Preparation of Pt-Pd catalysts for direct formic acid fuel cell and their characteristics

Kim, Ki Ho; Yu, Jung Hwan; Lee, Hyo Song; Choi, Jae Ho; Noh, Soon Young; Yoon, Soo Kyung; Lee, Chang‐Soo; Hwang, Taek Sung; Rhee, Young Woo

doi:10.1007/s11814-007-0091-x

Cited by 10 publications

(5 citation statements)

References 16 publications

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“…HCOOH electro-oxidation on Pt is usually explained as a dual-path mechanism [10,[14][15][16][17][18][19] which was originally proposed by Capon et al [20,21]: the indirect pathway leads to CO formation, followed by its electro-oxidation to CO2; the direct pathway involves the direct formation of CO2 (without producing CO). CO production during HCOOH electro-oxidation represents a significant problem for Pt-based fuel cells since the adsorbed CO acts as a poison, limiting the FC operation.…”

Section: Introductionmentioning

confidence: 99%

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Density functional theory studies of HCOOH decomposition on Pd(111)

Scaranto

Mavrikakis

2016

Surface Science

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The investigation of formic acid (HCOOH) decomposition on transition metal surfaces is important to derive useful insights for vapor phase catalysis involving HCOOH and for the development of direct HCOOH fuel cells (DFAFC). Here we present the results obtained from periodic, self-consistent, density functional theory (DFT-GGA) calculations for the elementary steps involved in the gas-phase decomposition of HCOOH on Pd(111). Accordingly, we analyzed the minimum energy paths for HCOOH dehydrogenation to CO2 + H2 and dehydration to CO + H2O through the carboxyl (COOH) and formate (HCOO) intermediates. Our results suggest that HCOO formation is easier than COOH formation, but HCOO decomposition is more difficult than COOH decomposition, in particular in the presence of co-adsorbed O and OH species. Therefore, both paths may contribute to HCOOH decomposition. CO formation goes mainly through COOH decomposition.

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Section: Introductionmentioning

confidence: 99%

“…Finally, the transition state structures for all the remaining steps (i.e. steps[12][13][14][15][16][17][18][19][20] are displayed inFigures 8 and 9; the reaction coordinates are reported in the Supporting Information (Figures S7-S15).…”

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confidence: 99%

Density functional theory studies of HCOOH decomposition on Pd(111)

Scaranto

Mavrikakis

2016

Surface Science

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“…Therefore, the Pt catalyst induced the rapid generation of H 2 or radicals decomposed by formic acid at around 200 °C, and this result corresponds to the catalystic reaction of formic acid with copper in previous studies. 19,32) Additionally, the profiles of the pair of H 2 [Fig. 12(b)] and CO 2 [Fig.…”

Section: Tg-qms Analysis Resultsmentioning

confidence: 99%

Reduction reaction analysis of nanoparticle copper oxide for copper direct bonding using formic acid

Fujino¹,

Akaike²,

Matsuoka³

et al. 2017

Jpn. J. Appl. Phys.

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Copper direct bonding is required for electronics devices, especially power devices, and copper direct bonding using formic acid is expected to lower the bonding temperature. In this research, we analyzed the reduction reaction of copper oxide using formic acid with a Pt catalyst by electron spin resonance analysis and thermal gravimetry analysis. It was found that formic acid was decomposed and radicals were generated under 200 °C. The amount of radicals generated was increased by adding the Pt catalyst. Because of these radicals, both copper(I) oxide and copper(II) oxide start to be decomposed below 200 °C, and the reduction of copper oxide is accelerated by reactants such as H2 and CO from the decomposition of formic acid above 200 °C. The Pt catalyst also accelerates the reaction of copper oxide reduction. Herewith, it is considered that the copper surface can be controlled more precisely by using formic acid to induce direct bonding.

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“…Controlled synthesis of nanoparticles of narrow size distribution and well-defined structure has been of central importance in the field of colloid science. [1][2][3][4][5][6][7] Specifically, nanoparticles have found numerous novel application, for instance, in fuel-cell catalysts, 8,9 microelectronics, 1,3 solar panels, 10,11 as well as in biotechnology. [12][13][14] At the nanoscale, the field has faced new challenges in both experimentally probing and theoretically explaining size and shape selection mechanisms, which can be different from those at the micron scale.…”

Section: Introductionmentioning

confidence: 99%

Growth of highly crystalline nickel particles by diffusional capture of atoms

Sevonkaev

Privman

Goia

2013

The Journal of Chemical Physics

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We report a new approach to achieve growth of highly crystalline nickel nanoparticles over an extended range of sizes (up to 100 nm in diameter) and time scales (up to several hours) by diffusional transport of constituent atoms. The experimental procedure presented offers control of the morphology of the resulting particles and yields base metal nanocrystals suitable for epitaxial deposition of noble metal shells and the preparation of materials with improved catalytic properties. The reported precipitation system also provides a good model for testing a diffusion-driven growth mechanism developed specifically for the reduction process described.

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Preparation of Pt-Pd catalysts for direct formic acid fuel cell and their characteristics

Cited by 10 publications

References 16 publications

Density functional theory studies of HCOOH decomposition on Pd(111)

Density functional theory studies of HCOOH decomposition on Pd(111)

Reduction reaction analysis of nanoparticle copper oxide for copper direct bonding using formic acid

Growth of highly crystalline nickel particles by diffusional capture of atoms

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