N-doped carbon@Ni–Al2O3 nanosheet array@graphene oxide composite as an electrocatalyst for hydrogen evolution reaction in alkaline medium

Wang, Juan; Qiu, Tian; Xu, Chen; Lu, Yanluo; Yang, Wensheng

doi:10.1016/j.jpowsour.2015.05.080

Cited by 54 publications

(22 citation statements)

References 37 publications

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“…S3) shows that the LDH layers have been transformed into Co 9 S 8 (JCPDS 65-1765), Co (JCPDS 15-0806) and amorphous alumina. 23,25 SEM images of cLDH-900 ( Fig. 1c and Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the three-dimention (3D) gradient porous interconnected network surfaces can trap a continuous and stable gas film around their interface in an aqueous medium, which can provide effective channels for gas directional transportation without using external energy supplies or additional chemicals. [20][21][22][23] Besides, the hierarchical pore structure can improve the mass transport of ORR-relevant species (H + , OH -, H 2 O, etc.) during the ORR process, which enables a rapid and sustainable reaction.…”

Section: Introductionmentioning

confidence: 99%

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Monodisperse cobalt sulfides embedded within nitrogen-doped carbon nanoflakes: an efficient and stable electrocatalyst for the oxygen reduction reaction

Wang

Chen

et al. 2016

J. Mater. Chem. A

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Unique hollow hybrid structures composed of well-dispersed catalyst nanoparticles embedded in a carbon matrix offer great advantages for constructing advanced supported catalysts. Herein, we report the designed synthesis of Co9S8 and nitrogen doped hollow carbon sphere (Co9S8/NHCS) composites by carbonization of metanilic anions within the confinement of the two-dimensional galleries of hollow spherical cobalt-aluminum layered double hydroxides. The Co9S8/NHCS are composed of numerous porous carbon nanoflakes, and monodisperse Co9S8 nanoparticles are embedded within the carbon nanoflakes. Electrochemical measurements show the Co9S8/NHCS catalysts prepared at 900 °C exhibit superior oxygen reduction reaction (ORR) activity, resulting in the highest ORR performance to date among all transition metal sulfide-based ORR catalysts in both alkaline and acid electrolytes. This interlayer confined reaction approach may provide an efficient platform for the synthesis of other functional materials for alternative applications.Monodisperse Co 9 S 8 nanoparticles embedded within nitrogen-doped porous carbon nanoflakes are synthesized by an interlayer confined reaction and exhibit excellent oxygen reduction reaction activity.

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“…S3) shows that the LDH layers have been transformed into Co 9 S 8 (JCPDS 65-1765), Co (JCPDS 15-0806) and amorphous alumina. 23,25 SEM images of cLDH-900 ( Fig. 1c and Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Monodisperse cobalt sulfides embedded within nitrogen-doped carbon nanoflakes: an efficient and stable electrocatalyst for the oxygen reduction reaction

Wang

Chen

et al. 2016

J. Mater. Chem. A

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“…随着"碳经济"向"氢经济"的转变, 如何高效利用电化学的方法从水中获取H2, 越来越受到关注. 杨文胜课题组 [59] 将NiAl-LDH与石墨烯复合, 并在其表面包 [58] (网络版彩图) 图 9 不同催化剂的HER性能评价(a)和Tafel曲线(b) [59] [60] (网络版彩图) 图 11 (a) LDH-CNT-G催化剂的制备示意图; (b) 电催化氧化葡萄糖性能评价 [61] mmol/(g h). 2015年, 本课题组 [63] 将ZnCr-LDH与石墨烯纳米材料复合制备ZnCr-LDH/石墨烯复合光催化剂, 该催化剂在可见光下对染料分子罗丹明B具有极高的光催化降解能力, 这主要得益于可见光条件下ZnCr-LDH 八面体结构中Cr 3+ 离子的Cr-3dt2g向Cr-3deg轨道的转变, 以及石墨烯强的电子传导能力.…”

Section: 基于石墨烯的复合催化材料unclassified

Recent advances in catalytic properties of LDHs/carbon composite materials

Zhao¹,

Fan²,

Li³

2017

Sci. Sin.-Chim

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Survey of recent advances of in the field of π-conjugated heterocyclic azomethines as materials with tuneable properties SCIENCE CHINA Chemistry 56, 3 (2013); Preparation and photochromic properties of NiAl-NO 3-LDHs/LDPE composite Chinese Science Bulletin 52, 877 (2007); Plasma-chemical modification of carbon fibers as an efficient method of regulating properties of PTFE-based composite materials Science in China Series A-Mathematics 44, 292 (2001); Recent advances and challenges of stretchable supercapacitors based on carbon materials SCIENCE CHINA Materials 59, 475 (2016);

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“…Pt is widely applied as an anode catalyst for PEM fuel cells as it exhibits the best electrocatalytic activity among monometallic catalysts; however, despite its unique and high electrocatalytic activity towards hydrogen, the large-scale application, and commercialization of Pt-containing devices is hindered by its high cost, scarcity, and below 60% peak efficiency. [8][9][10][11][12] 3D structured catalysts in particular benefit from a larger surface area, fast transportation of the reactants to the electroactive surface area, and high electrical conductivity. The development of an anode catalyst with performance comparable to that of Pt could reduce the cost of PEMs fuel cells tremendously.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6] Therefore, substantial efforts have been made to reduce the usage of Pt in PEM fuel cells. 8,10 In this context, nanostructured catalysts such as nanocubes, nanosheets, nanowires, nanoneedles, and nanoflowers have been reported. 7,8 In particular, three-dimensional (3D) structured composites, nanoparticles, and alloys of various non-Pt catalysts, including Mo S 2 , Co Se 2 , W 2 C, Ni Co, Fe P, Ni Mo, Ni Sn, Ni Cu, Ni Al 2 O 3 , and Ni CeO 2 , have shown good activity in the hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) at relatively low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Nanoneedle‐structured Anode Catalyst for Low‐Temperature Proton Exchange Membrane Fuel Cells

Basumatary

Konwar

Yoon

2019

Bulletin Korean Chem Soc

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A new state-of-the-art NiMnCo anode co-catalyst has been prepared and investigated with the aim of reducing dependence on expensive Pt catalysts in hydrogen-based fuel cells. The as-prepared co-catalyst exhibited a three dimensional (3D) nanoneedle structure, which was observed using transmission electron microscopy. Pt nanoparticles (approximately 10 wt %) were deposited on the surface of the 3D NiMnCo nanoneedles to further increase their electrocatalytic activity, and the performance of membrane-electrodeassemblies based on the Pt@NiMnCo and NiMnCo anode catalysts was evaluated. The peak power densities of the Pt@NiMnCo-and NiMnCo-based fuel cells were found to be 352.64 and 299.78 mW/cm 2 , respectively, at 80 C. Furthermore, the Pt@NiMnCo nanoneedle catalyst exhibited a power density slightly lower than that of a commercial Pt/C (40 wt% Pt) catalyst at 60 C. Thus, the NiMnCo nanoneedle co-catalyst could reduce the dependence of proton exchange membrane fuel cells on Pt catalysts.

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N-doped carbon@Ni–Al2O3 nanosheet array@graphene oxide composite as an electrocatalyst for hydrogen evolution reaction in alkaline medium

Cited by 54 publications

References 37 publications

Monodisperse cobalt sulfides embedded within nitrogen-doped carbon nanoflakes: an efficient and stable electrocatalyst for the oxygen reduction reaction

Monodisperse cobalt sulfides embedded within nitrogen-doped carbon nanoflakes: an efficient and stable electrocatalyst for the oxygen reduction reaction

Recent advances in catalytic properties of LDHs/carbon composite materials

Nanoneedle‐structured Anode Catalyst for Low‐Temperature Proton Exchange Membrane Fuel Cells

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