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Noble‐Metal‐Free Ni‐MoOx Nanoparticles Supported on BN as a Highly Efficient Catalyst toward Complete Decomposition of Hydrazine Borane
Small Methods ( IF 10.7 ) Pub Date : 2018-09-27 , DOI: 10.1002/smtd.201800250
Si‐Jia Li 1 , Xia Kang 1 , Ba‐Ri Wulan 1 , Xian‐Lin Qu 2 , Kun Zheng 2 , Xiao‐Dong Han 2 , Jun‐Min Yan 1
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Hydrazine borane (HB) has been considered as a promising hydrogen storage material due to its high hydrogen content and stability at room temperature. For the first time, a facile wet‐chemical method is developed to synthesize amorphous/low crystalline noble‐metal‐free Ni‐MoOx/BN composite as a low‐cost and high‐efficient catalyst for hydrogen generation from HB decomposition. The as‐prepared Ni‐MoOx/BN hybrid exerts 100% selective conversion and can catalyze HB complete decomposition within 5 min, corresponding to a turnover frequency (TOF) value of 600.0 h−1 at 323 K. The excellent catalytic activity may be attributed to the good dispersion, uniform particle size (≈2.6 nm), and electronic effect between nanoparticles (NPs) and support material. On further reducing the dosage of Ni, the catalyst still exhibits supreme performance, with the TOF value of 2370 h−1 (nNi = 0.008 mmol) at 323 K, which is the highest one among all the reported catalysts for full decomposition of HB. Thus, the excellent catalytic results provide more possibilities for the effective application of HB as a promising hydrogen storage material.

中文翻译:

BN负载的无贵金属Ni-MoOx纳米颗粒是高效的肼硼烷完全分解催化剂

肼硼烷(HB)由于其高的氢含量和在室温下的稳定性而被认为是一种有前途的储氢材料。首次开发了一种简便的湿化学方法,以合成非晶/低结晶的无贵金属Ni-MoO x / BN复合材料,作为一种低成本高效的HB分解产生氢的催化剂。所制备的Ni-MoO x / BN杂化物具有100%的选择性转化率,并且可以在5分钟内催化HB完全分解,对应于600.0 h -1的周转频率(TOF)值在323 K时。出色的催化活性可能归因于良好的分散性,均匀的粒径(约2.6 nm)以及纳米颗粒(NP)与载体材料之间的电子效应。在进一步减少Ni的用量后,该催化剂仍表现出卓越的性能,在323 K下的TOF值为2370 h -1n Ni = 0.008 mmol),是所有已报道的HB完全分解催化剂中最高的。因此,优异的催化效果为有效应用HB作为一种有前途的储氢材料提供了更多的可能性。
更新日期:2018-09-27
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