Ordered mesoporous Co3O4 spinels as stable, bifunctional, noble metal-free oxygen electrocatalysts

Jin, Young; Kwon, Kyungjung; Cheon, Jae Yeong; Kleitz, Freddy; Joo, Sang Hoon

doi:10.1039/c3ta11917c

Cited by 272 publications

(230 citation statements)

References 54 publications

Supporting

Mentioning

199

Contrasting

Unclassified

Order By: Relevance

“…[57] Another attractive characteristic of CoPi is its bifunctionality, since it can be reversibly catalyze OER or the hydrogen evolving reaction (HER) through a self-repairing equilibrium with Co 2+ species in solution. [ 58 ] In this line, mesoporous Co3O4 has proved to be stable achieving high current densities both for OER and for the oxygen reduction reaction (ORR), [59] showing potential to replace noble metalbased catalysts in air-metal batteries. Bard et al compared Co3O4 and CoPi using dynamic potential-pH diagrams.…”

Section: Cobalt Oxidesmentioning

confidence: 99%

Water Oxidation at Electrodes Modified with Earth‐Abundant Transition‐Metal Catalysts

2014

View full text Add to dashboard Cite

show abstract

Section: Cobalt Oxidesmentioning

confidence: 99%

Water Oxidation at Electrodes Modified with Earth‐Abundant Transition‐Metal Catalysts

2014

View full text Add to dashboard Cite

show abstract

“…Various non-noble materials have been developed for ORR or OER [4][5][6][7][8], including but not limited to carbon, polymer,…”

Section: Introductionmentioning

confidence: 99%

Efficiently Enhancing Electrocatalytic Activity of α-MnO2 Nanorods/N-Doped Ketjenblack Carbon for Oxygen Reduction Reaction and Oxygen Evolution Reaction Using Facile Regulated Hydrothermal Treatment

Wang

Chen

et al. 2018

Catalysts

View full text Add to dashboard Cite

Scalable, low-cost and highly efficient catalysis of oxygen electrocatalytic reactions (ORR/OER) are required for the rapid development of clean and renewable energy conversion/storage technologies. Herein, two types of α-MnO 2 nanorods were prepared under hydrothermal treatment at 150 • C for 0.5 h (MnO 2 -150-0.5) or 120 • C for 12 h (MnO 2 -120-12), then supported on N-doped ketjenblack carbon (N-KB) as bi-functional ORR/OER catalysts. Their electrocatalytic activities toward ORR and OER were investigated systematically. As a result, MnO 2 -150-0.5/N-KB displays superior ORR catalytic activity, with much more positive half-wave potential and much larger limiting current density (0.76 V and 6.0 mA cm −2 ), comparable to those of 20 wt. % Pt/C (0.82 V and 5.10 mA cm −2 ). MnO 2 -150-0.5/N-KB also shows high electron transfer number (3.86~3.97) and low yield of peroxides (1-7%) during ORR process in the whole potential range of 0-1.0 V (vs. RHE). Meanwhile, the MnO 2 -150-0.5/N-KB also exhibits better OER activity with low overpotential, comparable to IrO 2 /N-KB. The excellent electrocatalytic activity of MnO 2 -150-0.5/N-KB can be attributed to the synergistic effect, relatively smaller size, higher amount of Mn 3+ , and low charge transfer resistance. This work offers a new strategy for scalable preparation of more efficient and cost-effective α-MnO 2 bi-functional oxygen catalysts.

show abstract

“…In the red line, all the characteristic peaks marked by ''&'' were fit for the Co 3 O 4 standard pattern well (JCPDS No. 65-3103) [32,34]. From the green line of SnO 2 -Co 3 O 4 , it could be clearly seen that the diffraction peak at 60.9°agreed well with the (5 1 1) lattice planes of Co 3 O 4 and the peaks at 34.3°and 51.9°existed in the pure SnO 2 pattern, which confirmed the formation of SnO 2 -Co 3 O 4 composite.…”

Section: Resultsmentioning

confidence: 58%

Carbon quantum dots/SnO2–Co3O4 composite for highly efficient electrochemical water oxidation

Zhao

Liu

et al. 2015

Carbon

114

View full text Add to dashboard Cite

Ordered mesoporous Co3O4 spinels as stable, bifunctional, noble metal-free oxygen electrocatalysts

Cited by 272 publications

References 54 publications

Water Oxidation at Electrodes Modified with Earth‐Abundant Transition‐Metal Catalysts

Water Oxidation at Electrodes Modified with Earth‐Abundant Transition‐Metal Catalysts

Efficiently Enhancing Electrocatalytic Activity of α-MnO2 Nanorods/N-Doped Ketjenblack Carbon for Oxygen Reduction Reaction and Oxygen Evolution Reaction Using Facile Regulated Hydrothermal Treatment

Carbon quantum dots/SnO2–Co3O4 composite for highly efficient electrochemical water oxidation

Contact Info

Product

Resources

About