Gold Nanoparticle/Multi‐walled Carbon Nanotube Hybrid as a Stable Catalyst for the Oxygen Reduction Reaction,ChemElectroChem

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Gold Nanoparticle/Multi‐walled Carbon Nanotube Hybrid as a Stable Catalyst for the Oxygen Reduction Reaction
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-02-15 , DOI: 10.1002/celc.201701311
Li Xiang ₁ , Zhihong Luo ₁ , Chengliang Hu ₁ , Zhicheng Bian ₁ , Jianwei Lu ₂ , Yuan-Cheng Cao ₃ , Kun Luo ₄

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A gold nanoparticle/multi‐walled carbon nanotube (Au/MWNTs) hybrid was prepared following the scalable one‐pot reduction of chloroauric acid with tetrakis(hydroxymethyl)chloride in the presence of MWNTs. TEM, XRD, FTIR, XPS, and thermogravimetric analyses indicate that gold nanoparticles (Au NPs, d≈2.9 nm) protected with the tris(hydroxymethyl)oxide (THPO) ligand were deposited on the MWNTs, where no Oswald ripening was observed for the Au NPs after 3000 voltammetric cycling. The Au/MWNTs hybrid with THPO ligand exhibits an impressive catalytic activity toward the oxygen reduction reaction (ORR), following a direct four‐electron mechanism in alkaline solution, and it also manifests excellent long‐term cycling durability and tolerance to the possible crossover methanol. This demonstrates prospective for the hybrid to serve as a stable ORR catalyst for direct methanol fuel cells.

中文翻译：

金纳米颗粒/多壁碳纳米管杂化体作为稳定的氧还原反应催化剂

在存在多壁碳纳米管的情况下，用四（羟甲基）氯化物将氯金酸进行可缩放的一锅还原，制备了金纳米颗粒/多壁碳纳米管（Au / MWNTs）杂化物。TEM，XRD，FTIR，XPS和热重分析表明，金纳米颗粒（Au NPs，d用三（羟甲基）氧化物（THPO）配体保护的≈2.9nm）沉积在MWNT上，在3000伏安循环后，未观察到Au NP的奥斯瓦尔德熟化。带有THPO配体的Au / MWNTs杂化物在碱性溶液中具有直接的四电子机理，对氧还原反应（ORR）表现出令人印象深刻的催化活性，并且还表现出出色的长期循环耐久性和对可能的交叉甲醇的耐受性。这证明了该杂化物有望用作直接甲醇燃料电池的稳定ORR催化剂。

更新日期：2018-02-15

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