Li Teng, Li Youji, Jin Zhiliang
School of Chemistry and Chemical Engineering, Ningxia Key Laboratory of Solar Chemical Conversion Technology, Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan 750021, P. R. China.
College of Chemistry and Chemical Engineering, Jishou University, Jishou, Hunan 416000, P. R. China.
Inorg Chem. 2022 Aug 15;61(32):12809-12821. doi: 10.1021/acs.inorgchem.2c01909. Epub 2022 Jul 31.
The development of clean energy is one of the effective strategies to solve carbon peak and carbon neutrality. The severe recombination of photogenerated carriers is one of the fundamental reasons that hinder the development of photocatalysis. In this work, NiCo-MOF/ZIF was obtained by the "ZIF on MOF" strategy for the first time, and a stable bonding state of surface P(δ)-Co/Ni(δ)-O(δ) was formed on the surface of the catalyst by a one-step oxidation-phosphorus doping strategy. The X-ray photoelectron spectroscopy technique proves that phosphorus doping forms a unique bonding state on the surface of CoO-NiO. The novel surface bonding state can effectively inhibit the recombination of photogenerated carriers and can increase the migration rate of photogenerated electrons, which accelerates the process of photocatalytic hydrogen evolution. Photocatalytic hydrogen evolution kinetics verifies that the formation of P(δ)-Co/Ni(δ)-O(δ) bonding states can accelerate the process of photocatalytic hydrogen evolution, and the durability of the catalyst is verified by cycling experiments. This work provides a new strategy for catalyst synthesis, new horizons, and effective strategies for the surface design of catalysts and the development of photocatalytic hydrogen evolution.
发展清洁能源是解决碳达峰和碳中和的有效策略之一。光生载流子的严重复合是阻碍光催化发展的根本原因之一。在本工作中，首次通过“MOF 上的 ZIF”策略制备了 NiCo-MOF/ZIF，并通过一步氧化-磷掺杂策略在催化剂表面形成了稳定的表面 P(δ)-Co/Ni(δ)-O(δ)键合状态。X 射线光电子能谱技术证明磷掺杂在 CoO-NiO 表面形成了独特的键合状态。这种新型表面键合状态能有效抑制光生载流子的复合，并能提高光生电子的迁移速率，从而加速光催化析氢过程。光催化析氢动力学证实了 P(δ)-Co/Ni(δ)-O(δ)键合状态的形成能加速光催化析氢过程，循环实验验证了催化剂的耐久性。本工作为催化剂合成提供了新策略，为催化剂表面设计和光催化析氢发展提供了新视野和有效策略。
