Ti₃C₂ MXene folded nanosheets with Co(OH)₂ integrated on carbon cloth for enhanced oxygen evolution performance

The oxygen evolution reaction (OER) suffers from low intrinsic activity, poor oxidative stability, and insufficient electrical conductivity, which severely limit the practical deployment of non‑precious metal electrocatalysts. To overcome these obstacles, we designed an MXene@Co(OH)₂ hybrid supported on carbon cloth (MXene@Co(OH)₂/CC) using a straightforward electrodeposition and vacuum drying method. Strong interfacial interactions between MXene and Co(OH)₂ boost charge transfer, create abundant accessible active sites, and reinforce structural integrity under OER working conditions. Consequently, the MXene@Co(OH)₂/CC electrode requires only 261 mV to achieve 10 mA cm^-2 and shows a Tafel slope of 61.7 mV dec^-1, and retains excellent performance for more than 1100 h. Beyond delivering a highly efficient and low‑cost OER catalyst, this work also provides a valuable paradigm for constructing well‑defined heterostructured catalytic systems via interfacial engineering.