College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
Inorg Chem. 2023 Jul 17;62(28):11256-11264. doi: 10.1021/acs.inorgchem.3c01545. Epub 2023 Jul 5.
Alcohol oxidation reactions are known to be significant in the advancement of sustainable, renewable energy sources. Searching for catalytic materials with powerful, reliable, and economic performance is of great importance. Due to their excellent intrinsic performance, outstanding stability, and inexpensiveness, ultrathin layered double hydroxides (LDHs) are considered to be competitive electrocatalysts. However, the electrocatalytic property of ultrathin LDHs is still confined by the predominant exposure of the (003) basal plane. Hence, we have engineered active edge facets in ultrathin NiCo-LDHs, which possess abundant oxygen vacancies (V), by a facile one-step strategy. Experimental results show that NiCo-LDH-E synthesized in ethanol demonstrates an ultrathin structure, rich oxygen vacancies, and more active facets, exhibiting a higher electrochemical active area of 3.25 cm, which is 1.18 times that of NiCo-LDH-W (2.75 cm). In addition, the current density of NiCo-LDH-E in methanol and ethanol oxidation reactions could reach 159.5 and 136.3 mA cm, which are 2.8 and 1.7 times that of NiCo-LDH-W, respectively.
醇氧化反应在推进可持续、可再生能源方面具有重要意义。寻找具有强大、可靠和经济性能的催化材料非常重要。由于其优异的内在性能、卓越的稳定性和低廉的价格，超薄层状双氢氧化物（LDHs）被认为是有竞争力的电催化剂。然而，超薄 LDHs 的电催化性能仍然受到（003）基面占主导地位的限制。因此，我们通过一种简便的一步策略，在超薄 NiCo-LDHs 中构建了具有丰富氧空位（V）的活性边缘面。实验结果表明，在乙醇中合成的 NiCo-LDH-E 具有超薄结构、丰富的氧空位和更多的活性面，表现出更高的电化学活性面积 3.25 cm2，是 NiCo-LDH-W（2.75 cm2）的 1.18 倍。此外，NiCo-LDH-E 在甲醇和乙醇氧化反应中的电流密度可分别达到 159.5 和 136.3 mA cm-2，分别是 NiCo-LDH-W 的 2.8 和 1.7 倍。
