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碳載PtNi合金催化劑的制備、表征及氧還原催化性能研究
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昆明貴金屬研究所 稀貴金屬綜合利用新技術(shù)國家重點(diǎn)實(shí)驗(yàn)室

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國家自然科學(xué)基金(項(xiàng)目號(hào)：51864022)；昆明市高層次人才引進(jìn)創(chuàng)新技術(shù)進(jìn)步項(xiàng)目(項(xiàng)目號(hào)：13020163)；云南貴金屬集團(tuán)R D應(yīng)用研究(2020040603)


Preparation, Characterization and Oxygen Reduction Reaction Catalytic Performance of Carbon Loaded PtNi Alloy Catalysts
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1.Kunming Institute of Precious Metals,State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals Kunming 650106;2.China

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    摘要:

    以乙酰丙酮鉑(Pt(acac)2)、乙酰丙酮鎳(Ni(acac)2)為前驅(qū)體,三正辛基氧膦(TOPO)為表面修飾劑,油胺(OAm)為還原劑,N,N-二甲基甲酰胺(DMF)為助劑,超導(dǎo)碳科琴黑ECP為載體,采用液相合成法制備了碳載PtNi合金納米催化劑(Pt2.7Ni/C)。通過TEM對(duì)其形貌進(jìn)行表征,ICP-AES進(jìn)行定性和定量分析,XRD對(duì)其結(jié)構(gòu)進(jìn)行表征,并進(jìn)行電化學(xué)陰極氧還原催化性能研究。研究表明：所制備的Pt2.7Ni/C納米催化劑粒徑分布在3~11 nm之間,平均粒徑為6.25 nm；在酸性條件下,當(dāng)電位在0.9 V(vs. RHE)時(shí),Pt2.7Ni/C納米催化劑的質(zhì)量比活性為796.08 mA mg-1Pt,為商業(yè)Pt/C(JM)催化劑的4.0倍,面積比活性為3.60 mA cm-2,為商業(yè)Pt/C(JM)催化劑的11.3倍。同時(shí)在經(jīng)過5000和10000圈的加速耐久性實(shí)驗(yàn)后,Pt2.7Ni/C納米催化劑催化活性依舊高于商用Pt/C(JM)催化劑,表現(xiàn)出優(yōu)異的氧還原催化性能。

    Abstract:

    Carbon loaded PtNi alloy nanocatalysts (Pt2.7Ni/C) were prepared by liquid phase synthesis using platinum acetylacetonate (Pt(acac)2) and nickel acetylacetonate (Ni(acac)2) as precursors, tri-n-octylphosphine oxide (TOPO) as surface modifier, oleylamine (OAm) as reducing agent, N,N-dimethylformamide (DMF) as auxiliary, and superconducting carbon kochen black ECP as carrier. The morphology of Pt2.7Ni/C was characterized by TEM, the qualitative and quantitative analysis by ICP-AES, the structural characterization by XRD, and the electrochemical cathodic oxygen reduction catalytic performance was further investigated. It was shown that the particle size of the prepared Pt2.7Ni/C nanocatalysts were in range of 3-11 nm with an average size of ~6.25 nm. The mass activity of Pt2.7Ni/C nanocatalysts was 796.08 mA.mg-1Pt (4.0 times as effective as the commercial Pt/C(JM) catalysts) and the specific activity was 3.60 mA.cm2(11.3 times as effective as the commercial Pt/C(JM) catalysts) under acidic conditions when the potential was at 0.9 V (vs. RHE). The catalytic activity of the Pt2.7Ni/C nanocatalysts remained higher than that of the commercial Pt/C(JM) catalysts after 5000 and 10000 turns of accelerated endurance experiments, showing excellent oxygen reduction catalytic performance of the Pt2.7Ni/C nanocatalysts.

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李鴻鵬,蔣云波,何建云.碳載PtNi合金催化劑的制備、表征及氧還原催化性能研究[J].稀有金屬材料與工程,2023,52(4):1345~1351.[Li Hongpeng, Jiang Yunbo, He Jianyun. Preparation, Characterization and Oxygen Reduction Reaction Catalytic Performance of Carbon Loaded PtNi Alloy Catalysts[J]. Rare Metal Materials and Engineering,2023,52(4):1345~1351.]
DOI：10.12442/j. issn.1002-185X.20220278

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  • 收稿日期:2022-04-06
  • 最后修改日期:2022-05-20
  • 錄用日期:2022-05-25
  • 在線發(fā)布日期: 2023-05-01
  • 出版日期: 2023-04-25