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Enhancing Hydrogen Evolution Reaction by Synergistically Coupling NiMo Alloy with Ni(OH)2 Nanosheet on Carbon Cloth
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-06-12 , DOI: 10.1002/slct.202000955 Chunyan Li 1 , Jiankang Wang 2 , Yajing Wang 2 , Jiaxin Li 1 , Zhongping Yao 1 , Zhaohua Jiang 1
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-06-12 , DOI: 10.1002/slct.202000955 Chunyan Li 1 , Jiankang Wang 2 , Yajing Wang 2 , Jiaxin Li 1 , Zhongping Yao 1 , Zhaohua Jiang 1
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Sluggish water dissociation step severely constraints the efficiency of alkaline hydrogen evolution reaction (HER). Inspired by the merits of the favorable water dissociation ability of Ni(OH)2 and moderate hydrogen bonding strength on NiMo alloy, in this paper, NiMo/Ni(OH)2 nanohybrid on carbon cloth (CC) was synthesized by hydrothermal method and subsequent electrodeposition technique. XRD, SEM and XPS confirmed NiMo alloy was electrodeposited on Ni(OH)2 nanosheet surface. Alkaline HER measurement unveiled that NiMo/Ni(OH)2/CC exhibited the highest alkaline HER performance with overpotential of 132 mV at 10 mA/cm2 among as‐prepared samples, Tafel slope and EIS spectra verified the HER kinetics and the water dissociation rate were enhanced after embedding NiMo alloy into Ni(OH)2 nanosheets. The outstanding alkaline HER performance can be assigned to the coupling effect between NiMo alloy and Ni(OH)2, and Ni alloying with Mo. The preeminent HER performance and facile preparation method of NiMo/Ni(OH)2/CC endow it with prospect application in alkaline water splitting.
中文翻译：
NiMo合金与Ni（OH）2纳米片协同偶联在碳布上增强氢释放反应
缓慢的水离解步骤严重限制了碱性氢放出反应（HER）的效率。鉴于Ni（OH）2的良好的水解离能力和适度的氢键结合在NiMo合金上的优点，本文通过水热法合成了碳布（CC）上的NiMo / Ni（OH）2纳米杂化体，随后电沉积技术。XRD，SEM和XPS证实NiMo合金电沉积在Ni（OH）2纳米片表面上。碱性HER测量揭示了NiMo / Ni（OH）2 / CC表现出最高的碱性HER性能，在10 mA / cm 2时的超电势为132 mV在制备的样品中，Tafel斜率和EIS谱图证明了将NiMo合金嵌入Ni（OH）2纳米片中后，HER动力学和水离解速率得到提高。优异的碱性HER性能可归因于NiMo合金与Ni（OH）2以及Ni与Mo合金化之间的耦合作用。NiMo / Ni（OH）2 / CC的优异HER性能和简便的制备方法为该方法提供了前景在碱性水分解中的应用。
更新日期：2020-06-12
中文翻译：
NiMo合金与Ni（OH）2纳米片协同偶联在碳布上增强氢释放反应
缓慢的水离解步骤严重限制了碱性氢放出反应（HER）的效率。鉴于Ni（OH）2的良好的水解离能力和适度的氢键结合在NiMo合金上的优点，本文通过水热法合成了碳布（CC）上的NiMo / Ni（OH）2纳米杂化体，随后电沉积技术。XRD，SEM和XPS证实NiMo合金电沉积在Ni（OH）2纳米片表面上。碱性HER测量揭示了NiMo / Ni（OH）2 / CC表现出最高的碱性HER性能，在10 mA / cm 2时的超电势为132 mV在制备的样品中，Tafel斜率和EIS谱图证明了将NiMo合金嵌入Ni（OH）2纳米片中后，HER动力学和水离解速率得到提高。优异的碱性HER性能可归因于NiMo合金与Ni（OH）2以及Ni与Mo合金化之间的耦合作用。NiMo / Ni（OH）2 / CC的优异HER性能和简便的制备方法为该方法提供了前景在碱性水分解中的应用。
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