One step synthesis of chlorine-free Pt/Nitrogen-doped graphene composite for oxygen reduction reaction

Varga, Tamás; Varga, Ágnes; Ballai, Gergő; Haspel, Henrik; Kukovecz, Ákos

doi:10.1016/j.carbon.2018.03.020

Cited by 26 publications

(3 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pt nanoparticles loaded on BNCNF show well-dispersed anchorage on the herringbone network of carbon nanofibers, which is facilitated by surface defects on the support. Importantly, more than 95% Pt nanoparticles were 2–3 nm in diameter considered ideal for ORR . Similarly, TEM images of Pt/BNGS show uniform loading of Pt nanoparticles of average diameter ∼ 3.0 nm that dispersed well on the crumpled graphene sheets.…”

Section: Resultsmentioning

confidence: 92%

“…Importantly, more than 95% Pt nanoparticles were 2−3 nm in diameter considered ideal for ORR. 37 Similarly, TEM images of Pt/BNGS show uniform loading of Pt nanoparticles of average diameter ∼ 3.0 nm that dispersed well on the crumpled graphene sheets. Element mappings of Pt/BNCNF and Pt/BNGS show boron, carbon, nitrogen, and platinum were homogeneously distributed on carbon nanofibers and graphene sheets.…”

Section: ■ Results and Discussionmentioning

confidence: 93%

See 1 more Smart Citation

Self-Assembled Nanofiber Networks of Well-Separated B and N Codoped Carbon as Pt Supports for Highly Efficient and Stable Oxygen Reduction Electrocatalysis

Zhu

Wei

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

We report a facile synthesis strategy that achieves two goals of carbon support design for oxygen reduction catalysis: (1) self-assembly of hierarchical porous structure, with (2) well-separated nitrogen and boron codoping. The B and N codoped carbon nanofibers (BNCNF) grow directly on a cobalt foil catalyst via a “dissolution–diffusion–precipitation” mechanism using tert-butylamine borane as the source of boron, nitrogen, and carbon. The process releases gaseous boron and nitrogen at different temperatures and times, which greatly inhibits the formation of disadvantageous B–N bonds in the support. BNCNF has hierarchical porosity, large surface area, good structural stability, abundant reaction active sites, and facilitates highly dispersed distribution of platinum nanoparticles. Owing to strong interactions and multiple synergistic effects, Pt/BNCNF has increased oxygen reduction activity and durability in HClO4 solution over that of commercial Pt/C. Pt/BNCNF facilitates a Pt mass activity of 355.4 mA mg–1 (approximate 3.5 times larger than Pt/C) at 0.9 V vs RHE. Furthermore, Pt/BNCNF has better stability and maintains 90.4% of its initial mass activity after 5000 potential cycling tests, which is remarkably higher than that of Pt/C at 50.6%.

show abstract

Section: Resultsmentioning

confidence: 92%

Section: ■ Results and Discussionmentioning

confidence: 93%

Self-Assembled Nanofiber Networks of Well-Separated B and N Codoped Carbon as Pt Supports for Highly Efficient and Stable Oxygen Reduction Electrocatalysis

Zhu

Wei

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Carbon supports − have frequently been used to support Pt and exhibit excellent electrocatalytic ORR performances. Among the carbon supports studied, one-dimensional (1D) carbon nanotubes/nanowires/nanofibers − and two-dimensional (2D) graphene/carbon nanosheets − were preferred due to their higher specific surface area. However, the agglomeration stemming from Pt NPs anchored on carbon supports occurs due to aggregation from the stacking of supports with each other, resulting in a significant reduction in ORR activity and durability.…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid-Derived Ultrafine Pt Nanoparticles with a Uniformly Dispersed State for Long-Life Oxygen Electroreduction

Song

Wang

2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Ultrafine Pt nanoparticles (NPs) homogeneously anchored on hollow carbon nanoshells (PtIL-HCNs) via a wet-chemistry reduction of a new type of imidazolium-[PtCl6]2– ionic liquid (IL) are reported. Confined [PtCl6]2– in IL molecules effectively prevents the growth and spontaneous aggregation of the Pt NPs due to the electrochemical neutrality of the IL, resulting in a homogeneously dispersed state of Pt NPs. The PtIL-HCNs with a Pt loading of 22 wt % outperform the commercial Pt/C (40 wt %) in terms of oxygen reduction reaction (ORR) activity and durability. The half-wave potential of PtIL-HCNs is 51 mV more positive than that of the commercial Pt/C in 0.1 M HClO4. An electrochemical surface area of 97 m2 mg–1 Pt and specific mass activity of 475 mA mg–1 Pt of PtIL-HCNs were found to be 5.6 and 2.7 times higher than those on the commercial Pt/C. Furthermore, this work demonstrates that unlike one-dimensional (1D) carbon nanotubes and two-dimensional (2D) reduced oxide graphene, the three-dimensional (3D) HCN support plays an indispensable role in preventing any stacking of Pt NPs, leading to significantly enhanced ORR activity and durability.

show abstract

The study of the pyrolysis products of Ni (II) and Pd (II) chelate complexes as catalysts for the oxygen electroreduction reaction

Беленов

Гутерман

Попов

et al. 2020

J Solid State Electrochem

View full text Add to dashboard Cite

One step synthesis of chlorine-free Pt/Nitrogen-doped graphene composite for oxygen reduction reaction

Cited by 26 publications

References 74 publications

Self-Assembled Nanofiber Networks of Well-Separated B and N Codoped Carbon as Pt Supports for Highly Efficient and Stable Oxygen Reduction Electrocatalysis

Self-Assembled Nanofiber Networks of Well-Separated B and N Codoped Carbon as Pt Supports for Highly Efficient and Stable Oxygen Reduction Electrocatalysis

Ionic Liquid-Derived Ultrafine Pt Nanoparticles with a Uniformly Dispersed State for Long-Life Oxygen Electroreduction

The study of the pyrolysis products of Ni (II) and Pd (II) chelate complexes as catalysts for the oxygen electroreduction reaction

Contact Info

Product

Resources

About