Hierarchical spheres constructed by defect-rich MoS 2 /carbon nanosheets for efficient electrocatalytic hydrogen evolution

Yang, Linjing; Zhou, Weijia; Lu, Jia; Hou, Dongman; Ke, Yunting; Li, Guoqiang; Tang, Zhenghua; Kang, Xiongwu; Chen, Shaowei

doi:10.1016/j.nanoen.2016.02.056

Cited by 273 publications

(145 citation statements)

References 44 publications

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“…With a suitable size, QDs can serve as ideal fluorescent markers for detection of multiple miRNA biomarker combinations with a high quantum yield and wide excitation range . In multivariate analysis, the narrow and symmetric emission spectra of QDs were shown to minimize overlapping fluorescence emission . Graphene is the most commonly used QD material, and GQDs have been widely used in the detection field with increasingly extensive attention focused on miRNA detection.…”

Section: State‐of‐the‐art Protocols For High‐quality Mirna Detectionmentioning

confidence: 99%

Progress in miRNA Detection Using Graphene Material–Based Biosensors

Zhang

Miao

Sun

et al. 2019

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MicroRNAs (miRNAs) are short, endogenous, noncoding RNAs that play critical roles in physiologic and pathologic processes and are vital biomarkers for several disease diagnostics and therapeutics. Therefore, rapid, low‐cost, sensitive, and selective detection of miRNAs is of paramount importance and has aroused increasing attention in the field of medical research. Among the various reported miRNA sensors, devices based on graphene and its derivatives, which form functional supramolecular nanoassemblies of π‐conjugated molecules, have been revealed to have great potential due to their extraordinary electrical, chemical, optical, mechanical, and structural properties. This Review critically and comprehensively summarizes the recent progress in miRNA detection based on graphene and its derivative materials, with an emphasis on i) the underlying working principles of these types of sensors, and the unique roles and advantages of graphene materials; ii) state‐of‐the‐art protocols recently developed for high‐performance miRNA sensing, including representative examples; and iii) perspectives and current challenges for graphene sensors. This Review intends to provide readers with a deep understanding of the design and future of miRNA detection devices.

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Section: State‐of‐the‐art Protocols For High‐quality Mirna Detectionmentioning

confidence: 99%

Progress in miRNA Detection Using Graphene Material–Based Biosensors

Zhang

Miao

Sun

et al. 2019

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“…Besides graphene and CNT,v arious carbon materials, such as carbon fibers, [24] carbon cloth, [25] carbon spheres [65] and so on, were introduced to enhance the catalytic activities of MoS 2 . Zhu et al [24] reported the synthesis of MoS 2 nanosheets on 1D conductive carbon nanofibers (CNFs)f rom MoO 3 and and sulfer vapor by the CVD method ( Figure 4a).…”

Section: Molybdenum Disulfide (Mos 2 )mentioning

confidence: 99%

“…The unique layer orientation of MoS 2 /CC provides expanded active edge sites as well as ac onstant workinge lectrode area with the removal of the as-made H 2 bubbles from the surface of the nanoporous electrode. Yang et al [65] fabricated MoS 2 / carbon spheres with many active sites using af acile microemulsion procedure (Figure 4c). Liu et al [66] proposed an ovel strategy for the synthesis of hierarchical MoS 2 /carbon nanocomposites using ap olysaccharide matrix.…”

Section: Molybdenum Disulfide (Mos 2 )mentioning

confidence: 99%

Molybdenum‐Based Carbon Hybrid Materials to Enhance the Hydrogen Evolution Reaction

Bae

Jeon

Mahmood

et al. 2018

Chemistry A European J

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Hydrogen is considered af uture energy carrier that could improve energy storageo fi ntermittent solar/ wind power to solve energy and environmental problems. Based on such demand, development of electrocatalysts for hydrogen generation has been actively pursued. Although Pt is the most efficient catalyst for the hydrogen evolution reaction (HER), it hasl imits for widespread application, mainly its low abundance and high cost. Thus, developing an efficient catalyst from non-preciousm etals that are abun-dant and inexpensive remains an important challenge to replacemento fP t. Transition metals have been considered possible candidatest or eplace Pt-based catalysts. In this review,a mong the transition metals, we focus on recently developedm olybdenum-carbon( Mo-C)h ybrid materials as electrocatalysts for HER. In particular,t he synthesis strategy for Mo-C hybrid electrocatalysts and the role of various carbon nanocomposites in Mo-C hybrid systems are highlighted.[a] Dr.

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“…Unfortunately, the formation of the basal plane is thermodynamically favorable limiting the number and catalytic capability of active sites. Therefore, there is an urgent need for optimization by efficient strategies (e.g., chemical strain, defect engineering, heteroatomic doping, heterojuction, etc), in order to activate and modulate the electronic states of catalysts. For a catalyst with relatively inert surfaces, the activation and optimization can be concurrently achieved, leading to much enhanced performance and extension in applications.…”

Section: Introductionmentioning

confidence: 99%

Twinned Tungsten Carbonitride Nanocrystals Boost Hydrogen Evolution Activity and Stability

Kou

Wang

et al. 2019

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Synergistic integration of two active metal‐based compounds can lead to much higher electrocatalytic activity than either of the two individually, due to the interfacial effects. Herein, a proof‐of‐concept strategy is creatively developed for the successful fabrication of twinned tungsten carbonitride (WCN) nanocrystals, where W2C and WN are chemically bonded at the molecule level. High‐angle annular dark‐field scanning transmission electron microscopy (HAADF‐STEM) and X‐ray absorption fine structure (XAFS) spectroscopy analyses demonstrate that the intergrowth of W2C and WN in the WCN nanocrystals produces abundant N–W–C interfaces, leading to a significant enhancement in catalytic activity and stability for hydrogen evolution reaction (HER). Indeed, it shows 14.2 times higher and 140 mV lower in the respective turn‐over frequency (TOF) and overpotential at 10 mA cm−2 compared to W2C alone. To complement the experimental observation, the theoretical calculations demonstrate that the WCN endows more favorable hydrogen evolution reaction than the single W2C or WN crystals due to abundant interfaces, beneficial electronic states, lower work function, and more active W sites at the N–W–C interfaces.

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Hierarchical spheres constructed by defect-rich MoS 2 /carbon nanosheets for efficient electrocatalytic hydrogen evolution

Cited by 273 publications

References 44 publications

Progress in miRNA Detection Using Graphene Material–Based Biosensors

Progress in miRNA Detection Using Graphene Material–Based Biosensors

Molybdenum‐Based Carbon Hybrid Materials to Enhance the Hydrogen Evolution Reaction

Twinned Tungsten Carbonitride Nanocrystals Boost Hydrogen Evolution Activity and Stability

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