Significant promotion effect of Fe3O4 on the mass catalytic activity of Pd nanocatalyst for the formic acid oxidation reaction

Meléndez-González, P. C.; Carrillo-Rodríguez, J.C.; Morales-Acosta, D.; Mukherjee, Sritama; Rodríguez-Varela, F.J.

doi:10.1016/j.ijhydene.2017.07.172

Cited by 9 publications

(7 citation statements)

References 24 publications

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“…The oxidation of formic acid on Pd proceeds either through direct pathway involving adsorbed HCOOH ad or via formate pathway. − Direct pathway involves eq . On the other hand, the formate pathway involves the following steps (eqs –) The electrocatalytic performance of the dealloyed catalysts toward FAOR was examined by cyclic voltammetric measurements in 0.5 M H 2 SO 4 . Figure A displays the electrocatalytic FAOR activity of dealloyed Co x Cu y Pd z catalysts.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Dealloying-Assisted Surface-Engineered Pd-Based Bifunctional Electrocatalyst for Formic Acid Oxidation and Oxygen Reduction

Mondal

Raj

2019

ACS Appl. Mater. Interfaces

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Synthesis of non-Pt bifunctional electrocatalyst for the anodic oxidation of liquid fuel and cathodic reduction of oxygen is of great interest in the development of energy conversion devices. We demonstrate a facile room-temperature synthesis of surface-engineered trimetallic alloy nanoelectrocatalyst based on Co, Cu, and Pd by thermodynamically favorable transmetallation reaction and electrochemical dealloying. The quasi-spherical Co x Cu y Pd z trimetallic catalysts were synthesized by the thermodynamically favorable reaction of K 2 PdCl 4 with sheetlike Co m Cu n bimetallic alloy nanostructure. The surface engineering of Co x Cu y Pd z was achieved by electrochemical dealloying. The surface-engineered alloy electrocatalyst exhibits excellent bifunctional activity toward formic acid oxidation reaction (FAOR) and oxygen reduction reaction (ORR) at same pH. The elemental composition and lattice strain control the electrocatalytic performance. The elemental composition-dependent compressive strain weakens the adsorption of oxygen-containing species and favors the facile electron transfer for FAOR and ORR. The engineered alloy electrocatalyst of Co 0.02 Cu 13.8 Pd 86.18 composition is highly durable and delivers high mass-specific activity for ORR and FAOR. It delivers mass-specific activities of 1.50 and 0.202 A/mg Pd for FAOR and ORR, respectively, in acidic pH. The overall performance is superior to that of as-synthesized Pd and dealloyed bimetallic Co 2.7 Pd 97.3 and Cu 5.61 Pd 94.39 nanoelectrocatalysts.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Dealloying-Assisted Surface-Engineered Pd-Based Bifunctional Electrocatalyst for Formic Acid Oxidation and Oxygen Reduction

Mondal

Raj

2019

ACS Appl. Mater. Interfaces

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“…Hydroxoyl ions oxidizes the Pd−HCOO− to free Pd for further oxidation. Moreover, electronic effect of addition of Fe3O4 also positively affects the catalysts [247] . Our group has reported the ordered mesoporous carbon modified with WO 3 [267] and CeO 2 [268] as support material.…”

Section: Anode Catalysts For Formic Acid Oxidationmentioning

confidence: 93%

“…Transition metal oxides are excellent material for use as co catalyst or promoter to monometallic or bimetallic Pd based catalysts for the oxidation of formic acid. [246] It has been found that the addition of iron oxide, [247] europium oxide, [248] molybdenum oxide, [249] cerium oxide, [250][251][252] tungsten oxide, [253,254] lead oxide, [255] zirconium oxide, [256] lanthanum oxide [257] to Pd noble metal enhanced the catalytic activity and stability of the catalyst. Tungsten oxide (WO 3 ) has been extensively studied as co catalysts for the Pd or Pt noble metals and modifier for the support material for different types of PEMFCs fuel cells (methanol, formic acid and ethanol).…”

Section: Pd Transition Metal Oxides Based Catalystsmentioning

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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“…The MPD obtained for a single cell was 2.85 and 2.65 times higher than Pt/C and Pd black, respectively (M. Choi et al, 2019). Doping noble metals with metal oxides like Fe 3 O 4 and CeO 2 is beneficial because they are found to act as oxygen buffers to provide OH species at relatively low overpotentials and promote oxidation of adsorbed CO to CO 2 (Altamirano‐Gutiérrez et al, 2015; Habibi & Delnavaz, 2015; Meléndez‐González et al, 2017).…”

Section: Anode Electrocatalystsmentioning

confidence: 99%

“…Various metals, metal oxides, metal phosphides, metal nitrides as well as heteroatom-doped metals are widely reported as cocatalysts. These can modify the electronic structure of nanoparticles through interfacial bonding or electron transfer between cocatalysts and metallic sites (Meléndez-Gonz alez et al, 2017).…”

Section: Noble Metal Decoration On Cocatalystsmentioning

confidence: 99%

Recent advances in electrocatalysts, mechanism, and cell architecture for direct formic acid fuel cells

Bhaskaran

Abraham²,

Chetty³

2021

WIREs Energy & Environment

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Direct formic acid fuel cells (DFAFCs) are potential candidates as power sources for various applications, especially in portable electronics and medical diagnostic devices. Though they have been the subject of considerable research, commercial prototypes of DFAFCs are rudimentary compared to other liquid fuel cells, particularly the widespread methanol‐based direct methanol fuel cells. Various strategies for rationally engineering the electrocatalysts for enhancing DFAFC performance have been explored in the last few years, such as alloying noble metals with earth‐abundant transition metals, designing specific morphological and structural arrangements, decorating the surface with corrosion‐tolerant cocatalysts, and providing better catalyst support for effective catalyst dispersion. An overall approach may be necessary and should include (i) understanding the underlying mechanism, which will guide the direction of catalyst engineering, (ii) employing morphological, compositional, and structural control of the electrocatalysts to improve catalyst utilization and enhance the intrinsic activity for real‐world applications, and (iii) integrating these in a proficiently designed cell architecture suitable for targeted applications. In this review, we focus on the recent advances in electrocatalysts, formic acid electrooxidation mechanisms, and DFAFC cell architectures, which could help address the opportunities and challenges of commercializing DFAFC as a prospective alternative power source for portable applications. This article is categorized under: Fuel Cells and Hydrogen > Science and Materials Energy Research & Innovation > Science and Materials

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Significant promotion effect of Fe3O4 on the mass catalytic activity of Pd nanocatalyst for the formic acid oxidation reaction

Cited by 9 publications

References 24 publications

Electrochemical Dealloying-Assisted Surface-Engineered Pd-Based Bifunctional Electrocatalyst for Formic Acid Oxidation and Oxygen Reduction

Electrochemical Dealloying-Assisted Surface-Engineered Pd-Based Bifunctional Electrocatalyst for Formic Acid Oxidation and Oxygen Reduction

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

Recent advances in electrocatalysts, mechanism, and cell architecture for direct formic acid fuel cells

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