Integrated Bundle Electrode with Wettability-Gradient Copper Cones Inducing Continuous Generation, Directional Transport, and Efficient Collection of H2 Bubbles.
Integrated Bundle Electrode with Wettability-Gradient Copper Cones Inducing Continuous Generation, Directional Transport, and Efficient Collection of H2 Bubbles.
复制标题
具有润湿性梯度铜锥体的集成束电极可诱导氢气气泡的连续生成、定向传输和高效收集。
DOI：
10.1021/acsami.1c04993
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发表时间：
2021
影响因子：
9.5
通讯作者：
Cunming Yu
中科院分区：
文献类型：
--
作者：
Jinke Zhang;Fuyao Dong;Chuqian Wang;Jingming Wang;Lei Jiang;Cunming Yu
析氢反应作为一种将各种能量转化为高纯度氢的有效过程，受到了科学研究和工业生产的广泛关注。然而，它的广泛应用仍然面临着相当大的困难，例如电极上的气泡覆盖和电解液中气泡的分散，这会干扰电流分布，将活性中心与反应离子隔离，导致高反应过电位和大的欧姆电压降。因此，及时消除电极产生的气泡并避免其直接释放到电解液中是解决这些问题的有效方法。在这项工作中，我们开发了一种精致的电极，即具有润湿性梯度铜锥的集成束电极，它具有连续产生、直接传输和高效收集氢泡的多功能。所有的过程都在电极上进行，它不仅可以有效地去除产生的氢泡，还可以防止氢泡释放到电解液中，这将极大地推动水电解的发展，并为人们制造更高效的HER器件提供灵感。
The hydrogen evolution reaction (HER), as an efficient process of converting various energies into high-purity hydrogen, has attracted much attention from both scientific research studies and industrial productions. However, its wide applications still confront considerable difficulties, for example, bubble coverage on the electrode and bubble dispersion in the electrolyte, which will disturb current distribution and isolate active sites from reaction ions resulting in a high reaction overpotential and large Ohmic voltage drop. Consequently, timely removing the generated gas bubbles from the electrode as well as avoiding their direct release into the electrolyte can be an effective approach to address these issues. In this work, we have developed an elegant electrode, that is, the integrated bundle electrode with wettability-gradient copper cones, which is endowed with the multifunctions of continuous generation, direct transport, and efficient collection of hydrogen bubbles. All processes are proceeding on the electrode, which not only remove the generated hydrogen bubbles efficiently but also prevent the hydrogen bubbles from releasing into the electrolyte, which should greatly advance the development of water electrolysis and offer inspirations for people to fabricate more efficient HER devices.