| Summary: | Exploration of highly efficient and robust catalyst is pivotal for electrocatalytic degradation of dye wastewater, but it still is a challenge. Here, we develop a three-dimensional self-supported SnO<sub>2</sub>-Mn<sub>2</sub>O<sub>3</sub> hybrid nanosheets grown on carbon cloth (noted by SnO<sub>2</sub>-Mn<sub>2</sub>O<sub>3</sub>@CC) electrode via a simple hydrothermal method and annealing treatment. Benefitting from the interlaced nanosheets architecture that enlarges the surface area and the synergetic component effect that accelerates the interfacial electronic transfer, SnO<sub>2</sub>-Mn<sub>2</sub>O<sub>3</sub>@CC electrode exhibits a superior electrocatalytic degradation efficiency for cationic blue X-GRRL dye in comparison with the single metal oxide electrode containing SnO<sub>2</sub>@CC and Mn<sub>2</sub>O<sub>3</sub>@CC. The degradation efficiency of cationic blue X-GRRL on SnO<sub>2</sub>-Mn<sub>2</sub>O<sub>3</sub>@CC electrode can reach up to 97.55% within 50 min. Furthermore, self-supported architecture of nanosheets on carbon cloth framework contributes to a robust stability compared with the traditional electrode via the multiple dip/brush coating accompanied by the thermal decomposition method. SnO<sub>2</sub>-Mn<sub>2</sub>O<sub>3</sub>@CC electrode exhibits excellent recyclability, which can still retain a degradation efficiency of 94.12% after six cycles. This work may provide a new pathway for the design and exploration of highly efficient and robust electrooxidation catalysts for dye degradation.
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