Boosting Visible-Light-Driven Photocatalytic Hydrogen Evolution with an Integrated Nickel Phosphide-Carbon Nitride System

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• 作者：Dr. Arindam Indra ; Amitava Acharjya ; Dr. Prashanth W. Menezes ; Dr. Christoph Merschjann ; Dr. Dirk Hollmann ; Dr. Michael Schwarze ; Mesut Aktas ; Aleksej Friedrich ; Prof. Dr. Stefan Lochbrunner ; Prof. Dr. Arne Thomas and Prof. Dr. Matthias Driess
• 刊名：Angewandte Chemie
• 出版年：2017
• 出版时间：February 1, 2017
• 年：2017
• 卷：129
• 期：6
• 页码：1675-1679
• 全文大小：2894K
• ISSN：1521-3757

文摘

Solar light harvesting by photocatalytic H₂ 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 (Ni₂P) which acts as a superior co-catalyst for efficient photocatalytic H₂ evolution by visible light. This integrated system shows a much higher catalytic activity than the physical mixture of Ni₂P 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 Ni₂P–sg-CN heterojunction is the prime source for improved activity.