Developing effective catalysts for hydrogen evolution from hydrolysis of ammonia borane (AB) is of great significance considering the useful applications of hydrogen. Herein, graphitic carbon nitride (g-C₃N₄) prepared through the simply pyrolysis of urea was employed as a support for Rh nanoparticles (NPs) stabilization. The in-situ generated Rh NPs supported on g-C₃N₄ with an average size of 3.1 nm were investigated as catalysts for hydrogen generation from the hydrolysis of AB under mild conditions. The Rh/g-C₃N₄ catalyst exhibits a high turnover frequency of 969 mol H₂· (min·mol_Rh)⁻¹ and a low activation energy of 24.2 kJ/mol. The results of the kinetic studies show that the catalytic hydrolysis of AB over the Rh/g-C₃N₄ catalyst is a zero-order reaction with the AB concentration and a first-order reaction with the Rh concentration. This work demonstrates that g-C₃N₄ is a useful support to design and synthesis of effective Rh-based catalyst for hydrogen-based applications.

考虑到氢的有用应用，开发用于从氨硼烷（AB）水解中释放氢的有效催化剂具有重要意义。在本文中，通过尿素的简单热解制备的石墨碳氮化物（gC ₃ N ₄）被用作Rh纳米颗粒（NPs）稳定化的载体。研究了负载在gC ₃ N ₄上，平均粒径为3.1 nm的原位生成的Rh NPs作为在温和条件下由AB水解产生氢的催化剂。Rh / gC ₃ N ₄催化剂的高周转频率为969 mol H ₂ ·（min·mol _Rh）^-1低活化能为24.2 kJ / mol。动力学研究的结果表明，AB在Rh / gC ₃ N ₄催化剂上的催化水解是AB浓度的零级反应和Rh浓度的一级反应。这项工作表明，gC ₃ N ₄是设计和合成用于氢基应用的有效Rh基催化剂的有用载体。