In-situ electrochemical impedance spectroscopy measurement of anodic reaction in SO2 depolarized electrolysis process

Xue, Lulu; Zhang, Ping; Chen, Songzhe; Wang, Laijun

doi:10.1016/j.cep.2015.01.005

Cited by 16 publications

(3 citation statements)

References 24 publications

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“…The electrocatalytic oxidation mechanism of SO 2 has been studied since 1980. − Recently, considerable research efforts have been devoted to the development of efficient SO 2 electrocatalytic oxidation catalysts. Owing to the limitations of the reaction, only a few precious metals can exhibit good SO 2 catalytic performances .…”

Section: Introductionmentioning

confidence: 99%

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation

Huang

Wang

et al. 2019

Langmuir

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In the electrochemical Bunsen reaction, which is the key reaction of the sulfur-iodide cycle, the main overpotential corresponds to the oxidation of SO 2 . The catalysts currently used for the liquid phase electrocatalytic oxidation of SO 2 are mainly based on noble metals, which have excellent corrosion resistance and catalytic activity in an acidic environment. To improve the performance of the commercial Pt catalyst, a Pt catalyst with reduced graphene oxide (RGO) and carbon black as a hybrid support was synthesized by the microwave-assisted polyol reduction process. The large two-dimensional planar structure of RGO was a better anchor for Pt nanoparticles, and a catalyst with fine and uniform distribution of Pt particles was obtained. The carbon black interior prevented the agglomeration of RGO, forming a stereoscopic catalyst structure. The electrochemical test results showed that the RGO/carbon black hybrid support catalyst possessed a higher electrocatalytic activity than the single support catalysts and could be used as an efficient and stable catalyst for the SO 2 electrolyzer.

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Section: Introductionmentioning

confidence: 99%

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation

Huang

Wang

et al. 2019

Langmuir

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“…There are various thermochemical cycles (a combination of thermochemical and Electronic supplementary material The online version of this article (doi:10.1007/s12678-016-0319-9) contains supplementary material, which is available to authorized users. electrochemical reactions [5]) that can produce hydrogen from water with the HyS cycle (reactions 1-4) being the most promising [4,[6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Co-sputtered PtxPdyAlz thin film electrocatalysts for the production of hydrogen via SO2(aq) electro-oxidation

et al. 2016

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A co-sputtered Pt x Pd y Al z ternary system was investigated for potential use as anode catalyst for the electrooxidation of aqueous sulphur dioxide (SO 2 ), a key reaction in the hybrid sulphur (HyS) process for splitting water into hydrogen and oxygen. Combining the noble metals Pt and Pd with Al resulted in no significant improvement in onset potential; however, current output was improved for the majority of the electrocatalysts evaluated. Of these electrocatalysts, only a single ternary composition exhibited improved stability when compared to pure Pt. It was found that a combination of Pt 40 Pd 57 Al 3 (annealed at 900°C) exhibited superior performance when compared to pure Pt and the previously determined best binary electrocatalyst, i.e. Pt 3 Pd 2 . Current density (mA.mg Pt −1 ) increased from 108.11 to 181.21 and finally to 396.73 for Pt, Pt 3 Pd 2 and Pt 40 Pd 57 Al 3 , respectively, indicating an increase in activity that correlates with a decrease in Pt content. Atomic force microscopy (AFM) revealed an increase in surface roughness for Pt, Pt 3 Pd 2 and Pt 40 Pd 57 Al 3 , while the occurrence of metal interaction and certain degrees of Al migration (a result of annealing) was confirmed for Pt 40 Pd 57 Al 3 by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction analysis (XRD).

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“…HyS is the only practical two-step thermochemical cycle with all fluid reactants, which greatly simplifies material handling and processing and reduces capital costs. Various aspects of HyS are the subject of active research internationally as indicated by a quick gleaning of the literature since 2015 [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Both reaction steps have been experimentally validated [16,20] and detailed system designs have been proposed for continuous, steady-state applications [21,22].…”

Section: Introductionmentioning

confidence: 99%

Development of the hybrid sulfur cycle for use with concentrated solar heat. I. Conceptual design

Gorensek

Corgnale

Summers

2017

International Journal of Hydrogen Energy

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Development of the hybrid sulfur cycle for use with concentrated solar heat input Highlights  Design options evaluated for hybrid sulfur cycle water-splitting using solar heat  Indirect solar heating with thermal energy storage using falling particle receiver  Continuous operation with liquid-fed electrolyzer, bayonet acid decomposer  Detailed flowsheet with material and energy balances prepared and presented  35.0% LHV cycle efficiency, 17.0% solar-to-H 2 conversion ratio estimated *Highlights (for review)

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In-situ electrochemical impedance spectroscopy measurement of anodic reaction in SO2 depolarized electrolysis process

Cited by 16 publications

References 24 publications

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation

Co-sputtered PtxPdyAlz thin film electrocatalysts for the production of hydrogen via SO2(aq) electro-oxidation

Development of the hybrid sulfur cycle for use with concentrated solar heat. I. Conceptual design

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In-situ electrochemical impedance spectroscopy measurement of anodic reaction in SO2 depolarized electrolysis process

Cited by 16 publications

References 24 publications

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO2 Electrocatalytic Oxidation

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO2 Electrocatalytic Oxidation

Co-sputtered PtxPdyAlz thin film electrocatalysts for the production of hydrogen via SO2(aq) electro-oxidation

Development of the hybrid sulfur cycle for use with concentrated solar heat. I. Conceptual design

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High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation

High-Performance Pt Catalyst with Graphene/Carbon Black as a Hybrid Support for SO₂ Electrocatalytic Oxidation