标题：Photocorrosion of Cuprous Oxide in Hydrogen Production: Rationalising Self-Oxidation or Self-Reduction
作者：Toe, Cui Ying; Zheng, Zhaoke; Wu, Hao; Scott, Jason; Amal, Rose; Ng, Yun Hau
作者机构：[Toe, Cui Ying; Wu, Hao; Scott, Jason; Amal, Rose; Ng, Yun Hau] Univ New South Wales, Particles & Catalysis Res Grp, Sch Chem Engn, Sydney, NSW 2052, 更多
通讯作者：Ng, YH;Ng, YH;Ng, Yun Hau
通讯作者地址：[Ng, YH]Univ New South Wales, Particles & Catalysis Res Grp, Sch Chem Engn, Sydney, NSW 2052, Australia;[Ng, YH]City Univ Hong Kong, Sch Energy & Envi 更多
来源：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
关键词：crystal morphology; cuprous oxide; hydrogen evolution reaction;; photocatalysis; photooxidation
摘要：Cuprous Oxide (Cu2O) is a photocatalyst with severe photocorrosion issues. Theoretically, it can undergo both self-oxidation (to form copper oxide (CuO)) and self-reduction (to form metallic copper (Cu)) upon illumination with the aid of photoexcited charges. There is, however, limited experimental understanding of the "dominant" photocorrosion pathway. Both photocorrosion modes can be regulated by tailoring the conditions of the photocatalytic reactions. Photo-oxidation of Cu2O (in the form of a suspension system), accompanied by corroded morphology, is kinetically favourable and is the prevailing deactivation pathway. With knowledge of the dominant deactivation mode of Cu2O, suppression of self-photooxidation together with enhancement in its overall photocatalytic performance can be achieved after a careful selection of sacrificial hole (h(+)) scavenger. In this way, stable hydrogen (H-2) production can be attained without the need for deposition of secondary components.