Novel GaPtMnP Alloy Based Anodic Electrocatalyst with Excellent Catalytic Features for Direct Ethanol Fuel Cells

Abstract

Although considerable effort has been devoted to developing bifunctional electrocatalysts with enhanced atomic utilization in ethanol fuel cells, significant progress in this field has been hindered by notable drawbacks of the electrocatalysts, such as low stability, poor activity, and inefficient repeatability for multiple startup and shutdown cycles. Considering these issues herein, a novel nanosized GaPtMnP alloy anchored on N-doped multiwall carbon nanotubes (MWCNTs) is developed. The average size of the spherical GaPtMnP alloy nanoparticles is ≈3.5 nm. The atomic structure and d-band shift of Pt in the GaPtMnP alloy are demonstrated using state-of-the-art density functional theory calculations. Cyclic voltammetry analysis revealed that GaPtMnP/N-MWCNT delivered high mass and specific activities of 9.16 A mg Pt −1 and 10.4 mA cm −2 , respectively, in 0.3 m H 2 SO 4 + 0.5 m ethanol, values that are ≈13and 8-fold higher than the corresponding values for Pt/C. In addition, it exhibits long-term stability and durability even after 3000 cycles. A single cell based on the GaPtMnP/N-MWCNT anodic electrocatalyst exhibits a peak power density of 86.64 mW cm −2 , which is approximately fourfold higher than that of Pt/C at 70 °C. Furthermore, the performance of a fuel cell comprising the GaPtMnP/N-MWCNT catalyst remained constant even after multiple startup-shutdown cycles.

Bismuth Incorporation in Palladium Hydride for the Electrocatalytic Ethanol Oxidation with Enhanced CO Tolerance

“…The issues of the environment and energy have become increasingly tense in recent years, and many countries are focusing on the development and popularization of efficient and clean energy. , Direct ethanol fuel cells (DEFCs) have received extensive attention due to their low environmental impact and high energy density. , Moreover, ethanol has low toxicity and can be widely produced through crop fermentation . However, the large-scale actual application of DEFCs is still hindered by their anode catalysts with low activity and high cost. , Palladium (Pd)-based materials, as one of the candidate catalysts for the ethanol oxidation reaction (EOR), possess high catalytic activity and relatively abundant reserves. − Nevertheless, Pd-based nanocatalysts are easily poisoned and exhibit poor stability due to the surface-adsorbed reaction intermediates. , Accordingly, the reasonable construction of Pd-based catalysts aimed at excellent stability and high activity is urgently desired for the application of DEFCs.…”

“…3,4 Moreover, ethanol has low toxicity and can be widely produced through crop fermentation. 5 However, the large-scale actual application of DEFCs is still hindered by their anode catalysts with low activity and high cost. 6,7 Palladium (Pd)-based materials, as one of the candidate catalysts for the ethanol oxidation reaction (EOR), possess high catalytic activity and relatively abundant reserves.…”

New and Ultra‐Rapid Approach for Electrosynthesis of Highly Efficient Catalysts of Poly(para‐phenylenediamine) Supported Copper Oxide for Ethanol Oxidation in Alkaline Medium

“…Conjugated organic polymers (COPs) are three-dimensional semiconducting organic porous materials with a π-conjugation skeleton, with a large specific surface area, high porosity, and tunable size. [1][2][3][4][5] Generally, COPs can be synthesized by means of Sonogashira-Hagihara [6][7][8] and Yamamoto coupling. [9][10][11] However, these methods require expensive catalysts and high reagent consumption.…”

“…[32] To reduce the cost of the catalyst, the uses of non-nobles metals have also been investigated during the last decade. [33][34][35][36][37] 3 } n (MOF) and carbon cloth.. More than two days were necessary for the preparation of this nanocomposite. [38] It is important to highlight that the time economy in total synthesis is a critical issue and huge effort should be done to reduce time of synthesis .…”

Modulating In‐Plane Defective Density of Carbon Nanotubes by Graphitic Carbon Nitride Quantum Dots for Enhanced Triiodide Reduction

“…[5,[11][12][13] Among the numerous materials, nitrogen-doped (N-doped) MWCNTs have triggered widespread research in recent years since the groundbreaking work reported by Dai's group, which can provide higher electrocatalytic activity. [14][15][16][17] In detail, the larger electronegativity of the N atom (χ = 3.04) within the carbon matrix (χ = 2.55) can break the integrality of the conjugated π-structure of the carbon plane and induce the adjacent carbon atoms to be positively charged as catalytic active centers. [18][19][20][21] However, this covalent modification not only reorganizes the chemical bonds between MWCNTs and the chemical modifier, but also frequently accompanies the breaking of chemical bonds, which requires relatively high energy input due to the higher dissociation energy.…”