Dispersed Nickel Cobalt Oxyphosphide Nanoparticles Confined in Multichannel Hollow Carbon Fibers for Photocatalytic CO2 Reduction
Dispersed Nickel Cobalt Oxyphosphide Nanoparticles Confined in Multichannel Hollow Carbon Fibers for Photocatalytic CO2 Reduction
复制标题
DOI：
10.1002/anie.201909707
复制
发表时间：
2019-10-15
影响因子：
16.6
通讯作者：
Lou, Xiong Wen (David)
中科院分区：
文献类型：
--
作者：
Wang, Yan;Wang, Sibo;Lou, Xiong Wen (David)
用于高效光催化CO2还原的材料对于太阳能到碳燃料转化是期望的。在此，高度分散的镍钴氧磷化物纳米颗粒（NiCoOP NPs）被限制在多通道中空碳纤维（MHCF）中，以构建用于高效CO2光还原的NiCoOP-NPs@ MHCF催化剂。该合成涉及静电纺丝、磷化和碳化步骤，并且允许容易地调整化学组成。在催化剂中，具有超小尺寸和高分散性的混合金属氧磷化物NPs为氧化还原反应提供了丰富的催化活性位点。同时，具有高电导率和开口端的多通道中空碳基质将有效地促进质量/电荷转移，改善CO2吸附，并防止金属氧磷化物NPs聚集。优化的杂金属氧磷化物催化剂表现出相当大的活性，光敏CO2还原，提供了16.6 μ mol h（-1）（每0.1毫克的催化剂）的高CO的演变率。
Materials for high-efficiency photocatalytic CO2 reduction are desirable for solar-to-carbon fuel conversion. Herein, highly dispersed nickel cobalt oxyphosphide nanoparticles (NiCoOP NPs) were confined in multichannel hollow carbon fibers (MHCFs) to construct the NiCoOP-NPs@MHCFs catalysts for efficient CO2 photoreduction. The synthesis involves electrospinning, phosphidation, and carbonization steps and permits facile tuning of chemical composition. In the catalyst, the mixed metal oxyphosphide NPs with ultrasmall size and high dispersion offer abundant catalytically active sites for redox reactions. At the same time, the multichannel hollow carbon matrix with high conductivity and open ends will effectively promote mass/charge transfer, improve CO2 adsorption, and prevent the metal oxyphosphide NPs from aggregation. The optimized hetero-metal oxyphosphide catalyst exhibits considerable activity for photosensitized CO2 reduction, affording a high CO evolution rate of 16.6 mu mol h(-1) (per 0.1 mg of catalyst).