Abstract
The development of electrocatalysts is crucial for renewable energy applications. Metal-doped graphene hybrid materials have been explored for this purpose, however, with much focus on noble metals, which are limited by their low availability and high costs. Transition metals may serve as promising alternatives. Here, transition metal-doped graphene hybrids were synthesized by a simple and scalable method. Metal-doped graphite oxide precursors were thermally exfoliated in either hydrogen or nitrogen atmosphere; by changing exfoliation atmospheres from inert to reductive, we produced materials with different degrees of oxidation. Effects of the presence of metal nanoparticles and exfoliation atmosphere on the morphology and electrocatalytic activity of the hybrid materials were investigated using electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and cyclic voltammetry. Doping of graphene with transition metal nanoparticles of the 4th period significantly influenced the electrocatalysis of compounds important in energy production and storage applications, with hybrid materials exfoliated in nitrogen atmosphere displaying superior performance over those exfoliated in hydrogen atmosphere. Moreover, nickel-doped graphene hybrids displayed outstanding electrocatalytic activities towards reduction of O 2 when compared to bare graphenes. These findings may be exploited in the research field of renewable energy.
| Original language | English |
|---|---|
| Pages (from-to) | 1295-1300 |
| Number of pages | 6 |
| Journal | Chemistry - An Asian Journal |
| Volume | 8 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2013 Jun 1 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Biochemistry
- Organic Chemistry
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Transition metal (Mn, Fe, Co, Ni)-doped graphene hybrids for electrocatalysis. / Toh, Rou Jun; Poh, Hwee Ling; Sofer, Zdeněk; Pumera, Martin.
In: Chemistry - An Asian Journal, Vol. 8, No. 6, 01.06.2013, p. 1295-1300.Research output: Contribution to journal › Article
TY - JOUR
T1 - Transition metal (Mn, Fe, Co, Ni)-doped graphene hybrids for electrocatalysis
AU - Toh, Rou Jun
AU - Poh, Hwee Ling
AU - Sofer, Zdeněk
AU - Pumera, Martin
PY - 2013/6/1
Y1 - 2013/6/1
N2 - The development of electrocatalysts is crucial for renewable energy applications. Metal-doped graphene hybrid materials have been explored for this purpose, however, with much focus on noble metals, which are limited by their low availability and high costs. Transition metals may serve as promising alternatives. Here, transition metal-doped graphene hybrids were synthesized by a simple and scalable method. Metal-doped graphite oxide precursors were thermally exfoliated in either hydrogen or nitrogen atmosphere; by changing exfoliation atmospheres from inert to reductive, we produced materials with different degrees of oxidation. Effects of the presence of metal nanoparticles and exfoliation atmosphere on the morphology and electrocatalytic activity of the hybrid materials were investigated using electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and cyclic voltammetry. Doping of graphene with transition metal nanoparticles of the 4th period significantly influenced the electrocatalysis of compounds important in energy production and storage applications, with hybrid materials exfoliated in nitrogen atmosphere displaying superior performance over those exfoliated in hydrogen atmosphere. Moreover, nickel-doped graphene hybrids displayed outstanding electrocatalytic activities towards reduction of O 2 when compared to bare graphenes. These findings may be exploited in the research field of renewable energy.
AB - The development of electrocatalysts is crucial for renewable energy applications. Metal-doped graphene hybrid materials have been explored for this purpose, however, with much focus on noble metals, which are limited by their low availability and high costs. Transition metals may serve as promising alternatives. Here, transition metal-doped graphene hybrids were synthesized by a simple and scalable method. Metal-doped graphite oxide precursors were thermally exfoliated in either hydrogen or nitrogen atmosphere; by changing exfoliation atmospheres from inert to reductive, we produced materials with different degrees of oxidation. Effects of the presence of metal nanoparticles and exfoliation atmosphere on the morphology and electrocatalytic activity of the hybrid materials were investigated using electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and cyclic voltammetry. Doping of graphene with transition metal nanoparticles of the 4th period significantly influenced the electrocatalysis of compounds important in energy production and storage applications, with hybrid materials exfoliated in nitrogen atmosphere displaying superior performance over those exfoliated in hydrogen atmosphere. Moreover, nickel-doped graphene hybrids displayed outstanding electrocatalytic activities towards reduction of O 2 when compared to bare graphenes. These findings may be exploited in the research field of renewable energy.
UR - http://www.scopus.com/inward/record.url?scp=84878297034&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84878297034&partnerID=8YFLogxK
U2 - 10.1002/asia.201300068
DO - 10.1002/asia.201300068
M3 - Article
C2 - 23495248
AN - SCOPUS:84878297034
VL - 8
SP - 1295
EP - 1300
JO - Chemistry - An Asian Journal
JF - Chemistry - An Asian Journal
SN - 1861-4728
IS - 6
ER -