La2O3-modified highly dispersed AuPd alloy nanoparticles and their superior catalysis on the dehydrogenation of formic acid
La2O3-modified highly dispersed AuPd alloy nanoparticles and their superior catalysis on the dehydrogenation of formic acid
复制标题
La2O3修饰的高分散AuPd合金纳米粒子及其对甲酸脱氢的优异催化作用
DOI：
10.1016/j.ijhydene.2017.01.078
复制
发表时间：
2017-04-13
影响因子：
7.2
通讯作者：
Chen, Lixin
中科院分区：
文献类型：
--
作者：
Jiang, Yiqun;Fan, Xiulin;Chen, Lixin
甲酸(FA，HCOOH)是一种方便、安全的储氢材料，在燃料电池中具有巨大的应用潜力。然而，在多相催化剂存在下，在相对较低的温度下，FA的制氢效率很低，这仍然是一个巨大的挑战。本论文采用简单的共还原方法，成功地将La_2O_3修饰的高分散AuPd合金纳米颗粒(AuPd La_2O_3)固定在碳纳米管上。此外，该催化剂在甲酸/甲酸钠(FA/SF)体系中表现出良好的催化活性和100%的氢气选择性，在50℃时的初始循环频率(TOF)为589molH-2mol(-1)催化剂h(-1)，在室温(25℃)下的初始循环频率为280molH-2mol(-1)催化剂h-1。制备的Au_(0.3)Pd_(0.7)(La_2O_3)(0.6)/CNTs在常温下对FA的脱氢反应具有良好的催化性能，不仅为储氢体系的实际应用铺平了道路，而且还可以推广到其他催化体系。(C)2017年氢能源出版有限责任公司。爱思唯尔有限公司出版。保留所有权利。
Formic acid (FA, HCOOH), a convenient and safe hydrogen storage material, has the great potential for fuel cell applications. However, hydrogen generation of FA is inefficient in the presence of heterogeneous catalysts at relatively low temperatures, which remains a big challenge. Herein, La2O3-modified highly dispersed AuPd alloy nanoparticles (AuPd La2O3) with small particle size have been successfully anchored on carbon nanotubes (CNTs) by a facile co-reduction route. Moreover, the catalyst exhibits excellent catalytic activity and 100% hydrogen selectivity for hydrogen generation in the formic acid/sodium formate (FA/SF) system with the initial turnover frequency (TOF) value of 589 mol H-2 mol(-1) catalyst h(-1) at 50 degrees C and 280 mol H-2 mol(-1) catalyst h-1 even at room temperature (25 degrees C). The present Au0.3Pd0.7-(La2O3)(0.6)/CNTs with superior catalysis on FA dehydrogenation without any CO generation at room temperature can not only pave the way for practical application of hydrogen storage system, but also can be extended to other catalysis system. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.