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A high performance non-noble metal electrocatalyst for the oxygen reduction reaction derived from a metal organic framework 被引量:6
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作者 白杨芝 衣宝廉 +4 位作者 李佳 蒋尚峰 张洪杰 邵志刚 宋玉江 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第7期1127-1133,共7页
The development of a non-precious metal electrocatalyst (NPME) with a performance superior to commercial Pt/C for the oxygen reduction reaction (ORR) is important for the commercialization of fuel cells. We report... The development of a non-precious metal electrocatalyst (NPME) with a performance superior to commercial Pt/C for the oxygen reduction reaction (ORR) is important for the commercialization of fuel cells. We report the synthesis of a NPME by heat-treating Co-based metal organic frameworks (ZIF-67) with a small average size of 44 nm. The electrocatalyst pyrolyzed at 600 ~C showed the best performance and the performance was enhanced when it was supported on BP 2000. The resulting electrocatalyst was composed of 10 nm Co nanoparticles coated by 3-12 layers of N doped graphite layers which as a whole was embedded in a carbon matrix. The ORR performance of the electrocatalyst was tested by rotating disk electrode tests in O2-saturated 0.1 mol/L KOH under ambient conditions. The electrocatalyst (1.0 mg/cm~] showed an onset potential of 1.017 V ([vs. RHE] and a half-wave potential of 0.857 V (vs. RHE], which showed it was as good as the commer- cial Pt/C (20 BgPt/cm2). Furthermore, the electrocatalyst possessed much better stability and re- sistance to methanol crossover than Pt/C. 展开更多
关键词 Fuel cellOxygen reduction reactionNon-precious metal catalystMetal organic frameworkAlkaline condition
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