Reductive annealing for generating Se doped 20 wt% Ru/C cathode catalysts for the oxygen reduction reaction

K. S. Nagabhushana; E. Dinjus; H. Bönnemann; V. Zaikovskii; C. Hartnig; G. Zehl; I. Dorbandt; S. Fiechter; P. Bogdanoff

doi:10.1007/s10800-007-9423-0

Reductive annealing for generating Se doped 20 wt% Ru/C cathode catalysts for the oxygen reduction reaction

K. S. Nagabhushana, E. Dinjus, H. Bönnemann, V. Zaikovskii, C. Hartnig, G. Zehl, I. Dorbandt, S. Fiechter, P. Bogdanoff

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Reductive annealing was chosen as a method for the syntheses of Se modified Ru/C catalysts. Initial preparation of a 20 wt% Ru/C was performed by impregnating RuCl₃•2H₂O on Vulcan XC72 with subsequent conditioning using H₂ at 250 °C for 4 h. Surface treatment of Ru/C by SeO₂ followed by reductive annealing produced Se modified Ru/C catalysts with a pre-determined Ru:Se = 1:0.15 and 1:1 a/o. Structural characterization was carried out using HRTEM while electrochemical characterization was performed using RDE measurements. It is concluded that the presence of Se on Ru has a positive effect on the oxygen reduction reaction of RuSe/C catalyst systems with an optimal loading of Se close to a Ru:Se ratio of 1:0.15 a/o. Overloading of selenium led to neutralization of its promoting effect.

Original language	English
Pages (from-to)	1515-1522
Number of pages	8
Journal	Journal of Applied Electrochemistry
Volume	37
Issue number	12
DOIs	https://doi.org/10.1007/s10800-007-9423-0
Publication status	Published - 01-12-2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Materials Chemistry
Electrochemistry

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10.1007/s10800-007-9423-0

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title = "Reductive annealing for generating Se doped 20 wt% Ru/C cathode catalysts for the oxygen reduction reaction",

abstract = "Reductive annealing was chosen as a method for the syntheses of Se modified Ru/C catalysts. Initial preparation of a 20 wt% Ru/C was performed by impregnating RuCl3•2H2O on Vulcan XC72 with subsequent conditioning using H2 at 250 °C for 4 h. Surface treatment of Ru/C by SeO2 followed by reductive annealing produced Se modified Ru/C catalysts with a pre-determined Ru:Se = 1:0.15 and 1:1 a/o. Structural characterization was carried out using HRTEM while electrochemical characterization was performed using RDE measurements. It is concluded that the presence of Se on Ru has a positive effect on the oxygen reduction reaction of RuSe/C catalyst systems with an optimal loading of Se close to a Ru:Se ratio of 1:0.15 a/o. Overloading of selenium led to neutralization of its promoting effect.",

author = "Nagabhushana, {K. S.} and E. Dinjus and H. B{\"o}nnemann and V. Zaikovskii and C. Hartnig and G. Zehl and I. Dorbandt and S. Fiechter and P. Bogdanoff",

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doi = "10.1007/s10800-007-9423-0",

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T1 - Reductive annealing for generating Se doped 20 wt% Ru/C cathode catalysts for the oxygen reduction reaction

AU - Nagabhushana, K. S.

AU - Dinjus, E.

AU - Bönnemann, H.

AU - Zaikovskii, V.

AU - Hartnig, C.

AU - Zehl, G.

AU - Dorbandt, I.

AU - Fiechter, S.

AU - Bogdanoff, P.

PY - 2007/12/1

Y1 - 2007/12/1

N2 - Reductive annealing was chosen as a method for the syntheses of Se modified Ru/C catalysts. Initial preparation of a 20 wt% Ru/C was performed by impregnating RuCl3•2H2O on Vulcan XC72 with subsequent conditioning using H2 at 250 °C for 4 h. Surface treatment of Ru/C by SeO2 followed by reductive annealing produced Se modified Ru/C catalysts with a pre-determined Ru:Se = 1:0.15 and 1:1 a/o. Structural characterization was carried out using HRTEM while electrochemical characterization was performed using RDE measurements. It is concluded that the presence of Se on Ru has a positive effect on the oxygen reduction reaction of RuSe/C catalyst systems with an optimal loading of Se close to a Ru:Se ratio of 1:0.15 a/o. Overloading of selenium led to neutralization of its promoting effect.

AB - Reductive annealing was chosen as a method for the syntheses of Se modified Ru/C catalysts. Initial preparation of a 20 wt% Ru/C was performed by impregnating RuCl3•2H2O on Vulcan XC72 with subsequent conditioning using H2 at 250 °C for 4 h. Surface treatment of Ru/C by SeO2 followed by reductive annealing produced Se modified Ru/C catalysts with a pre-determined Ru:Se = 1:0.15 and 1:1 a/o. Structural characterization was carried out using HRTEM while electrochemical characterization was performed using RDE measurements. It is concluded that the presence of Se on Ru has a positive effect on the oxygen reduction reaction of RuSe/C catalyst systems with an optimal loading of Se close to a Ru:Se ratio of 1:0.15 a/o. Overloading of selenium led to neutralization of its promoting effect.

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JO - Journal of Applied Electrochemistry

JF - Journal of Applied Electrochemistry

IS - 12

ER -

Reductive annealing for generating Se doped 20 wt% Ru/C cathode catalysts for the oxygen reduction reaction

Abstract

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