Optimization of a Perovskite Oxide-Based Cathode Catalyst Layer on Performance of Direct Ammonia Fuel Cells.
Optimization of a Perovskite Oxide-Based Cathode Catalyst Layer on Performance of Direct Ammonia Fuel Cells.
复制标题
DOI：
10.1021/acsami.2c17253
复制
发表时间：
2023-01-11
影响因子：
9.5
通讯作者：
Tao, Shanwen
中科院分区：
文献类型：
--
作者：
Jeerh, Georgina;Zou, Peimiao;Zhang, Mengfei;Tao, Shanwen
为了最大限度地提高燃料电池的性能，电子，离子和反应物的传输路径应该连接良好。这需要在催化剂层（CL）中构造良好的微结构。本文设计并优化了直接氨燃料电池（DAFC）阴极阴极CL，采用钙钛矿氧化物作为催化剂，以减少对铂族金属（PGMs）的依赖。探讨了阴极CL（CCL）中定制碳、离聚物和聚四氟乙烯（PTFE）含量的影响，并测试了几种DAFC。使用相同的催化剂和操作条件，获得的最低最大电流密度和峰值功率密度分别为85.3 mA cm-2和5.92 mW cm-2，通过适当的碳、离聚物和PTFE优化，其显著增加到317 mA cm-2和30.1 mW cm-2，说明了有效三相界面的重要性。研究结果表明，尽管就业的活性催化剂在阴极部位的氧还原，催化剂的真实性能不能反映，除非它是由适当的设计的覆铜板支持。研究还表明，通过优化CCL，类似的性能，在文献中的Pt/C基CCL可以在降低成本。
To maximize fuel cell performance, transport pathways for electrons, ions, and reactants should be connected well. This demands a well-constructed microstructure in the catalyst layer (CL). Herein we design and optimize a cathode CL for a direct ammonia fuel cell (DAFC) using a perovskite oxide as the catalyst to reduce reliance on platinum group metals (PGMs). The effects of tailoring carbon, ionomer, and polytetrafluoroethylene (PTFE) content in cathode CLs (CCLs) were explored, and several DAFCs were tested. Using the same catalyst and operating conditions, the lowest maximum current density and peak power density obtained were 85.3 mA cm–2 and 5.92 mW cm–2, respectively, which substantially increased to 317 mA cm–2 and 30.1 mW cm–2 through proper carbon, ionomer, and PTFE optimization, illustrating the importance of an effective three-phase interface. The findings reveal that despite employment of an active catalyst for oxygen reduction at the cathode site, the true performance of the catalyst cannot be reflected unless it is supported by proper design of the CCL. The study also reveals that by optimizing the CCL, similar performances to those of Pt/C-based CCLs in literature can be obtained at a cost reduction.
登录
查看更多内容
影响因子：
15
作者：
Chen, Chen;Tse, Ying-Lung Steve;Voth, Gregory A.
通讯作者：
Voth, Gregory A.
影响因子：
5.7
作者：
Dong, Dengpan;Zhang, Weiwei;Bedrov, Dmitry
通讯作者：
Bedrov, Dmitry
影响因子：
11.2
作者：
Cesaro, Zac;Ives, Matthew;Banares-Alcantara, Rene
通讯作者：
Banares-Alcantara, Rene
影响因子：
7.2
作者：
Avcioglu, Gokce S.;Ficicilar, Berker;Eroglu, Inci
通讯作者：
Eroglu, Inci
影响因子：
7.2
作者：
Assumpcao, Monica H. M. T.;da Silva, Sirlane G.;Silva, Julio Cesar M.
通讯作者：
Silva, Julio Cesar M.