Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China.
Nanoscale. 2019 Feb 21;11(8):3506-3513. doi: 10.1039/c8nr09005j.
The development of a robust and low-cost non-noble metal catalyst for photocatalytic H2 evolution is of great importance for practical applications. In this study, monodisperse Ni nanoparticles of controlled sizes were prepared by a facile method and anchored on graphitic carbon nitride (g-C3N4) nanosheets via a self-assembly route. The noble-metal-free Ni/g-C3N4 composite catalysts exhibit excellent photocatalytic activities for the hydrolytic dehydrogenation of ammonia borane (AB) under visible light. An optimum AB hydrolysis rate was obtained when the size of the Ni NPs was 3.2 nm, with an initial turnover frequency of 18.7 mol(hydrogen) mol(catalyst)-1 min-1 and an apparent activation energy of 36 kJ mol-1. This study provides validity for constructing high performance first-row transition metal nano-photocatalysts for the hydrolytic dehydrogenation of AB.
开发用于光催化 H2 演化的强大且低成本的非贵金属催化剂对于实际应用非常重要。在这项研究中，通过简便的方法制备了单分散的具有受控尺寸的 Ni 纳米颗粒，并通过自组装方法将其锚定在石墨相氮化碳 (g-C3N4) 纳米片上。无贵金属的 Ni/g-C3N4 复合催化剂在可见光下表现出优异的光催化活性，可用于氨硼烷 (AB) 的水解脱氢。当 Ni NPs 的尺寸为 3.2nm 时，AB 的水解速率达到最佳，初始周转频率为 18.7mol（氢气）mol（催化剂）-1 min-1，表观活化能为 36kJ mol-1。这项研究为构建用于 AB 水解脱氢的高性能第一过渡金属纳米光催化剂提供了依据。
