Ultrafast\nCharge Transfer in a Core–shell CdS@Cu-TCPP-Pt\nHeterojunction for Photocatalytic Hydrogen Production Coupled with\nSelective Benzylamine Oxidation

Photocatalytic\nselective oxidation of organic substances coupled\nwith hydrogen production is believed to be one of the most favorable\npathways to make full use of photogenerated charge carriers. However,\nthis catalytic reaction is often discouraged due to the rapid recombination\nof photogenerated carriers in practical applications. In this work,\na core–shell CdS@Cu-TCPP-Pt nanorod heterojunction was dexterously\ndesigned for boosting the photocatalytic dehydrogenation performance\nof benzylamine. The transient absorption results revealed that the\nphotogenerated electron–holes could be effectively separated\nby properly matching the energy levels in CdS@Cu-TCPP. Surprisingly,\nPt embedded in Cu-TCPP not only provided abundant hydrogen production\nactive sites but also facilitated ultrafast charge transfer, which\nendowed CdS@Cu-TCPP-Pt with remarkable photocatalytic performances\nfor the coproductions of <i>N</i>-benzylidenebenzylamine\n(1 mL) with a conversion of 23.48% and H<sub>2</sub> (20.75 mmol g<sup>–1</sup> h<sup>–1</sup>) under visible irradiation,\nfar surpassing those of CdS and Cu-TCPP. Obviously, the present work\nverifies that designing and fabricating a hybrid photocatalyst with\nhigh separation efficiency of electron–hole pairs is also a\nsignificant avenue for other high-performance cooperative dual-functional\nphotocatalytic reactions.