Dr. M.A Kazi Institute of Chemistry University of Sindh Jamshoro, 76080, Sindh Pakistan.
Department of Science and Technology, Campus Norrkoping, Linkoping University, SE-60174 Norrkoping, Sweden.
J Nanosci Nanotechnol. 2021 Apr 1;21(4):2613-2620. doi: 10.1166/jnn.2021.19091.
An efficient, simple, environment-friendly and inexpensive cupric oxide (CuO) electrocatalyst for oxygen evolution reaction (OER) is demonstrated. CuO is chemically deposited on the porous carbon material obtained from the dehydration of common sugar. The morphology of CuO on the porous carbon material is plate-like and monoclinic crystalline phase is confirmed by powder X-ray diffraction. The OER activity of CuO nanostructures is investigated in 1 M KOH aqueous solution. To date, the proposed electrocatalyst has the lowest possible potential of 1.49 V versus RHE (reversible hydrogen electrode) to achieve a current density of 20 mA/cm₂ among the CuO based electrocatalysts and has Tafel slope of 115 mV dec. The electrocatalyst exhibits an excellent long-term stability for 6 hours along with significant durability. The enhanced catalytic active centers of CuO on the carbon material are due to the porous structure of carbon as well as strong coupling between CuO-C. The functionalization of metal oxides or other related nanostructured materials on porous carbon obtained from common sugar provides an opportunity for the development of efficient energy conversion and energy storage systems.
本文展示了一种高效、简单、环保且廉价的氧化铜（CuO）电催化剂，用于氧气析出反应（OER）。CuO 通过常见糖脱水得到的多孔碳材料的化学沉积来制备。通过粉末 X 射线衍射证实，多孔碳材料上的 CuO 形态为板状，且具有单斜晶相。在 1 M KOH 水溶液中对 CuO 纳米结构的 OER 活性进行了研究。迄今为止，在基于 CuO 的电催化剂中，所提出的电催化剂在实现 20 mA/cm²的电流密度时具有尽可能低的 1.49 V（相对于可逆氢电极）的潜在电势，且 Tafel 斜率为 115 mV dec。该电催化剂具有出色的长期稳定性，可稳定运行 6 小时，且具有显著的耐久性。CuO 在碳材料上的增强催化活性中心归因于碳的多孔结构以及 CuO-C 之间的强耦合。金属氧化物或其他相关纳米结构材料在常见糖获得的多孔碳上的功能化，为高效能量转换和储能系统的发展提供了机会。
