Corrigendum to '3D graphene decorated with hexagonal micro-coin of Co(OH)2: A competent electrocatalyst for hydrogen and oxygen evolution reaction' Int J Hydrogen Energy 44 (2019) 14770-14779. (11th October 2019) - Ullah, Nabi; Shah, Sayyar Ali; Xie, Meng; Rasheed, Haroon Ur; Oluigbo, Chidinma Judith; Jiang, Di; Xu, Yuanguo; Xie, Jimin