Morphological features of electrodeposited Pt nanoparticles and its application as anode catalysts in polymer electrolyte formic acid fuel cells

Jeon, Hongrae; Joo, Jiyong; Kwon, Young-Hyuk; Uhm, Sunghyun; Lee, Jae Kwang

doi:10.1016/j.jpowsour.2010.03.009

Cited by 30 publications

(19 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As the applied voltage was increased, the Pt particles became round with as mooth surface. The bulky dendrite, which is generally formed under mass transport-limited conditions, [12] was formed at À0.2 V ( Figure 1a), and pyramidal structuresw ere formed at À0.1 and 0V (Figure 1b and c). Under the appliedv oltage of + 0.1 V, Pt particles appeared to have ac auliflower-like structure (Figure1d); round particlesw ith smooth surfaces were obtained at 0.2 V (Figure 1e).…”

Section: Resultsmentioning

confidence: 99%

“…After the catalyst ink was ultrasonicated for at least 20 min, an aliquot (6.41 mL) of the ink was dropped onto aglassy carbon disk electrode (GC, 0.196 cm 2 )using amicropipette, which gave ac atalyst loading of 60 mgcm À2 .I na ddition, electrodeposition of Pt on plain carbon paper (TGPH-060, E-TEK) was performed at various constant voltages ranging from À0.2 to 0.2 V( vs. Ag/AgCl) in HClO 4 (0.5 m, Sigma-Aldrich) containing H 2 PtCl 6 (10 mm, Sigma-Aldrich) and Pb 3 (CH 3 COO) 2 (0.2 mm, Junsei). [12,23,24] The amount of electodeposited Pt was kept at 1.0 mg cm À2 .T he optimum electrodeposition conditions were determined using CVs of electrodeposited Pt at various voltages. The electrodeposited Pt electrodes were characterized using SEM (Hitachi, S-4700) and XRD (Rigacku, Miniflex II).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Alkaline Ammonia Electrolysis on Electrodeposited Platinum for Controllable Hydrogen Production

2015

Self Cite

View full text Add to dashboard Cite

Ammonia is beginning to attract a great deal of attention as an alternative energy source carrier, because clean hydrogen can be produced through electrolytic processes without the emission of COx . In this study, we deposited various shapes of Pt catalysts under potentiostatic mode; the electrocatalytic oxidation behavior of ammonia using these catalysts was studied in alkaline media. The electrodeposited Pt was characterized by both qualitative and quantitative analysis. To discover the optimal structure and the effect of ammonia concentration, the bulk pH value, reaction temperature, and applied current of ammonia oxidation were investigated using potential sweep and galvanostatic methods. Finally, ammonia electrolysis was conducted using a zero-gap cell, producing highly pure hydrogen with an energy efficiency over 80 %.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Alkaline Ammonia Electrolysis on Electrodeposited Platinum for Controllable Hydrogen Production

2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…[59,60] Electrodeposition is an old technique for coating am etal layer onto ac onductive substrate by applying an electrochemical potential. [59,60] Electrodeposition is an old technique for coating am etal layer onto ac onductive substrate by applying an electrochemical potential.…”

Section: Angewandte Chemiementioning

confidence: 99%

“…In this context, electrodeposition techniques provide aw ay to create such structures of catalytic electrodes and particles,s electively interconnected to void and electrolyte phases. [59,60] Electrodeposition is an old technique for coating am etal layer onto ac onductive substrate by applying an electrochemical potential. It is ab ottom up synthesis approach that can be used for catalyst preparation.…”

Section: Angewandte Chemiementioning

confidence: 99%

Electrode Architecture in Galvanic and Electrolytic Energy Cells

2016

Self Cite

View full text Add to dashboard Cite

Electrodes in galvanic and electrolytic energy cells are complicated structures comprising redox-active materials, ionic/electronic conductors, and porous pathways for mass transfer of reactants. In contrast to breakthroughs in component development, methods of optimizing whole-system architectural design to draw maximum output have not been well explored. In this Minireview, we introduce generalized types of electrode architecture, discuss fabrication strategies, and characterize already built structures. Systematic efforts to discover optimal electrode configurations will resolve long-standing discrepancies that arise between whole systems and the sums of their parts for a number of electrochemical reactions and technologies.

show abstract

“…Pt has been frequently studied as an effective catalyst for the electro-oxidation of methanol and formic acid [3,4]. However, it is well-known that platinum surface can be easily poisoned by CO-like intermediates generated during methanol and formic acid oxidation, which lead to the rapid loss of catalytic activity [5,6].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Platinum‐Poly(O‐dihydroxybenzene) Composite Catalyst and Its Electrocatalytic Activity Toward Methanol and Formic Acid Oxidation

et al. 2012

View full text Add to dashboard Cite

A composite catalyst has been successfully prepared by dispersing Pt nanoparticles on a poly(o‐dihydroxybenzene) (PoDHB) modified glassy carbon (GC) electrode and characterized by SEM, EDX, and electrochemical analysis. Compared with Pt nanoparticles deposited on the bare GC, the Pt/PoDHB/GC exhibits higher catalytic activity and stronger poisoning tolerance for electro‐oxidation of methanol and formic acid. The enhanced performance could be attributed to the increase of electrochemical active surface area (EASA) arisen from the PoDHB modification. Furthermore, performance limiting factors such as platinum loading, polymer mass, H2SO4, methanol, and formic acid concentrations have been evaluated for optimizing the electrocatalytic activities.

show abstract

Morphological features of electrodeposited Pt nanoparticles and its application as anode catalysts in polymer electrolyte formic acid fuel cells

Cited by 30 publications

References 26 publications

Alkaline Ammonia Electrolysis on Electrodeposited Platinum for Controllable Hydrogen Production

Alkaline Ammonia Electrolysis on Electrodeposited Platinum for Controllable Hydrogen Production

Electrode Architecture in Galvanic and Electrolytic Energy Cells

Preparation of Platinum‐Poly(O‐dihydroxybenzene) Composite Catalyst and Its Electrocatalytic Activity Toward Methanol and Formic Acid Oxidation

Contact Info

Product

Resources

About