Electrocatalytic activities of platinum and palladium catalysts for enhancement of direct formic acid fuel cells: An updated progress

Che Ramli, Zatil Amali; Pasupuleti, Jagadeesh; Tengku Saharuddin, Tengku Shafazila; Yusoff, Yusra Nadzirah; Isahak, Wan Nor Roslam Wan; Baharudin, Luqmanulhakim; Tak Yaw, Chong; Koh, S.P.; Tiong Kiong, Sieh

doi:10.1016/j.aej.2023.06.069

Cited by 10 publications

(2 citation statements)

References 204 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Noble metals, known for their exceptional catalytic activity and stability, are introduced as dopants into metal oxide matrices to create hybrid materials with synergistic functionalities. By strategically incorporating elements like gold, platinum, or palladium into metal oxide structures, catalytic processes such as oxygen reduction reactions in fuel cells or CO 2 conversion are accelerated, owing to the unique electronic and surface properties of these metals [213,214]. Furthermore, noble metal doping can modulate the electronic band structure of metal oxides, resulting in improved charge carrier mobility and enhanced photocatalytic efficiency [215].…”

Section: Pursuit Of Efficiency: Noble Metal Dopingmentioning

confidence: 99%

Introduction and Advancements in Room-Temperature Ferromagnetic Metal Oxide Semiconductors for Enhanced Photocatalytic Performance

Sundaram,

Muniyandi,

Ethiraj

et al. 2024

ChemEngineering

View full text Add to dashboard Cite

Recent advancements in the field of room-temperature ferromagnetic metal oxide semiconductors (RTFMOS) have revealed their promising potential for enhancing photocatalytic performance. This review delves into the combined investigation of the photocatalytic and ferromagnetic properties at room temperature, with a particular focus on metal oxides like TiO2, which have emerged as pivotal materials in the fields of magnetism and environmental remediation. Despite extensive research efforts, the precise mechanism governing the interplay between ferromagnetism and photocatalysis in these materials remains only partially understood. Several crucial factors contributing to magnetism, such as oxygen vacancies and various metal dopants, have been identified. Numerous studies have highlighted the significant role of these factors in driving room-temperature ferromagnetism and photocatalytic activity in wide-bandgap metal oxides. However, establishing a direct correlation between magnetism, oxygen vacancies, dopant concentration, and photocatalysis has posed significant challenges. These RTFMOS hold immense potential to significantly boost photocatalytic efficiency, offering promising solutions for diverse environmental- and energy-related applications, including water purification, air pollution control, and solar energy conversion. This review aims to offer a comprehensive overview of recent advancements in understanding the magnetism and photocatalytic behavior of metal oxides. By synthesizing the latest findings, this study sheds light on the considerable promise of RTFMOS as effective photocatalysts, thus contributing to advancements in environmental remediation and related fields.

show abstract

Section: Pursuit Of Efficiency: Noble Metal Dopingmentioning

confidence: 99%

Introduction and Advancements in Room-Temperature Ferromagnetic Metal Oxide Semiconductors for Enhanced Photocatalytic Performance

Sundaram,

Muniyandi,

Ethiraj

et al. 2024

ChemEngineering

View full text Add to dashboard Cite

show abstract

“…The oxidation of these adsorbed carbon monoxide species is slow and the rate-determining step (Zuo et al, 2022;Steele & Heinzel, 2001). DEFCs are facing similar problems at an even higher magnitude (Zheng et al, 2020;Lamy et al, 2004), similar to DFAFCs (Ramli et al, 2023). Besides this problem, the high cost of platinum and the loss of catalytic activity are also major problems for Pt catalysts.…”

Section: Introductionmentioning

confidence: 99%

Carbon Monoxide-Resistant Anode Catalysts for Single-Cell Direct Carbon Monoxide Fuel Cells: Platinum-Ruthenium Anode Electrocatalysts

Zabihian,

Davari,

Osei-Prempeh

2023

IJRER

View full text Add to dashboard Cite

The objective of this paper is to present the results of experimentations on the state-of-the-art anode electrocatalysts and the membrane-electrode assemblies (MEAs) developed for direct carbon monoxide fuel cells (DCMFCs). The custom-made platinum-ruthenium (Pt-Ru) MEAs along with a commercial MEA were tested to evaluate the impacts of cell temperature, different types of fuel and oxidant, the flow rate of fuel and oxidant, and humidification temperature on the performance of the MEAs. It was shown that both the catalyst manufacturing process and the test procedure are repeatable. Also, it was shown that the performance of Pt-Ru cells when fueled by CO and CO-containing fuels was markedly inferior to that of hydrogen-fueled fuel cells. However, there were some promising signs that with the right catalysts and optimum operating conditions, the performance of DCMFCs can be significantly improved. It was also shown that increasing the operating temperature always improved the performance. While increasing the flow rates of the reactants improved the performance of the MEAs, there was a limit to this improvement. Furthermore, generally speaking, the performance of the MEAs was better when fed with CO rather than CO-N2 and O2 rather than air but the actual impact depended on other operating conditions.

show abstract

Influence of TiO2 coverage on activity and stability of Pd-TiO2/MWCNT-supported catalysts used in direct formic acid fuel cells

Malolepszy,

Mazurkiewicz-Pawlicka,

Stobinski

et al. 2024

J Mater Sci

View full text Add to dashboard Cite

Pd and TiO2 supported on functionalized multiwall carbon nanotubes (f-MWCNTs) catalysts were investigated in formic acid electrooxidation reaction in direct formic acid fuel cell. TiO2 (5–60 wt.% loading) on f-MWCNTs was deposited using microwave-assisted hydrothermal method. 20 wt.% of Pd was deposited on TiO2/f-MWCNTs by reduction of palladium (II) chloride salt with sodium borohydride. Catalysts’ structure and composition were characterized by XRD, STEM, HR-TEM, TGA, XPS/XAES (Pd, Ti, O spectra features, density of valence states, Auger parameters). Average crystallite size of Pd and TiO2 from XRD (3–4 nm) agrees with those by HR-TEM (3–5 nm). Low TiO2 coverages (below 32wt.%) show smaller crystallites due to increased surface hydrophilicity, higher amount of TiO2 oxygen vacancies with attached Pd nanoparticles, increased density of valence states of strong Pd–TiO2 interface. In contrary, the higher coverages indicate lower amount of Pd–O–Ti, Ti–O–C, Pd–O–C interfaces, with electron charge transfer from TiO2 to f-MWCNTs, and to Pd. Catalysts activity (40–106 mWmgPd−1) and stability (5–240 h) are enhanced at low TiO2 coverages (4–8 wt.%) due to a strong Pd-TiO2 interface on oxygen vacancies, improved electron transport and a high active surface area. Oscillatory self-cleaning mechanism of Pd is due to oxidation by -OH groups (TiO2, f-MWCNTs), and hydrogen and CO spillover.

show abstract

Electrocatalytic activities of platinum and palladium catalysts for enhancement of direct formic acid fuel cells: An updated progress

Cited by 10 publications

References 204 publications

Introduction and Advancements in Room-Temperature Ferromagnetic Metal Oxide Semiconductors for Enhanced Photocatalytic Performance

Introduction and Advancements in Room-Temperature Ferromagnetic Metal Oxide Semiconductors for Enhanced Photocatalytic Performance

Carbon Monoxide-Resistant Anode Catalysts for Single-Cell Direct Carbon Monoxide Fuel Cells: Platinum-Ruthenium Anode Electrocatalysts

Influence of TiO2 coverage on activity and stability of Pd-TiO2/MWCNT-supported catalysts used in direct formic acid fuel cells

Contact Info

Product

Resources

About