A Newly Designed Titanium Anode for Oxygen Evolution at High Current Densities

Kamegaya, Yoichi; Sasaki, Kouki; Oguri, Masayuki; Asaki, T.; Mitamura, Takashi

doi:10.5796/electrochemistry.61.802

Denki Kagaku1961

1993

DOI: 10.5796/electrochemistry.61.802

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A Newly Designed Titanium Anode for Oxygen Evolution at High Current Densities

Yoichi Kamegaya¹,

Kouki Sasaki²,

Masayuki Oguri³

et al.

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“…[6][7][8][9] The use of Cl-free compounds such as Pt(NH 3 ) 2 (NO 2 ) 2 , Pt(NH 3 ) 4 (OH) 2 , Ru 3 (CO) 12 , and RuNO(NO 3 ) x as metal sources affords higher catalyst dispersion states compared to Cl-containing H 2 PtCl 6 and RuCl 3 . 6,7,10,11 Accordingly, the combination of such Clfree compounds; for example, Pt(NH 3 ) 2 (NO 2 ) 2 -RuNO(NO 3 ) x in concentrated acid, yields highly effective catalysts. 6 Numerous factors (e.g., morphology, structure, composition, uniformity, dispersion state, and alloying state) influence the catalytic activity.…”

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confidence: 99%

Effect of Structure of Carbon-Supported PtRu Electrocatalysts on the Electrochemical Oxidation of Methanol

Takasu

Fujiwara

Murakami

et al. 2000

J. Electrochem. Soc.

173

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Carbon-supported binary PtRu electrocatalysts were prepared by coimpregnation using ethanolic solutions of Pt(NH 3 ) 2 (NO 2 ) 2 as the Pt source, various Ru sources [RuCl 3 , Ru 3 (CO) 12 , and RuNO(NO 3 ) x ], and carbon black by thermal decomposition under reducing conditions, and their structure, morphology, and electrocatalytic properties were investigated. X-ray diffraction analysis and high resolution scanning electron microscopy indicated that the use of Cl-free Ru sources, i.e., Ru 3 (CO) 12 or RuNO(NO 3 ) x , afforded highly dispersed and uniform PtRu nanoparticles. Surface area measurements conducted by electro-oxidation of preadsorbed carbon monoxide indicated that the use of Ru 3 (CO) 12 as the Ru source yielded high surface area catalysts. In terms of the surfacearea specific current density (current density normalized by the specific surface area of PtRu metal obtained from preadsorbed CO electro-oxidation measurements), the electrocatalytic activity of Pt(NH 3 ) 2 (NO 2 ) 2 -Ru 3 (CO) 12 and Pt(NH 3 ) 2 (NO 2 ) 2 -RuNO(NO 3 ) x were equal. PtRu/C electrocatalysts prepared from ethanolic solutions of Pt(NH 3 ) 2 (NO 2 ) 2 -Ru 3 (CO) 12 resulted in high mass-specific activity toward methanol oxidation, with mass-specific current density as high as 159 mA mg Ϫ1 Pt at 500 mV. The efficiency of PtRu/C electrodes is discussed based on the significance of the use of Cl-free Ru sources.

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mentioning

confidence: 99%

Effect of Structure of Carbon-Supported PtRu Electrocatalysts on the Electrochemical Oxidation of Methanol

Takasu

Fujiwara

Murakami

et al. 2000

J. Electrochem. Soc.

173

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Electrodeposition of platinum on 3D-printed titanium mesh to produce tailored, high area anodes

Arenas

Kaishubayeva

León

et al. 2020

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A Newly Designed Titanium Anode for Oxygen Evolution at High Current Densities

Cited by 2 publications

References 0 publications

Effect of Structure of Carbon-Supported PtRu Electrocatalysts on the Electrochemical Oxidation of Methanol

Effect of Structure of Carbon-Supported PtRu Electrocatalysts on the Electrochemical Oxidation of Methanol

Electrodeposition of platinum on 3D-printed titanium mesh to produce tailored, high area anodes

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