Metalorganic Chemistry and Inorganic Materials, Department of Chemistry, Technische Universität Berlin, Strasse des 17 Juni 135, Sekr. C2, 10623, Berlin, Germany.
Functional Materials, Department of Chemistry, Technische Universität Berlin, Hardenbergstraße 40, 10623, Berlin, Germany.
Angew Chem Int Ed Engl. 2017 Feb 1;56(6):1653-1657. doi: 10.1002/anie.201611605. Epub 2017 Jan 9.
Solar light harvesting by photocatalytic H evolution from water could solve the problem of greenhouse gas emission from fossil fuels with alternative clean energy. However, the development of more efficient and robust catalytic systems remains a great challenge for the technological use on a large scale. Here we report the synthesis of a sol-gel prepared mesoporous graphitic carbon nitride (sg-CN) combined with nickel phosphide (Ni P) which acts as a superior co-catalyst for efficient photocatalytic H evolution by visible light. This integrated system shows a much higher catalytic activity than the physical mixture of Ni P and sg-CN or metallic nickel on sg-CN under similar conditions. Time-resolved photoluminescence and electron paramagnetic resonance (EPR) spectroscopic studies revealed that the enhanced carrier transfer at the Ni P-sg-CN heterojunction is the prime source for improved activity.
通过光催化水分解制氢来利用太阳能可以解决化石燃料温室气体排放问题，并提供替代清洁能源。然而，开发更高效、更稳定的催化体系仍然是大规模技术应用的一大挑战。在这里，我们报告了一种溶胶-凝胶法制备的介孔石墨相氮化碳（sg-CN）与磷化镍（Ni P）结合的方法，Ni P 作为高效可见光光催化制氢的优异共催化剂。在相似条件下，与 Ni P 和 sg-CN 的物理混合物或负载在 sg-CN 上的金属镍相比，该集成体系表现出更高的催化活性。时间分辨光致发光和电子顺磁共振（EPR）光谱研究表明，在 Ni P-sg-CN 异质结处增强的载流子转移是提高活性的主要原因。
