State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China; University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
Talanta. 2018 Aug 15;186:154-161. doi: 10.1016/j.talanta.2018.04.026. Epub 2018 Apr 17.
The transition metal oxides based catalysts have drawn great attention for their application in the electrolysis of water for renewable energy generation. Although manganese oxides were rarely used as oxygen evolution reaction (OER) catalysts, they were still considered as active and efficient OER catalysts due to the earth-abundant and low toxic nature of manganese. In this work, we proposed a facile method for the synthesis of high-performance electrochemical OER catalyst by magnetically stirring the mixture of 1,3,4-thiadiazole-2,5-dithiol (DMTD), Ni and MnO nanowires (NWs) in ethanol at room temperature, noted as Ni/DMTD/MnO. The Ni/DMTD complex and MnO NWs showed synergistically enhanced OER activity and excellent durability in alkaline solution. The introducing of MnO and the presence of Ni after the oxidation of Ni were the key factors which improve the OER performance. The potential at 10 mA cm was 1.492 V (vs RHE) with a Tafel slope of 69.46 mV dec in 1 M KOH aqueous solution, comparable to the state-of-art RuO. The results indicated that MnO was found to have the capability to enhance not only the catalytic activity but also operation stability of Ni/DMTD/MnO towards OER.
基于过渡金属氧化物的催化剂因其在可再生能源发电用水电解中的应用而受到极大关注。尽管锰氧化物很少用作析氧反应 (OER) 催化剂，但由于锰的丰富性和低毒性，它们仍被认为是活性和高效的 OER 催化剂。在这项工作中，我们提出了一种简便的方法，通过在室温下将 1,3,4-噻二唑-2,5-二硫醇 (DMTD)、Ni 和 MnO 纳米线 (NWs) 的混合物在乙醇中进行搅拌来合成高性能电化学 OER 催化剂，标记为 Ni/DMTD/MnO。Ni/DMTD 配合物和 MnO NWs 在碱性溶液中表现出协同增强的 OER 活性和优异的耐久性。MnO 的引入和 Ni 在氧化后的存在是提高 OER 性能的关键因素。在 1 M KOH 水溶液中，10 mA cm 的电位为 1.492 V（相对于 RHE），塔菲尔斜率为 69.46 mV dec，可与最先进的 RuO 相媲美。结果表明，MnO 被发现不仅能够提高 Ni/DMTD/MnO 对 OER 的催化活性，而且能够提高其操作稳定性。
