Amino acid-derived non-precious catalysts with excellent electrocatalytic performance and methanol tolerance in oxygen reduction reaction

Kwak, Da-Hee; Han, Sang-Beom; Kim, Do-Hyoung; Won, Ji-Eun; Park, Kyung-Won

doi:10.1016/j.apcatb.2018.07.013

Cited by 40 publications

(23 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the basis of the data reported in Figure 2, the most active electro-catalyst [47] showed an onset potential (0.95 V) and E1/2 (0.85 V), very close to the benchmark Pt/C in acidic conditions. Moreover, the authors of [47] compared the half wave potential of Pt/C and Cys2/Fe0.3/C in an O2 saturated 0.5 M H2SO4 electrolyte, containing different methanol concentrations. It appears that the non-PGM catalyst had an excellent methanol tolerance; the most positive E1/2 value was observed also with a low methanol concentration in the electrolyte.…”

Section: Oxygen Reduction Reaction With Methanol Tolerance In An Acidsupporting

confidence: 54%

“…Another class of precursors largely employed for the synthesis of the Fe-N-C or Co-N-C catalysts is based on porphyrins [45][46][47][48][49]. Serov et al [45] synthesized non-PGM catalysts based on M-tetraphenylporphyrin (TPP) (M: Fe, Co, Ni, Cu, Mn, and Zn) and iron phthalocyanine (PC).…”

Section: Synthesis Of Noble Metal Free Catalystsmentioning

confidence: 99%

“…Kong et al [46] prepared Co-N-C catalysts by mixing etched graphene oxide (GO) sheets with abundant in-plane pores and a porphyrin containing both Co and N elements as the doping precursor. Kwak et al [47] used different ratios of cysteine (S and N source) and iron (III) tetramethoxyphenylporphyrin (FeTMPP) to achieve a porous material, characterized by a different crystallinity, after a thermochemical decomposition at 900 • C in a N 2 atmosphere. In this procedure, a silica material was used to transfer the porous template to the carbon structure.…”

Section: Synthesis Of Noble Metal Free Catalystsmentioning

confidence: 99%

See 2 more Smart Citations

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

et al. 2018

View full text Add to dashboard Cite

Direct methanol fuel cells (DMFCs) are emerging technologies for the electrochemical conversion of the chemical energy of a fuel (methanol) directly into electrical energy, with a low environmental impact and high efficiency. Yet, before this technology can reach a large-scale diffusion, specific issues must be solved, in particular, the high cost of the cell components. In a direct methanol fuel cell system, high capital costs are mainly derived from the use of noble metal catalysts; therefore, the development of low-cost electro-catalysts, satisfying the target requirements of high performance and durability, represents an important challenge. The research is currently addressed to the development of metal-nitrogen-carbon (M-N-C) materials as cheap and sustainable catalysts for the oxygen reduction reaction (ORR) in an acid environment, for application in polymer electrolyte fuel cells fueled by hydrogen or alcohol. In particular, this mini-review summarizes the recent advancements achieved in DMFCs using M-N-C catalysts. The presented analysis is restricted to M-N-C catalysts mounted at the cathode of a DMFC or investigated in rotating disk electrode (RDE) configuration for the ORR in the presence of methanol in order to study alcohol tolerance. The main synthetic routes and characteristics of the catalysts are also presented.

show abstract

Section: Oxygen Reduction Reaction With Methanol Tolerance In An Acidsupporting

confidence: 54%

Section: Synthesis Of Noble Metal Free Catalystsmentioning

confidence: 99%

Section: Synthesis Of Noble Metal Free Catalystsmentioning

confidence: 99%

See 1 more Smart Citation

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

et al. 2018

View full text Add to dashboard Cite

show abstract

“…To verify practical applications of the catalysts, chronoamperometric measurements were used to evaluatet heir selectivity and long-term durability in O 2 -saturated 0.1 m KOH solution at ah alf-wave potential of 0.86 V. [35] Regarding long-term durability,C o-NOPC exhibits minimal loss of activity with ar etention of 85 %a fter 24 h, which is significantly higher than that of commercial Pt/C, which exhibits 69 %r etention, corresponding to twofoldl arger loss of activity (Figure 5e). [36] To assess the consequences of methanolc rossover for the performance of Co-NOPC,m ethanol (10 mL) was instantaneously added to 0.1 m KOH solution (100 mL) to investigate the methanolt olerance of catalysts during the chronoamperometric measurements (Figure 5f).…”

Section: Resultsmentioning

confidence: 99%

Rational Design of Hierarchical, Porous, Co‐Supported, N‐Doped Carbon Architectures as Electrocatalyst for Oxygen Reduction

et al. 2020

View full text Add to dashboard Cite

Developing highly active nonprecious‐metal catalysts for the oxygen reduction reaction (ORR) is of great significance for reducing the cost of fuel cells. 3D‐ordered porous structures could substantially improve the performance of the catalysts because of their excellent mass‐diffusion properties and high specific surface areas. Herein, ordered porous ZIF‐67 was prepared by forced molding of a polystyrene template, and Co‐supported, N‐doped, 3D‐ordered porous carbon (Co‐NOPC) was obtained after further carbonization. Co‐NOPC exhibited excellent performance for the ORR in an alkaline medium with a half‐wave potential of 0.86 V vs. reversible hydrogen electrode (RHE), which is higher than that of the state‐of‐the‐art Pt/C (0.85 V vs. RHE). Moreover, the substantially improved catalytic performance of Co‐NOPC compared with Co‐supported, N‐doped carbon revealed the key role of its hierarchical porosity in boosting the ORR. Co‐NOPC also exhibited a close‐to‐ideal four‐electron transfer path, long‐term durability, and resistance to methanol penetration, which make it promising for large‐scale application.

show abstract

“…On the other hand, the advisable engineering of nanostructures (e. g. nanosheets, nanotubes, and nanospheres) with hierarchical porosity also provides additional structural advantages, for instance, the large specific surface area to well‐exposed active sites, and sophisticated pore channels to the improved mass and electron transport, which is highly conducive to enhancing catalytic activities of carbon materials . However, classical approaches for constructing porous structure, including nanocasting and soft templating, have drawbacks of tedious procedures to remove the templates or harsh reaction conditions . Searching for new protocols to construct carbon catalysts with abundant porosity and large surface area is still highly requisite.…”

Section: Introductionmentioning

confidence: 99%

Melamine‐Induced N,S‐Codoped Hierarchically Porous Carbon Nanosheets for Enhanced Electrocatalytic Oxygen Reduction

Tian

Ren

et al. 2020

ChemistrySelect

View full text Add to dashboard Cite

Exploring an efficient strategy to enhance the catalytic oxygen reduction performance of carbon‐based catalysts is of great significance in the field of electrocatalysis. In this work, through a facile polymerization‐carbonization approach under the regulation of melamine, N,S‐codoped hierarchically porous carbon nanosheets with controllable morphology are fabricated by using polyaniline as the precursor. The resultant catalysts have favorable features of the synergetic effect of N,S co‐doping and the advanced structural property with high specific surface area and hierarchical pore structure, contributing to an encouraging onset potential (Eonset = 0.94 V) in alkaline media, comparable to that of Pt/C catalysts, as well as excellent electrochemical stability and methanol tolerance. By rationally adjusting the experimental parameters, the mechanism of melamine on the formation of final porous nanosheet structure during high‐temperature pyrolysis is clarified, and the optimal experimental conditions for the superior catalysts are also discussed. Furthermore, a rechargeable Zn‐air battery constructed with the resulting materials exhibits desirable performance with low charge‐discharge gap and impressive life‐span. This contribution would supply some novel inspiration to design carbon‐based materials with desired features for energy‐related technologies.

show abstract

Amino acid-derived non-precious catalysts with excellent electrocatalytic performance and methanol tolerance in oxygen reduction reaction

Cited by 40 publications

References 77 publications

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

Methanol-Tolerant M–N–C Catalysts for Oxygen Reduction Reactions in Acidic Media and Their Application in Direct Methanol Fuel Cells

Rational Design of Hierarchical, Porous, Co‐Supported, N‐Doped Carbon Architectures as Electrocatalyst for Oxygen Reduction

Melamine‐Induced N,S‐Codoped Hierarchically Porous Carbon Nanosheets for Enhanced Electrocatalytic Oxygen Reduction

Contact Info

Product

Resources

About