High electronic conductivity of the support material and uniform distribution of the catalyst nanoparticles (NPs) are extremely desirable for electrocatalysts. In this paper, we present our recent progress on electrocatalysts for fuel cells with simultaneously improved conductivity of the supporting carbon nanofibers (CNFs) and distribution of platinum (Pt) NPs through facile incorporation of graphene nanoribbons (GNRs). Briefly, GNRs were obtained by the cutting and unzipping of multiwalled carbon nanotubes (MWCNTs) and subsequent thermal reduction and were first used as novel nanofillers in CNFs towards high performance support material for electrocatalysis. Through electrospinning and carbonization processes, GNR embedded carbon nanofibers (G–CNFs) with greatly enhanced graphitization and electronic conductivity were synthesized. Chemical deposition of Pt NPs onto G–CNFs generated a new Pt–G–CNF hybrid catalyst, with homogeneously distributed Pt NPs of ∼3 nm. Compared to Pt–CNF (Pt on pristine CNFs) and Pt–M–CNF (Pt on MWCNT embedded CNFs), Pt–G–CNF hybrids exhibit significantly improved electrochemically active surface area (ECSA), better CO tolerance for electro-oxidation of methanol and higher electrochemical stability, testifying G–CNFs are promising support materials for high performance electrocatalysts for fuel cells.

中文翻译：

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石墨烯纳米带杂化碳纳米纤维：显着增强的石墨化和导电性，以及作为燃料电池催化剂载体材料的出色性能†

载体材料的高电子电导率和催化剂纳米颗粒（NPs）的均匀分布是电催化剂极为需要的。在本文中，我们介绍了燃料电池电催化剂的最新进展，同时通过方便地掺入石墨烯纳米带（GNR）同时提高了支撑碳纳米纤维（CNF）的电导率和铂（Pt）NP的分布。简而言之，GNR是通过切割和解开多壁碳纳米管（MWCNT）并随后进行热还原而获得的，它们首先在CNF中用作新型纳米填料，用于高性能的电催化载体材料。通过静电纺丝和碳化过程，合成了石墨化和电子导电性大大增强的GNR嵌入碳纳米纤维（G–CNF）。Pt NPs在G–CNF上的化学沉积产生了一种新的Pt–G–CNF杂化催化剂，Pt NPs均匀分布约3 nm。与Pt–CNF（原始CNFs上的Pt）和Pt–M–CNF（MWCNT嵌入CNFs上的Pt）相比，Pt–G–CNF杂化物具有显着改善的电化学活性表面积（ECSA），对CO的电氧化具有更好的CO耐受性甲醇和更高的电化学稳定性，证明G–CNF是有前途的燃料电池高性能电催化剂载体材料。