Enhanced electrochemical activity and durability of a direct ammonia protonic ceramic fuel cell enabled by an internal catalyst layer

A review of progress in proton ceramic electrochemical cells: material and structural design, coupled with value-added chemical production

“…323 After treatment in NH 3 for 10 h, only a small peak of Fe 2 N was observed for the Fe–CeO x catalyst, while the cell with the Fe catalytic layer was completely converted into Fe 2 N as shown by the XRD patterns, indicating that the addition of CeO 2 prevented the reaction between Fe and NH 3 , and most of the Fe in the Fe–CeO x catalyst was preserved in the CeO 2 lattice. 323…”

“…Energy & Environmental Science with the sponge layer. 323 It is worth mentioning that the porosity of the microtubular PCEC reached 57.3% after H 2 reduction at 700 1C, as determined by the Archimedes method. 354 The peculiar multi-level pore structure prepared by the phase inversion approach enhances mass transport.…”

“…312 Subsequently, Fe incorporated into CeO 2 (Fe–CeO x ) was attempted as a catalytic layer for NH 3 , which led to higher stability than that of the Fe catalyst. 323 At 650 °C, the degradation rate of the PCEC with a Fe–CeO x (Fe : Ce ratio of 6 : 4) catalytic layer is lower than that of the Fe cell in the short-term stability test, indicating that the addition of CeO 2 could prolong the cell lifetime. 323 After treatment in NH 3 for 10 h, only a small peak of Fe 2 N was observed for the Fe–CeO x catalyst, while the cell with the Fe catalytic layer was completely converted into Fe 2 N as shown by the XRD patterns, indicating that the addition of CeO 2 prevented the reaction between Fe and NH 3 , and most of the Fe in the Fe–CeO x catalyst was preserved in the CeO 2 lattice.…”

“…312 Subsequently, a phase-inversion microtubular PCEC was fabricated with the addition of the Fe-CeO x catalytic layer. 323 The integral thickness was contained at 450-500 mm, and the porous catalyst layer (25-30 mm) was well combined…”

High‐Performance Ammonia Protonic Ceramic Fuel Cells Using a Pd Inter‐Catalyst

“…[21] In recent years, there has been a growing trend towards the development of highly active and stable ammonia decomposition catalysts for use in PCFCs that use ammonia as fuel. [22][23][24][25] Research in this area aims to improve the efficiency and performance of PCFCs by increasing the rate of electrochemical reactions that decompose ammonia into hydrogen ions and electrons. The aim of this study has been to develop catalysts that can effectively decompose ammonia under PCFC operating conditions while also exhibiting high stability and durability over time.…”