Iron Single Atoms on Graphene as Nonprecious Metal Catalysts for High‐Temperature Polymer Electrolyte Membrane Fuel Cells
Hits:
Release time:2022-02-21 Impact Factor:16.806 DOI number:10.1002/advs.201802066 Journal:Adv. Sci. Key Words:高载量非贵金属单原子催化剂 Abstract:Iron single atom catalysts (Fe SACs) are the best-known nonprecious metal (NPM) catalysts for the oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs), but their practical application has been constrained by the low Fe SACs loading (<2 wt%). Here, a one-pot pyrolysis method is reported for the synthesis of iron single atoms on graphene (FeSA-G) with a high Fe SAC loading of ≈7.7 ± 1.3 wt%. The as-synthesized FeSA-G shows an onset potential of 0.950 V and a half-wave potential of 0.804 V in acid electrolyte for the ORR, similar to that of Pt/C catalysts but with a much higher stability and higher phosphate anion tolerance. High temperature SiO2 nanoparticle-doped phosphoric acid/polybenzimidazole (PA/PBI/SiO2) composite membrane cells utilizing a FeSA-G cathode with Fe SAC loading of 0.3 mg cm−2 delivers a peak power density of 325 mW cm−2 at 230 °C, better than 313 mW cm−2 obtained on the cell with a Pt/C cathode at a Pt loading of 1 mg cm−2. The cell with FeSA-G cathode exhibits superior stability at 230 °C, as compared to that with Pt/C cathode. Our results provide a new approach to developing practical NPM catalysts to replace Pt-based catalysts for fuel cells. Indexed by:Journal paper Volume:6 Issue:10 Page Number:1802066 Translation or Not:no Date of Publication:2019-03-13 Links to published journals:https://onlinelibrary.wiley.com/doi/full/10.1002/advs.201802066 -
|
 Zip Code:c576f0c85848a14d10428d1b79269fc7d68bde9ba6ecb95648b168a03671c3821c778c2bedf0cae5d03c95a065c3a5efa4243241acb9eb6089885db6f9f3fa7f5b7491eb5af48e7ab43d253e29e0fa6991b0af260ac98903cc7fbca150cb2fc86cb6bd41d95f78a263ba3d6f6aa504ee56cdd8693f2e6f13b576940cee3633de Postal Address:2d76dd1b17f33191b32a8fb01e602e3a9acc24ab9ff8633bceaface2762fdf181099b74d21933a6b764ecf3f963bf0111f60dfb22b6a44c504ca295b895239e264a94da7439d24fe600be5675931c404a7b735c1028445b959bd3b7906fdab9cd6a3531f2cf3d03b7276b5ae31d12846d462153436175090446fb56b7922d348 Mobile:5ac9ff840716286a408af95d091cedf09aad1cf580be50cdfe5c4db7baffdfceddb90f7f1624d06087bb44702017e2a49b05916cebbd167ad87b5d0bd36aaa9ebd44ecc7816ddd383eaaed06bb3889fc5b2fdfbd352a3ba6e86d9caf19ac8dfb3d15f9386a70bd1d092d30e86952c0892723ea77c8aae902cea44e51d0091e9e Email:192cb9a8a91b58fc4c9bc6ad8f2353bc803e22fa587a2b1343f7dee49bd2510c0d577f74ba2fa8ca027034c7f2b9b1faaddde9274b54ebf74855e004c8a22723ece4300d9a73c2b23e8b7cb40c2a6ea69afb3a104e2d674b244aca7ce76c3a5403200528ccd468969853f54068bfd849177fc3b16d879b5d65c6f317b1f638f9
|
MOBILE Version