical control (pump) beams can be used to actively modulate the dielectric response. Here we propose a new metamaterial structure comprising of a periodic array of triangular phaseonium metamolecules arranged as a trefoil. We present ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep21083
更新日期：2016-02-16 00:00:00
abstract：:Although oxide-based resistive switching memory (OxRAM) is one of the strong next-generation high capacity memory candidates, it has the critical disadvantage that deviations of resistance levels is too severe to be adopted as a high capacity memory device. More specifically, it is known that the larger on/off current...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-018-35838-x
更新日期：2019-01-22 00:00:00
abstract：:We study the spin and valley dependent transport in a silicene superlattice under the influence of a magnetic exchange field, a perpendicular electric field and a voltage potential. It is found that a gate-voltage-controllable fully spin and valley polarized current can be obtained in the proposed device, and the spin...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep33701
更新日期：2016-09-20 00:00:00
abstract：:Wood density (WD) relates to important tree functions such as stem mechanics and resistance against pathogens. This functional trait can exhibit high intraindividual variability both radially and vertically. With the rise of LiDAR-based methodologies allowing nondestructive tree volume estimations, failing to account ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-58733-w
更新日期：2020-02-06 00:00:00
abstract：:The significant risk of disease transmission has selected for effective immune-defense strategies in insect societies. Division of labour, with individuals specialized in immunity-related tasks, strongly contributes to prevent the spread of diseases. A trade-off, however, may exist between phenotypic specialization to...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-65780-w
更新日期：2020-06-02 00:00:00
abstract：:The phytohormone auxin is a major determinant and regulatory component important for plant development. Auxin transport between cells is mediated by a complex system of transporters such as AUX1/LAX, PIN, and ABCB proteins, and their localization and activity is thought to be influenced by phosphatases and kinases. Fl...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep41906
更新日期：2017-02-06 00:00:00
abstract：:The increasing availability of electronic health care records has provided remarkable progress in the field of population health. In particular the identification of disease risk factors has flourished under the surge of available data. Researchers can now access patient data across a broad range of demographics and g...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep30465
更新日期：2016-07-27 00:00:00
abstract：:This study aims to identify patterns of surface heat fluxes, and corresponding surface ocean responses, associated with synoptic-scale atmospheric events and their modulation on seasonal time scales. In particular, northerly and southerly wind events associated with atmospheric disturbances were analyzed using high-te...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-80665-8
更新日期：2021-01-11 00:00:00
abstract：:Numerous studies have been conducted to examine the molecular mechanism of Haemophilus parasuis resistance to antibiotic, but rarely to tildipirosin. In the current study, transcriptional profiling was applied to analyse the variation in gene expression of JS0135 and tildipirosin-resistant JS32. The growth curves show...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-07972-5
更新日期：2017-08-08 00:00:00
abstract：:Exolysin (ExlA) is a recently-identified pore-forming toxin secreted by a subset of Pseudomonas aeruginosa strains identified worldwide and devoid of Type III secretion system (T3SS), a major virulence factor. Here, we characterized at the ultrastructural level the lesions caused by an ExlA-secreting strain, CLJ1, in ...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-017-02349-0
更新日期：2017-05-18 00:00:00
abstract：:The domain wall-related change in the anisotropic magnetoresistance in L-shaped permalloy nanowires is measured as a function of the magnitude and orientation of the applied magnetic field. The magnetoresistance curves, compiled into so-called domain wall magnetoresistance state space maps, are used to identify highly...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep06045
更新日期：2014-08-13 00:00:00
abstract：:This paper presents a digital elevation model (DEM) of the dunes found in the Lençóis Maranhenses National Park, an environmental protection area located in the Maranhão state (Brazil). The DEM supports the modeling studies of sand-dune evolution using multi-temporal satellite images and ground truth data, obtained th...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-019-43735-0
更新日期：2019-05-15 00:00:00
abstract：:The oral cavity contains different types of microbial species that colonize human host via extensive cell-to-cell interactions and biofilm formation. Candida albicans-a yeast-like fungus that inhabits mucosal surfaces-is also a significant colonizer of subgingival sites in patients with chronic periodontitis. It is no...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-019-40771-8
更新日期：2019-03-13 00:00:00
abstract：:Resistant starch (RS) has been reported to reduce body fat in obese mice. However, this effect has not been demonstrated in humans. In this study, we tested the effects of RS in 19 volunteers with normal body weights. A randomized, double-blinded and crossover design clinical trial was conducted. The study subjects we...
journal_title：Scientific reports
pub_type： 杂志文章,随机对照试验
doi：10.1038/s41598-018-38216-9
更新日期：2019-03-20 00:00:00
abstract：:Somatic mutations of many cancer genes tend to co-occur (termed co-mutations) in certain patterns during tumor initiation and progression. However, the genetic and epigenetic mechanisms that contribute to the co-mutations of these cancer genes have yet to be explored. Here, we systematically investigated the associati...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep35270
更新日期：2016-10-20 00:00:00
abstract：:Plasmonics is a rapidly emerging platform for quantum state engineering with the potential for building ultra-compact and hybrid optoelectronic devices. Recent experiments have shown that despite the presence of decoherence and loss, photon statistics and entanglement can be preserved in single plasmonic systems. This...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/srep18313
更新日期：2015-12-16 00:00:00
abstract：:Increasing influence of Atlantic water in the Arctic Ocean has the potential to significantly impact regional water temperature and salinity. Here we use a rDNA barcoding approach to reveal how microbial communities are partitioned into distinct assemblages across a gradient of Atlantic-Polar Water influence in the No...
journal_title：Scientific reports
pub_type： 杂志文章
doi：10.1038/s41598-020-76293-x
更新日期：2020-11-06 00:00:00
