Enhanced dispersion and durability of Pt nanoparticles on a thiolated CNT support

Chen, Siguo; Wei, Zidong; Guo, Lin; Dong, Lichun; Shen, Pei Kang; Qi, Xueqiang; Li, Li

doi:10.1039/c1cc14261e

Cited by 76 publications

(55 citation statements)

References 15 publications

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“…[261][262][263][264][265] Wei et al found a strong interaction formed between Pt nanoparticles and thiolated carbon supports (Pt/SH-CNTs), resulting in markedly enhanced tolerance against Pt dissolution at high potentials. [261][262][263][264][265] Wei et al found a strong interaction formed between Pt nanoparticles and thiolated carbon supports (Pt/SH-CNTs), resulting in markedly enhanced tolerance against Pt dissolution at high potentials.…”

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confidence: 99%

Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction

2015

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Developing highly efficient catalysts for the oxygen reduction reaction (ORR) is key to the fabrication of commercially viable fuel cell devices and metal-air batteries for future energy applications. Herein, we review the most recent advances in the development of Pt-based and Pt-free materials in the field of fuel cell ORR catalysis. This review covers catalyst material selection, design, synthesis, and characterization, as well as the theoretical understanding of the catalysis process and mechanisms. The integration of these catalysts into fuel cell operations and the resulting performance/durability are also discussed. Finally, we provide insights into the remaining challenges and directions for future perspectives and research.

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Section: View Article Onlinementioning

confidence: 99%

Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction

2015

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“…For example, highly dispersed Pt nanoparticles supported on surface of thiolation functional carbon nanotubes, such as S-doped CNTs (SH-CNTs), CNTseC 6 H 6 eCH 2 eSH, CNTseCONHe(CH 2 ) 2 eSH, and CNTseCONHeC 6 H 6 eSH, were explored. 37,38 Furthermore, when some metal oxides such as NbTiO 2 and metal carbides were explored as the catalyst supports, strong interaction between catalyst and the support was also observed. 5,39…”

Section: Interaction Between Pt Catalysts and Supporting Materialsmentioning

confidence: 93%

Electrocatalysts and Catalyst Layers for Oxygen Reduction Reaction

Feng

Sun

Yao

et al. 2014

Rotating Electrode Methods and Oxygen Reduction Electrocatalysts

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“…研究表明, 该催化剂的活性是同等条件下商业催化剂的三倍, 同时其稳定性明显高于商业催化剂. Wei 和 Choi 等 [9,10] 在碳纳米管的骨架构型上引入巯基官能团, 并将其作为催化剂的载体. 测试结果表明: 巯基官能团的修饰使得催化剂在性能和稳定性上比商业催化剂有明显的提高.…”

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Preparation of Polyaniline Covalently Grafted Carbon Nanotubes Supported Pt Catalysts and Its Electrocatalytic Performance for Methanol

Chen¹,

Tong²,

Gao³

et al. 2013

Acta Chim. Sinica

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Recently, covalently functionalization carbon nanotubes have been received special attention because of the expansive application prospect in the areas of nanoscience and nanotechnology. Moreover, covalent functionalization of carbon nanotubes can readily deal with fundamental issues of purification, solubilization, and processing. In particular, polyaniline, due to its high electronic conductivity, good environmental stability, easy preparation and reversible acid-base doping-dedoping chemistry, has been one of the most studied conducting polymers. Recently, CNTs-PANI composites were investigated widely, such as supercapacitor, optoelectronic devices, sensing and catalysis as well. In this work, uniform structures PANI covalently grafted onto CNTs functionalization with -NH 2 groups composites have been obtained by using liquid/liquid(L/L) interfacial polymerization method. The interfacial system was established by using CNTs, FeCl 3 , HCl as top aqueous phase and aniline, CH 2 Cl 2 as bottom organic phase, which effective suppress second growth of PANI and obtain uniform CNTs-NH-PANI composites. Concerning CNTs-NH-PANI composites, PANI can covalently be grafted on CNTs with -NH 2 groups. The resulted CNTs-NH-PANI composites have abundant -NH 2 groups on their surface, serving as anchor centers for achieving high Pt dispersion. More important, PANI uniformly grafted on CNTs is prone to disperse the bundle of CNTs into separated lines and improve water dispersibility of obtained CNTs-NH-PANI composites. Subsequently, PtNPs were successfully deposited on the CNTs-PANI to form ternary hybrids. Potential application of the ternary hybrids as high performance catalysts for direct methanol fuel cells has been explored. The catalyst samples were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and electrochemical methods. TEM results showed that the hierarchical CNTs-PANI composites with uniform morphology have been successfully prepared due to hydrophilic -OH and -NH 2 groups covalently functionalized onto the surface of CNTs. Moreover, the electrochemical measurement show that the Pt/CNTs-NH-PANI hybrid have better stabilities compared with commercial JM (Pt/C) catalyst. The long-term durability test of the Pt/CNTs-CO-PANI, Pt/CNTs-NH-PANI and Pt/C catalysts shows that PANI grafted on CNTs as catalyst supports have better stabilities and more tolerant toward poisoning. Moreover, PANI covalently grafted on CNTs as catalyst supports has more excellent performance. The I f /I b of Pt/CNTs-NH-PANI catalyst for electrocatalytic methanol oxidation is 1.65 which is nearly 1.6 and 1.2 times than that of the commercial JM(Pt/C) and Pt/CNTs-CO-PANI catalysts, respectively. The results show that carbon nanotubes covalently grafting polyaniline as support can effectively improve the catalyst stability, increasing the service life of the catalyst.

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Enhanced dispersion and durability of Pt nanoparticles on a thiolated CNT support

Abstract: High dispersion Pt nanoparticles supported on surface thiolation functional carbon nanotubes (SH-CNTs) is presented and electrochemical measurements confirm that the Pt/SH-CNTs catalyst shows good durability and excellent ORR activity.

Cited by 76 publications

References 15 publications

Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction

Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction

Electrocatalysts and Catalyst Layers for Oxygen Reduction Reaction

Preparation of Polyaniline Covalently Grafted Carbon Nanotubes Supported Pt Catalysts and Its Electrocatalytic Performance for Methanol

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