Ultralow-loading platinum-cobalt fuel cell catalysts derived from imidazolate frameworks
2018; American Association for the Advancement of Science; Volume: 362; Issue: 6420 Linguagem: Inglês
10.1126/science.aau0630
ISSN1095-9203
AutoresLina Chong, Jianguo Wen, Joseph Kubal, Fatih G. Sen, Jianxin Zou, Jeffery P. Greeley, Maria K. Y. Chan, Heather M. Barkholtz, Wenjiang Ding, Di‐Jia Liu,
Tópico(s)Advanced battery technologies research
ResumoCombine and conquer Platinum (Pt)–group metals, which are scarce and expensive, are used for the demanding oxygen reduction reaction (ORR) in hydrogen fuel cells. One competing approach for reducing their use is to create nanoparticles with earth-abundant metals to increase their activity and surface area; another is to replace them with metals such as cobalt (Co) in carbide or nitride sites. Chong et al. thermally activated a Co metal-organic framework compound to create ORR-active Co sites and then grew PtCo alloy nanoparticles on this substrate. The resulting catalyst had high activity and durability, despite its relatively low Pt content. Science , this issue p. 1276
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