Realization of the dehydrogenation pathway of formic acid oxidation by ultra-small core–shell Au–Pt nanoparticles with discrete Pt shells

Cao, Yi; Zhang, Xiang; Yue, Xinru; Zhang, Mengmeng; Du, Wei; Xia, Haibing

doi:10.1039/d1ma01204e

Cited by 6 publications

(10 citation statements)

References 35 publications

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“…The main source of the electrical energy in a DFAFC is electrooxidation reaction of formic acid at the anode side. It is well established now that the electrooxidation of the formic acid takes place via a dual pathway including either a direct pathway (dehydrogenation) or indirect pathway (dehydration) [21,41,42] . The two mechanisms were first proposed by Capon and Parson in 1973 [43–45] .…”

Section: Fundamentals Of Fao Reactionmentioning

confidence: 99%

Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cells – Part I – Fundamentals and Pd Based Catalysts

Hossain

Saleem

Alwi

et al. 2022

The Chemical Record

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Direct formic acid fuel cells (DFAFCs) have gained immense importance as a source of clean energy for portable electronic devices. It outperforms other fuel cells in several key operational and safety parameters. However, slow kinetics of the formic acid oxidation at the anode remains the main obstacle in achieving a high power output in DFAFCs. Noble metal‐based electrocatalysts are effective, but are expensive and prone to CO poisoning. Recently, a substantial volume of research work have been dedicated to develop inexpensive, high activity and long lasting electrocatalysts. Herein, recent advances in the development of anode electrocatalysts for DFAFCs are presented focusing on understanding the relationship between activity and structure. This review covers the literature related to the electrocatalysts based on noble metals, non‐noble metals, metal‐oxides, synthesis route, support material, and fuel cell performance. The future prospects and bottlenecks in the field are also discussed at the end.

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Section: Fundamentals Of Fao Reactionmentioning

confidence: 99%

Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cells – Part I – Fundamentals and Pd Based Catalysts

Hossain

Saleem

Alwi

et al. 2022

The Chemical Record

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show abstract

“…The electrooxidation of formic acid occurs via a dual pathway, including a direct (dehydrogenation) or indirect (dehydration) pathway. [27,44,45] The two mechanisms were first proposed by Capon and Parson in 1973. [46][47][48] In the direct or dehydrogenation mechanism, formic acid is first adsorbed on the metal surface, forming an active intermediate and eventually produces CO 2 .…”

Section: Mechanism Of Fao Reaction Over Ptmentioning

confidence: 99%

“…CA results also confirm the high stability. [45] PtAu alloy NP-supported carbon materials, such as carbon, [91] carbon nanotubes, [92,93] mesoporous carbon, [94,95] and graphene, [96] show high activity for FAO. Cappellari et al synthesized Au-coated Pt NPs deposited on a hierarchical porous carbon material.…”

Section: Goldmentioning

confidence: 99%

“…Cappellari et al synthesized Au-coated Pt NPs deposited on a hierarchical porous carbon material. The improvement is attributed to the [45] (Reproduced with permission from reference 45, Royal Chemical Society 2022) easy mass transfer in the porous support and facilitation of dehydrogenation pathway over PtAu NPs. [97] Fan et al synthesized high-loading (approximately 40-30 wt.%) PtAu catalysts on carbon black by ultrasound-assisted reduction without having to employ a surfactant.…”

Section: Goldmentioning

confidence: 99%

“…[79] In another paper, Zhou [146] . [45] (Reproduced with permission from reference 45, Royal Chemical Society 2020) et al studied the effect of heat treatment of the DÀ Pt3Te/C catalyst at various temperatures. They found that heat treatment at 700 °C produces high-performance catalysts with only 20 % loss of activity after 1000 cycles in an acidic environment.…”

Section: Palladium and Other Metalsmentioning

confidence: 99%

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Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cell‐II‐Platinum‐Based Catalysts

Hossain

Alwi

Saleem

et al. 2022

The Chemical Record

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Platinum-based catalysts have a long history of application in formic acid oxidation (FAO). The single metal Pt is active in FAO but expensive, scarce, and rapidly deactivates. Understanding the mechanism of FAO over Pt important for the rational design of catalysts. Pt nanomaterials rapidly deactivate because of the CO poisoning of Pt active sites via the dehydration pathway. Alloying with another transition metal improves the performance of Ptbased catalysts through bifunctional, ensemble, and steric effects. Supporting Pt catalysts on a high-surface-area support material is another technique to improve their overall catalytic activity. This review summarizes recent findings on the mechanism of FAO over Pt and Pt-based alloy catalysts. It also summarizes and analyzes binary and ternary Pt-based catalysts to understand their catalytic activity and structure relationship.

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Construction of PtAg‐on‐Au Heterostructured Nanoplates for Improved Electrocatalytic Activity of Formic Acid Oxidation

Wu,

Min,

Wang

et al. 2024

ChemNanoMat

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Direct formic acid fuel cells have attracted significant attention due to their low fuel crossover, high safety, and high theoretical power density among all proton‐exchange membrane fuel cells. Numerous efforts have been dedicated to studying formic acid oxidation, particularly in the fabrication of high‐performance electrocatalysts with economical utilization of Pt metal. In this work, we report a synthetic strategy to create PtAg dots supported on plate‐like Au nanoparticles and explore their applications in electrocatalytic formic acid oxidation. The highly dispersed nature of the catalytic Pt centers and the successful construction of PtAg−Au trimetallic interfaces makes the current nanostructure an ideal system to allow for a synergetic effect between Pt, Au, and Ag, leading to improved electrocatalysis. Compared with commercial Pt/C, our PtAg‐on‐Au heterogenous nanoplates exhibit superior mass activity, along with enhanced reaction kinetics and long‐term durability for FAOR in an acidic medium. Density functional theory (DFT) simulation results indicate that AgPtAu(111) exhibits a relatively high activity for HCOOH oxidation into CO2 among the various Au‐based catalysts. This work provides a viable strategy for constructing Pt‐based electrocatalysts with controlled Pt ensembles, offering insights into the development of fuel cell catalysts that make highly efficient use of costly noble metals.

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Realization of the dehydrogenation pathway of formic acid oxidation by ultra-small core–shell Au–Pt nanoparticles with discrete Pt shells

Abstract: In this work, ultra-small core-shell Au-Pt nanoparticles with discrete Pt shells (denoted as USCSD Au-Pt NPs) were successfully prepared by Fe(II)-assisted one-pot co-reduction of Au(III) ions and the ultra-low concentration...

Cited by 6 publications

References 35 publications

Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cells – Part I – Fundamentals and Pd Based Catalysts

Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cells – Part I – Fundamentals and Pd Based Catalysts

Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cell‐II‐Platinum‐Based Catalysts

Construction of PtAg‐on‐Au Heterostructured Nanoplates for Improved Electrocatalytic Activity of Formic Acid Oxidation

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