Stable palladium hydride as a superior anode electrocatalyst for direct formic acid fuel cells

Zhang, Jiawei; Chen, Meishan; Li, Huiqi; Li, Yongjian; Ye, Jinyu; Cao, Zhenming; Fang, Mujin; Kuang, Qin; Zheng, Jun; Xie, Zhaoxiong

doi:10.1016/j.nanoen.2017.11.075

Cited by 138 publications

(108 citation statements)

References 45 publications

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“…Direct formic acid fuel cells (DFAFCs) are ap romising clean energy conversion device with the distinct merits of high power density,l ower fuel crossover,a nd low toxicity. [1] Developing efficient electrocatalysts for the anodic formic acido xidation reaction( FAOR) and the cathodic oxygen reductionr eaction (ORR) is an essential step for the development of DFAFCs. [2] At present, the noble metal platinum is the most commonly used catalyst for both FAOR and ORR.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

et al. 2018

Chemistry An Asian Journal

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The facile preparation of platinum-based catalysts with designed compositions and structures is of great importance for fuel cells. In this work, a one-pot method is developed to synthesize monodispersed trimetallic PtPdCo mesoporous nanoparticles (PtPdCo MNs) with uniform morphology and size. The proposed synthetic method does not require any hard template or organic solvent, which greatly simplifies the preparation procedure. PtPdCo MNs, with a highly porous structure, exhibit enhanced electrocatalytic activities and excellent stabilities for both the formic acid oxidation reaction and the oxygen reduction reaction, relative to bimetallic PtPd MNs and commercial Pt/C catalyst. The proposed synthetic method is highly valuable for the design of mesoporous multimetallic catalysts for fuel cells.

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Section: Introductionmentioning

confidence: 99%

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

et al. 2018

Chemistry An Asian Journal

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“…Furthemore, the small shake‐up peak at 6.2 eV in np‐PdH 0.43 implies interaction between the Pd 4d and H 1s states . Besides, the shift of main emission body for PdH 0.43 indicates the reduced density of states at the Fermi energy, which is caused by the insertion of H into the Pd lattice . Moreover, Fourier transform infrared (FTIR) spectroscopy (Supporting Information, Figure S6) suggests effective removal of residual DMF from the synthesized np‐PdH 0.43 .…”

Section: Figurementioning

confidence: 99%

Nanoporous Palladium Hydride for Electrocatalytic N₂ Reduction under Ambient Conditions

Fan

Chen

et al. 2020

Angewandte Chemie

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The electrocatalytic nitrogen reduction reaction (NRR) is an alternative eco‐friendly strategy for sustainable N2 fixation with renewable energy. However, NRR suffers from sluggish kinetics owing to difficult N2 adsorption and N≡N cleavage. Now, nanoporous palladium hydride is reported as electrocatalyst for electrochemical N2 reduction under ambient conditions, achieving a high ammonia yield rate of 20.4 μg h−1 mg−1 with a Faradaic efficiency of 43.6 % at low overpotential of 150 mV. Isotopic hydrogen labeling studies suggest the involvement of lattice hydrogen atoms in the hydride as active hydrogen source. In situ Raman analysis and density functional theory (DFT) calculations further reveal the reduction of energy barrier for the rate‐limiting *N2H formation step. The unique protonation mode of palladium hydride would provide a new insight on designing efficient and robust electrocatalysts for nitrogen fixation.

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“…An ECSA measurement was carried out under similar operating conditions and evaluated using a similar setup to the CV. The ECSA values were calculated by the equation, ECSA = Q/q 0 , where Q is the electric charge calculated from under the graph area at a room temperature of 26 • C in saturated nitrogen of a 0.5 M sulfuric acid solution and the q 0 is 420 µC cm −2 [20].…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

The Origins of the High Performance of Pd Catalysts Supported on Carbon Black-Embedded Carbon Nanofiber for Formic Acid Oxidation

et al. 2019

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In this study, we developed a carbon black (CB)-embedded carbon nanofiber (CNF) as a Pd support, which showed a high level of formic acid oxidation reaction (FAOR) activity. For the support preparation, heat treatment involving calcination at 1000 °C in a nitrogen atmosphere (carbonization) followed by calcination at 850 °C in water vapor (steam activation) was conducted to form a CB, which contained carbon nanofibers made from a polyacrolynitrile (PAN) fiber prepared by electrospinning. This catalyst showed a high level of FAOR activity. In this situation, the CB was also heat-treated, therefore, it was unclear whether the origin of the high FAOR activity of the CB-embedded CNF was caused by the CNF itself or the heat treatment of the CB. In order to establish the cause of the high FAOR activity of the CB-embedded CNF, the CBs underwent several heat treatments; i.e., stabilization, carbonization, and steam activation. Two types of carbon black with different pore structures, i.e., Ketjen black and Vulcan XC-72, were used to investigate the FAOR activity. The appropriate heat treatment of the CB promotes the improved FAOR activity; however, excessive heat treatment caused a deterioration in the FAOR activity, especially for Ketjen due to the presence of numerous micropores. However, by embedding the CB into the CNF, the FAOR activity improved, especially in the case of Ketjen, even though the embedded CB underwent several heat treatments. The optimum ratio of CB/PAN in the CB-embedded CNF was also investigated. The highest FAOR activity was observed at 0.25 CB/PAN for both the Vulcan and Ketjen. The electronic state of Pd3d in which the binding energy of the metallic Pd shifted to a lower binding energy suggested that the metal–support interaction is strong at the CB/PAN ratio of 0.25. On the basis of these results, it was found that heat treatment of the CB by embedding it in the CNF is a promising way to achieve a metal–support interaction without destroying its structure.

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Stable palladium hydride as a superior anode electrocatalyst for direct formic acid fuel cells

Cited by 138 publications

References 45 publications

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

Nanoporous Palladium Hydride for Electrocatalytic N₂ Reduction under Ambient Conditions

The Origins of the High Performance of Pd Catalysts Supported on Carbon Black-Embedded Carbon Nanofiber for Formic Acid Oxidation

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Stable palladium hydride as a superior anode electrocatalyst for direct formic acid fuel cells

Cited by 138 publications

References 45 publications

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

Enhanced Dual Fuel Cell Electrocatalysis with Trimetallic PtPdCo Mesoporous Nanoparticles

Nanoporous Palladium Hydride for Electrocatalytic N2 Reduction under Ambient Conditions

The Origins of the High Performance of Pd Catalysts Supported on Carbon Black-Embedded Carbon Nanofiber for Formic Acid Oxidation

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Nanoporous Palladium Hydride for Electrocatalytic N₂ Reduction under Ambient Conditions