题目：

New Insight of Water-Splitting Photocatalyst: H₂O₂‑Resistance Poisoning and Photothermal Deactivation in Sub-micrometer CoO Octahedrons

作者：

Weilong Shi,^a,c Feng Guo,^a Huibo Wang,^a Sijie Guo,^a Hao Li,^a Yunjie Zhou,^a Cheng Zhu,^a Yanhong Liu,^b Hui Huang,^a Baodong Mao,*^,b Yang Liu,*^,a and Zhenhui Kang*^,a

单位：

^aJiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials(FUNSOM), Soochow University, Suzhou 215123, China

^bSchool of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China

^cSchool of Physics, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China

摘要：

Hydrogen production by photocatalytic overall water-splitting represents an ideal pathway for clean energy harvesting, for which developing high-efficiency catalysts has been the central scientific topic. Nanosized CoO with high solar-to-hydrogen efficiency (5%) is one of the most promising catalyst candidates. However, poor understanding of this photocatalyst leaves the key issue of rapid deactivation unclear and severely hinders its wide application. Here, we report a sub-micrometer CoO octahedron photocatalyst with high overall-water-splitting activity and outstanding ability of H₂O₂-resistancepoisoning. We show that the deactivation of CoO catalyst originates from the unintended thermoinduced oxidation of CoO during photocatalysis, with coexistence of oxygen and water. We then demonstrate that introduction of graphene, as a heat conductor, largely enhanced the photocatalytic activity and stability of the CoO. Our work not only provides a new insight of CoO for photocatalytic water splitting but also demonstrates a new concept for photocatalyst design.

影响因子：

7.504

分区情况：

一区

链接：

http://pubs.acs.org/doi/pdf/10.1021/acsami.7b04286