论文标题
Delafossite型PDCOO2散装单晶的原位修饰，用于可逆的氢吸附和快速的氢进化
In situ modification of delafossite type PdCoO2 bulk single crystal for reversible hydrogen sorption and fast hydrogen evolution
论文作者
论文摘要
在Delafossite型PDCOO2中观察到极高的电导率的观察到了极大的当前感兴趣，并且有证据表明，在PDCOO2的散装晶体中流动时电子的行为就像流体。因此，该材料是研究异质反应中电子传递过程的理想平台。在这里，我们报告说，散装单晶PDCOO2用作氢进化反应的有希望的电催化剂（HERS）。仅31 mV的超电势会导致目前的密度为10 mA cm^（-2），并伴有高长期稳定性。我们已经确切地确定了在电化学激活后通过在表面层中形成应变的PD纳米簇后修饰的晶体表面结构。这些纳米簇表现出可逆的氢吸附和解吸，从而创造了更多活跃的氢进入。具有超高电导率的散装PDCOO2单晶，充当PD纳米簇的天然底物，为电子转移提供了高速通道
The observation of extraordinarily high conductivity in delafossite-type PdCoO2 is of great current interest, and there is some evidence that electrons behave like a fluid when flowing in bulk crystals of PdCoO2. Thus, this material is an ideal platform for the study of the electron transfer processes in heterogeneous reactions. Here, we report the use of bulk single crystal PdCoO2 as a promising electrocatalyst for hydrogen evolution reactions (HERs). An overpotential of only 31 mV results in a current density of 10 mA cm^(-2), accompanied by high long-term stability. We have precisely determined that the crystal surface structure is modified after electrochemical activation with the formation of strained Pd nanoclusters in the surface layer. These nanoclusters exhibit reversible hydrogen sorption and desorption, creating more active sites for hydrogen access. The bulk PdCoO2 single crystal with ultra-high conductivity, which acts as a natural substrate for the Pd nanoclusters, provides a high-speed channel for electron transfer
