Saeedeh Golrokhifar, Ali Shahroudi, Sajjad Habibzadeh
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引用次数: 0
摘要
摘要 氢是一种高能量密度的清洁燃料，被认为是未来的替代能源之一。氢进化反应（HER）可以大规模生产纯氢，同时也在寻求有效的电催化剂。本文采用电沉积法合成了二元和三元混合过渡金属（锰、钴和镍），并将其用作高效的氢进化反应电催化剂。研究发现，与使用单一金属相比，过渡金属的组合能积极调整相应的形态和活性。也就是说，与其他开发的电催化剂相比，起始电位为 83 mV、Tafel 斜坡为 103 \(\frac{mV}{dec}\)的镍锰电催化剂在碱性介质中表现出更高的 HER 活性。这种高活性与锰和镍之间的协同作用提高了内在活性、能效和电导率有关。镍锰电催化剂还表现出持久稳定的性能，使其有望成为高效 HER 电催化的电催化剂。 图表摘要
Cost-Effective Electrodeposited Mixed Transition Metal Electrocatalysts for Efficient Hydrogen Evolution Reaction
Hydrogen is a clean fuel with high energy density, considered one of the alternative energy sources of the future. Hydrogen evolution reaction (HER) could produce pure hydrogen on a large scale while striving for effective electrocatalysts. Here, binary and ternary mixed transition metals (Mn, Co, and Ni) were synthesized by an electrodeposition method and employed as efficient HER electrocatalysts. It was found that the combination of transition metals could positively tune the corresponding morphology and activity rather than using single metals. Namely, NiMn electrocatalysts with an onset potential of 83 mV and a Tafel slope of 103 \(\frac{mV}{dec}\) showed superior activity toward HER in alkaline media compared to the other developed electrocatalysts. This high activity was related to improved intrinsic activity, higher energy efficiency, and enhanced conductivity thanks to the synergy between manganese and nickel. NiMn electrocatalyst also displayed a durable and stable performance, rendering it a promising electrocatalyst for efficient electrocatalysis of HER.
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