Abstract

Production of hydrogen by catalytically hydrolyzing ammonia borane (AB) has attracted extensive attention in the field of catalysis and energy. However, it is still a challenge to develop a both inexpensive and active catalyst for AB hydrolysis. In this work, we designed a series of MoO3-doped MnCo2O4 (x) catalysts, which were fabricated by a hydrothermal process. The morphology, crystalline structure, and chemical components of the catalysts were systematically analyzed. The catalytic behavior of the catalyst in AB hydrolysis was investigated. Among these catalysts, MoO3-doped MnCo2O4 (0.10) microspheres composed of nanosheets exhibited the highest catalytic activity. The apparent activation energy is 34.24 kJ mol−1 and the corresponding turnover frequency is 26.4 molhydrogen min−1 molcat−1. Taking into consideration the low cost and high performance, the MoO3-doped MnCo2O4 (0.10) microspheres composed of nanosheets represent a promising catalyst to hydrolyze AB for hydrogen production.

Highlights

  • With the rapid consumption of fossil fuels worldwide, environmental pollution is increasing, and the energy crisis is worsening

  • Taking into consideration the low cost and high performance, the MoO3 -doped MnCo2 O4 (0.10) microspheres composed of nanosheets represent a promising catalyst to hydrolyze ammonia borane (AB) for hydrogen production

  • In 2006, Xu et al demonstrated for the first time that noble metals such as Pt, Rh and Pd exhibit high catalytic activity towards AB hydrolysis at room temperature [10]

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Summary

Introduction

With the rapid consumption of fossil fuels worldwide, environmental pollution is increasing, and the energy crisis is worsening. As a clean and sustainable energy carrier, has attracted widespread attention worldwide It is considered part of a new generation of promising fuels due to its high energy density, zero emission, and easy availability [1,2]. In 2006, Xu et al demonstrated for the first time that noble metals such as Pt, Rh and Pd exhibit high catalytic activity towards AB hydrolysis at room temperature [10]. Zhang et al reported Ni nanoparticles supported on multi-walled carbon nanotubes by atomic layer deposition [20], which can catalyze AB hydrolysis Their catalytic activity is significantly lower than that of precious metal catalysts.

Synthesis of Catalysts
Characterizations
3.* Results and Discussion
Scanning
Hydrogen
Conclusions
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