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Ti-Cu層合電極的電解水析氫性能
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1.大連理工大學(xué);2.工業(yè)裝備結(jié)構(gòu)分析國(guó)家重點(diǎn)實(shí)驗(yàn)室

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國(guó)家自然科學(xué)基金(項(xiàng)目號(hào)12072067,11702058)


Hydrogen precipitation performance of Ti-Cu laminated electrodes for electrolytic water
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    摘要:

    目前通過(guò)使用粘接劑將催化劑粘接到基體上成為電解水析氫電極的主流制備方式,但粘接劑本身電阻較大且粘接強(qiáng)度低,易脫落。金屬Pt是目前公認(rèn)的最好的析氫金屬電極,但其昂貴的價(jià)格限制了工業(yè)上大規(guī)模的使用。通過(guò)爆炸焊接技術(shù)將析氣過(guò)電位低、穩(wěn)定性好和強(qiáng)度高的鈦與導(dǎo)電性?xún)?yōu)異的銅結(jié)合,構(gòu)筑出一種自支撐鈦-銅層合電極。電化學(xué)測(cè)試表明:相對(duì)于單一金屬電極,該層合電極在1 mol/L KOH溶液中表現(xiàn)出良好的電解水析氫(HER)性能和導(dǎo)電性且穩(wěn)定性?xún)?yōu)異,在電流密度為10 mA·cm-2,測(cè)試時(shí)間為20000 s的穩(wěn)定性測(cè)試中電位起伏只有0.05 V。電解水析氫量測(cè)量實(shí)驗(yàn)結(jié)果中同樣能夠驗(yàn)證在實(shí)際工作中,鈦-銅層合電極具備更優(yōu)異的析氫性能。利用工作中產(chǎn)生的凹凸不平和富含孔洞的表面形貌暴露出更多的活性位點(diǎn)和電化學(xué)活性表面積,使得層合電極的HER性能在長(zhǎng)時(shí)間工作中不會(huì)降低,且會(huì)略有提高,為電極材料制備提供有效且能夠降低成本的方向,具有廣闊的工程應(yīng)用前景。

    Abstract:

    Currently, bonding the catalyst to the substrate by using adhesive is the mainstream way to prepare electrodes for hydrogen precipitation in electrolytic water, but the adhesive itself has high resistance and low bonding strength, and is easy to fall off. Metal Pt is currently recognized as the best metal electrode for hydrogen precipitation, but its expensive price limits the industrial use on a large scale. A self-supporting titanium-copper laminate electrode was constructed by combining titanium, which has low overpotential for gas precipitation, good stability and high strength, with copper, which has excellent electrical conductivity, through explosion welding technology. Electrochemical tests have shown that the laminated electrode exhibits good electrolytic hydrogen precipitation (HER) performance and conductivity and excellent stability in 1 mol/L KOH solution with a potential fluctuation of only 0.05 V at a current density of 10 mA-cm-2 and a stability test time of 20,000 s. The uneven and porous surface morphology produced during operation has been used to expose more of the electrodes. The experimental results of hydrogen precipitation measurement of electrolytic water can also verify the superior hydrogen precipitation performance of titanium-copper laminated electrodes in practice. The surface morphology exposed more active sites and electrochemically active surface area, so that the HER performance of the laminated electrode will not decrease and will be slightly improved during long-time operation, which provides an effective and cost-reducing direction for electrode material preparation and has a broad engineering application prospect.

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孫偉,楊金城,毛婉君,楊明翰,溫靜,邵詩(shī)琪,李曉杰. Ti-Cu層合電極的電解水析氫性能[J].稀有金屬材料與工程,2023,52(5):1963~1969.[sunwei, yangjincheng, maowanjun, yangminghan, wenjing, shaoshiqi, lixiaojie. Hydrogen precipitation performance of Ti-Cu laminated electrodes for electrolytic water[J]. Rare Metal Materials and Engineering,2023,52(5):1963~1969.]
DOI:10.12442/j. issn.1002-185X.20220649

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  • 收稿日期:2022-08-11
  • 最后修改日期:2022-11-11
  • 錄用日期:2022-11-24
  • 在線發(fā)布日期: 2023-06-08
  • 出版日期: 2023-05-29