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首页> 外文期刊>Electrocatalysis >The Hydrogen Evolution Reaction on Rhenium Metallic Electrodes: A Selected Review and New Experimental Evidence
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The Hydrogen Evolution Reaction on Rhenium Metallic Electrodes: A Selected Review and New Experimental Evidence

机译：hen金属电极上的氢析出反应：精选评论和新的实验证据

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The volcano plots reported in the field of electrocatalysis utilize data with a difference of three orders of magnitude between the worst and the best rhenium electrocatalytic activity toward the hydrogen evolution reaction (HER). However, the commonly used mean value of the exchange density current (j(0)) of the HER on rhenium is log j(0)=-2.9 A cm(-2), which is higher than the value used for platinum (log j(0)=-3.3 A cm(-2)). This fact seems to contradict Sabatier's principle and points to the possibility that this value corresponds more to rhenized surfaces than to metallic rhenium. Rhenized surfaces are primarily composed of a mixture of oxides; therefore, the electrocatalytic behavior is attributed to these thin films rather than to metallic rhenium. In addition, a selected review of rhenized electrodes is included herein because these issues have not been considered in the electrocatalysis literature at the present time. We initially believed that the kinetic parameters might have been overestimated due to the formation of rhenide ion or rhenium hydride species; however, no evidence of the formation of these species was found. Our experimental mean value of the exchange current density of the HER on metallic rhenium is 7x10(-5) A cm(-2) in acidic solution. Therefore, our results are in accordance with Sabatier's principle, which states that a weak adsorption energy of hydrogen on rhenium (energy, 6.9 kJ mol(-1)) results in a slow rate of reaction (log j(0)= -4.2 A cm(-2)), whereas an intermediate adsorption energy of hydrogen on platinum (12 kJ mol(-1)) produces a fast reaction (log j(0)=-3.3 A cm(-2)).
机译：在电催化领域报道的火山图利用的数据对toward放氢反应（HER）的最差和最佳best电催化活性之间相差三个数量级。但是，在HER上的交换密度电流（j（0））的常用平均值为log j（0）=-2.9 A cm（-2），该值高于铂的使用值（log j（0）=-3.3 A cm（-2））。这个事实似乎与Sabatier的原理相矛盾，并指出该值更可能对应于rh化表面而不是金属rh。 hen化的表面主要由氧化物的混合物组成。因此，电催化行为归因于这些薄膜而不是金属metallic。另外，由于目前在电催化文献中还没有考虑这些问题，因此本文包括对变通电极的选定综述。我们最初认为，由于rh离子或氢化rh物质的形成，动力学参数可能被高估了。但是，没有发现这些物种形成的证据。我们在金属solution上的HER交换电流密度的实验平均值在酸性溶液中为7x10（-5）A cm（-2）。因此，我们的结果符合Sabatier原理，该原理指出氢在rh上的弱吸附能（能量为6.9 kJ mol（-1））会导致反应速率变慢（log j（0）= -4.2 A cm（-2）），而氢在铂（12 kJ mol（-1））上的中间吸附能产生快速反应（log j（0）=-3.3 A cm（-2））。

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