Spanos, I., Tesch, M. F., Yu, M., Tüysüz, H., Zhang, J., Feng, X., et al. (2019). Facile Protocol for Alkaline Electrolyte Purification and Its Influence on a Ni–Co Oxide Catalyst for the Oxygen Evolution Reaction. ACS Catalysis, 9, 8165-8170. doi:10.1021/acscatal.9b01940.