Nanoporous Zn-doped Co3O4 sheets with single-unit-cell-wide lateral surfaces for efficient oxygen evolution and water splitting

Nanoporous Zn-doped Co3O4 sheets with abundant lateral surfaces are developed. The lateral surfaces have single-unit-cell width (0.84 +/- 0.03 nm) and contain more oxygen vacancies than conventional base/top surfaces, causing ultrahigh activity and durability for oxygen evolution and overall water splitting. Thus, the sheets are promising for practical and green hydrogen production.