Facile synthesis of NaNbxTa1-xO3 with abundant oxygen vacancies for photocatalytic hydrogen evolution without co-catalyst

NaNbxTa1-xO3, sodium tantalate and niobate with B atoms substitution is synthesized by a facile one-step hydrothermal method. They are effective photocatalysts for hydrogen evolution from water splitting without co-catalyst. NaNb0.33Ta0.67O3 exhibits the best performance with produced H2 of 1038 μmol g−1 in 5 h, which is more than 5 times than NaTaO3 and NaNbO3. It is also close to 5 times and 2 times than NaTaO3/Pt and NaNbO3/Pt, respectively....