Increased interface effects of Pt Fe alloy/CeO2/C with Pt Fe selective loading on CeO2 for superior performance in direct methanol fuel cell

Chai, Zhanli; Zhang, Caixia; Wang, Hui; Bi, Xi; Bai, Ping; Wang, Xiaojing

doi:10.1016/j.ijhydene.2019.01.016

Cited by 23 publications

(8 citation statements)

References 52 publications

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“…Anode and cathode electrocatalysts play an important role in improving the efficiency of DMFC and the overall DMFC cell reaction in Equations ( 3 )–( 5 ) [ 46 ]

…”

Section: Resultsmentioning

confidence: 99%

“…Anode and cathode electrocatalysts play an important role in improving the efficiency of DMFC and the overall DMFC cell reaction in Equations ()–() [ 46 ]

\begin{equation}{\rm{C}}{{\rm{H}}_3}{\rm{OH}} + {{\rm{H}}_2}{\rm{O\ }} \to 6{\rm{H}} + 6{\rm{e}} + {\rm{C}}{{\rm{O}}_2}\ \left( {{\text{Anode reaction}}} \right)\end{equation}

\begin{equation}{{\rm{O}}_2} + 4{\rm{H}} + 4{\rm{e\ }} \to 2{{\rm{H}}_2}{\rm{O}}\ \left( {{\text{Cathode reaction}}} \right)\end{equation}

\begin{equation}2{\rm{C}}{{\rm{H}}_3}{\rm{OH}} + 3{{\rm{O}}_2} \to 2{\rm{C}}{{\rm{O}}_2} + 4{{\rm{H}}_2}{\rm{O\ }}\left( {{\text{Overall reaction}}} \right)\end{equation}

…”

Section: Resultsmentioning

confidence: 99%

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Quasihexagonal Platinum Nanodendrites Decorated over CoS₂‐N‐Doped Reduced Graphene Oxide for Electro‐Oxidation of C1‐, C2‐, and C3‐Type Alcohols

et al. 2022

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The development of efficient and highly durable materials for renewable energy conversion devices is crucial to the future of clean energy demand. Herein, cage‐like quasihexagonal structured platinum nanodendrites decorated over the transition metal chalcogenide core (CoS2)‐N‐doped graphene oxide (PtNDs@CoS2‐NrGO) through optimized shape engineering and structural control technology are fabricated. The prepared electrocatalyst of PtNDs@CoS2‐NrGO is effectively used as anodic catalyst for alcohol oxidation in direct liquid alcohol fuel cells. Notably, the prepared PtNDs@CoS2‐NrGO exhibits superior electrocatalytic performance toward alcohol oxidation with higher oxidation peak current densities of 491.31, 440.25, and 438.12 mA mgpt–1 for (methanol) C1, (ethylene glycol) C2, and (glycerol) C3 fuel electrolytes, respectively, as compared to state‐of‐the‐art Pt‐C in acidic medium. The electro‐oxidation durability of PtNDs@CoS2‐NrGO is investigated through cyclic voltammetry and chronoamperometry tests, which demonstrate excellent stability of the electrocatalyst toward various alcohols. Furthermore, the surface and adsorption energies of PtNDs and CoS2 are calculated using density functional theory along with the detailed bonding analysis. Overall, the obtained results emphasize the advances in effective precious material utilization and fabricating techniques of active electrocatalysts for direct alcohol oxidation fuel cell applications.

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“…Anode and cathode electrocatalysts play an important role in improving the efficiency of DMFC and the overall DMFC cell reaction in Equations ( 3 )–( 5 ) [ 46 ]

…”

Section: Resultsmentioning

confidence: 99%

“…Anode and cathode electrocatalysts play an important role in improving the efficiency of DMFC and the overall DMFC cell reaction in Equations ()–() [ 46 ]

\begin{equation}{\rm{C}}{{\rm{H}}_3}{\rm{OH}} + {{\rm{H}}_2}{\rm{O\ }} \to 6{\rm{H}} + 6{\rm{e}} + {\rm{C}}{{\rm{O}}_2}\ \left( {{\text{Anode reaction}}} \right)\end{equation}

\begin{equation}{{\rm{O}}_2} + 4{\rm{H}} + 4{\rm{e\ }} \to 2{{\rm{H}}_2}{\rm{O}}\ \left( {{\text{Cathode reaction}}} \right)\end{equation}

\begin{equation}2{\rm{C}}{{\rm{H}}_3}{\rm{OH}} + 3{{\rm{O}}_2} \to 2{\rm{C}}{{\rm{O}}_2} + 4{{\rm{H}}_2}{\rm{O\ }}\left( {{\text{Overall reaction}}} \right)\end{equation}

…”

Section: Resultsmentioning

confidence: 99%

Quasihexagonal Platinum Nanodendrites Decorated over CoS₂‐N‐Doped Reduced Graphene Oxide for Electro‐Oxidation of C1‐, C2‐, and C3‐Type Alcohols

et al. 2022

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“…[31,36,37] Benefiting from the strong metal-support interaction, CeO 2 nanoparticles with high concentration of oxygen vacancies can promote the catalytic activity and stability of PtÀ based electrocatalysts for glycerol oxidation reaction. [38,39] However, the ratio of glycerol to noble metal in these reports was typically high, resulting in very low glycerol conversion and product concentrations. [40] Recently, we reported the deactivation of the Pt/CNT (CNT = carbon nanotubes) catalyst by the adsorption of GLYA molecules in the thermo-catalytic glycerol oxidation process under base-free medium was overcome by the introduction of CeO 2 .…”

Section: Introductionmentioning

confidence: 91%

“…Benefiting from the strong metal‐support interaction, CeO 2 nanoparticles with high concentration of oxygen vacancies can promote the catalytic activity and stability of Pt−based electro‐catalysts for glycerol oxidation reaction [38,39] . However, the ratio of glycerol to noble metal in these reports was typically high, resulting in very low glycerol conversion and product concentrations [40] .…”

Section: Introductionmentioning

confidence: 99%

Tuning the Product Selectivity toward the High Yield of Glyceric Acid in Pt−CeO₂/CNT Electrocatalyzed Oxidation of Glycerol

Zheng

et al. 2022

ChemCatChem

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Electrocatalytic oxidation of glycerol is a highly efficient way for upgrading glycerol toward fine chemicals. Currently, electrooxidation of glycerol into the high value-added C3 products remains a big challenge because of the poor catalytic activity, low selectivity, and high cost of the noble metal catalysts, especially in the alkaline medium. Here, we report that the PtÀ CeO 2 /CNT (CNT = carbon nanotubes) catalyst remarkably promotes the conversion (86.5 % vs. 37.6 %) and recycling stability for glycerol electro-oxidation reaction, as compared with Pt/CNT. However, the improved catalytic activity of PtÀ CeO 2 /CNT is accompanied by the further oxidation of C3 products including glyceric acid (GLYA). By tuning the product distribution by the ratio of CeO 2 and CNT, applied potential, and the Pt loading amount, the high selectivities of C3 products (95 %) and GLYA (59 %) are achieved together with the high glycerol conversion (86 %), leading to the impressive yields of C3 products (81 %) and GLYA (50 %). The unique contributions of CeO 2 includes not only the enhanced catalytic activity and recycling stability, but also the suppressed further oxidation of GLYA. Moreover, higher yield of GLYA is reached over PtÀ CeO 2 / CNT even with half loading of Pt, as compared with Pt/CNT.

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“…Besides, in the case of the Ni 2p spectrum (Figure S5a), it can be deconvoluted into three types of peaks: satellite peak, Ni 0 , and Ni 2+ . Coincidentally, the Fe 2p spectrum (Figure S5b) of Pt/NiFe@N-CNT demonstrates obvious sub-peaks about the Fe-ionic state and metal Fe …”

Section: Resultsmentioning

confidence: 99%

N-Doped Carbon Nanotube Shell Encapsulating the NiFe Metal Core for Enhanced Catalytic Stability in Methanol Oxidation Reaction by the Structural Cooperation Mechanism

Xie

Gan

2022

Langmuir

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Exploitation of high-efficiency catalysts toward methanol oxidation is a pivotal step to promote the commercialization of direct methanol fuel cells. Herein, a strategy is demonstrated to prepare nitrogen-doped carbon nanotubes with NiFe metal particles (NiFe@N-CNT) as the carrier material of Pt nanoparticles. Combining SEM and TEM, NiFe metal particles are fully encapsulated in N-CNTs, and they form the metal core and carbon nanotube shell structure based on the structural cooperation mechanism. Surprisingly, the as-prepared Pt/NiFe@N-CNT catalyst shows superior catalytic activity (1023 mA mg–1 Pt) compared to commercial Pt/C (392 mA mg–1 Pt), Pt/Ni@N-CNT (331 mA mg–1 Pt), and Pt/Fe@N-CNT (592 mA mg–1 Pt). After 1000 cycles, Pt/NiFe@N-CNT maintains the optimal catalytic activity (588 mA mg–1 Pt), and its mass activity loss is 42.5%, which is better than those of commercial Pt/C (64.0%), Pt/Ni@N-CNT (67.7%), and Pt/Fe@N-CNT (59.6%) catalysts, indicating that the Pt/NiFe@N-CNT catalyst achieves excellent catalytic activity and stability, which stems chiefly from the homodispersed Pt nanoparticles and the generation of the metal core–carbon nanotube shell based on the structural cooperation mechanism. This study reports the facile construction of a metal core–carbon nanotube shell structure, which intrinsically ameliorates structural collapse of carrier material, thereby improving the catalytic stability of the Pt-based catalyst and broadening the view for design of other desire catalysts in methanol oxidation.

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Increased interface effects of Pt Fe alloy/CeO2/C with Pt Fe selective loading on CeO2 for superior performance in direct methanol fuel cell

Cited by 23 publications

References 52 publications

Quasihexagonal Platinum Nanodendrites Decorated over CoS₂‐N‐Doped Reduced Graphene Oxide for Electro‐Oxidation of C1‐, C2‐, and C3‐Type Alcohols

Quasihexagonal Platinum Nanodendrites Decorated over CoS₂‐N‐Doped Reduced Graphene Oxide for Electro‐Oxidation of C1‐, C2‐, and C3‐Type Alcohols

Tuning the Product Selectivity toward the High Yield of Glyceric Acid in Pt−CeO₂/CNT Electrocatalyzed Oxidation of Glycerol

N-Doped Carbon Nanotube Shell Encapsulating the NiFe Metal Core for Enhanced Catalytic Stability in Methanol Oxidation Reaction by the Structural Cooperation Mechanism

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Increased interface effects of Pt Fe alloy/CeO2/C with Pt Fe selective loading on CeO2 for superior performance in direct methanol fuel cell

Cited by 23 publications

References 52 publications

Quasihexagonal Platinum Nanodendrites Decorated over CoS2‐N‐Doped Reduced Graphene Oxide for Electro‐Oxidation of C1‐, C2‐, and C3‐Type Alcohols

Quasihexagonal Platinum Nanodendrites Decorated over CoS2‐N‐Doped Reduced Graphene Oxide for Electro‐Oxidation of C1‐, C2‐, and C3‐Type Alcohols

Tuning the Product Selectivity toward the High Yield of Glyceric Acid in Pt−CeO2/CNT Electrocatalyzed Oxidation of Glycerol

N-Doped Carbon Nanotube Shell Encapsulating the NiFe Metal Core for Enhanced Catalytic Stability in Methanol Oxidation Reaction by the Structural Cooperation Mechanism

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Product

Resources

About

Quasihexagonal Platinum Nanodendrites Decorated over CoS₂‐N‐Doped Reduced Graphene Oxide for Electro‐Oxidation of C1‐, C2‐, and C3‐Type Alcohols

Quasihexagonal Platinum Nanodendrites Decorated over CoS₂‐N‐Doped Reduced Graphene Oxide for Electro‐Oxidation of C1‐, C2‐, and C3‐Type Alcohols

Tuning the Product Selectivity toward the High Yield of Glyceric Acid in Pt−CeO₂/CNT Electrocatalyzed Oxidation of Glycerol