A High-Performance Gas-Fed Direct Ammonia Hydroxide Exchange Membrane Fuel Cell

Zhao, Yun; Wang, Teng; Setzler, Brian P.; Abbasi, Reza; Wang, Junhua; Yan, Yushan

doi:10.1021/acsenergylett.1c00370

Cited by 31 publications

(40 citation statements)

References 40 publications

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“…Zhao's recent work increased the peak power density of a gas-fed DAFC based on a polymer electrolyte by improving anode humidity (using a mixture of humidified N2 and dry NH3) and increasing temperature. Furthermore, the team determined that the performance loss was caused by AOR kinetics [99] using the model (polarization curves in Fig. 6(d)).…”

Section: Electrochemical Nh Oxidationmentioning

confidence: 99%

Recent advances in nanostructured heterogeneous catalysts for N-cycle electrocatalysis

Sun

Liang

Liu

et al. 2022

Nano Research Energy

344

229

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To restore the natural nitrogen cycle (N-cycle), artificial N-cycle electrocatalysis with flexibility, sustainability, and compatibility can convert intermittent renewable energy (e.g., wind) to harmful or value-added chemicals with minimal carbon emissions. The background of such N-cycles, such as nitrogen fixation, ammonia oxidation, and nitrate reduction, is briefly introduced here. The discussion of emerging nanostructures in various conversion reactions is focused on the architecture/compositional design, electrochemical performances, reaction mechanisms, and instructive tests. Energy device advancements for achieving more functions as well as in situ/operando characterizations toward understanding key steps are also highlighted. Furthermore, some recently proposed reactions as well as less discussed C-N coupling reactions are also summarized. We classify inorganic nitrogen sources that convert to each other under an applied voltage into three types, namely, abundant nitrogen, toxic nitrate (nitrite), and nitrogen oxides, and useful compounds such as ammonia, hydrazine, and hydroxylamine, with the goal of providing more critical insights into strategies to facilitate the development of our circular nitrogen economy.

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Section: Electrochemical Nh Oxidationmentioning

confidence: 99%

Recent advances in nanostructured heterogeneous catalysts for N-cycle electrocatalysis

Sun

Liang

Liu

et al. 2022

Nano Research Energy

344

229

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“…The third is Alkymer, a binder with excellent anion conductivity that was commonly applied in other anion-exchange membrane fuel cells , but never employed in AEM-DAFCs. Moreover, the multi-levels for binder content and cathode catalyst loading were developed based on the existing literature. ,,, Herein, the CCLs containing only catalyst and binder were prepared according to the orthogonal table, which took three factors (cathode catalyst loading, binder type, and binder content) and their corresponding three levels as parameters. As a result, nine groups of experiments were carried out.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Cathode Catalyst Layer for Boosting Direct Ammonia Fuel Cell Performance by Orthogonal Tests

Yang

Zhang

et al. 2023

Energy Fuels

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The design of the cathode catalyst layer (CCL) for the oxygen reduction reaction is critical to improving the performance of anion-exchange membrane-based direct ammonia fuel cells (AEM-DAFCs) due to the impact of ammonia crossover. Herein, the effects of three factors (cathode catalyst loading, binder type, and binder content) and their corresponding three levels on the CCL have been investigated to achieve optimal cell performance by the orthogonal test for the first time. CCLs are characterized by scanning electron microscopy, mercury intrusion porosimetry, and contact angle measurements, which further verify the reliability of the orthogonal test results. The results show the following order of influence on the cell performance: binder type > binder content > cathode catalyst loading. These factors affect the mass transport and the number of three-phase interfaces in the CCL by changing its thickness, surface morphology, pore structure, and hydrophobicity, thus affecting the cell performance. An AEM-DAFC with a champion peak power density (PPD) of 158.6 mW cm–2 has been achieved under the optimal combination of cathode catalyst loading (2 mg cm–2), binder type (poly(tetrafluoroethylene) (PTFE)), and binder content (15 wt %). This work provides an alternative avenue to improve the performance of AEM-DAFCs using state-of-the-art catalysts and binders through rapid optimization of the CCL structure in the future.

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“…10,[13][14][15] Recently, direct utilization of ammonia in fuel cells to generate electricity with high efficiency has been proposed and extensively studied. 2,[16][17][18][19][20][21][22] The direct ammonia fuel cell (DAFC) is an excellent alternative as an ammonia-fueled power source, especially for small-scale and domestic applications. [23][24][25] In DAFCs, the ammonia 4 oxidation reaction (AOR) occurs at the anode and oxygen reduction reaction (ORR) at the cathode.…”

Section: Introductionmentioning

confidence: 99%

A symmetric direct ammonia fuel cell using ternary NiCuFe alloy embedded in a carbon network as electrodes

Zhang

Jeerh

et al. 2022

J. Mater. Chem. A

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A High-Performance Gas-Fed Direct Ammonia Hydroxide Exchange Membrane Fuel Cell

Cited by 31 publications

References 40 publications

Recent advances in nanostructured heterogeneous catalysts for N-cycle electrocatalysis

Recent advances in nanostructured heterogeneous catalysts for N-cycle electrocatalysis

Optimization of the Cathode Catalyst Layer for Boosting Direct Ammonia Fuel Cell Performance by Orthogonal Tests

A symmetric direct ammonia fuel cell using ternary NiCuFe alloy embedded in a carbon network as electrodes

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