3Co一維合金納米線。隨后,合金納米線在真空環(huán)境下進(jìn)行高溫退火,分別在400 ℃和650 ℃轉(zhuǎn)變?yōu)闊o序相和有序相Pt3Co納米線并通過結(jié)構(gòu)表征證明其已實(shí)現(xiàn)有序化轉(zhuǎn)變。合金催化劑在AAO模板內(nèi)退火,有效地防止了其在高溫環(huán)境中產(chǎn)生團(tuán)聚。通過磷酸和鉻酸的溶解,合金納米線從AAO中釋放,并用于電催化氧還原反應(yīng)測(cè)試。正如預(yù)期一樣,與無序Pt3Co納米線和商業(yè)Pt/C顆粒相比,有序Pt3Co納米線表現(xiàn)出更好的半波電位和質(zhì)量活性,證實(shí)了有序Pt3Co納米線在元素分布和晶格結(jié)構(gòu)上的優(yōu)勢(shì)。此外,有序和無序Pt3Co納米線在經(jīng)過5000次耐久性循環(huán)測(cè)試后,仍然比Pt/C顆粒具有更強(qiáng)的穩(wěn)定性。由此可以看出,有序Pt3Co納米線作為一種可接受的,具有潛在商業(yè)價(jià)值的催化材料,成為未來燃料電池催化劑的備選材料。"/>

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結(jié)構(gòu)有序化金屬間Pt3Co納米線用于強(qiáng)化電催化氧還原性能
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深圳大學(xué)材料學(xué)院

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國家自然科學(xué)基金資助(51742165)


Preparation of Structurally Ordered Intermetallic Pt3Co Nanowires and Electrocatalytic Performance for Oxygen Reduction Reaction
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    摘要:

    氧還原反應(yīng)(ORR)之于燃料電池,金屬空氣電池等清潔能源轉(zhuǎn)化裝置十分重要,因此設(shè)計(jì)并合成高效且穩(wěn)定的陰極氧還原催化劑已是目前熱門的發(fā)展課題。為了達(dá)到精準(zhǔn)合成材料,且最大程度地使用鉑的目的,我們?cè)诖耸褂枚嗫籽趸X模板(AAO)進(jìn)行恒電位沉積,在一定濃度的溶液中合成Pt3Co一維合金納米線。隨后,合金納米線在真空環(huán)境下進(jìn)行高溫退火,分別在400 ℃和650 ℃轉(zhuǎn)變?yōu)闊o序相和有序相Pt3Co納米線并通過結(jié)構(gòu)表征證明其已實(shí)現(xiàn)有序化轉(zhuǎn)變。合金催化劑在AAO模板內(nèi)退火,有效地防止了其在高溫環(huán)境中產(chǎn)生團(tuán)聚。通過磷酸和鉻酸的溶解,合金納米線從AAO中釋放,并用于電催化氧還原反應(yīng)測(cè)試。正如預(yù)期一樣,與無序Pt3Co納米線和商業(yè)Pt/C顆粒相比,有序Pt3Co納米線表現(xiàn)出更好的半波電位和質(zhì)量活性,證實(shí)了有序Pt3Co納米線在元素分布和晶格結(jié)構(gòu)上的優(yōu)勢(shì)。此外,有序和無序Pt3Co納米線在經(jīng)過5000次耐久性循環(huán)測(cè)試后,仍然比Pt/C顆粒具有更強(qiáng)的穩(wěn)定性。由此可以看出,有序Pt3Co納米線作為一種可接受的,具有潛在商業(yè)價(jià)值的催化材料,成為未來燃料電池催化劑的備選材料。

    Abstract:

    :In the use of clean energy conversion devices such as fuel cells and metal-air batteries, the oxygen reduction reaction process has proven to be exceedingly crucial. Therefore, the design and synthesis of efficient and stable cathodic oxygen reduction catalysts have been an indispensable task at present. In order to achieve accurate synthesis of materials, and the maximum utilization of platinum, anodic aluminum oxide (AAO) template was used to accurately synthesize bimetallic one-dimensional Pt3Co nanowires in a certain concentration of solution. Subsequently, the alloy nanowires underwent a high-temperature phase transition in the template under vacuum, which effectively prevented material agglomeration. The disordered and ordered Pt3Co nanowires were obtained by phase transition annealing at 400 ℃and 650 ℃ respectively and were confirmed by structural characterizations for order phase transition. As expected, compared to disordered Pt3Co, ordered Pt3Co exhibited better mass activity and half-wave potential, confirming the advantages of ordered bimetal alloy nanowires in composition and structure. After the accelerated durability cycle tests, the ordered and disordered Pt3Co nanowires were still more stable than Pt/Cparticles, indicating the advantage of one-dimensional nanowires. It can be seen that the ordered Pt3Co, as an acceptable catalytic material with potential commercial value, has become alternative materials for future fuel cell catalysts.

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吳啟帆,陳子浩,張海清,蘇軼坤.結(jié)構(gòu)有序化金屬間Pt3Co納米線用于強(qiáng)化電催化氧還原性能[J].稀有金屬材料與工程,2021,50(1):138~144.[Wu Qifan, Chen Zihao, Zhang Haiqing, Su Yikun. Preparation of Structurally Ordered Intermetallic Pt3Co Nanowires and Electrocatalytic Performance for Oxygen Reduction Reaction[J]. Rare Metal Materials and Engineering,2021,50(1):138~144.]
DOI:10.12442/j. issn.1002-185X.20200003

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  • 收稿日期:2020-01-02
  • 最后修改日期:2020-03-07
  • 錄用日期:2020-03-19
  • 在線發(fā)布日期: 2021-02-05
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