Highly selective production of heavy hydrocarbons over cobalt–graphene–silica nanocomposite catalysts

Huang, Jian; Qian, Weixin; Ma, Hongfang; Zhang, Haitao; Ying, Weiyong

doi:10.1039/c7ra05887j

Cited by 44 publications

(24 citation statements)

References 48 publications

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“…3(d) shows the deconvoluted spectrum of Co 2p for Pd 3 Co/NG. The two intense peaks at 780.11 eV and 794.73 eV correspond to the Co 2p 3/2 and Co 2p 1/2 respectively 37 – 39 . A shake-up satellite peak at 788.76 eV indicates the presence of Co 3 O 4 which is denoted as Sat 40 .…”

Section: Resultsmentioning

confidence: 99%

High-performance Platinum-free oxygen reduction reaction and hydrogen oxidation reaction catalyst in polymer electrolyte membrane fuel cell

Chandran

Ghosh

Ramaprabhu

2018

Sci Rep

102

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The integration of polymer electrolyte membrane fuel cell (PEMFC) stack into vehicles necessitates the replacement of high-priced platinum (Pt)-based electrocatalyst, which contributes to about 45% of the cost of the stack. The implementation of high-performance and durable Pt metal-free catalyst for both oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR) could significantly enable large-scale commercialization of fuel cell–powered vehicles. Towards this goal, a simple, scalable, single-step synthesis method was adopted to develop palladium-cobalt alloy supported on nitrogen-doped reduced graphene oxide (Pd3Co/NG) nanocomposite. Rotating ring-disk electrode (RRDE) studies for the electrochemical activity towards ORR indicates that ORR proceeds via nearly four-electron mechanism. Besides, the mass activity of Pd3Co/NG shows an enhancement of 1.6 times compared to that of Pd/NG. The full fuel cell measurements were carried out using Pd3Co/NG at the anode, cathode in conjunction with Pt/C and simultaneously at both anode and cathode. A maximum power density of 68 mW/cm2 is accomplished from the simultaneous use of Pd3Co/NG as both anode and cathode electrocatalyst with individual loading of 0.5 mg/cm2 at 60 °C without any backpressure. To the best of our knowledge, the present study is the first of its kind of a fully non-Pt based PEM full cell.

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Section: Resultsmentioning

confidence: 99%

High-performance Platinum-free oxygen reduction reaction and hydrogen oxidation reaction catalyst in polymer electrolyte membrane fuel cell

Chandran

Ghosh

Ramaprabhu

2018

Sci Rep

102

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show abstract

“…To date, reports detailing the use of graphene and graphene derivatives in the FTS industry are limited in number 6,7,11,19,21,24,25,[56][57][58][59][60] and more systematic and detailed studies are required to give a clearer role of these materials in the FTS reaction. Some of the published works used graphene as a support for Fe NPs, 6,7,11,19,24,[56][57][58] while others utilized Co catalyst systems.…”

Section: Fts Sbr Performance Evaluationmentioning

confidence: 99%

“…Some of the published works used graphene as a support for Fe NPs, 6,7,11,19,24,[56][57][58] while others utilized Co catalyst systems. 21,25,59,60 Cheng et al 6,7 aimed at improving light olen selectivities by using Mg and K promoters. They also provided a comparison between the alkaline earth metal promoters.…”

Section: Fts Sbr Performance Evaluationmentioning

confidence: 99%

Mn–Fe nanoparticles on a reduced graphene oxide catalyst for enhanced olefin production from syngas in a slurry reactor

et al. 2018

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“…x 10 -3 s -1 at 320 o C. These TOF values are compared with those in literature as shown in Figure 4a. 18,24,[47][48][49][50][51][52] It can be seen that the TOFs vary in a wide range in the popularly studied temperature range of 200 -220 o C.…”

Section: Ft Catalysis Of the Core/shell Cobalt Nanoparticlesmentioning

confidence: 99%

Ethyne-Reducing Metal–Organic Frameworks to Control Fabrications of Core/shell Nanoparticles as Catalysts

Zhang

Guo²,

Yuan

et al. 2018

ACS Catal.

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An approach using cobalt metal-organic frameworks (Co-MOF) as precursors is established for the fabrication of cobalt nanoparticles in porous carbon shells (core/shell Co@C). Ethyne deposition is used for controlling the reduction of cobalt nanoclusters in the MOF and the spontaneous formation of the porous carbon shells. The metallic cobalt cores formed are up to 4-6 nm with the crystal phase varying between hexagonally-closepacked (hcp) and face-centre-packed (fcc). The porous carbon shells changes from amorphous to graphene with the ethyne deposition temperature increasing from 400 to 600 o C. The core/shell Co@C nanoparticles exhibit high catalytic activity in selectively converting syngas (CTY: 254.1-312.1 μmolCOꞏgCo-1 ꞏs-1) into hydrocarbons (4.0-5.2 gHCꞏg-cat-1 ꞏh-1) at 260 o C. As well as the crystal size and phase, the coordination numbers of the cobalt to oxygen and to other cobalt atoms on the surface of the cobalt nanoparticles, and the permeability of the porous carbon shell have been related to the catalytic performance in FTS reactions.

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Highly selective production of heavy hydrocarbons over cobalt–graphene–silica nanocomposite catalysts

Abstract: Cobalt–graphene–silica nanocomposites catalysts were applied in FTS and showed highly selective production of heavy hydrocarbons.

Cited by 44 publications

References 48 publications

High-performance Platinum-free oxygen reduction reaction and hydrogen oxidation reaction catalyst in polymer electrolyte membrane fuel cell

High-performance Platinum-free oxygen reduction reaction and hydrogen oxidation reaction catalyst in polymer electrolyte membrane fuel cell

Mn–Fe nanoparticles on a reduced graphene oxide catalyst for enhanced olefin production from syngas in a slurry reactor

Ethyne-Reducing Metal–Organic Frameworks to Control Fabrications of Core/shell Nanoparticles as Catalysts

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