Yao Yu-Hao, Yang Yan, Wang Ya, Zhang Hao, Tang Hong-Liang, Zhang Hong-Yu, Zhang GuiLing, Wang Yong, Zhang Feng-Ming, Yan Hong
School of Material Science and Chemical Engineering, Harbin University of Science and Technology, No.4, Linyuan Road, Harbin 150040, PR China.
College of Materials Science and Engineering, Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan University of Technology, Taiyuan 030024, PR China.
J Colloid Interface Sci. 2022 Feb 15;608(Pt 3):2613-2622. doi: 10.1016/j.jcis.2021.10.183. Epub 2021 Nov 1.
Covalent organic frameworks (COFs) have been recognized as a new type of promising visible-light-driven photocatalysts for H evolution, while it still is a key point to facilitate the separation and transfer of photoinduced charges for further enhancing their activities. In this work, we fabricated a new type of ternary Pt/rGO/COF photocatalysts with Pt cocatalyst precisely anchored on rGO serving as electron collector for largely enhanced H evolution. A series of ternary hybrid materials were obtained via one-pot photoreduction of Pt and GO under visible-light irradiation in a solution the same as photocatalytic H evolution reaction and simultaneous self-assembling of rGO/COF heterostructure. No need isolation, the synthetic system could be further used for photocatalytic H evolution reaction and the results show the H evolution rate of Pt/rGO(20%)/TpPa-1-COF hybrid material is 19.59 mmol·g·h, 6.51 times higher than that of Pt/TpPa-1-COF. The essential role of the exclusively distributed Pt nanoparticles on rGO to the high H evolution activity was confirmed by various comparisons of activity for the samples with diverse Pt distribution.
共价有机框架材料（COFs）已被公认为是一种新型的、有前景的用于析氢的可见光驱动光催化剂，然而，促进光生电荷的分离和转移以进一步提高其活性仍是一个关键问题。在这项工作中，我们制备了一种新型的三元Pt/rGO/COF光催化剂，其中Pt助催化剂精确地锚定在作为电子收集器的rGO上，从而大大提高了析氢能力。通过在与光催化析氢反应相同的溶液中，在可见光照射下对Pt和GO进行一锅法光还原，并同时自组装rGO/COF异质结构，获得了一系列三元杂化材料。无需分离，该合成体系可进一步用于光催化析氢反应，结果表明Pt/rGO(20%)/TpPa-1-COF杂化材料的析氢速率为19.59 mmol·g·h，比Pt/TpPa-1-COF高6.51倍。通过对具有不同Pt分布的样品的活性进行各种比较，证实了rGO上专门分布的Pt纳米颗粒对高析氢活性的重要作用。
