Pt nanoparticles deposited over carbon nanotubes for selective hydrogenation of cinnamaldehyde

Ma, Hua; Wang, Licheng; Chen, Luyang; Dong, Chao; Yu, Wenxin; Huang, Tao; Qian, Yitai

doi:10.1016/j.catcom.2006.07.020

Cited by 118 publications

(72 citation statements)

References 20 publications

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“…So interaction of electronic states of the CNT support and the pyrolyzed ES takes place affecting the catalytic behavior of the N functionalities on the sidewall of the MWNTs. The effect of the MWNT structure in this interaction and activity is complicated as a number of parameters, such as MWNT diameter and chirality, determine its electronic density of states [61][62][63]. It is also noteworthy that the polymer wrapping in this synthesis method is applied for the pristine MWNT, instead of the mostly used acid treated tubes, and thus the oxygen content in the NMWNTs (Table S1) is much lower than that reported for other N-doped materials [33].…”

Section: Investigating the Catalytic Active Sites Of The Nmwnt Catalymentioning

confidence: 96%

Straightforward synthesis of nitrogen-doped carbon nanotubes as highly active bifunctional electrocatalysts for full water splitting

Davodi

Tavakkoli

Lahtinen

et al. 2017

Journal of Catalysis

110

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a b s t r a c tThe success of intermittent renewable energy systems relies on the development of energy storage technologies. Particularly, active and stable water splitting electrocatalysts operating in the same electrolyte are required to enhance the overall efficiency and reduce the costs. Here we report a precise and facile synthesis method to control nitrogen active sites for producing nitrogen doped multi-walled carbon nanotube (NMWNT) with high activity toward both oxygen and hydrogen evolution reactions (OER and HER). The NMWNT shows an extraordinary OER activity, superior to the most active non-metal based OER electrocatalysts. For OER, the NMWNT requires overpotentials of only 320 and 360 mV to deliver current densities of 10 and 50 mA cm À2 in 1.0 M NaOH, respectively. This metal-free electrocatalyst also exhibits a proper performance toward HER with a moderate overpotential of 340 mV to achieve a current density of 10 mA cm À2 in 0.1 M NaOH. This catalyst also shows high stability after long-time water oxidation without notable changes in the structure of the material. It is revealed that the electron-withdrawing pyridinic N moieties in the NMWNTs could serve as the active sites for OER and HER. Our findings open up new avenues for the development of metal-free electrocatalysts for full water splitting.

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Section: Investigating the Catalytic Active Sites Of The Nmwnt Catalymentioning

confidence: 96%

Straightforward synthesis of nitrogen-doped carbon nanotubes as highly active bifunctional electrocatalysts for full water splitting

Davodi

Tavakkoli

Lahtinen

et al. 2017

Journal of Catalysis

110

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“…Many studies concerning the opening, cutting, and filling of the CNTs synthesized using conventional synthesis method have been conducted [111][112][113][114][115]. A knotty problem is that foreign maters may deposit onto the outer surface of CNTs during the filling procedure by using either incipient wetness impregnation method or sublimation method [116,117].…”

Section: Filling Of Aao-cntsmentioning

confidence: 99%

Carbon nanotubes prepared by anodic aluminum oxide template method

et al. 2011

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One of the most unique structural characteristics of carbon nanotubes (CNTs) differentiating from other carbon materials is their hollow nanochannles, which can be utilized for encapsulating and loading foreign matters. The anodic aluminum oxide (AAO) template technique enables the diameter, length, and cap structure control of the replicated CNTs, and thus shows advantages in pore structure control over the traditional CNT growth approaches. This review details the synthesis of CNTs with tunable diameter, length, wall thickness, and crystalline by using the AAO template method. The doping of heteroatoms and filling of foreign matters into AAO-CNTs are also addressed. Moreover, the main challenges and developing trends of the AAO template method are discussed.carbon nanotubes (CNTs), anodic aluminum oxide (AAO) template method, controllability Citation:Hou P X, Liu C, Shi C, et al. Carbon nanotubes prepared by anodic aluminum oxide template method.

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“…They observed that in general the average metal particle size was smaller for CNF than for CNT. Two different CNT batches with different inner tube diameters (batch 1: \10 nm and batch 2: 60-100 nm) and different BET surface areas (batch 1: 400 m 2 /g and batch 2: 40 m 2 /g) were studied by Ma et al [9]. The authors deposited platinum on the supports, which resulted in two different metal particles sizes (batch 1:\2 nm and batch 2:[5 nm).…”

Section: Introductionmentioning

confidence: 99%

“…The authors deposited platinum on the supports, which resulted in two different metal particles sizes (batch 1:\2 nm and batch 2:[5 nm). These catalysts were tested for the cinnamaldehyde hydrogenation and large differences with respect to catalytic selectivity were found (selectivity to cinnamyl alcohol for batch 1: \25% and batch 2: [60%) [9].…”

Section: Introductionmentioning

confidence: 99%

Reducibility of Platinum Supported on Nanostructured Carbons

et al. 2009

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The nanostructure of graphite like carbon, i.e. carbon nanofibers (CNF), carbon nanotubes (CNT) and carbon nanoplatelets (CNP), displayed a significant influence on the reducibility of platinum deposited on these carbons. The onset temperature for reduction increased from 461 K for Pt/CNF to 466 K for Pt/CNP and 487 K for Pt/CNT. The retarded reduction for Pt/CNT was related to the higher amount of acidic oxygen surface groups on this support resulting in a strong stabilization of the cationic platinum species. A higher reduction temperature for that sample increased the amount of metallic platinum, however the platinum particle size was larger (2-11 nm) compared to that of Pt/CNF and Pt/CNP (both 1-3 nm). The orientation of the graphene sheets had a significant influence on the selectivity for cinnamaldehyde hydrogenation: Pt/CNP resulted in a higher selectivity towards cinnamyl alcohol compared to Pt/CNF.

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Pt nanoparticles deposited over carbon nanotubes for selective hydrogenation of cinnamaldehyde

Cited by 118 publications

References 20 publications

Straightforward synthesis of nitrogen-doped carbon nanotubes as highly active bifunctional electrocatalysts for full water splitting

Straightforward synthesis of nitrogen-doped carbon nanotubes as highly active bifunctional electrocatalysts for full water splitting

Carbon nanotubes prepared by anodic aluminum oxide template method

Reducibility of Platinum Supported on Nanostructured Carbons

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