RuO<sub>x</sub>-decorated multimetallic hetero-nanocages as highly efficient electrocatalysts toward the methanol oxidation reaction

Park, Jongsik; Kim, Hee Jin; Oh, Aram; Kwon, Taehyun; Baik, Hionsuck; Choi, Sang‐Il; Lee, Kwangyeol

doi:10.1039/c8nr06168h

Cited by 25 publications

(9 citation statements)

References 59 publications

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“…Unfortunately, most electrochemical methanol oxidations have been limited to noble‐metal‐based catalysts. In particular, the oxidative products are generally CO 2 and H 2 O, which is failed to realize the selective electrooxidation of methanol . As one of the products for methanol partial oxidation, formic acid as a bulk chemical is sold with higher price for 539 € per ton, and has been widely used in pharmaceutical, leather, rubber, textile, and pesticide industries .…”

Section: Introductionmentioning

confidence: 99%

Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Xiang

Deng

et al. 2020

Adv Funct Materials

227

145

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The sluggish kinetics of oxygen evolution reaction (OER) is the main bottleneck for the electrocatalytic water splitting to produce hydrogen (H2), and the by‐product is worthless O2. Therefore, designing a thermodynamically favorable oxidation reaction to replace OER and coupling with value‐added product generation on the anode is of significance for boosting H2 generation under low electrolysis voltage. Herein, cobalt hydroxide@hydroxysulfide nanosheets on carbon paper (Co(OH)2@HOS/CP) are synthesized as bifunctional electrocatalysts to facilitate H2 production and convert methanol to valuable formate simultaneously. Benefiting from the influences/changes on the composition, surface properties, electronic structure, and chemistry of Co(OH)2, the as‐obtained electrodes exhibit very high selectivity for methanol to value‐added formate oxidation (MFO) and boost electrocatalytic performance with low overpotential of 155 mV for MFO and 148 mV for hydrogen evolution reaction at a current density of 10 mA cm−2. Furthermore, the integrated two‐electrode electrolyzer drives 10 mA cm−2 at a cell voltage of 1.497 V with united 100% Faradaic efficiency for anodic and cathodic reaction and continuous 20 h of operation without obvious decay. The electrocatalytic hydrogen production with the assistance of alternative oxidation by the robust electrocatalyst can be further used to realize the upgrading of other organic molecules with less energy consumption.

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Section: Introductionmentioning

confidence: 99%

Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Xiang

Deng

et al. 2020

Adv Funct Materials

227

145

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“…Ru-Pt-Cu alloy based systems have actually been synthesized and found to catalyze the electrochemical methanol oxidation reaction well. 54,55 The ability to catalyze electrochemical methanol oxidation is encouraging since it may bear some resemblance to COOR. The Ru-Pd catalyst (based on PdRuPdPd ) is also predicted to be a good catalyst with proper reaction energy but a little higher activation energy.…”

Section: Tailoring the Coor Catalytic Sitementioning

confidence: 99%

Rationally Tailoring Catalysts for the CO Oxidation Reaction by Using DFT Calculations

Yan

Kristoffersen

Pedersen

et al. 2021

Preprint

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Rational design of catalysts by tailoring specific surface sites with different elements could result in catalysts with high activity, selectivity and stability. In this work, we show that *CO on-top and O* on-top adsorption energies are good descriptors for catalysis of the CO oxidation reaction (COOR) on pure metals and binary alloys. The observed Brønsted-Evans-Polanyi (BEP) and scaling relations for COOR on different surfaces are incorporated into a predictive model that uses the binding strength of the four adjacent metal atoms making up the active site for COOR catalysis to estimate reaction and activation energies. The model is used to screen 161 multi-metallic catalyst candidates made by combining Ru, Pt, Pd, Cu and Au at these four sites. The screening and subsequent calculations suggest that Ru-Pt-Cu alloys are good catalysts for COOR. Our study shows that it is possible to use information from pure metals and binary alloys to predict the catalytic behavior of more complex alloys, and hereby reduce the computational cost of identifying new catalyst candidates for COOR.

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“…Direct methanol fuel cells (DMFCs) have received great attention as promising candidates for the renewable energy system in portable electronic devices and unmanned aerial vehicles [1][2][3][4][5]. Pt has been used as a typical catalyst for the methanol oxidation reaction (MOR) at the anode of the DMFCs [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, owing to the high cost and low abundance of Pt, the practical use of the DMFCs has been limited for decades. To address these issues, significant efforts have been made toward the development of bimetallic structures by alloying Pt with another transition metal, and thus overcome the CO poisoning effect, reduce the Pt loading, and improve the MOR activity [3,11].…”

Section: Introductionmentioning

confidence: 99%

Surface elemental distribution effect of Pt-Pb hexagonal nanoplates for electrocatalytic methanol oxidation reaction

Kim

Ahn

Kim

et al. 2020

Chinese Journal of Catalysis

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Bimetallic Pt-based catalysts have been extensively investigated to enhance the performance of direct methanol fuel cells (DMFCs) because CO, a by-product, reduces the activity of the pure Pt catalysts. Herein, we synthesized Pt-Pb hexagonal nanoplates as a model catalyst for the methanol oxidation reaction (MOR) and further controlled the Pt and Pb distributions on the surface of the nanoplates through acetic acid (HAc) treatment. As a result, we obtained Pt-Pb nanoplates and HAc-treated Pt-Pb nanoplates with homogeneous and heterogeneous distributions of the Pt-Pb alloy surfaces, respectively. We showed that the MOR activity and stability of the Pt-Pb nanoplates improved compared to those of the HAc-treated Pt-Pb nanoplates, mainly due to the enhanced CO tolerance and the modified electronic structure of Pt under the influence of the oxophilic Pb.

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RuO_x-decorated multimetallic hetero-nanocages as highly efficient electrocatalysts toward the methanol oxidation reaction

Abstract: RuOx-decorated RuPtCu hetero-nanocages exhibit highly active and stable electrocatalytic performances toward the methanol oxidation reaction.

Cited by 25 publications

References 59 publications

Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Rationally Tailoring Catalysts for the CO Oxidation Reaction by Using DFT Calculations

Surface elemental distribution effect of Pt-Pb hexagonal nanoplates for electrocatalytic methanol oxidation reaction

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RuOx-decorated multimetallic hetero-nanocages as highly efficient electrocatalysts toward the methanol oxidation reaction

Abstract: RuOx-decorated RuPtCu hetero-nanocages exhibit highly active and stable electrocatalytic performances toward the methanol oxidation reaction.

Cited by 25 publications

References 59 publications

Boosting H2 Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Boosting H2 Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Rationally Tailoring Catalysts for the CO Oxidation Reaction by Using DFT Calculations

Surface elemental distribution effect of Pt-Pb hexagonal nanoplates for electrocatalytic methanol oxidation reaction

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Product

Resources

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RuO_x-decorated multimetallic hetero-nanocages as highly efficient electrocatalysts toward the methanol oxidation reaction

Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts

Boosting H₂ Generation Coupled with Selective Oxidation of Methanol into Value‐Added Chemical over Cobalt Hydroxide@Hydroxysulfide Nanosheets Electrocatalysts