Enhanced-electrocatalytic activity of Pt nanoparticles supported on nitrogen-doped carbon for the oxygen reduction reaction

Zhang, Shiming; Chen, Shengli

doi:10.1016/j.jpowsour.2013.03.149

Cited by 49 publications

(29 citation statements)

References 37 publications

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“…In situ doping requires the use of nitrogen precursor for the desired speciesand carbon prepared through the template method, [13,14] chemical vapor deposition, [15,16] and electrospinning, [17][18][19][20][21] whereas ex situ doping requires the incorporationo fn itrogen dopant into an undoped carbonm atrix such as through plasma coating [22] or thermalp rocessing in ammonia or N 2 . [23] However,t hese methods need complex procedures and poisonous chemicals, which results in extremely low yields and limitation towards the commercial application of heteroatom-doped carbon materials. If the method includes pyrolysis, it is difficult to control the concentrationo fNspecies owing to evacuation of the Na tom from the carbon lattice at high temperature.…”

Section: Introductionmentioning

confidence: 99%

The Role of Lone‐Pair Electrons in Pt–N Interactions for the Oxygen Reduction Reaction in Polymer Exchange Membrane Fuel Cells

2020

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An N‐doped carbon with various N concentrations was prepared by using a scalable ball‐milling method. The importance of the lone pair of electrons on the N species for the stability of Pt nanoparticles and their activity toward the oxygen reduction reaction was investigated. X‐ray spectroscopic analysis was used to investigate the interaction between Pt and the pyridinic N. The pyridinic N modified the Pt oxidation state and helped achieve size homogeneity and high catalytic activity by facilitating the rate‐determining step.

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Section: Introductionmentioning

confidence: 99%

The Role of Lone‐Pair Electrons in Pt–N Interactions for the Oxygen Reduction Reaction in Polymer Exchange Membrane Fuel Cells

2020

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“…Three forms of nitrogen atom, namely graphitic N (401.2 AE 0.2 eV), pyrrolic N (400.1 AE 0.2 eV) and pyridinic N (398.1 AE 0.2 eV) were observed. [27][28][29][30][31] Nitrogen dopants are generally believed to be efficient anchoring sites for stabilizing metal nanoparticles via donating electrons. In the present work, the enhanced interaction between the carbon support and Pt species were well reected by the excellent dispersion of Pt nanoparticles on the surface of GCCP, especially on the surface of tethered graphene sheets (Fig.…”

Section: Resultsmentioning

confidence: 99%

Converting waste paper to multifunctional graphene-decorated carbon paper: from trash to treasure

Feng

Zhang

et al. 2015

J. Mater. Chem. A

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Proper disposal of waste paper is an important waste-management concern. We developed a facile and inexpensive method to transform waste paper into graphene-tethered carbon fiber composite paper (GCCP). Urea was the only additive for the carbonization of the GCCP. The as-obtained GCCP exhibited high electrical conductivity, and GCCP/polydimethyl siloxane (GCCP/PDMS) composites showed good stretchability with great electromechanical stability. The surface of the GCCP membrane was observed to be superhydrophobic; this property apparently endowed the membrane with the ability to separate oil from water in our experiments, which makes GCCP a promising candidate material for cleanup of oil spills. The hierarchical structure, N doping feature and low decoration with Pt make GCCP a potential electrocatalyst for oxygen reduction, oxygen evolution and hydrogen evolution reactions with superior activity and high stability, and hence also a promising candidate for application as a direct working electrode in future energy systems.

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“…Therefore, the enhancement of ORR activities of Pt/B-ECP600 is considered to be due to the electronic effect of B-ECP600 on the Pt-O and Pt-OH chemical bonding, which is implemented by the electron-deficient boron oxide dominating electron transfer [28]. On the other hand, the spillover effect [34] may also have played an important role in improving ORR performance of Pt/B-ECP600: Due to the oxyphilicity of boron dopant on B-ECP600 supports [12], a part of adsorbed oxygen atoms dissociated from O 2 molecules on Pt may be transferred to the adjacent B atoms and further reduced to H 2 O. The analyses above suggest that the B-ECP600 has a synergetic coupling effect in the ORR electrocatalysis, and in some way, boron on B-ECP600 has taken part in the ORR and thus increased the overall ORR performance, as shown in Scheme 2.…”

Section: Electrochemical Properties Of Pt/b-ecp600mentioning

confidence: 99%

Improved Electrocatalytic Activity and Durability of Pt Nanoparticles Supported on Boron-Doped Carbon Black

Yao

et al. 2020

Catalysts

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A facile strategy is proposed to synthesize boron-doped ECP600 carbon black (B-ECP600), and the catalyst of Pt supported on boron-doped ECP600 (Pt/B-ECP600) shows smaller particle sizes and a higher electrochemical surface area (95.62 m2·gPt−1) and oxygen reduction reaction activity (0.286 A·mgPt−1 for mass activity; 0.299 mA·cm−2 for area specific activity) compared to the catalyst of Pt supported on ECP600 (Pt/ECP600). The results show that the boron doping of the carbon supports plays an important role in controlling the size and dispersion of Pt nanoparticles and the O2 adsorption/dissociation of the oxygen reduction reaction. A further accelerated durability test proves that boron doping can greatly enhance the stability of carbon support and thus improves the electrochemical performance of the catalyst during the long-time running. All these results suggest boron-doped carbon has great potential for application in fuel cells.

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Enhanced-electrocatalytic activity of Pt nanoparticles supported on nitrogen-doped carbon for the oxygen reduction reaction

Cited by 49 publications

References 37 publications

The Role of Lone‐Pair Electrons in Pt–N Interactions for the Oxygen Reduction Reaction in Polymer Exchange Membrane Fuel Cells

The Role of Lone‐Pair Electrons in Pt–N Interactions for the Oxygen Reduction Reaction in Polymer Exchange Membrane Fuel Cells

Converting waste paper to multifunctional graphene-decorated carbon paper: from trash to treasure

Improved Electrocatalytic Activity and Durability of Pt Nanoparticles Supported on Boron-Doped Carbon Black

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