Fabrication of Pt/IrO2Nb2O5–rGO Electrocatalyst by Support Improvement for Oxygen Reduction Reaction

Kong, Fancong; Yang, Lixia; Liu, Jing; Ling, Ai-Xia; Shi, Maojian; Lv, Mei; Xu, Zhiqiang; Niu, Yanlian; Wang, Huiyun

doi:10.1007/s10562-019-02875-8

Cited by 6 publications

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the slow rate of oxygen reduction reaction (ORR) kinetics requires prolonged catalysis at the cathode, limiting the efficiency of PEMFCs and AFCs [3,4]. Despite their high cost and low natural abundance, precious metals like Ru-, Pd-and Pt-based materials are employed as catalysts to accelerate ORR [5][6][7] and are considered efficient catalysts for alkaline environment [8,9]. Also, the design of two electron process plays an important role in catalyst development, and has attracted significant attention [10,11].…”

Section: Introductionmentioning

confidence: 99%

Synergistic heat treatment derived hollow-mesoporous-microporous Fe–N–C-SHT electrocatalyst for oxygen reduction reaction

Jiang

Luan

Ren

et al. 2020

Microporous and Mesoporous Materials

View full text Add to dashboard Cite

Exploring an economical and efficient oxygen reduction reaction (ORR) is an essential but challenging field of study. Metal-organic frameworks (MOFs) have emerged as promising candidates for the preparation of porous catalysts. Here we propose a synergistic heat treatment (SHT) method to synthesize Fe-N-C-SHT catalyst with hierarchical porous hollow structures via a simple carbonization method by the synergistic heating of ZIF-8-Fe (ZIF-8 doped with Fe) and ZIF-67 in a tube furnace. Fe-N-C-SHT catalyst displays efficient ORR activity (half-wave potential (Ehalf) = 0.88 V versus reversible hydrogen electrode (RHE) with a loading of 0.204 mgFe-N-C-SHTcm −2 ), which is superior to that of Fe-N-C synthesized using individual heat treatment (IHT) (Ehalf = 0.84 V) and Pt/C catalyst (Ehalf = 0.86 V). We achieve enhanced catalytic properties, enhanced methanol tolerance, and long-term durability of the Fe-N-C-SHT catalyst in alkaline electrolyte. The improved ORR activity is attributed to the synergistic effect of Fe doping and optimized SHT methodology, which led to the formation of a highly porous catalyst with numerous active sites. The developed SHT method presents a novel route to fabricate Fe-N-C catalysts with hollow-mesoporous-microporous structures and high performance in ORR.

show abstract