CoSe as non-noble-metal cocatalyst integrated with heterojunction photosensitizer for inexpensive H2 production under visible light
CoSe as non-noble-metal cocatalyst integrated with heterojunction photosensitizer for inexpensive H2 production under visible light
复制标题
CoSe 作为非贵金属助催化剂与异质结光敏剂集成，可在可见光下廉价生产氢气
DOI：
10.1016/j.jcat.2020.07.034
复制
发表时间：
2020-10-01
影响因子：
7.3
通讯作者：
Haroon, Muhammad
中科院分区：
文献类型：
--
作者：
Irfan, Rana Muhammad;Tahir, Mudassir Hussain;Haroon, Muhammad
开发基于地球丰富元素的廉价助催化剂是生产用于实际应用的大规模光催化 H-2 的高要求策略。在此，我们报道了利用 CoSe 作为高效助催化剂来显着提高 ZnSe/CdS 在可见光照射下的光催化 H-2 产量。在优化条件下，H-2产率最高可达785 μmol h(-1)。此外，当前系统在长达 30 小时的照射下表现出强大的稳定性，并产生了超过 23 mmol 的 H-2。该系统在单色 420 nm 光下的最高表观量子产率为 55.3%。使用光电流响应、紫外-可见漫反射吸收光谱、电化学阻抗谱和光致发光（PL）光谱来解释CoSe和ZnSe在当前光催化体系中的机制作用。这项工作展示了如何成功使用 CoSe 作为助催化剂和 ZnSe 作为可见光活性半导体，以廉价地将太阳能转化为 H-2。 (C) 2020 Elsevier Inc. 保留所有权利。
The development of inexpensive cocatalysts based on earth-abundant-elements, is highly demanding strategy to produce large-scale photocatalytic H-2 for real-life applications. Herein, we report the utilization of CoSe as a highly efficient cocatalyst to significantly improve the photocatalytic H-2 production on ZnSe/CdS under visible irradiation. The maximum H-2 production rate of 785 mu mol h(-1) was attained under optimized conditions. Furthermore, the current system showed robust stability up to 30 h of irradiation and more than 23 mmol of H-2 was produced. The highest apparent quantum yield of the system was 55.3% at monochromatic 420 nm light. Photocurrent responses, UV-vis diffuse reflectance absorption spectroscopy, electrochemical impedance spectroscopy and photoluminescence (PL) spectroscopy were used to explain the mechanistic roles of CoSe and ZnSe in current photocatalytic system. This work showcased the successful usage of CoSe as cocatalyst and ZnSe as visible light active semiconductor for inexpensive conversion of solar energy to H-2. (C) 2020 Elsevier Inc. All rights reserved.