Photocatalytic splitting of relatively plentiful water into O2 and H2 supplies a possible solution for storing solar energy to meet energy demands and environmental requirements[1].The water oxidation half reaction to...Photocatalytic splitting of relatively plentiful water into O2 and H2 supplies a possible solution for storing solar energy to meet energy demands and environmental requirements[1].The water oxidation half reaction to form dioxygen known as the oxygen evolution reaction(OER,2H2O→O2+4H++4e-)is attracting more attention because there are already known materials for efficient mediation of the reduction step(4H++4e-→2H2)[2].Current research focuses on understanding the mechanisms of OER and development of new OER catalysts.The widely studied OER systems include platinum surface[1],transition metal oxides[2],transition metal complexes[3],3d transition metal spinels and perovskites[4],and metal-organic framework(MOF)materials based on3d transition metals[5].In these materials,transition metals in the surface generally serve as active centers for the OER,while the surrounding atomic environments determine their performance and stability[6].However,preparation of the surface has a large effect on reactivity(defects,kinks,low coordinate sites)therefore it is difficult to predict an OER material’s properties by its bulk structure.展开更多
基金the National Key R&D Program of China(Grant No.2016YFE0204200)。
文摘Photocatalytic splitting of relatively plentiful water into O2 and H2 supplies a possible solution for storing solar energy to meet energy demands and environmental requirements[1].The water oxidation half reaction to form dioxygen known as the oxygen evolution reaction(OER,2H2O→O2+4H++4e-)is attracting more attention because there are already known materials for efficient mediation of the reduction step(4H++4e-→2H2)[2].Current research focuses on understanding the mechanisms of OER and development of new OER catalysts.The widely studied OER systems include platinum surface[1],transition metal oxides[2],transition metal complexes[3],3d transition metal spinels and perovskites[4],and metal-organic framework(MOF)materials based on3d transition metals[5].In these materials,transition metals in the surface generally serve as active centers for the OER,while the surrounding atomic environments determine their performance and stability[6].However,preparation of the surface has a large effect on reactivity(defects,kinks,low coordinate sites)therefore it is difficult to predict an OER material’s properties by its bulk structure.
