Facile Enhancement in CO-Tolerance of a Polymer-Coated Pt Electrocatalyst Supported on Carbon Black: Comparison between Vulcan and Ketjenblack

Yang, Zehui; Kim, Chae Rin; Hirata, Shinsuke; Fujigaya, Tsuyohiko; Nakashima, Naotoshi

doi:10.1021/acsami.5b03371

Cited by 52 publications

(38 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To promote MOR, electrocatalysts (e.g., Pt and its alloys in most cases) are indeed required. Besides their high prices, Pt‐based catalysts are susceptible to carbonaceous intermediates, especially CO. For example, the CO adsorption on the Pt surface is especially serious in acidic electrolytes, leading to severe poisoning effect or short life time of these catalysts towards MOR . Design and synthesis of high‐performance Pt electrocatalyst for MOR (namely maximized catalytic ability towards MOR but minimized CO poisoning effect during MOR) is thus highly demanded.…”

Section: Introductionmentioning

confidence: 99%

Atomic Carbon Layers Supported Pt Nanoparticles for Minimized CO Poisoning and Maximized Methanol Oxidation

Bai

Liu

Gao

et al. 2019

Small

View full text Add to dashboard Cite

Maximizing activity of Pt catalysts toward methanol oxidation reaction (MOR) together with minimized poisoning of adsorbed CO during MOR still remains a big challenge. In the present work, uniform and well‐distributed Pt nanoparticles (NPs) grown on an atomic carbon layer, that is in situ formed by means of dry‐etching of silicon carbide nanoparticles (SiC NPs) with CCl4 gas, are explored as potential catalysts for MOR. Significantly, as‐synthesized catalysts exhibit remarkably higher MOR catalytic activity (e.g., 647.63 mA mg−1 at a peak potential of 0.85 V vs RHE) and much improved anti‐CO poisoning ability than the commercial Pt/C catalysts, Pt/carbon nanotubes, and Pt/graphene catalysts. Moreover, the amount of expensive Pt is a few times lower than that of the commercial and reported catalyst systems. As confirmed from density functional theory (DFT) calculations and X‐ray absorption fine structure (XAFS) measurements, such high performance is due to reduced adsorption energy of CO on the Pt NPs and an increased amount of adsorbed energy OH species that remove adsorbed CO fast and efficiently. Therefore, these catalysts can be utilized for the development of large‐scale and industry‐orientated direct methanol fuel cells.

show abstract

Section: Introductionmentioning

confidence: 99%

Atomic Carbon Layers Supported Pt Nanoparticles for Minimized CO Poisoning and Maximized Methanol Oxidation

Bai

Liu

Gao

et al. 2019

Small

View full text Add to dashboard Cite

show abstract

“…Alloying Pt with cheaper metals (Co, Cu, Ni and Fe) is an effective approach for tailoring the electronic and geometric heterostructures to improve activity and stability7891011. Compared with various Pt bimetallic alloys (with Cu, Ni or Fe), the Pt-Co alloys are generally more stable due to the higher degree of alloying of cobalt and platinum312.…”

mentioning

confidence: 99%

Facile Fabrication of Platinum-Cobalt Alloy Nanoparticles with Enhanced Electrocatalytic Activity for a Methanol Oxidation Reaction

Huang

Zhang

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Decreasing the cost associated with platinum-based catalysts along with improving their catalytic properties is a major challenge for commercial direct methanol fuel cells. In this work, a simple and facile strategy was developed for the more efficient preparation of multi-walled carbon nanotube (MWCNT) -supported Pt/CoPt composite nanoparticles (NPs) via solution plasma sputtering with subsequent thermal annealing. Quite different from general wet synthesis methods, Pt/CoPt composite NPs were directly derived from metal wire electrodes without any additions. The obtained Pt/CoPt/MWCNTs composite catalysts exhibited tremendous improvement in the electro-oxidation of methanol in acidic media with mass activities of 1719 mA mg−1Pt. This value is much higher than that of previous reports of Pt-Co alloy and commercial Pt/C (3.16 times) because of the many active sites and clean surface of the catalysts. The catalysts showed good stability due to the special synergistic effects of the CoPt alloy. Pt/CoPt/MWCNTs can be used as a promising catalyst for direct methanol fuel cells. In addition, this solution plasma sputtering-assisted synthesis method introduces a general and feasible route for the synthesis of binary alloys.

show abstract

“…And N 1s peaks were detected at 400 eV coming from the PyPBI shown in Fig. 3b2531323334. Not surprisingly, the P 2p peaks were found at 132 eV shown in Fig.…”

Section: Resultsmentioning

confidence: 84%

“…To the best of our knowledge, this is the first study of Pd used in high-temperature PEFC. Finally the lower durability of the Pd electrocatalyst was enhanced by poly(vinylphosphonic acid) coating reported previously21242526.…”

mentioning

confidence: 61%

High Performance Palladium Supported on Nanoporous Carbon under Anhydrous Condition

Yang

Ying

Zhang

et al. 2016

Sci Rep

Self Cite

View full text Add to dashboard Cite

Due to the high cost of polymer electrolyte fuel cells (PEFCs), replacing platinum (Pt) with some inexpensive metal was carried out. Here, we deposited palladium nanoparticles (Pd-NPs) on nanoporous carbon (NC) after wrapping by poly[2,2′-(2,6-pyridine)-5,5′-bibenzimidazole] (PyPBI) doped with phosphoric acid (PA) and the Pd-NPs size was successfully controlled by varying the weight ratio between Pd precursor and carbon support doped with PA. The membrane electrode assembly (MEA) fabricated from the optimized electrocatalyst with 0.05 mgPd cm−2 for both anode and cathode sides showed a power density of 76 mW cm−2 under 120 °C without any humidification, which was comparable to the commercial CB/Pt, 89 mW cm−2 with 0.45 mgPt cm−2 loaded in both anode and cathode. Meanwhile, the power density of hybrid MEA with 0.45 mgPt cm−2 in cathode and 0.05 mgPd cm−2 in anode reached 188 mW cm−2. The high performance of the Pt-free electrocatalyst was attributed to the porous structure enhancing the gas diffusion and the PyPBI-PA facilitating the proton conductivity in catalyst layer. Meanwhile, the durability of Pd electrocatalyst was enhanced by coating with acidic polymer. The newly fabricated Pt-free electrocatalyst is extremely promising for reducing the cost in the high-temperature PEFCs.

show abstract

Facile Enhancement in CO-Tolerance of a Polymer-Coated Pt Electrocatalyst Supported on Carbon Black: Comparison between Vulcan and Ketjenblack

Cited by 52 publications

References 54 publications

Atomic Carbon Layers Supported Pt Nanoparticles for Minimized CO Poisoning and Maximized Methanol Oxidation

Atomic Carbon Layers Supported Pt Nanoparticles for Minimized CO Poisoning and Maximized Methanol Oxidation

Facile Fabrication of Platinum-Cobalt Alloy Nanoparticles with Enhanced Electrocatalytic Activity for a Methanol Oxidation Reaction

High Performance Palladium Supported on Nanoporous Carbon under Anhydrous Condition

Contact Info

Product

Resources

About