Pt3CoNi/C>Pt5CoNi/C，抗CO中毒性順序?yàn)椋篜tCoNi/C>Pt3CoNi/C>Pt5CoNi/C。"/>

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噴霧干燥法制備碳載鉑鈷鎳合金催化劑及其甲醇催化氧化性能研究
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1.昆明貴金屬研究所;2.Northwest Institute for Nonferrous;3.東北大學(xué)

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國家自然科學(xué)基金（51864022）；陜西省重點(diǎn)研發(fā)項(xiàng)目（2019GY-193）


Preparation of PtCoNi alloy nanoparticles loaded on carbon black by spray drying for catalytic oxidation of methanol
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1.Kunming Institute of Precious Metals;2.Northwest Institute for Nonferrous

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    摘要:

    本文以氯鉑酸、氯化鎳和硝酸鈷為原料，XC-72炭黑為載體，通過霧化干燥法結(jié)合煅燒還原制備碳載鉑基（PtCo Ni）分散性好的多元合金納米粒子催化劑。重點(diǎn)研究表面經(jīng)過改性的炭黑對合金納米粒子形成和分散的影響規(guī)律，研究碳載PtCoNi（原子比為1:1:1）合金納米粒子的甲醇催化氧化活性、抗CO中毒能力和耐久性，以及不同原子比對催化氧化甲醇活性和抗CO中毒能力的影響規(guī)律。研究結(jié)果表明，采用表面改性后的炭黑作為載體，制備的碳載鉑基（PtCoNi）催化劑為合金納米粒子，且納米粒子在炭黑表面分散均勻，粒徑分布在1-4nm，平均粒徑為2.3nm；與商用的Pt/C催化劑相比，PtCoNi/C（原子比為1:1:1）催化劑具有更高的甲醇催化氧化活性、耐久性和抗CO中毒性；不同原子比鉑基多元催化劑在催化氧化甲醇活性上的順序?yàn)椋篜tCoNi/C>Pt3CoNi/C>Pt5CoNi/C，抗CO中毒性順序?yàn)椋篜tCoNi/C>Pt3CoNi/C>Pt5CoNi/C。

    Abstract:

    The chloroplatinic acid, nickel chloride and cobalt nitrate, as raw materials, are used to synthesize PtCoNi alloy nanoparticles with well dispersion loaded on xc-72 carbon black by spray drying method combined with calcination reduction. The influence of the surface of the carbon black on the formation and dispersion alloy nanoparticles was studied, and the effects of PtCoNi with the same atomic ratio and PtCoNi with different atomic ratio on methanol catalytic oxidation activity and CO poisoning resistance and durability were investigated in detail. The results showed that PtCoNi catalyst loaded on surface modified carbon black is alloy nanoparticles, and the nanoparticles are dispersed evenly on the surface of carbon black with particle size distribution of 1-4nm and average particle size of 2.3nm. Compared with commercial Pt/C catalysts, PtCoNi/C with the same atomic ratio has higher catalytic methanol oxidation activity, durability and CO poisoning resistance. The order of activity of PtCoNi catalysts with different atomic ratio in catalytic methanol oxidation reaction is :PtCoNi/C>Pt3CoNi/C>Pt5CoNi/C, and the sequence of CO poisoning resistance is PtCoNi/C>Pt3CoNi/C>Pt5CoNi/C.

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徐浩,李安金,姚陳,趙盤巢,李繼剛,逄芳釗,易偉.噴霧干燥法制備碳載鉑鈷鎳合金催化劑及其甲醇催化氧化性能研究[J].稀有金屬材料與工程,2020,49(11):3890~3895.[xuhao, lianjin, yaochen, zhaopanchao, lijigang, pangfangzhao, yiwei. Preparation of PtCoNi alloy nanoparticles loaded on carbon black by spray drying for catalytic oxidation of methanol[J]. Rare Metal Materials and Engineering,2020,49(11):3890~3895.]
DOI：10.12442/j. issn.1002-185X.20190980

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  • 收稿日期:2019-11-22
  • 最后修改日期:2020-01-13
  • 錄用日期:2020-02-20
  • 在線發(fā)布日期: 2020-12-09
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